├── .gitignore
├── client
    ├── .gitignore
    ├── app
    │   └── index.js
    └── package.json
├── project.clj
├── resources
    └── public
    │   └── www
    │       ├── index.html
    │       └── js
    │           ├── bundle.js
    │           ├── d3.js
    │           └── d3.min.js
└── src
    └── huql
        ├── core.clj
        ├── github
            ├── client.clj
            └── core.clj
        ├── graph
            ├── core.clj
            ├── github.clj
            ├── query.clj
            └── schema.clj
        └── utils.clj


/.gitignore:
--------------------------------------------------------------------------------
 1 | /target
 2 | /classes
 3 | /checkouts
 4 | pom.xml
 5 | pom.xml.asc
 6 | *.jar
 7 | *.class
 8 | /.lein-*
 9 | /.nrepl-port
10 | .hgignore
11 | .hg/
12 | profiles.clj
13 | .DS_Store
14 | 


--------------------------------------------------------------------------------
/client/.gitignore:
--------------------------------------------------------------------------------
1 | node_modules
2 | 


--------------------------------------------------------------------------------
/client/app/index.js:
--------------------------------------------------------------------------------
  1 | var React = require('react');
  2 | var request = require('superagent');
  3 | 
  4 | // http://jsfiddle.net/unLSJ/
  5 | var printer = {};
  6 | printer.json = {
  7 |     replacer: function(match, pIndent, pKey, pVal, pEnd) {
  8 |         var key = '<span class=json-key>';
  9 |         var val = '<span class=json-value>';
 10 |         var str = '<span class=json-string>';
 11 |         var r = pIndent || '';
 12 |         if (pKey)
 13 |             r = r + key + pKey.replace(/[": ]/g, '') + '</span>: ';
 14 |         if (pVal)
 15 |             r = r + (pVal[0] == '"' ? str : val) + pVal + '</span>';
 16 |         return r + (pEnd || '');
 17 |     },
 18 |     prettyPrint: function(obj) {
 19 |         var jsonLine = /^( *)("[\w]+": )?("[^"]*"|[\w.+-]*)?([,[{])?$/mg;
 20 |         return JSON.stringify(obj, null, 3)
 21 |             .replace(/&/g, '&amp;').replace(/\\"/g, '&quot;')
 22 |             .replace(/</g, '&lt;').replace(/>/g, '&gt;')
 23 |             .replace(jsonLine, printer.json.replacer);
 24 |     }
 25 | };
 26 | 
 27 | var QueryEditor = React.createClass({
 28 | 
 29 |     handleRun: function (ev) {
 30 |         ev.preventDefault();
 31 | 
 32 |         var query = this.refs.query.getDOMNode().value.trim();
 33 | 
 34 |         this.props.run(query);
 35 |     },
 36 | 
 37 |     render: function () {
 38 |         return (
 39 |             <form className="query-editor" onSubmit={this.handleRun}>
 40 |                 <button>RUN</button>
 41 |                 <h4>QUERY</h4>
 42 | 
 43 |                 <textarea defaultValue={this.props.query} ref="query"></textarea>
 44 |             </form>
 45 |         );
 46 |     }
 47 | 
 48 | });
 49 | 
 50 | var ResultView = React.createClass({
 51 | 
 52 |     resultHtml: function () {
 53 |         if (this.props.result) {
 54 |             return printer.json.prettyPrint(this.props.result)
 55 |         }
 56 |     },
 57 | 
 58 |     render: function () {
 59 |         return (<pre dangerouslySetInnerHTML={{__html: this.resultHtml()}}></pre>);
 60 |     }
 61 | });
 62 | 
 63 | var ProfileView = React.createClass({
 64 | 
 65 |     componentDidMount: function() {
 66 |         var el = this.getDOMNode();
 67 | 
 68 |         this.createChart(el);
 69 |         this.updateChart(el, this.props.profile);
 70 |     },
 71 | 
 72 |     componentDidUpdate: function() {
 73 |         var el = this.getDOMNode();
 74 |         this.updateChart(el, this.props.profile);
 75 |     },
 76 | 
 77 |     createChart: function (el) {
 78 |         var chart = d3.select(el).select('svg').attr('width', 800)
 79 |             .append('g').attr('transform', 'translate(10, 10)');
 80 | 
 81 |         chart.append('g')
 82 |             .attr('class', 'x axis')
 83 |             .attr('transform', 'translate(200, 20)')
 84 | 
 85 |         chart.append('g')
 86 |             .attr('class', 'bars')
 87 |             .attr('transform', 'translate(0, 30)')
 88 |     },
 89 | 
 90 |     updateChart: function (el, data) {
 91 |         console.log('data', data);
 92 |         var barHeight = 20;
 93 | 
 94 |         var chart = d3.select(el).select('svg').attr('height', barHeight * data.length + 50).select('g');
 95 | 
 96 |         data.sort(function (a, b) {
 97 |             if (a.start > b.start) {
 98 |                 return 1;
 99 |             }
100 | 
101 |             if (a.start < b.start) {
102 |                 return -1;
103 |             }
104 | 
105 |             return 0;
106 |         });
107 | 
108 |         function appendChildren(acc, path, data) {
109 |             var children = data.filter(function (d) {
110 |                 return d.parent === path;
111 |             });
112 | 
113 |             children.forEach(function (d) {
114 |                 acc.push(d);
115 |                 appendChildren(acc, d.path, data);
116 |             });
117 | 
118 |             return acc;
119 |         }
120 | 
121 |         data = appendChildren([], "[]", data);
122 | 
123 |         var start = d3.min(data, function (d) { return d.start; });
124 |         var end = d3.max(data, function (d) { return d.end; });
125 | 
126 |         var x = d3.scale.linear()
127 |             .domain([0, end - start])
128 |             .range([0, 500]);
129 | 
130 |         var axis = d3.svg.axis()
131 |             .scale(x)
132 |             .orient('top');
133 | 
134 |         chart.select('.x.axis').call(axis);
135 | 
136 |         var bars = chart.select('.bars').selectAll('.bar').data(data);
137 | 
138 |         bars.exit().remove();
139 | 
140 |         var barEnter = bars.enter().append('g').attr('class', 'bar');
141 | 
142 |         barEnter.append('rect')
143 |             .attr('class', 'end')
144 |             .attr('transform', 'translate(200, 0)')
145 |             .attr('height', barHeight / 2);
146 | 
147 |         barEnter.append('rect')
148 |             .attr('class', 'execute')
149 |             .attr('transform', 'translate(200, 0)')
150 |             .attr('height', barHeight / 2);
151 | 
152 |         barEnter.append('text')
153 |             .attr('x', 0)
154 |             .attr('y', 7.5);
155 | 
156 |         bars.attr('transform', function (d, i) { return 'translate(0, ' + i * barHeight + ')'; });
157 | 
158 |         bars.select('rect.end')
159 |             .attr('x', function (d) { return x(d.start - start); })
160 |             .attr('width', function (d) { return d3.max([x(d.end - d.start), 1]); })
161 | 
162 |         bars.select('rect.execute')
163 |             .attr('x', function (d) { return x(d.start - start); })
164 |             .attr('width', function (d) { return d3.max([x(d.execute - d.start), 1]); })
165 | 
166 |         bars.select('text')
167 |             .text(function (d) { return d.path; })
168 | 
169 |     },
170 | 
171 |     render: function () {
172 |         return (
173 |             <div className="profile-view">
174 |                 <svg></svg>
175 |             </div>
176 |         );
177 |     }
178 | 
179 | });
180 | 
181 | var ResultContainer = React.createClass({
182 | 
183 |     onSetResult: function (ev) {
184 |         ev.preventDefault();
185 |         this.props.setResultTab("result");
186 |     },
187 | 
188 |     onSetProfile: function (ev) {
189 |         ev.preventDefault();
190 |         this.props.setResultTab("profile");
191 |     },
192 | 
193 |     render: function () {
194 |         var view;
195 | 
196 |         if (this.props.error) {
197 |             view = (<div className="error-view">{this.props.error}</div>);
198 |         } else {
199 |             view = this.props.resultTab === "profile"
200 |                 ? (<ProfileView profile={this.props.profile} />)
201 |                 : (<ResultView result={this.props.result} />);
202 |         }
203 | 
204 |         return (
205 |             <div className="result-container">
206 |                 <button onClick={this.onSetResult}>RESULT</button>
207 |                 <button onClick={this.onSetProfile}>PROFILE</button>
208 |                 {view}
209 |             </div>
210 |         );
211 |     }
212 | 
213 | });
214 | 
215 | var QueryExampleContainer = React.createClass({
216 | 
217 |     getInitialState: function () {
218 |         return {
219 |             query: queries[this.props.initialQuery] || "",
220 |             resultTab: this.props.initialResultTab || "result"
221 |         };
222 |     },
223 | 
224 |     componentWillMount: function () {
225 |         if (this.props.autorun) {
226 |             this.run(this.state.query);
227 |         }
228 |     },
229 | 
230 |     run: function (query) {
231 |         request.get('/api/graph').query({query: query}).end(function (res) {
232 | 
233 |             if (res.ok) {
234 |                 var result = JSON.parse(res.text);
235 |                 profile = result['profile-data'];
236 |                 delete result['profile-data'];
237 | 
238 |                 this.setState({
239 |                     query: query,
240 |                     result: result,
241 |                     profile: profile,
242 |                     error: null
243 |                 });
244 |             } else {
245 |                 this.setState({
246 |                     query: query,
247 |                     result: null,
248 |                     error: res.text ? JSON.parse(res.text) : "Unknown error :(",
249 |                     profile: []
250 |                 });
251 |             }
252 | 
253 | 
254 |         }.bind(this));
255 |     },
256 | 
257 |     setResultTab: function (tab) {
258 |         this.setState({
259 |             resultTab: tab
260 |         });
261 |     },
262 | 
263 |     render: function () {
264 |         return (
265 |             <div className="query-container">
266 |                 <div className="col33">
267 |                     <QueryEditor query={this.state.query} run={this.run} />
268 |                 </div>
269 |                 <div className="col67">
270 |                     <ResultContainer
271 |                         result={this.state.result}
272 |                         profile={this.state.profile}
273 |                         error={this.state.error}
274 |                         resultTab={this.state.resultTab}
275 |                         setResultTab={this.setResultTab} />
276 |                 </div>
277 |             </div>
278 |         )
279 |     }
280 | });
281 | 
282 | var queries = {
283 |     simple: `
284 | Repository(facebook/react) {
285 |     id,
286 |     name,
287 |     full_name,
288 |     private,
289 |     html_url,
290 |     description,
291 |     fork,
292 |     url,
293 |     homepage,
294 |     open_issues,
295 |     default_branch
296 | }`,
297 |     nested: `
298 | Repository(facebook/react) {
299 |     id,
300 |     name,
301 |     full_name,
302 |     description,
303 |     owner {
304 |         id,
305 |         login,
306 |         type
307 |     }
308 | }`,
309 |     nestedmult: `
310 | Repository(facebook/react) {
311 |     id,
312 |     name,
313 |     full_name,
314 |     description,
315 |     owner {
316 |         id,
317 |         login,
318 |         type
319 |     },
320 |     organization {
321 |         id,
322 |         name,
323 |         login,
324 |         location,
325 |         type,
326 |         url
327 |     }
328 | }`,
329 |     nestedDate: `
330 | Repository(facebook/react) {
331 |     id,
332 |     name,
333 |     full_name,
334 |     description,
335 |     created_at {
336 |         month,
337 |         day,
338 |         year
339 |     },
340 |     updated_at {
341 |         month,
342 |         day,
343 |         year
344 |     }
345 | }`,
346 |     collection: `
347 | Repository(facebook/react) {
348 |     id,
349 |     name,
350 |     full_name,
351 |     description,
352 |     contributors.first(10) {
353 |         count,
354 |         edges {
355 |             cursor,
356 |             node {
357 |                 id,
358 |                 name,
359 |                 login
360 |             }
361 |         }
362 |     }
363 | }`,
364 |     pagination: `
365 | Repository(facebook/react) {
366 |     id,
367 |     name,
368 |     full_name,
369 |     description,
370 |     contributors.after(197597).first(10) {
371 |         count,
372 |         edges {
373 |             cursor,
374 |             node {
375 |                 id,
376 |                 name,
377 |                 login
378 |             }
379 |         }
380 |     }
381 | }`,
382 |     startswith: `
383 | Organization(facebook) {
384 |     id,
385 |     name,
386 |     login,
387 |     description,
388 |     repositories.starts_with(r).first(5) {
389 |         edges {
390 |             node {
391 |                 id,
392 |                 name,
393 |                 full_name,
394 |                 description
395 |             }
396 |         }
397 |     }
398 | }`,
399 |     dateformat: `
400 | User(zpao) {
401 |     id,
402 |     name,
403 |     login,
404 |     location,
405 |     created_at {
406 |         month,
407 |         day,
408 |         year,
409 |         format(YYYY-MM-dd)
410 |     }
411 | }`,
412 |     multipleusers: `
413 | Users(zpao, modocache, leebyron) {
414 |     id,
415 |     name,
416 |     login,
417 |     location,
418 |     repositories.first(5) {
419 |         count,
420 |         edges {
421 |             node {
422 |                 id,
423 |                 full_name
424 |             }
425 |         }
426 |     },
427 |     organizations.first(5) {
428 |         count,
429 |         edges {
430 |             node {
431 |                 id,
432 |                 name
433 |             }
434 |         }
435 |     }
436 | }`,
437 |     type: `
438 | Repository(facebook/react) {
439 |     __type__ {
440 |         name,
441 |         description,
442 |         fields {
443 |             name,
444 |             type,
445 |             description
446 |         }
447 |     }
448 | }`,
449 |     validation: `
450 | User(zpao) {
451 |     id,
452 |     name,
453 |     repositories {
454 |         count,
455 |         edges {
456 |             cursor,
457 |             node {
458 |                 id,
459 |                 name,
460 |                 fake_field
461 |             }
462 |         }
463 |     }
464 | }`,
465 |     closing: `
466 | User(zpao) {
467 |     login,
468 |     id,
469 |     avatar_url,
470 |     gravatar_id,
471 |     url,
472 |     html_url,
473 |     followers.first(5) { count, edges { cursor, node { id, name, login } } },
474 |     following.first(5) { count, edges { cursor, node { id, name, login } } },
475 |     starred.first(5) { count, edges { cursor, node { id, name, full_name } } },
476 |     subscriptions.first(5) { count, edges { cursor, node { id, name, full_name } } },
477 |     repositories.first(5) { count, edges { cursor, node { id, name, full_name } } },
478 |     type,
479 |     site_admin,
480 |     name,
481 |     company,
482 |     blog,
483 |     location,
484 |     email,
485 |     hireable,
486 |     bio,
487 |     created_at { month, day, year },
488 |     updated_at { month, day, year }
489 | }`,
490 |     facebook: `
491 | Facebook {
492 |     id,
493 |     name,
494 |     login,
495 |     description,
496 |     location,
497 |     public_members.first(10) {
498 |         count,
499 |         edges {
500 |             cursor,
501 |             node {
502 |                 id,
503 |                 name,
504 |                 location,
505 |                 repositories {
506 |                     count
507 |                 }
508 |             }
509 |         }
510 |     },
511 |     repositories.first(10) {
512 |         count,
513 |         edges {
514 |             cursor,
515 |             node {
516 |                 id,
517 |                 name,
518 |                 full_name
519 |             }
520 |         }
521 |     }
522 | }`
523 | 
524 | };
525 | 
526 | 
527 | React.render(
528 |     <QueryExampleContainer initialQuery={"simple"} initialResultTab={"result"} autorun={true} />,
529 |     document.getElementById('simple-query')
530 | );
531 | 
532 | React.render(
533 |     <QueryExampleContainer initialQuery={"nested"} />,
534 |     document.getElementById('nested-query')
535 | );
536 | 
537 | React.render(
538 |     <QueryExampleContainer initialQuery={"nestedmult"} />,
539 |     document.getElementById('nested-mult-query')
540 | );
541 | 
542 | React.render(
543 |     <QueryExampleContainer initialQuery={"nestedDate"} />,
544 |     document.getElementById('date-query')
545 | );
546 | 
547 | React.render(
548 |     <QueryExampleContainer initialQuery={"collection"} />,
549 |     document.getElementById('collection-query')
550 | );
551 | 
552 | React.render(
553 |     <QueryExampleContainer initialQuery={"pagination"} />,
554 |     document.getElementById('pagination-query')
555 | );
556 | 
557 | React.render(
558 |     <QueryExampleContainer initialQuery={"startswith"} />,
559 |     document.getElementById('starts-with-query')
560 | );
561 | 
562 | React.render(
563 |     <QueryExampleContainer initialQuery={"dateformat"} />,
564 |     document.getElementById('date-format-query')
565 | );
566 | 
567 | React.render(
568 |     <QueryExampleContainer initialQuery={"multipleusers"} />,
569 |     document.getElementById('multiple-users-query')
570 | );
571 | 
572 | React.render(
573 |     <QueryExampleContainer initialQuery={"type"} />,
574 |     document.getElementById('type-query')
575 | );
576 | 
577 | React.render(
578 |     <QueryExampleContainer initialQuery={"validation"} />,
579 |     document.getElementById('validation-query')
580 | );
581 | 
582 | React.render(
583 |     <QueryExampleContainer initialQuery={"closing"} />,
584 |     document.getElementById('closing-query')
585 | );
586 | 
587 | React.render(
588 |     <QueryExampleContainer initialQuery={"facebook"} />,
589 |     document.getElementById('facebook-query')
590 | );
591 | 
592 | 


--------------------------------------------------------------------------------
/client/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "lending-relay",
 3 |   "version": "0.0.1",
 4 |   "description": "I can't wait for graphql + relay, so here is a shitty version",
 5 |   "main": "index.js",
 6 |   "scripts": {
 7 |     "watch": "watchify -t [ reactify --es6 --target es5 ] app/index.js -o ../resources/public/www/js/bundle.js --verbose",
 8 |     "build": "browserify -t [ reactify --es6 --target es5 ] app/index.js -o ../resources/public/www/js/bundle.js"
 9 |   },
10 |   "author": "",
11 |   "license": "ISC",
12 |   "dependencies": {
13 |     "browserify": "^8.1.2",
14 |     "es6-promise": "^2.0.1",
15 |     "immutable": "^3.6.2",
16 |     "install": "^0.1.8",
17 |     "npm": "^2.4.1",
18 |     "object-assign": "^2.0.0",
19 |     "react": "^0.12.2",
20 |     "reactify": "^1.0.0",
21 |     "watchify": "^2.3.0"
22 |   }
23 | }
24 | 


--------------------------------------------------------------------------------
/project.clj:
--------------------------------------------------------------------------------
 1 | (defproject huql "0.1.0-SNAPSHOT"
 2 |   :description "FIXME: write description"
 3 |   :url "http://example.com/FIXME"
 4 |   :license {:name "Eclipse Public License"
 5 |             :url "http://www.eclipse.org/legal/epl-v10.html"}
 6 |   :dependencies [[org.clojure/clojure "1.7.0-alpha5"]
 7 |                  [ring "1.3.2"]
 8 |                  [compojure "1.3.1"]
 9 |                  [cheshire "5.4.0"]
10 |                  [org.clojure/core.cache "0.6.4"]
11 |                  [clj-http "1.0.1"]
12 |                  [prismatic/schema "0.3.7"]
13 |                  [prismatic/plumbing "0.3.7"]
14 |                  [manifold "0.1.0-SNAPSHOT"]
15 |                  [aleph "0.4.0-beta3"]
16 |                  [instaparse "1.3.5"]
17 |                  [clj-time "0.9.0"]
18 |                  [environ "1.0.0"]
19 |                  [org.clojure/core.async "0.1.346.0-17112a-alpha"]]
20 |   :min-lein-version "2.0.0"
21 |   :main huql.core
22 |   :plugins [[lein-environ "1.0.0"]])
23 | 


--------------------------------------------------------------------------------
/resources/public/www/index.html:
--------------------------------------------------------------------------------
  1 | <!DOCTYPE html>
  2 | <html>
  3 | <head>
  4 | 	<style>
  5 | 		* {
  6 | 			padding: 0;
  7 | 			margin: 0;
  8 | 		}
  9 | 
 10 | 		body {
 11 | 			font-family: Helvetica, Arial, sans-serif;
 12 | 			font-size: 20px;
 13 | 			font-weight: 100;
 14 | 			line-height: 1.4285;
 15 | 		}
 16 | 
 17 | 		header {
 18 | 			text-align: center;
 19 | 		}
 20 | 
 21 | 		button {
 22 | 			font-size: 16px;
 23 | 			line-height: 1.4285;
 24 | 			display: inline-block;
 25 | 			padding: 6px 12px;
 26 | 			text-align: center;
 27 | 			border: 1px solid transparent;
 28 | 			border-radius: 4px;
 29 | 
 30 | 			background-color: #fff;
 31 | 			color: #333;
 32 | 			border-color: #ccc;
 33 | 		}
 34 | 
 35 | 		button:active, button:focus, button:hover {
 36 | 			color: #333;
 37 | 			background-color: #e6e6e6;
 38 | 			border-color: #adadad;
 39 | 
 40 | 			outline: none;
 41 | 		}
 42 | 
 43 | 		pre {
 44 | 			margin-top: 5px;
 45 | 			background-color: ghostwhite;
 46 | 			border: 1px solid silver;
 47 | 			padding: 10px 20px;
 48 | 		}
 49 | 
 50 | 		.json-key {
 51 | 			color: brown;
 52 | 		}
 53 | 
 54 | 		.json-value {
 55 | 			color: navy;
 56 | 		}
 57 | 
 58 | 		.json-string {
 59 | 			color: olive;
 60 | 		}
 61 | 
 62 | 		svg {
 63 | 			display: block;
 64 | 			fill: white;
 65 | 		}
 66 | 
 67 | 		svg text {
 68 | 			font: 10px sans-serif;
 69 | 			text-anchor: end;
 70 | 			text-anchor: start;
 71 | 			fill: black;
 72 | 		}
 73 | 
 74 | 		svg rect.end {
 75 | 			fill: steelblue;
 76 | 			opacity: 0.25;
 77 | 		}
 78 | 
 79 | 		svg rect.execute {
 80 | 			fill: steelblue;
 81 | 		}
 82 | 
 83 | 		.axis text {
 84 | 			font: 10px sans-serif;
 85 | 		}
 86 | 
 87 | 		.axis path,
 88 | 		.axis line {
 89 | 			fill: none;
 90 | 			stroke: #000;
 91 | 			shape-rendering: crispEdges;
 92 | 		}
 93 | 
 94 | 		header {
 95 | 			padding: 50px 0;
 96 | 			background-color: #323330;
 97 | 		}
 98 | 
 99 | 		header h1 {
100 | 			font-size: 64px;
101 | 			font-weight: 600;
102 | 			color: #CCFFFF;
103 | 		}
104 | 
105 | 		header h3.disclaimer {
106 | 			font-size: 16px;
107 | 			font-style: italic;
108 | 			font-weight: 100;
109 | 			color: #FFF;
110 | 		}
111 | 
112 | 		#content {
113 | 			margin: 50px 0;
114 | 		}
115 | 
116 | 		#content > p {
117 | 			margin: 15px auto;
118 | 			width: 960px;
119 | 		}
120 | 
121 | 		#content > p strong {
122 | 			margin: 15px auto;
123 | 			width: 960px;
124 | 			font-weight: 600;
125 | 		}
126 | 
127 | 		#content > h3 {
128 | 			margin: 20px auto;
129 | 			width: 960px;
130 | 		}
131 | 
132 | 		#content > p a {
133 | 			color: #FF8000;
134 | 		}
135 | 
136 | 		.query-container {
137 |             display: -webkit-flex;
138 |             -webkit-flex-direction: row;
139 | 
140 |             display: flex;
141 |             flex-direction: row;
142 | 
143 | 		}
144 | 
145 | 		.query-container > div {
146 | 			box-sizing: border-box;
147 | 			padding: 10px;
148 | 		}
149 | 
150 | 		.col33 {
151 | 			width: 33%;
152 | 		}
153 | 
154 | 		.col67 {
155 | 			width: 67%;
156 | 		}
157 | 
158 | 		.query-editor h4 {
159 | 			display: inline-block;
160 | 			padding: 6px 0;
161 | 			font-size: 16px;
162 | 			font-weight: 400;
163 | 		}
164 | 
165 | 		.query-editor button {
166 | 			float: right;
167 | 		}
168 | 
169 | 		.query-editor textarea {
170 | 			margin-top: 5px;
171 | 			width: 100%;
172 | 			height: 400px;
173 | 			font-size: 18px;
174 | 			font-family: monospace;
175 | 		}
176 | 
177 | 		.result-container pre {
178 | 			height: 380px;
179 | 			font-size: 18px;
180 | 			overflow-x: hidden;
181 | 			overflow-y: scroll;
182 | 		}
183 | 
184 | 		.result-container button {
185 | 			margin-right: 5px;
186 | 		}
187 | 
188 | 		.profile-view {
189 | 			height: 400px;
190 | 			overflow: scroll;
191 | 		}
192 | 
193 | 		.error-view {
194 | 			padding: 5px;
195 | 			color: red;
196 | 		}
197 | 
198 | 
199 | 	</style>
200 | </head>
201 | <body>
202 | 	<header>
203 | 		<h1>GithubQL *</h1>
204 | 		<h3 class="disclaimer">* not affiliated with Github or GraphQL in any way, shape, or form.</h3>
205 | 	</header>
206 | 
207 | 	<div id="content">
208 | 
209 | 		<p>Inspired by <strong>GraphQL</strong> and making use of the wonderful <strong>Github API</strong> I decided to take a stab implementing a portion of the as-of-yet unreleased GraphQL specification.  This is a query only API and maps to just a subset of Github entities &mdash; namely Users, Organizations, Repositories, and Commits.</p>
210 | 
211 | 		<p>The server is written in Clojure and the source code can be found <a href="https://github.com/eyston/hueyql">here</a>, although it is in no condition to be used for anything other than a good laugh.</p>
212 | 
213 | 		<p>This has been a blast to write and I want to thank the GraphQL team at Facebook for being so open and helpful.  I can't wait until GraphQL and Relay are out in the world.  API's will get cleaner (no more clientside concerns leaking in) and declarative data requirements will be a boon to both productivity and quality.</p>
214 | 
215 | 		<p>You can drop me a jingle on twitter <a href="https://twitter.com/hueypetersen">@hueypetersen</a> or read a few posts I've done while making this on <a href="http://hueypetersen.com">my blog</a> (although I haven't written about this yet).</p>
216 | 
217 | 		<h3>Simple Queries</h3>
218 | 
219 | 		<p>The simplest query is a single entity with some immediate properties.  Here we are using the Repository root with an id of `facebook/react` and getting just the basic information.</p>
220 | 
221 | 		<div id="simple-query"></div>
222 | 
223 | 		<h3>Nested Results</h3>
224 | 
225 | 		<p>Nested relationships can also be queried.  For example Github Repositories have an Owner which we can include in the query.  This query does not auto-run, click on `RUN` to execute the query.</p>
226 | 
227 | 		<div id="nested-query"></div>
228 | 
229 | 		<p>We don't have to stop at a single nested relationship, we can also look at the Repository's Organization in the same query.</p>
230 | 
231 | 		<div id="nested-mult-query"></div>
232 | 
233 | 		<p>Finally, nested objects don't have to be limited to relations.  We can represent a datetime as a nested object even though it is just a string in the Github API.</p>
234 | 
235 | 		<div id="date-query"></div>
236 | 
237 | 		<h3>Nested Collections</h3>
238 | 
239 | 		<p>So far I've only shown one to many relations.  We can also query related collections.  For example we can look at some of the contributors to the React Repository.</p>
240 | 
241 | 		<div id="collection-query"></div>
242 | 
243 | 		<p>In the query for collections we are able to get the count as well as a collection of nodes &mdash; in this case corresponding to a User entity.  We also specify that we only want the first 10.  This is not necessary but if left off we'd get back all contributors which is probably not desirable.  For the purposes of this demo I've also limited the server to returning 50-100 items at max from a collection.  A cursor was also included which can be used for paging (shown later).<p>
244 | 
245 | 		<p>It might also be interesting to look at the profile tab for this query.  Click on the `PROFILE` button to view timing information for the query.  Each piece of data in the query result has timing information associated with it.  The dark blue bar is how long that particular item took to `execute` while the light blue bar is how long it took the full value &mdash; including children &mdash; to evaluate.<p>
246 | 
247 | 		<p>Note that every contributor was fetched in parallel.  I am using <a href="https://github.com/ztellman/aleph">Aleph</a> for the HTTP library as well as <a href="https://github.com/ztellman/manifold">Manifold</a> for the query execution (thank you Zach Tellman).  These are two non-blocking API's for Clojure.  Collections are represented as streams and individual items in the stream as deferreds.  This means nothing in execution is blocking and the query can be traversed in parallel.<p>
248 | 
249 | 		<p>Go ahead and bump the number up from 10 to something higher if you'd like.  I have no idea what my rate limiting is for Github but so far have yet to hit it while developing and I've made some terrible, terrible mistakes.</p>
250 | 
251 | 		<h3>Pagination</h3>
252 | 
253 | 		<p>For pagination all that we have to do is grab a cursor and include an `after` call on the contributors.  In GraphQL cursors are opaque objects so can include all kind of smart information to improve pagination.  For my purposes they are dumb ids and we always start at page 1 and just drop until we find the cursor.  So ya ... room for improvement!</p>
254 | 
255 | 		<div id="pagination-query"></div>
256 | 
257 | 		<p>Relay is supposed to make this even easier.  Simply change your `first` count and the proper `after` is created.  Have I mentioned I can't wait?</p>
258 | 
259 | 		<h3>Custom Calls</h3>
260 | 
261 | 		<p>So `first` and `after` are just two examples of calls but each collection can export other calls for use.  For instance Facebook has a call roughly like `birthday_in_range(date1, date2)` which I would presume returns friends with birthdays in the date range given.  I haven't spent much time on this but did create a `starts_with` call as a proof of concept.  This will also introduce the Organization root which does what you might expect.
262 | 
263 | 		<div id="starts-with-query"></div>
264 | 
265 | 		<p>For the curious in the crowd I've implemented calls as transducers.  So as you chain calls they get `comp`d into a single transducer and passed to Manifold to transform the stream.  Right now calls are also order dependent.  Whether these are good ideas is something the people writing the GraphQL spec will answer for me :).<p>
266 | 
267 | 		<h3>Field Arguments</h3>
268 | 
269 | 		<p>Another feature of GraphQL is supplying arguments to a field.  I'm actually not sure if this is implemented the same as a call or not &mdash; again the spec will answer this.  I've implemented them differently than calls.  The only example I have of this is providing a date format string to a date object.</p>
270 | 
271 | 		<div id="date-format-query"></div>
272 | 
273 | 		<p>As trivial of an example as this is I actually think it is pretty useful.  I would use this.</p>
274 | 
275 | 		<h3>Multiple Root Values</h3>
276 | 
277 | 		<p>Everything so far has been a single root value, but we can also request multiple ids at once.</p>
278 | 
279 | 		<div id="multiple-users-query"></div>
280 | 
281 | 		<p>Here we are getting back information on multiple Users as well as their Organizations and Repositories.  This is another fun one to look at the profile graph for.<p>
282 | 
283 | 		<p>I've implemented this as two separate roots &mdash; User and Users.  I'm interested how this ends up working in Relay with a single client side store.</p>
284 | 
285 | 		<h3>Identity Roots</h3>
286 | 
287 | 		<p>Not all roots need to be parameterized.  For example Facebook has one called Viewer which corresponds to the current user.  I don't have a similar usecase but for giggles I made a Facebook root which corresponds to the Facebook Organization.</p>
288 | 
289 | 		<div id="facebook-query"></div>
290 | 
291 | 		<p>It is identical in structure to a query result from `Organization(facebook)`.</p>
292 | 
293 | 		<h3>Type Inspection</h3>
294 | 
295 | 		<p>GraphQL also supports inspecting objects.  When you define an object you can specify a description, the fields, a description of each field, etc.  I don't support descriptions (well I do, I just don't have any because /effort) but we can still inspect type and field information.</p>
296 | 
297 | 		<div id="type-query"></div>
298 | 
299 | 		<p>This type of schema documentation allows tools to be built up around GraphQL.  Nifty.</p>
300 | 
301 | 		<h3>Validation</h3>
302 | 
303 | 		<p>Each query gets validated before it is executed.  The code that does this is by far my most hated part of the project, but it does produce reasonable error messages.</p>
304 | 
305 | 		<div id="validation-query"></div>
306 | 
307 | 		<p>All bets are off for execution runtime exceptions :)</p>
308 | 
309 | 		<h3>Conclusion</h3>
310 | 
311 | 		<p>This wraps up the tour of my little implemenation.  Thanks again to the GraphQL team.  I seriously can't wait to get my hands on the real stuff.</p>
312 | 
313 | 		<p>I leave you with a query which should without a doubt kill my rate limit.  Enjoy!</p>
314 | 
315 | 		<div id="closing-query"></div>
316 | 
317 | 	</div>
318 | 
319 | 	<script src="/js/d3.min.js"></script>
320 | 	<script src="/js/bundle.js"></script>
321 | </body>
322 | </html>


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--------------------------------------------------------------------------------
/src/huql/core.clj:
--------------------------------------------------------------------------------
 1 | (ns huql.core
 2 |   (:require [huql.graph.core :as graph]
 3 |             [huql.graph.github :as gh]
 4 |             [ring.adapter.jetty :refer [run-jetty]]
 5 |             [ring.util.response :as resp]
 6 |             [ring.middleware.params :refer [wrap-params]]
 7 |             [ring.middleware.stacktrace :refer [wrap-stacktrace]]
 8 |             [compojure.core :refer :all]
 9 |             [compojure.route :as route]
10 |             [cheshire.core :as json]
11 |             [manifold.deferred :as d]
12 |             [clojure.core.cache :as cache])
13 |   (:gen-class))
14 | 
15 | (defonce CACHE (atom (cache/ttl-cache-factory {} :ttl 60000)))
16 | 
17 | (defroutes app
18 |   (GET "/" [] (resp/resource-response "index.html" {:root "public/www"}))
19 |   (GET "/api/graph" [query] (try
20 |                               ;; lol
21 |                               (let [result (get (swap! CACHE (fn [c]
22 |                                                                (if (cache/has? c query)
23 |                                                                  (cache/hit c query)
24 |                                                                  (cache/miss c query (d/chain (graph/run-profiled :profile-data gh/github-graph query)
25 |                                                                                               (fn [result]
26 |                                                                                                 (update-in result [:profile-data] (partial mapv (fn [[k v]]
27 |                                                                                                                                                   (let [parent (vec (butlast k))
28 |                                                                                                                                                         parent (if (integer? (last parent))
29 |                                                                                                                                                                  (vec (butlast parent))
30 |                                                                                                                                                                  parent)]
31 |                                                                                                                                                     (assoc v
32 |                                                                                                                                                            :path (pr-str k)
33 |                                                                                                                                                            :parent (pr-str parent))))))))))))
34 |                                                 query)]
35 |                                 (resp/response (json/generate-string @result)))
36 |                               (catch Exception e {:status 500
37 |                                                   :body (json/generate-string {:error (.getMessage e)})})))
38 |   (route/resources "/" {:root "/public/www/"})
39 |   (route/not-found "not found"))
40 | 
41 | (comment
42 |   (def server (atom nil))
43 | 
44 |   (swap! server (fn [server]
45 |                   (when server
46 |                     (.stop server))
47 |                   (run-jetty (-> app wrap-params) {:port (Integer. (or (System/getenv "PORT") "8080")) :join? false})))
48 | 
49 |   (swap! server (fn [server]
50 |                   (when server
51 |                     (.stop server))))
52 |   )
53 | 
54 | (defn start []
55 |   (run-jetty (-> app wrap-params) {:port (Integer. (or (System/getenv "PORT") "8080")) :join? false}))
56 | 
57 | (defn -main []
58 |   (start))
59 | 


--------------------------------------------------------------------------------
/src/huql/github/client.clj:
--------------------------------------------------------------------------------
  1 | (ns huql.github.client
  2 |   (:require [clj-http.links :as links]
  3 |             [aleph.http :as http]
  4 |             [byte-streams :as bs]
  5 |             [cheshire.core :as json]
  6 |             [manifold.deferred :as d]
  7 |             [manifold.stream :as s]
  8 |             [environ.core :refer [env]]
  9 |             [clojure.core.async :as async :refer [chan go-loop go >! <! close!]]))
 10 | 
 11 | (def LIMIT 100)
 12 | 
 13 | (defn- deep-merge [& vals]
 14 |   (if (every? map? vals)
 15 |     (apply merge-with deep-merge vals)
 16 |     (last vals)))
 17 | 
 18 | ;; via https://github.com/dakrone/clj-http/blob/master/src/clj_http/links.clj -- just added let-flow
 19 | (defn- wrap-links
 20 |   [client]
 21 |   (fn [request]
 22 |     (d/let-flow [response (client request)]
 23 |                 (if-let [link-headers (get-in response [:headers "link"])]
 24 |                   (let [link-headers (if (coll? link-headers)
 25 |                                        link-headers
 26 |                                        [link-headers])]
 27 |                     (assoc response
 28 |                            :links
 29 |                            (apply merge (for [link-header link-headers]
 30 |                                           (links/read-link-headers link-header)))))
 31 |                   response))))
 32 | 
 33 | (defn- bytes->json [bs]
 34 |   (-> bs
 35 |     bs/to-string
 36 |     (json/parse-string true)))
 37 | 
 38 | (defn http-get
 39 |   ([url]
 40 |    (http-get url nil))
 41 |   ([url options]
 42 |    (prn [:get url options])
 43 |    (let [options (deep-merge options {:middleware wrap-links
 44 |                                       :headers {"User-Agent" "HuQL"}
 45 |                                       :query-params {"client_id" (env :github-client-id)
 46 |                                                      "client_secret" (env :github-client-secret)}})]
 47 |      
 48 |      (d/chain (http/get url options)
 49 |               (fn [x]
 50 |                 (update-in x [:body] bytes->json))))))
 51 | 
 52 | (defn resource [url]
 53 |   (d/chain (http-get url)
 54 |            :body))
 55 | 
 56 | (defn deferred->chan [d]
 57 |   (let [c (chan)]
 58 |     (-> d
 59 |       (d/chain (fn [x] (go (>! c x))))
 60 |       (d/catch (fn [e] (go (>! c e)))))
 61 |     c))
 62 | 
 63 | (defn paged-resources
 64 |   ([url]
 65 |    (paged-resources url 1))
 66 |   ([url page]
 67 |    (let [out (chan)]
 68 |      (go-loop [page page]
 69 |        (let [response (<! (deferred->chan (http-get url {:query-params {"page" page}})))
 70 |              resources (:body response)]
 71 |          (if (seq resources)
 72 |            (let [paged-resources (map (fn [r] {:resource r :page page}) resources)]
 73 |              (<! (async/onto-chan out paged-resources false))
 74 |              (recur (inc page)))
 75 |            (close! out))))
 76 |      (async/pipe out (chan 1 (take LIMIT))))))
 77 | 
 78 | ;;;; stream version -- eager fetches a few pages
 79 | ;;;; I like this version better but worried about API rate limiting atm!
 80 | ;; (defn paged-resources
 81 | ;;   ([url]
 82 | ;;    (paged-resources url 1))
 83 | ;;   ([url page]
 84 | ;;    (->> (iterate inc page)
 85 | ;;      (map (fn [page]
 86 | ;;             (d/chain (http-get url {:query-params {"page" page}})
 87 | ;;                      :body)))
 88 | ;;      s/->source
 89 | ;;      s/realize-each
 90 | ;;      (s/map s/->source)
 91 | ;;      s/concat
 92 | ;;      (s/transform (take LIMIT)))))
 93 | 
 94 | (defn resources
 95 |   ([url]
 96 |    (resources url 1))
 97 |   ([url page]
 98 |    (async/pipe (paged-resources url page) (chan 1 (map :resource)))))
 99 | 
100 | (defn resources-count [url]
101 |   (d/let-flow [response (http-get url {:query-params {"per_page" 1}})]
102 |               (if-let [last-page (get-in response [:links :last :href])]
103 |                 (or (Integer/parseInt (second (re-find #"[\&\?]page=(\d+)?" last-page)))
104 |                     (count (:body response)))
105 |                 (count (:body response)))))
106 | 


--------------------------------------------------------------------------------
/src/huql/github/core.clj:
--------------------------------------------------------------------------------
  1 | (ns huql.github.core
  2 |   (:require [huql.github.client :as client]
  3 |             [manifold.deferred :as d]
  4 |             [manifold.stream :as stream]
  5 |             [clj-time.format :as f]
  6 |             [schema.core :as s]
  7 |             [schema.coerce :as coerce]
  8 |             [schema.macros :as sm]
  9 |             [schema.utils :as su]
 10 |             [clojure.edn :as edn]))
 11 | 
 12 | (def DateTime org.joda.time.DateTime)
 13 | 
 14 | (defn string->datetime [ds]
 15 |   (or (f/parse ds) ds))
 16 | 
 17 | (def coercions (merge coerce/+string-coercions+
 18 |                       {DateTime string->datetime}))
 19 | 
 20 | (defn coercion-matcher [schema]
 21 |   (or (coercions schema)
 22 |       (coerce/keyword-enum-matcher schema)))
 23 | 
 24 | (defn parser [schema]
 25 |   (let [coercer (coerce/coercer schema coercion-matcher)]
 26 |     (fn [value]
 27 |       (if (nil? value) ;; let nils skip validation
 28 |         value
 29 |         (let [result (coercer value)]
 30 |           (if (su/error? result)
 31 |             (sm/error! (su/format* "Value does not match schema: %s" (pr-str result))
 32 |                        {:schema schema :value value :error result})
 33 |             result))))))
 34 | 
 35 | ;;; COMMIT
 36 | 
 37 | (def CommitSchema
 38 |   {(s/optional-key :commit) {(s/optional-key :author) {(s/optional-key :date) (s/maybe DateTime)
 39 |                                                        s/Any s/Any}
 40 |                              (s/optional-key :committer) {(s/optional-key :date) (s/maybe DateTime)
 41 |                                                           s/Any s/Any}
 42 |                              s/Any s/Any}
 43 |    s/Any s/Any})
 44 | 
 45 | (def commit-parser (parser CommitSchema))
 46 | 
 47 | (defn url->commit [url]
 48 |   (d/chain (client/resource url)
 49 |            commit-parser))
 50 | 
 51 | ;;; USER
 52 | 
 53 | (def UserSchema
 54 |   {(s/optional-key :created_at) (s/maybe DateTime)
 55 |    (s/optional-key :updated_at) (s/maybe DateTime)
 56 |    s/Any s/Any})
 57 | 
 58 | (def user-parser (parser UserSchema))
 59 | 
 60 | 
 61 | (defn url->user [url]
 62 |   (d/chain (client/resource url)
 63 |            user-parser))
 64 | 
 65 | (defn login->user [login]
 66 |   (url->user (str "https://api.github.com/users/" login)))
 67 | 
 68 | ;;; ORGANIZATION
 69 | 
 70 | (def OrganizationSchema
 71 |   {(s/optional-key :created_at) (s/maybe DateTime)
 72 |    (s/optional-key :updated_at) (s/maybe DateTime)
 73 |    s/Any s/Any})
 74 | 
 75 | (def organization-parser (parser OrganizationSchema))
 76 | 
 77 | (defn url->organization [url]
 78 |   (d/chain (client/resource url)
 79 |            organization-parser))
 80 | 
 81 | (defn name->organization [name]
 82 |   (url->organization (str "https://api.github.com/orgs/" name)))
 83 | 
 84 | 
 85 | ;;; REPOSITORY
 86 | 
 87 | (def RepositorySchema
 88 |   {(s/optional-key :created_at) (s/maybe DateTime)
 89 |    (s/optional-key :updated_at) (s/maybe DateTime)
 90 |    (s/optional-key :pushed_at) (s/maybe DateTime)
 91 |    s/Any s/Any})
 92 | 
 93 | (def repository-parser (parser RepositorySchema))
 94 | 
 95 | (defn url->repository [url]
 96 |   (d/chain (client/resource url)
 97 |            repository-parser))
 98 | 
 99 | (defn full-name->repository [full-name]
100 |   (url->repository (str "https://api.github.com/repos/" full-name)))
101 | 
102 | 
103 | 


--------------------------------------------------------------------------------
/src/huql/graph/core.clj:
--------------------------------------------------------------------------------
  1 | (ns huql.graph.core
  2 |   (:require [schema.core :as s]
  3 |             [schema.coerce :as coerce]
  4 |             [manifold.deferred :as d]
  5 |             [manifold.stream :as stream]
  6 |             [huql.github.core :as gh]
  7 |             [huql.github.client :as client]
  8 |             [huql.graph.query :as query]
  9 |             [clj-time.format :as f]
 10 |             [clj-time.core :as t]
 11 |             [clojure.edn :as edn])
 12 |   (:refer-clojure :exclude [key compile type]))
 13 | 
 14 | (defn scalar [name parse]
 15 |   [{:graph/type :type
 16 |     :type/type :scalar
 17 |     :name name
 18 |     :parse parse}])
 19 | 
 20 | (defn type [name & args]
 21 |   (let [fields (filter (comp (partial = :field) first) args)
 22 |         calls (filter (comp (partial = :call) first) args)
 23 |         calls (into {} (map (fn [[_ name args]] [name {:name name
 24 |                                                        :args args}]) calls))]
 25 |     (vec (concat [(merge {:graph/type :type
 26 |                           :type/type :complex
 27 |                           :name name}
 28 |                          ;; TODO: make calls a top level graph construct like fields perhaps, e.g. (get-in graph [:calls 'Repositories])
 29 |                          (when (seq calls) {:calls calls}))
 30 |                   {:graph/type :field
 31 |                    :field/type :descriptor
 32 |                    :name :__type__
 33 |                    :type 'TypeDescriptor
 34 |                    :source name}]
 35 |                  (mapv (fn [[_ fname type executor & opts]]
 36 |                          (let [opts (when opts (apply assoc (conj opts {})))]
 37 |                            (merge {:graph/type :field
 38 |                                    :field/type :property
 39 |                                    :name fname
 40 |                                    :type type
 41 |                                    :source name
 42 |                                    :executor executor
 43 |                                    :cardinality :one}
 44 |                                   opts)))
 45 |                        fields)))))
 46 | 
 47 | (defn root [name type executor root-type & [id]]
 48 |   [(merge {:graph/type :root
 49 |            :root/type root-type
 50 |            :name name
 51 |            :type type
 52 |            :executor executor
 53 |            :cardinality :one}
 54 |           (when id {:id id}))])
 55 | 
 56 | (def FieldDescriptor
 57 |   (type 'FieldDescriptor
 58 |         [:field :name 'string :name]
 59 |         [:field :description 'string :description]
 60 |         [:field :type 'string :type]))
 61 | 
 62 | (def TypeDescriptor
 63 |   (type 'TypeDescriptor
 64 |         [:field :name 'string :name]
 65 |         [:field :description 'string :description]
 66 |         [:field :fields 'FieldDescriptor :fields
 67 |          :cardinality :many]))
 68 | 
 69 | (defn insert [graph items]
 70 |   (reduce (fn [graph item]
 71 |             (condp = (:graph/type item)
 72 |               :root (assoc-in graph [:roots (:name item)] item)
 73 |               :type (assoc-in graph [:types (:name item)] item)
 74 |               :field (assoc-in graph [:fields (:source item) (:name item)] item)))
 75 |           graph
 76 |           items))
 77 | 
 78 | (def base-graph (-> {}
 79 |                   ;; add scalars as needed
 80 |                   (insert (scalar 'string identity))
 81 |                   (insert (scalar 'integer (fn [s]
 82 |                                              (let [i (edn/read-string s)]
 83 |                                                (if (integer? i)
 84 |                                                  i
 85 |                                                  (throw (Exception. "not an integer")))))))
 86 |                   (insert (scalar 'boolean identity)) ;; todo: make parser yo
 87 |                   
 88 |                   ;; for schema descriptions
 89 |                   (insert FieldDescriptor)
 90 |                   (insert TypeDescriptor)))
 91 | 
 92 | (defn ->graph [& items]
 93 |   ;; todo: add validation after inserts that this graph is legit
 94 |   ;; - scalars have no fields
 95 |   ;; - complex do
 96 |   ;; - field / root types exist
 97 |   ;; - etc ...
 98 |   (insert base-graph (mapcat identity items)))
 99 | 
100 | (defprotocol Executable
101 |   (execute [this value])
102 |   (cardinality [this])
103 |   ;; not sure about these!
104 |   (key [this]) ;; root kind of doesn't want this ...
105 |   (fields [this])) ;; they all need this, but not really to do with being executable
106 | 
107 | (defrecord ExecutableRoot [root id fields]
108 |   Executable
109 |   (execute [_ _]
110 |     ((:executor root) id))
111 |   (cardinality [_] (:cardinality root))
112 |   (key [_] id)
113 |   (fields [_] fields))
114 | 
115 | (defrecord ExecutableField [field query fields]
116 |   Executable
117 |   (execute [_ value]
118 |     (let [args (concat [value] (:args query) (:calls query))]
119 |       (apply (:executor field) args)))
120 |   (cardinality [_] (:cardinality field))
121 |   (key [_] (or (:alias query) (:name query)))
122 |   (fields [_] fields))
123 | 
124 | (defrecord ExecutableTypeDescriptor [graph field query fields]
125 |   Executable
126 |   (execute [_ _]
127 |     (let [type (get-in graph [:types (:source field)])
128 |           fields (vals (get-in graph [:fields (:source field)]))]
129 |       (assoc type :fields fields)))
130 |   (cardinality [_] :one)
131 |   (key [_] (or (:alias query) (:name query)))
132 |   (fields [_] fields))
133 | 
134 | 
135 | (defn compile
136 |   ([graph query]
137 |    (let [root (get-in graph [:roots (:name query)])]
138 |      (compile graph query root)))
139 |   ([graph query field]
140 |    (let [fields (mapv (fn [query]
141 |                         (let [field (get-in graph [:fields (:type field) (:name query)])]
142 |                           (compile graph query field)))
143 |                       (:fields query))]
144 |      (condp = (:graph/type field)
145 |        ;; replace with multimethod mebe -- a compile per graph/type sub/type
146 |        ;; e.g. [:root :one], [:root :ident], [:field :property], etc
147 |        ;; would allow extending types
148 |        ;; validate could also be this same pattern
149 |        :root (let [root-type (:root/type field)]
150 |                (cond
151 |                  (= :ident root-type) [(->ExecutableRoot field (:name field) fields)]
152 |                  (or (= :one root-type)
153 |                      (= :many root-type)) (mapv (fn [id]
154 |                                                   (->ExecutableRoot field id fields))
155 |                                                 (:ids query))))
156 |        :field (condp = (:field/type field)
157 |                 :property (->ExecutableField field query fields)
158 |                 :descriptor (->ExecutableTypeDescriptor graph field query fields))))))
159 | 
160 | (defn async-execute [field value]
161 |   (let [result (execute field value)]
162 |     ;; coerce to manifold friendly yo
163 |     (condp = (cardinality field)
164 |       :one (d/chain result)
165 |       :many (stream/->source result))))
166 | 
167 | (defn async-walker' [f field path value]
168 |   (d/let-flow [value value]
169 |               (if (and (seq (fields field)) (not (nil? value)))
170 |                 (d/let-flow [kvs (apply d/zip (map (fn [field]
171 |                                                      (d/let-flow [value (f value (conj path (key field)) field)]
172 |                                                                  [(key field) value]))
173 |                                                    (fields field)))]
174 |                             (into {} kvs))
175 |                 value)))
176 | 
177 | (defn async-walker [f path field]
178 |   (fn [value]
179 |     (condp = (cardinality field)
180 |       :one (async-walker' f field path value)
181 |       :many (->> (stream/->source value)
182 |               (stream/transform (comp (map-indexed (fn [idx value]
183 |                                                      (async-walker' f field (conj path idx) value)))))
184 |               (stream/buffer 50) ;; we need to buffer results so it does not wait for deferreds to resolve to do next
185 |               (stream/realize-each) ;; reduce seems to do this but wutevs
186 |               (stream/reduce conj [])))))
187 | 
188 | ;; walk maybe part of protocol? only really different for roots vs fields and then just barely
189 | (defn walk
190 |   ([executor roots]
191 |    (d/let-flow [kvs (apply d/zip
192 |                            (map (fn [root]
193 |                                   (d/let-flow [value (walk executor nil [(key root)] root)]
194 |                                               [(key root) value]))
195 |                                 roots))]
196 |                (into {} kvs)))
197 |   ([executor value path field]
198 |    (let [walker (async-walker (partial walk executor) path field)]
199 |      (executor walker value path field))))
200 | 
201 | (defn executor [w value path field]
202 |   (let [value (async-execute field value)]
203 |     (w value)))
204 | 
205 | ;; throws on errors
206 | (defn string->compiled [graph query-string]
207 |   (->> query-string
208 |     query/parse
209 |     (query/validate graph)
210 |     (compile graph)))
211 | 
212 | (defn run [graph query-string]
213 |   (let [query (string->compiled graph query-string)]
214 |     (walk executor query)))
215 | 
216 | (defn profiled-executor [pd]
217 |   (let [base (System/nanoTime)]
218 |     (fn [w value path field]
219 |       (swap! pd assoc-in [path :start] (/ (- (System/nanoTime) base) 1000000.0))
220 |       (let [value (async-execute field value)
221 |             result (w value)]
222 |         (condp = (cardinality field)
223 |           :one (d/chain value (fn [value]
224 |                                 (swap! pd assoc-in [path :execute] (/ (- (System/nanoTime) base) 1000000.0))))
225 |           :many (stream/on-drained value (fn []
226 |                                            (swap! pd assoc-in [path :execute] (/ (- (System/nanoTime) base) 1000000.0)))))
227 |         (d/chain result (fn [value]
228 |                           ;; sometimes end resolves before execute so we set if nil
229 |                           (swap! pd update-in [path :execute] #(or % (/ (- (System/nanoTime) base) 1000000.0)))
230 |                           (swap! pd assoc-in [path :end] (/ (- (System/nanoTime) base) 1000000.0))))
231 |         result))))
232 | 
233 | (defn run-profiled [pkey graph query-string]
234 |   (let [query (string->compiled graph query-string)
235 |         profile-data (atom {})
236 |         executor (profiled-executor profile-data)]
237 |     (d/chain (walk executor query)
238 |              #(assoc % pkey @profile-data))))
239 | 


--------------------------------------------------------------------------------
/src/huql/graph/github.clj:
--------------------------------------------------------------------------------
  1 | (ns huql.graph.github
  2 |   (:require [huql.github.core :as gh]
  3 |             [huql.github.client :as client]
  4 |             [huql.graph.core :as graph]
  5 |             [huql.graph.query :as query]
  6 |             [clj-time.format :as f]
  7 |             [clj-time.core :as t]
  8 |             [manifold.stream :as stream]))
  9 | 
 10 | ;; helpers for github graph
 11 | 
 12 | (defn first-call [count]
 13 |   (take count))
 14 | 
 15 | (defn after-call [accessor]
 16 |   (fn [cursor]
 17 |     (comp (drop-while (fn [item] (not= (accessor item) cursor)))
 18 |           (drop 1))))
 19 | 
 20 | (defn starts-with [accessor]
 21 |   (fn [s]
 22 |     (filter (fn [item] (.startsWith (accessor item) s)))))
 23 | 
 24 | (defn resource-exec [& calls]
 25 |   (let [calls (when calls (apply assoc (conj calls {})))]
 26 |     (fn [rs]
 27 |       (let [resources (stream/->source (client/resources (:url rs)))
 28 |             xf (apply comp (map (fn [call]
 29 |                                   (apply (calls (:name call)) (:args call)))
 30 |                                 (:calls rs)))]
 31 |         (stream/transform xf resources)))))
 32 | 
 33 | (defn base-resource-exec [& calls]
 34 |   (apply resource-exec (concat [:first first-call :after (after-call :id)] calls)))
 35 | 
 36 | (defn resource-relation
 37 |   ([url-key]
 38 |    (resource-relation url-key nil))
 39 |   ([url-key count-key]
 40 |    (fn [parent & calls]
 41 |      (let [url (parent url-key)
 42 |            url (clojure.string/replace url  #"\{.*\}" "")
 43 |            _ (prn [:url url])]
 44 |        (merge {:url url
 45 |                :calls calls}
 46 |               (when count-key
 47 |                 {:count (parent count-key)}))))))
 48 | 
 49 | (defn resource-count-exec [rs]
 50 |   (or (:count rs) (client/resources-count (:url rs))))
 51 | 
 52 | 
 53 | ;;;; Organizations
 54 | 
 55 | (def OrganizationRoot (graph/root :Organization 'Organization gh/name->organization :one 'string))
 56 | 
 57 | (def OrganizationsRoot (graph/root :Organizations 'Organization gh/name->organization :many 'string))
 58 | 
 59 | (def FacebookRoot (graph/root :Facebook 'Organization (fn [_] (gh/name->organization "facebook")) :ident))
 60 | 
 61 | (def OrganizationType (graph/type 'Organization
 62 |                                   [:field :login 'string :login]
 63 |                                   [:field :id 'integer :id]
 64 |                                   [:field :url 'string :url]
 65 |                                   [:field :repositories 'Repositories (resource-relation :repos_url :public_repos)]
 66 |                                   ;; TODO: events_url
 67 |                                   [:field :public_members 'Users (resource-relation :public_members_url)]
 68 |                                   [:field :avatar_url 'string :avatar_url]
 69 |                                   [:field :description 'string :description]
 70 |                                   [:field :name 'string :name]
 71 |                                   [:field :company 'string :company]
 72 |                                   [:field :blog 'string :blog]
 73 |                                   [:field :location 'string :location]
 74 |                                   [:field :email 'string :email]
 75 |                                   [:field :public_gists 'integer :public_gists]
 76 |                                   [:field :followers 'integer :followers]
 77 |                                   [:field :following 'integer :following]
 78 |                                   [:field :html_url 'string :html_url]
 79 |                                   [:field :updated_at 'DateTime :updated_at]
 80 |                                   [:field :created_at 'DateTime :created_at]
 81 |                                   [:field :type 'string :type]))
 82 | 
 83 | (def OrganizationsType (graph/type 'Organizations
 84 |                                    [:call :first ['integer]]
 85 |                                    [:call :after ['integer]]
 86 |                                    [:field :count 'integer resource-count-exec]
 87 |                                    [:field :edges 'OrganizationEdge (base-resource-exec)
 88 |                                     :cardinality :many]))
 89 | 
 90 | (def OrganizationEdgeType (graph/type 'OrganizationEdge
 91 |                                       [:field :cursor 'integer :id]
 92 |                                       [:field :node 'Organization (fn [summary] (gh/url->organization (:url summary)))]))
 93 | 
 94 | 
 95 | ;;;; Repositories
 96 | 
 97 | (def RepositoryRoot (graph/root :Repository 'Repository gh/full-name->repository :one 'string))
 98 | 
 99 | (def RepositoriesRoot (graph/root :Repositories 'Repository gh/full-name->repository :many 'string))
100 | 
101 | (def RepositoryType (graph/type 'Repository
102 |                                 [:field :id 'integer :id]
103 |                                 [:field :name 'string :name]
104 |                                 [:field :full_name 'string :full_name]
105 |                                 [:field :owner 'Owner #(client/resource (get-in % [:owner :url]))]
106 |                                 [:field :private 'boolean :private]
107 |                                 [:field :html_url 'string :html_url]
108 |                                 [:field :description 'string :description]
109 |                                 [:field :fork 'boolean :fork]
110 |                                 [:field :url 'string :url]
111 |                                 [:field :forks 'Repositories (resource-relation :forks_url :forks_count)]
112 |                                 ;; TODO: keys_url -- no idea what this is
113 |                                 ;; TODO: collaborators_url -- seems to require auth
114 |                                 ;; TODO: teams_url -- auth
115 |                                 ;; TODO: hooks_url -- auth
116 |                                 ;; TODO: issue_events_url
117 |                                 ;; TODO: events_url
118 |                                 [:field :assignees 'Users (resource-relation :assignees_url)]
119 |                                 ;; TODO: branches_url
120 |                                 ;; TODO: tags_url
121 |                                 ;; TODO: blobs_url
122 |                                 ;; TODO: git_tags_url
123 |                                 ;; TODO: git_refs_url
124 |                                 ;; TODO: trees_url
125 |                                 ;; TODO: statuses_url
126 |                                 ;; TODO: languages_url
127 |                                 [:field :stargazers 'Users (resource-relation :stargazers_url :stargazers_count)]
128 |                                 [:field :contributors 'Users (resource-relation :contributors_url)]
129 |                                 [:field :subscribers 'Users (resource-relation :subscribers_url :subscribers_count)]
130 |                                 ;; TODO: subscription_url -- auth?
131 |                                 [:field :commits 'Commits (resource-relation :commits_url)]
132 |                                 ;; TODO: git_commits_url
133 |                                 ;; TODO: comments_url
134 |                                 ;; TODO: issue_comment_url
135 |                                 ;; TODO: conents_url
136 |                                 ;; TODO: compare_url
137 |                                 ;; TODO: merges_url
138 |                                 ;; TODO: archive_url
139 |                                 ;; TODO: downloads_url
140 |                                 ;; TODO: issues_url
141 |                                 ;; TODO: pulls_url
142 |                                 ;; TODO: milestones_url
143 |                                 ;; TODO: notifications_url
144 |                                 ;; TODO: labels_url
145 |                                 ;; TODO: releases_url
146 |                                 [:field :created_at 'DateTime :created_at]
147 |                                 [:field :updated_at 'DateTime :updated_at]
148 |                                 [:field :pushed_at 'DateTime :pushed_at]
149 |                                 [:field :git_url 'string :git_url]
150 |                                 [:field :ssh_url 'string :ssh_url]
151 |                                 [:field :clone_url 'string :clone_url]
152 |                                 [:field :svn_url 'string :svn_url]
153 |                                 [:field :homepage 'string :homepage]
154 |                                 [:field :size 'integer :size]
155 |                                 [:field :watchers 'integer :watchers]
156 |                                 [:field :language 'string :language]
157 |                                 [:field :has_issues 'boolean :has_issues]
158 |                                 [:field :has_downloads 'boolean :has_downloads]
159 |                                 [:field :has_wiki 'boolean :has_wiki]
160 |                                 [:field :has_pages 'boolean :has_pages]
161 |                                 [:field :mirror_url 'string :mirror_url]
162 |                                 [:field :open_issues 'integer :open_issues]
163 |                                 [:field :default_branch 'string :default_branch]
164 |                                 [:field :organization 'User (fn [repo] (gh/url->user (get-in repo [:organization :url])))] ;; is this always a user?
165 |                                 [:field :network_count 'integer :network_count]))
166 | 
167 | (def RepositoriesType (graph/type 'Repositories
168 |                                   [:call :first ['integer]]
169 |                                   [:call :after ['integer]]
170 |                                   [:call :starts_with ['string]]
171 |                                   [:field :count 'integer resource-count-exec]
172 |                                   [:field :edges 'RepositoryEdge (base-resource-exec :starts_with (starts-with :name))
173 |                                    :cardinality :many]))
174 | 
175 | (def RepositoryEdgeType (graph/type 'RepositoryEdge
176 |                                     [:field :cursor 'integer :id]
177 |                                     [:field :node 'Repository (fn [summary] (gh/url->repository (:url summary)))]))
178 | 
179 | 
180 | ;;; User
181 | 
182 | (def UserRoot (graph/root :User 'User gh/login->user :one 'string))
183 | 
184 | (def UsersRoot (graph/root :Users 'User gh/login->user :many 'string))
185 | 
186 | (def UserType (graph/type 'User
187 |                           [:field :login 'string :login]
188 |                           [:field :id 'integer :id]
189 |                           [:field :avatar_url 'string :avatar_url]
190 |                           [:field :gravatar_id 'string :gravatar_id]
191 |                           [:field :url 'string :url]
192 |                           [:field :html_url 'string :html_url]
193 |                           [:field :organizations 'Organizations (resource-relation :organizations_url)]
194 |                           [:field :followers 'Users (resource-relation :followers_url :followers)]
195 |                           [:field :following 'Users (resource-relation :following_url :following)]
196 |                           ;; TODO: gists_url / public_gists
197 |                           [:field :starred 'Repositories (resource-relation :starred_url)]
198 |                           [:field :subscriptions 'Repositories (resource-relation :subscriptions_url)]
199 |                           [:field :repositories 'Repositories (resource-relation :repos_url :public_repos)]
200 |                           ;; TODO: events_url
201 |                           ;; TODO: received_events_url
202 |                           [:field :type 'string :type]
203 |                           [:field :site_admin 'boolean :site_admin]
204 |                           [:field :name 'string :name]
205 |                           [:field :company 'string :company]
206 |                           [:field :blog 'string :blog]
207 |                           [:field :location 'string :location]
208 |                           [:field :email 'string :email]
209 |                           [:field :hireable 'boolean :hireable]
210 |                           [:field :bio 'string :bio]
211 |                           [:field :created_at 'DateTime :created_at]
212 |                           [:field :updated_at 'DateTime :updated_at]))
213 | 
214 | (def UsersType (graph/type 'Users
215 |                            [:call :first ['integer]]
216 |                            [:call :after ['integer]]
217 |                            [:field :count 'integer resource-count-exec]
218 |                            [:field :edges 'UserEdge (base-resource-exec)
219 |                             :cardinality :many]))
220 | 
221 | (def UserEdgeType (graph/type 'UserEdge
222 |                               [:field :cursor 'integer :id]
223 |                               [:field :node 'User (fn [summary] (gh/url->user (:url summary)))]))
224 | 
225 | ;;; Commit
226 | 
227 | (def CommitType (graph/type 'Commit
228 |                             [:field :sha 'string :sha]
229 |                             [:field :html_url 'string :html_url]
230 |                             [:field :message 'string #(get-in % [:commit :message])]
231 |                             [:field :author_date 'DateTime #(get-in % [:commit :author :date])]
232 |                             [:field :commit_date 'DateTime #(get-in % [:commit :committer :date])]
233 |                             ;; TODO: tree
234 |                             ;; TODO: comments_url
235 |                             ;; TODO: parents -- trees?
236 |                             ;; TODO: files
237 |                             [:field :author 'User #(gh/url->user (get-in % [:author :url]))]
238 |                             [:field :committer 'User #(gh/url->user (get-in % [:committer :url]))]
239 |                             [:field :additions 'integer #(get-in % [:stats :additions])]
240 |                             [:field :deletions 'integer #(get-in % [:stats :deletions])]
241 |                             [:field :total 'integer #(get-in % [:stats :total])]))
242 |                             
243 | (def CommitsType (graph/type 'Commits
244 |                              [:call :first ['integer]]
245 |                              [:call :after ['integer]]
246 |                              ;; [:field :count 'integer resource-count-exec] ;; this returns 1 ...
247 |                              [:field :edges 'CommitEdge (base-resource-exec)
248 |                               :cardinality :many]))
249 | 
250 | (def CommitEdgeType (graph/type 'CommitEdge
251 |                                 [:field :cursor 'string :sha]
252 |                                 [:field :node 'Commit (fn [summary] (gh/url->commit (:url summary)))]))
253 | 
254 | ;;; Owner
255 | ;; repos have owners -- either a user / org
256 | 
257 | 
258 | (def OwnerType (graph/type 'Owner
259 |                           [:field :login 'string :login]
260 |                           [:field :id 'integer :id]
261 |                           [:field :avatar_url 'string :avatar_url]
262 |                           [:field :gravatar_id 'string :gravatar_id]
263 |                           [:field :url 'string :url]
264 |                           [:field :html_url 'string :html_url]
265 |                           [:field :followers 'Users (resource-relation :followers_url)]
266 |                           [:field :following 'Users (resource-relation :following_url)]
267 |                           ;; TODO: gists_url / public_gists
268 |                           [:field :starred 'Repositories (resource-relation :starred_url)]
269 |                           [:field :subscriptions 'Repositories (resource-relation :subscriptions_url)]
270 |                           [:field :organizations 'Organizations (resource-relation :organizations_url)]
271 |                           [:field :repositories 'Repositories (resource-relation :repos_url :public_repos)]
272 |                           ;; TODO: events_url
273 |                           ;; TODO: received_events_url
274 |                           [:field :type 'string :type]
275 |                           [:field :site_admin 'boolean :site_admin]))
276 | 
277 | ;;; Issues
278 | 
279 | ;;; Events
280 | 
281 | 
282 | ;;; DateTime
283 | 
284 | (def DateTimeType (graph/type 'DateTime
285 |                               [:field :month 'integer t/month]
286 |                               [:field :year 'string t/year]
287 |                               [:field :day 'string t/day]
288 |                               [:field :format 'string (fn [dt format-string]
289 |                                                         (let [formatter (f/formatter format-string)]
290 |                                                           (f/unparse formatter dt)))
291 |                                :args ['string]]))
292 | 
293 | (def github-graph (graph/->graph
294 |                    OrganizationRoot
295 |                    OrganizationsRoot
296 |                    FacebookRoot
297 |                    OrganizationType
298 |                    OrganizationsType
299 |                    OrganizationEdgeType
300 | 
301 |                    RepositoryRoot
302 |                    RepositoriesRoot
303 |                    RepositoryType
304 |                    RepositoriesType
305 |                    RepositoryEdgeType
306 |                    
307 |                    UserRoot
308 |                    UsersRoot
309 |                    UserType
310 |                    UsersType
311 |                    UserEdgeType
312 | 
313 |                    CommitType
314 |                    CommitsType
315 |                    CommitEdgeType
316 | 
317 |                    OwnerType
318 | 
319 |                    DateTimeType))
320 | 


--------------------------------------------------------------------------------
/src/huql/graph/query.clj:
--------------------------------------------------------------------------------
  1 | (ns huql.graph.query
  2 |   (:require [instaparse.core :as insta]
  3 |             [clojure.set :as set]
  4 |             [clojure.string :refer [join]]))
  5 | 
  6 | (def parser
  7 |   (insta/parser "ROOT = <whitespace> NAME IDS? FIELDS <whitespace>
  8 |                  NAME = token
  9 |                  IDS = <whitespace> <'('> ARG (<','> ARG)* <')'> <whitespace>
 10 |                  ARGS = <whitespace> <'('> ARG (<','> ARG)* <')'> <whitespace>
 11 |                  <ARG> = <whitespace> #'[^,)]+' <whitespace>
 12 |                  FIELDS = <whitespace> <'{'> FIELD (<','> FIELD)* <'}'> <whitespace>
 13 |                  FIELD = <whitespace> NAME(ARGS | CALLS)? <whitespace> (<'as'> <whitespace> ALIAS <whitespace>)? FIELDS? <whitespace>
 14 |                  ALIAS = token
 15 |                  CALLS = CALL+
 16 |                  CALL = <'.'> NAME ARGS
 17 |                  <token> = #'\\w+'
 18 |                  whitespace = #'\\s*'"))
 19 | 
 20 | (def transform
 21 |   (partial insta/transform {:NAME (fn [name] [:name (keyword name)])
 22 |                             :IDS (fn [& args] [:ids (vec args)])
 23 |                             :ARGS (fn [& args] [:args (vec args)])
 24 |                             :ALIAS (fn [alias] [:alias (keyword alias)])
 25 |                             :CALLS (fn [& calls] [:calls (vec calls)])
 26 |                             :CALL (fn [name args] (into {} [name args]))
 27 |                             :FIELDS (fn [& fields] [:fields (vec fields)])
 28 |                             :FIELD (fn [& args] (into {} args))
 29 |                             :ROOT (fn [& args] (into {} args))}))
 30 | 
 31 | (defn parse [string]
 32 |   (-> string
 33 |     parser
 34 |     transform))
 35 | 
 36 | ;; validations -- so fucking long and shitty to read
 37 | 
 38 | (defn name->string [item]
 39 |   (name (:name item)))
 40 | 
 41 | (defn path->string [path]
 42 |   (join "." path))
 43 | 
 44 | (defn parse-scalar [graph field path scalar-name value]
 45 |   (let [scalar (get-in graph [:types scalar-name])]
 46 |     (try
 47 |       ((:parse scalar) value)
 48 |       (catch Exception e
 49 |         (throw (Exception. (str "Invalid argument. " (path->string path) " could not parse '" value "' to type " scalar-name ".")))))))
 50 | 
 51 | (defn parse-arguments [graph field path query]
 52 |   (let [field-args (:args field)
 53 |         query-args (:args query)]
 54 |     (if (seq field-args)
 55 |       (update-in query [:args] (partial mapv (partial parse-scalar graph field path) field-args))
 56 |       query)))
 57 | 
 58 | (defn parse-call-arguments [graph type-call path call]
 59 |   (let [type-args (:args type-call)]
 60 |     (if (seq type-args)
 61 |       (update-in call [:args] (partial mapv (fn [type-arg call-arg]
 62 |                                               (let [scalar (get-in graph [:types type-arg])]
 63 |                                                 (try
 64 |                                                   ((:parse scalar) call-arg)
 65 |                                                   (catch Exception e
 66 |                                                     (throw (Exception. (str "Invalid call argument. " (path->string path) " call " (name->string call) " could not parse '" call-arg "' to type " type-arg ".")))))))
 67 |                                        type-args))
 68 |       call)))
 69 | 
 70 | (defn validate-call-argument-count [type-call path call]
 71 |   (let [type-args (:args type-call)
 72 |         call-args (:args call)]
 73 |     (if (not= (count type-args) (count call-args))
 74 |       (cond
 75 |         (= (count type-args) 0) (throw (Exception. (str "Invalid call arguments. " (path->string path) " call " (name->string call) " takes no arguments but called with: " (join ", " call-args))))
 76 |         (= (count call-args) 0) (throw (Exception. (str "Invalid call arguments. " (path->string path) " call " (name->string call) " takes " (count type-args) " arguments of " (join ", " type-args) " but none were provided.")))
 77 |         :else (throw (Exception. (str "Invalid call arguments. " (path->string path) " call " (name->string call) " takes " (count type-args) " arguments of " (join ", " type-args) " but called with: " (join ", " call-args) "."))))
 78 |       call)))
 79 | 
 80 | (defn validate-call [graph type-calls path call]
 81 |   (if-let [type-call (type-calls (:name call))]
 82 |     (->> call
 83 |       (validate-call-argument-count type-call path)
 84 |       (parse-call-arguments graph type-call path))
 85 |     (throw (Exception. (str "Invalid call. " (path->string path) " call " (name->string call) " is not supported.  Valid calls are: " (join ", " (map name (keys type-calls))) ".")))))
 86 | 
 87 | (defn validate-field-calls [graph field path query]
 88 |   (let [query-calls (:calls query)]
 89 |     (if (seq query-calls)
 90 |       (let [type (get-in graph [:types (:type field)])
 91 |             type-calls (:calls type)]
 92 |         (if (empty? type-calls)
 93 |           (throw (Exception. (str "Invalid call. " (path->string path) " does not accept calls but called with: " (join ", " (map name->string query-calls)) ".")))
 94 |           (update-in query [:calls] (partial mapv (partial validate-call graph type-calls path)))))
 95 |       query)))
 96 | 
 97 | (defn parse-arguments [graph field path query]
 98 |   (let [field-args (:args field)
 99 |         query-args (:args query)]
100 |     (if (seq field-args)
101 |       (update-in query [:args] (partial mapv (partial parse-scalar graph field path) field-args))
102 |       query)))
103 | 
104 | (defn validate-argument-count [graph field path query]
105 |   (let [field-args (:args field)
106 |         query-args (:args query)]
107 |     (if (not= (count field-args) (count query-args))
108 |       (cond
109 |         (= (count field-args) 0) (throw (Exception. (str "Illegal arguments. " (path->string path) " does not take any arguments but called with: " (join ", " query-args) ".")))
110 |         (= (count query-args) 0) (throw (Exception. (str "Illegal arguments. " (path->string path) " requires " (count field-args) " arguments of " (join ", " field-args) " but none were provided.")))
111 |         :else (throw (Exception. (str "Illegal arguments. " (path->string path) " requires " (count field-args) " arguments of " (join ", " field-args) " but was called with " (join ", " query-args) "."))))
112 |       query)))
113 | 
114 | (defn validate-field-arguments [graph field path query]
115 |   (->> query
116 |     (validate-argument-count graph field path)
117 |     (parse-arguments graph field path)))
118 | 
119 | (defn validate-field-scalar [graph field path query]
120 |   (let [fields (:fields query)]
121 |     (if (seq fields)
122 |       (throw (Exception. (str "Invalid fields. " (path->string path) " is a scalar which does not support fields, but was queried with fields: " (join ", " (map name->string fields)))))
123 |       query)))
124 | 
125 | (defn validate-has-fields [graph field path query]
126 |   (if (empty? (:fields query))
127 |     (let [valid-fields (keys (get-in graph [:fields (:type field)]))]
128 |       (throw (Exception. (str "Invalid fields. " (path->string path) " requires fields but was queried with none.  Valid fields are: " (join ", " (map name valid-fields))))))
129 |     query))
130 | 
131 | (defn validate-known-fields [graph field path query]
132 |   (let [type-name (:type field)
133 |         type (get-in graph [:types type-name])
134 |         type-fields (into #{} (keys (get-in graph [:fields type-name])))
135 |         query-fields (into #{} (map :name (:fields query)))
136 |         unknown-fields (set/difference query-fields type-fields)]
137 |     (if (seq unknown-fields)
138 |       (throw (Exception. (str "Invalid fields. " (path->string path) " has unknown fields: " (join ", " (map name unknown-fields)) ".  Valid fields are: " (join ", " (map name type-fields)) ".")))
139 |       query)))
140 | 
141 | (defn validate-fields [graph field path query]
142 |   ;; TODO: add duplicate field detection
143 |   (->> query
144 |     (validate-has-fields graph field path)
145 |     (validate-known-fields graph field path)))
146 | 
147 | (defn validate-field-complex [graph field path query]
148 |   (validate-fields graph field path query))
149 | 
150 | (defn validate-field-type [graph field path query]
151 |   (let [type (get-in graph [:types (:type field)])]
152 |     (condp = (:type/type type)
153 |       :scalar (validate-field-scalar graph field path query)
154 |       :complex (validate-field-complex graph field path query))))
155 | 
156 | (defn validate-field [graph field path query]
157 |   (->> query
158 |     (validate-field-type graph field path)
159 |     (validate-field-arguments graph field path)
160 |     (validate-field-calls graph field path)))
161 | 
162 | (defn validate-root-ident [graph root path query]
163 |   (let [query-ids (:ids query)]
164 |     (if (seq query-ids)
165 |       (throw (Exception. (str "Invalid ids. " (name->string root) " does not take ids but was called with: " (join ", " query-ids) ".")))
166 |       query)))
167 | 
168 | (defn validate-root-one [graph root path query]
169 |   (let [query-ids (:ids query)]
170 |     (condp = (count query-ids)
171 |       0 (throw (Exception. (str "Invalid id. " (name->string root) " takes a single id of type " (:id root) " but none was provided.")))
172 |       1 query
173 |       (throw (Exception. (str "Invalid ids. " (name->string root) " takes a single id of type " (:id root) " but was called with: " (join ", " query-ids) "."))))))
174 | 
175 | (defn validate-root-many [graph root path query]
176 |   (let [query-ids (:ids query)]
177 |     (if (seq query-ids)
178 |       query
179 |       (throw (Exception. (str "Invalid ids. " (name->string root) " takes 1 or more ids of type " (:id root) " but none was provided."))))))
180 | 
181 | (defn validate-root-ids [graph root path query]
182 |   (condp = (:root/type root)
183 |     :ident (validate-root-ident graph root path query)
184 |     :one (validate-root-one graph root path query)
185 |     :many (validate-root-many graph root path query)))
186 | 
187 | (defn validate-root [graph root path query]
188 |   (->> query
189 |     (validate-root-ids graph root path)
190 |     (validate-fields graph root path)))
191 | 
192 | (defn walk-query [f graph field path query]
193 |   (let [path (conj path (name (:name query)))]
194 |     (if (seq (:fields query))
195 |       (update-in (f graph field path query)
196 |                  [:fields]
197 |                  (partial mapv (fn [query]
198 |                                  (let [field (get-in graph [:fields (:type field) (:name query)])]
199 |                                    (walk-query f graph field path query)))))
200 |       (f graph field path query))))
201 | 
202 | (defn validate
203 |   ([graph query]
204 |    (if (insta/failure? query)
205 |      (throw (Exception. (pr-str (insta/get-failure query))))
206 |      (if-let [root (get-in graph [:roots (:name query)])]
207 |        (walk-query validate graph root [] query)
208 |        (throw (Exception. (str "Unknown root " (name (:name query)) ". Known roots: " (clojure.string/join ", " (map name (keys (:roots graph)))) "."))))))
209 |   ([graph field path query]
210 |    (condp = (:graph/type field)
211 |      :root (validate-root graph field path query)
212 |      :field (validate-field graph field path query))))
213 | 


--------------------------------------------------------------------------------
/src/huql/graph/schema.clj:
--------------------------------------------------------------------------------
  1 | (ns huql.graph.github
  2 |   (:require [schema.core :as s]))
  3 | 
  4 | (def Commit
  5 |   {:sha s/Str
  6 |    :message s/Str})
  7 | 
  8 | (def User
  9 |   {:login s/Str
 10 |    :id s/Int
 11 |    :name s/Str
 12 |    :avatar_url s/Str
 13 |    :location s/Str})
 14 | 
 15 | (def CommitResource
 16 |   {:sha s/Str
 17 |    :commit {:author {:name s/Str}
 18 |             :message s/Str}
 19 |    :author {:login s/Str
 20 |             :id s/Int
 21 |             :avatar_url s/Str
 22 |             :url s/Str}})
 23 | 
 24 | (def UserResource
 25 |   {:login s/Str
 26 |    :id s/Int
 27 |    :url s/Str
 28 |    :name s/Str
 29 |    :location s/Str
 30 |    :avatar_url s/Str})
 31 | 
 32 | (def CommitRoot
 33 |   {:sha s/Str})
 34 | 
 35 | (def query
 36 |   {:sha s/Str
 37 |    :message s/Str
 38 |    :author {:name s/Str}})
 39 | 
 40 | (def CommitRelations
 41 |   {:author {:schema User
 42 |             :executors [:commit->author]}
 43 |    :committer {:schema User
 44 |                :executors [:commit->committer]}})
 45 | 
 46 | (def graph
 47 |   {:commit {:schema {}
 48 |             :relations {:author :user
 49 |                         :committer :user}}
 50 |    :user {:schema {}
 51 |           :relations {:repositories [:repository]}}
 52 |    :repository {:schema {}
 53 |                 :relations {:most_recent_commit :commit}}
 54 |    :organization {:schema {}
 55 |                   :relations {:repositories [:repository]}}})
 56 | 
 57 | (def organization-root
 58 |   (select graph
 59 |           [:organization]
 60 |           [:organization :repositories]
 61 |           [:repository :most_recent_commit]
 62 |           [:repository :most_recent_commit :author]
 63 |           [:repository :most_recent_commit :committer]))
 64 | 
 65 | (def organization-root
 66 |   (select graph
 67 |           [:organization]
 68 |           [:organization :repositories]
 69 |           [:organization :repositories :filters :first]
 70 |           [:organization :repositories :filters :after]
 71 |           [:organization :repositories :most_recent_commit]
 72 |           [:organization :repositories :most_recent_commit :author]
 73 |           [:organization :repositories :most_recent_commit :committer]))
 74 | 
 75 | (def organization-root
 76 |   (select graph
 77 |           [:organization [:repositories [:filters [:first
 78 |                                                    :after]
 79 |                                          :most_recent_commit [:author
 80 |                                                               :comitter]]]]))
 81 | 
 82 | 
 83 | (def CommitResource->Commit
 84 |   (-> Commit
 85 |     (assoc :author (select-keys User [:login :id :name :avatar_url]))))
 86 | 
 87 | (def graph
 88 |   {CommitRoot {:edges [{:output CommitResource
 89 |                         :executor :url->commit-resource}]}
 90 |    CommitResource {:edges [{:output CommitResource->Commit
 91 |                             :executor :commit-resource->commit}]}
 92 |    CommitResource->Commit {:edges [{:output (-> CommitResource->Commit
 93 |                                               (assoc :author User))
 94 |                                     :executor :commit->author}]}})
 95 | 
 96 | 
 97 | 
 98 | (def graph
 99 |   {CommitRoot {:edges [{:output CommitResource
100 |                         :executor :url->commit-resource}]}
101 |    CommitResource {:edges [{:output (-> Commit (assoc :author (select-keys User [:login :id :name :avatar_url])))
102 |                             :executor :commit-resource->commit}
103 |                            {:output (-> Commit (assoc :author User))
104 |                             :executor :commit-with-author}]}})
105 | 
106 | (def edges
107 |   {:url->commit-resource {:in {:url s/Str} :out CommitResource}
108 |    :url->author-resource {:in {:url s/Str} :out AuthorResource}
109 |    :commit-resource->commit {:in CommitResource :out (-> Commit (assoc :author (select-keys User [:login :id :name :avatar_url])))}
110 |    :commit-with-author {:in Commit :out (-> Commit (assoc :author User))}
111 |    :user-resource->user {:in UserResource :out User}})
112 | 


--------------------------------------------------------------------------------
/src/huql/utils.clj:
--------------------------------------------------------------------------------
 1 | 
 2 | 
 3 | (defn tuple
 4 |   [& schema-name-pairs]
 5 |   (->> schema-name-pairs
 6 |     (mapv (fn [pair]
 7 |             (if (map? pair)
 8 |               (apply s/optional (-> pair seq first))
 9 |               (apply s/one pair))))))
10 | 


--------------------------------------------------------------------------------