├── .gitignore ├── .travis.yml ├── LICENSE ├── README.md ├── bin └── choo-choo ├── exercises ├── a_cute_beginning │ ├── exercise.js │ └── problem.md └── countdown_till_noon │ ├── exercise.js │ ├── problem.md │ └── solution │ └── solution.js ├── i18n ├── en.json └── footer │ └── en.md ├── index.js ├── lib ├── bundle_server.js ├── console.js ├── footer.js ├── header.js └── res_server.js ├── package-lock.json ├── package.json └── verify.js /.gitignore: -------------------------------------------------------------------------------- 1 | node_modules/ 2 | .DS_Store 3 | test/ 4 | -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | node_js: 2 | - 8 3 | - 9 4 | language: node_js 5 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU AFFERO GENERAL PUBLIC LICENSE 2 | Version 3, 19 November 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU Affero General Public License is a free, copyleft license for 11 | software and other kinds of works, specifically designed to ensure 12 | cooperation with the community in the case of network server software. 13 | 14 | The licenses for most software and other practical works are designed 15 | to take away your freedom to share and change the works. By contrast, 16 | our General Public Licenses are intended to guarantee your freedom to 17 | share and change all versions of a program--to make sure it remains free 18 | software for all its users. 19 | 20 | When we speak of free software, we are referring to freedom, not 21 | price. Our General Public Licenses are designed to make sure that you 22 | have the freedom to distribute copies of free software (and charge for 23 | them if you wish), that you receive source code or can get it if you 24 | want it, that you can change the software or use pieces of it in new 25 | free programs, and that you know you can do these things. 26 | 27 | Developers that use our General Public Licenses protect your rights 28 | with two steps: (1) assert copyright on the software, and (2) offer 29 | you this License which gives you legal permission to copy, distribute 30 | and/or modify the software. 31 | 32 | A secondary benefit of defending all users' freedom is that 33 | improvements made in alternate versions of the program, if they 34 | receive widespread use, become available for other developers to 35 | incorporate. Many developers of free software are heartened and 36 | encouraged by the resulting cooperation. However, in the case of 37 | software used on network servers, this result may fail to come about. 38 | The GNU General Public License permits making a modified version and 39 | letting the public access it on a server without ever releasing its 40 | source code to the public. 41 | 42 | The GNU Affero General Public License is designed specifically to 43 | ensure that, in such cases, the modified source code becomes available 44 | to the community. It requires the operator of a network server to 45 | provide the source code of the modified version running there to the 46 | users of that server. Therefore, public use of a modified version, on 47 | a publicly accessible server, gives the public access to the source 48 | code of the modified version. 49 | 50 | An older license, called the Affero General Public License and 51 | published by Affero, was designed to accomplish similar goals. This is 52 | a different license, not a version of the Affero GPL, but Affero has 53 | released a new version of the Affero GPL which permits relicensing under 54 | this license. 55 | 56 | The precise terms and conditions for copying, distribution and 57 | modification follow. 58 | 59 | TERMS AND CONDITIONS 60 | 61 | 0. Definitions. 62 | 63 | "This License" refers to version 3 of the GNU Affero General Public License. 64 | 65 | "Copyright" also means copyright-like laws that apply to other kinds of 66 | works, such as semiconductor masks. 67 | 68 | "The Program" refers to any copyrightable work licensed under this 69 | License. Each licensee is addressed as "you". "Licensees" and 70 | "recipients" may be individuals or organizations. 71 | 72 | To "modify" a work means to copy from or adapt all or part of the work 73 | in a fashion requiring copyright permission, other than the making of an 74 | exact copy. The resulting work is called a "modified version" of the 75 | earlier work or a work "based on" the earlier work. 76 | 77 | A "covered work" means either the unmodified Program or a work based 78 | on the Program. 79 | 80 | To "propagate" a work means to do anything with it that, without 81 | permission, would make you directly or secondarily liable for 82 | infringement under applicable copyright law, except executing it on a 83 | computer or modifying a private copy. Propagation includes copying, 84 | distribution (with or without modification), making available to the 85 | public, and in some countries other activities as well. 86 | 87 | To "convey" a work means any kind of propagation that enables other 88 | parties to make or receive copies. Mere interaction with a user through 89 | a computer network, with no transfer of a copy, is not conveying. 90 | 91 | An interactive user interface displays "Appropriate Legal Notices" 92 | to the extent that it includes a convenient and prominently visible 93 | feature that (1) displays an appropriate copyright notice, and (2) 94 | tells the user that there is no warranty for the work (except to the 95 | extent that warranties are provided), that licensees may convey the 96 | work under this License, and how to view a copy of this License. If 97 | the interface presents a list of user commands or options, such as a 98 | menu, a prominent item in the list meets this criterion. 99 | 100 | 1. Source Code. 101 | 102 | The "source code" for a work means the preferred form of the work 103 | for making modifications to it. "Object code" means any non-source 104 | form of a work. 105 | 106 | A "Standard Interface" means an interface that either is an official 107 | standard defined by a recognized standards body, or, in the case of 108 | interfaces specified for a particular programming language, one that 109 | is widely used among developers working in that language. 110 | 111 | The "System Libraries" of an executable work include anything, other 112 | than the work as a whole, that (a) is included in the normal form of 113 | packaging a Major Component, but which is not part of that Major 114 | Component, and (b) serves only to enable use of the work with that 115 | Major Component, or to implement a Standard Interface for which an 116 | implementation is available to the public in source code form. A 117 | "Major Component", in this context, means a major essential component 118 | (kernel, window system, and so on) of the specific operating system 119 | (if any) on which the executable work runs, or a compiler used to 120 | produce the work, or an object code interpreter used to run it. 121 | 122 | The "Corresponding Source" for a work in object code form means all 123 | the source code needed to generate, install, and (for an executable 124 | work) run the object code and to modify the work, including scripts to 125 | control those activities. However, it does not include the work's 126 | System Libraries, or general-purpose tools or generally available free 127 | programs which are used unmodified in performing those activities but 128 | which are not part of the work. For example, Corresponding Source 129 | includes interface definition files associated with source files for 130 | the work, and the source code for shared libraries and dynamically 131 | linked subprograms that the work is specifically designed to require, 132 | such as by intimate data communication or control flow between those 133 | subprograms and other parts of the work. 134 | 135 | The Corresponding Source need not include anything that users 136 | can regenerate automatically from other parts of the Corresponding 137 | Source. 138 | 139 | The Corresponding Source for a work in source code form is that 140 | same work. 141 | 142 | 2. Basic Permissions. 143 | 144 | All rights granted under this License are granted for the term of 145 | copyright on the Program, and are irrevocable provided the stated 146 | conditions are met. This License explicitly affirms your unlimited 147 | permission to run the unmodified Program. The output from running a 148 | covered work is covered by this License only if the output, given its 149 | content, constitutes a covered work. This License acknowledges your 150 | rights of fair use or other equivalent, as provided by copyright law. 151 | 152 | You may make, run and propagate covered works that you do not 153 | convey, without conditions so long as your license otherwise remains 154 | in force. You may convey covered works to others for the sole purpose 155 | of having them make modifications exclusively for you, or provide you 156 | with facilities for running those works, provided that you comply with 157 | the terms of this License in conveying all material for which you do 158 | not control copyright. Those thus making or running the covered works 159 | for you must do so exclusively on your behalf, under your direction 160 | and control, on terms that prohibit them from making any copies of 161 | your copyrighted material outside their relationship with you. 162 | 163 | Conveying under any other circumstances is permitted solely under 164 | the conditions stated below. Sublicensing is not allowed; section 10 165 | makes it unnecessary. 166 | 167 | 3. Protecting Users' Legal Rights From Anti-Circumvention Law. 168 | 169 | No covered work shall be deemed part of an effective technological 170 | measure under any applicable law fulfilling obligations under article 171 | 11 of the WIPO copyright treaty adopted on 20 December 1996, or 172 | similar laws prohibiting or restricting circumvention of such 173 | measures. 174 | 175 | When you convey a covered work, you waive any legal power to forbid 176 | circumvention of technological measures to the extent such circumvention 177 | is effected by exercising rights under this License with respect to 178 | the covered work, and you disclaim any intention to limit operation or 179 | modification of the work as a means of enforcing, against the work's 180 | users, your or third parties' legal rights to forbid circumvention of 181 | technological measures. 182 | 183 | 4. Conveying Verbatim Copies. 184 | 185 | You may convey verbatim copies of the Program's source code as you 186 | receive it, in any medium, provided that you conspicuously and 187 | appropriately publish on each copy an appropriate copyright notice; 188 | keep intact all notices stating that this License and any 189 | non-permissive terms added in accord with section 7 apply to the code; 190 | keep intact all notices of the absence of any warranty; and give all 191 | recipients a copy of this License along with the Program. 192 | 193 | You may charge any price or no price for each copy that you convey, 194 | and you may offer support or warranty protection for a fee. 195 | 196 | 5. Conveying Modified Source Versions. 197 | 198 | You may convey a work based on the Program, or the modifications to 199 | produce it from the Program, in the form of source code under the 200 | terms of section 4, provided that you also meet all of these conditions: 201 | 202 | a) The work must carry prominent notices stating that you modified 203 | it, and giving a relevant date. 204 | 205 | b) The work must carry prominent notices stating that it is 206 | released under this License and any conditions added under section 207 | 7. This requirement modifies the requirement in section 4 to 208 | "keep intact all notices". 209 | 210 | c) You must license the entire work, as a whole, under this 211 | License to anyone who comes into possession of a copy. This 212 | License will therefore apply, along with any applicable section 7 213 | additional terms, to the whole of the work, and all its parts, 214 | regardless of how they are packaged. This License gives no 215 | permission to license the work in any other way, but it does not 216 | invalidate such permission if you have separately received it. 217 | 218 | d) If the work has interactive user interfaces, each must display 219 | Appropriate Legal Notices; however, if the Program has interactive 220 | interfaces that do not display Appropriate Legal Notices, your 221 | work need not make them do so. 222 | 223 | A compilation of a covered work with other separate and independent 224 | works, which are not by their nature extensions of the covered work, 225 | and which are not combined with it such as to form a larger program, 226 | in or on a volume of a storage or distribution medium, is called an 227 | "aggregate" if the compilation and its resulting copyright are not 228 | used to limit the access or legal rights of the compilation's users 229 | beyond what the individual works permit. Inclusion of a covered work 230 | in an aggregate does not cause this License to apply to the other 231 | parts of the aggregate. 232 | 233 | 6. Conveying Non-Source Forms. 234 | 235 | You may convey a covered work in object code form under the terms 236 | of sections 4 and 5, provided that you also convey the 237 | machine-readable Corresponding Source under the terms of this License, 238 | in one of these ways: 239 | 240 | a) Convey the object code in, or embodied in, a physical product 241 | (including a physical distribution medium), accompanied by the 242 | Corresponding Source fixed on a durable physical medium 243 | customarily used for software interchange. 244 | 245 | b) Convey the object code in, or embodied in, a physical product 246 | (including a physical distribution medium), accompanied by a 247 | written offer, valid for at least three years and valid for as 248 | long as you offer spare parts or customer support for that product 249 | model, to give anyone who possesses the object code either (1) a 250 | copy of the Corresponding Source for all the software in the 251 | product that is covered by this License, on a durable physical 252 | medium customarily used for software interchange, for a price no 253 | more than your reasonable cost of physically performing this 254 | conveying of source, or (2) access to copy the 255 | Corresponding Source from a network server at no charge. 256 | 257 | c) Convey individual copies of the object code with a copy of the 258 | written offer to provide the Corresponding Source. This 259 | alternative is allowed only occasionally and noncommercially, and 260 | only if you received the object code with such an offer, in accord 261 | with subsection 6b. 262 | 263 | d) Convey the object code by offering access from a designated 264 | place (gratis or for a charge), and offer equivalent access to the 265 | Corresponding Source in the same way through the same place at no 266 | further charge. You need not require recipients to copy the 267 | Corresponding Source along with the object code. If the place to 268 | copy the object code is a network server, the Corresponding Source 269 | may be on a different server (operated by you or a third party) 270 | that supports equivalent copying facilities, provided you maintain 271 | clear directions next to the object code saying where to find the 272 | Corresponding Source. Regardless of what server hosts the 273 | Corresponding Source, you remain obligated to ensure that it is 274 | available for as long as needed to satisfy these requirements. 275 | 276 | e) Convey the object code using peer-to-peer transmission, provided 277 | you inform other peers where the object code and Corresponding 278 | Source of the work are being offered to the general public at no 279 | charge under subsection 6d. 280 | 281 | A separable portion of the object code, whose source code is excluded 282 | from the Corresponding Source as a System Library, need not be 283 | included in conveying the object code work. 284 | 285 | A "User Product" is either (1) a "consumer product", which means any 286 | tangible personal property which is normally used for personal, family, 287 | or household purposes, or (2) anything designed or sold for incorporation 288 | into a dwelling. In determining whether a product is a consumer product, 289 | doubtful cases shall be resolved in favor of coverage. For a particular 290 | product received by a particular user, "normally used" refers to a 291 | typical or common use of that class of product, regardless of the status 292 | of the particular user or of the way in which the particular user 293 | actually uses, or expects or is expected to use, the product. A product 294 | is a consumer product regardless of whether the product has substantial 295 | commercial, industrial or non-consumer uses, unless such uses represent 296 | the only significant mode of use of the product. 297 | 298 | "Installation Information" for a User Product means any methods, 299 | procedures, authorization keys, or other information required to install 300 | and execute modified versions of a covered work in that User Product from 301 | a modified version of its Corresponding Source. The information must 302 | suffice to ensure that the continued functioning of the modified object 303 | code is in no case prevented or interfered with solely because 304 | modification has been made. 305 | 306 | If you convey an object code work under this section in, or with, or 307 | specifically for use in, a User Product, and the conveying occurs as 308 | part of a transaction in which the right of possession and use of the 309 | User Product is transferred to the recipient in perpetuity or for a 310 | fixed term (regardless of how the transaction is characterized), the 311 | Corresponding Source conveyed under this section must be accompanied 312 | by the Installation Information. But this requirement does not apply 313 | if neither you nor any third party retains the ability to install 314 | modified object code on the User Product (for example, the work has 315 | been installed in ROM). 316 | 317 | The requirement to provide Installation Information does not include a 318 | requirement to continue to provide support service, warranty, or updates 319 | for a work that has been modified or installed by the recipient, or for 320 | the User Product in which it has been modified or installed. Access to a 321 | network may be denied when the modification itself materially and 322 | adversely affects the operation of the network or violates the rules and 323 | protocols for communication across the network. 324 | 325 | Corresponding Source conveyed, and Installation Information provided, 326 | in accord with this section must be in a format that is publicly 327 | documented (and with an implementation available to the public in 328 | source code form), and must require no special password or key for 329 | unpacking, reading or copying. 330 | 331 | 7. Additional Terms. 332 | 333 | "Additional permissions" are terms that supplement the terms of this 334 | License by making exceptions from one or more of its conditions. 335 | Additional permissions that are applicable to the entire Program shall 336 | be treated as though they were included in this License, to the extent 337 | that they are valid under applicable law. If additional permissions 338 | apply only to part of the Program, that part may be used separately 339 | under those permissions, but the entire Program remains governed by 340 | this License without regard to the additional permissions. 341 | 342 | When you convey a copy of a covered work, you may at your option 343 | remove any additional permissions from that copy, or from any part of 344 | it. (Additional permissions may be written to require their own 345 | removal in certain cases when you modify the work.) You may place 346 | additional permissions on material, added by you to a covered work, 347 | for which you have or can give appropriate copyright permission. 348 | 349 | Notwithstanding any other provision of this License, for material you 350 | add to a covered work, you may (if authorized by the copyright holders of 351 | that material) supplement the terms of this License with terms: 352 | 353 | a) Disclaiming warranty or limiting liability differently from the 354 | terms of sections 15 and 16 of this License; or 355 | 356 | b) Requiring preservation of specified reasonable legal notices or 357 | author attributions in that material or in the Appropriate Legal 358 | Notices displayed by works containing it; or 359 | 360 | c) Prohibiting misrepresentation of the origin of that material, or 361 | requiring that modified versions of such material be marked in 362 | reasonable ways as different from the original version; or 363 | 364 | d) Limiting the use for publicity purposes of names of licensors or 365 | authors of the material; or 366 | 367 | e) Declining to grant rights under trademark law for use of some 368 | trade names, trademarks, or service marks; or 369 | 370 | f) Requiring indemnification of licensors and authors of that 371 | material by anyone who conveys the material (or modified versions of 372 | it) with contractual assumptions of liability to the recipient, for 373 | any liability that these contractual assumptions directly impose on 374 | those licensors and authors. 375 | 376 | All other non-permissive additional terms are considered "further 377 | restrictions" within the meaning of section 10. If the Program as you 378 | received it, or any part of it, contains a notice stating that it is 379 | governed by this License along with a term that is a further 380 | restriction, you may remove that term. If a license document contains 381 | a further restriction but permits relicensing or conveying under this 382 | License, you may add to a covered work material governed by the terms 383 | of that license document, provided that the further restriction does 384 | not survive such relicensing or conveying. 385 | 386 | If you add terms to a covered work in accord with this section, you 387 | must place, in the relevant source files, a statement of the 388 | additional terms that apply to those files, or a notice indicating 389 | where to find the applicable terms. 390 | 391 | Additional terms, permissive or non-permissive, may be stated in the 392 | form of a separately written license, or stated as exceptions; 393 | the above requirements apply either way. 394 | 395 | 8. Termination. 396 | 397 | You may not propagate or modify a covered work except as expressly 398 | provided under this License. Any attempt otherwise to propagate or 399 | modify it is void, and will automatically terminate your rights under 400 | this License (including any patent licenses granted under the third 401 | paragraph of section 11). 402 | 403 | However, if you cease all violation of this License, then your 404 | license from a particular copyright holder is reinstated (a) 405 | provisionally, unless and until the copyright holder explicitly and 406 | finally terminates your license, and (b) permanently, if the copyright 407 | holder fails to notify you of the violation by some reasonable means 408 | prior to 60 days after the cessation. 409 | 410 | Moreover, your license from a particular copyright holder is 411 | reinstated permanently if the copyright holder notifies you of the 412 | violation by some reasonable means, this is the first time you have 413 | received notice of violation of this License (for any work) from that 414 | copyright holder, and you cure the violation prior to 30 days after 415 | your receipt of the notice. 416 | 417 | Termination of your rights under this section does not terminate the 418 | licenses of parties who have received copies or rights from you under 419 | this License. If your rights have been terminated and not permanently 420 | reinstated, you do not qualify to receive new licenses for the same 421 | material under section 10. 422 | 423 | 9. Acceptance Not Required for Having Copies. 424 | 425 | You are not required to accept this License in order to receive or 426 | run a copy of the Program. Ancillary propagation of a covered work 427 | occurring solely as a consequence of using peer-to-peer transmission 428 | to receive a copy likewise does not require acceptance. However, 429 | nothing other than this License grants you permission to propagate or 430 | modify any covered work. These actions infringe copyright if you do 431 | not accept this License. Therefore, by modifying or propagating a 432 | covered work, you indicate your acceptance of this License to do so. 433 | 434 | 10. Automatic Licensing of Downstream Recipients. 435 | 436 | Each time you convey a covered work, the recipient automatically 437 | receives a license from the original licensors, to run, modify and 438 | propagate that work, subject to this License. You are not responsible 439 | for enforcing compliance by third parties with this License. 440 | 441 | An "entity transaction" is a transaction transferring control of an 442 | organization, or substantially all assets of one, or subdividing an 443 | organization, or merging organizations. If propagation of a covered 444 | work results from an entity transaction, each party to that 445 | transaction who receives a copy of the work also receives whatever 446 | licenses to the work the party's predecessor in interest had or could 447 | give under the previous paragraph, plus a right to possession of the 448 | Corresponding Source of the work from the predecessor in interest, if 449 | the predecessor has it or can get it with reasonable efforts. 450 | 451 | You may not impose any further restrictions on the exercise of the 452 | rights granted or affirmed under this License. For example, you may 453 | not impose a license fee, royalty, or other charge for exercise of 454 | rights granted under this License, and you may not initiate litigation 455 | (including a cross-claim or counterclaim in a lawsuit) alleging that 456 | any patent claim is infringed by making, using, selling, offering for 457 | sale, or importing the Program or any portion of it. 458 | 459 | 11. Patents. 460 | 461 | A "contributor" is a copyright holder who authorizes use under this 462 | License of the Program or a work on which the Program is based. The 463 | work thus licensed is called the contributor's "contributor version". 464 | 465 | A contributor's "essential patent claims" are all patent claims 466 | owned or controlled by the contributor, whether already acquired or 467 | hereafter acquired, that would be infringed by some manner, permitted 468 | by this License, of making, using, or selling its contributor version, 469 | but do not include claims that would be infringed only as a 470 | consequence of further modification of the contributor version. For 471 | purposes of this definition, "control" includes the right to grant 472 | patent sublicenses in a manner consistent with the requirements of 473 | this License. 474 | 475 | Each contributor grants you a non-exclusive, worldwide, royalty-free 476 | patent license under the contributor's essential patent claims, to 477 | make, use, sell, offer for sale, import and otherwise run, modify and 478 | propagate the contents of its contributor version. 479 | 480 | In the following three paragraphs, a "patent license" is any express 481 | agreement or commitment, however denominated, not to enforce a patent 482 | (such as an express permission to practice a patent or covenant not to 483 | sue for patent infringement). To "grant" such a patent license to a 484 | party means to make such an agreement or commitment not to enforce a 485 | patent against the party. 486 | 487 | If you convey a covered work, knowingly relying on a patent license, 488 | and the Corresponding Source of the work is not available for anyone 489 | to copy, free of charge and under the terms of this License, through a 490 | publicly available network server or other readily accessible means, 491 | then you must either (1) cause the Corresponding Source to be so 492 | available, or (2) arrange to deprive yourself of the benefit of the 493 | patent license for this particular work, or (3) arrange, in a manner 494 | consistent with the requirements of this License, to extend the patent 495 | license to downstream recipients. "Knowingly relying" means you have 496 | actual knowledge that, but for the patent license, your conveying the 497 | covered work in a country, or your recipient's use of the covered work 498 | in a country, would infringe one or more identifiable patents in that 499 | country that you have reason to believe are valid. 500 | 501 | If, pursuant to or in connection with a single transaction or 502 | arrangement, you convey, or propagate by procuring conveyance of, a 503 | covered work, and grant a patent license to some of the parties 504 | receiving the covered work authorizing them to use, propagate, modify 505 | or convey a specific copy of the covered work, then the patent license 506 | you grant is automatically extended to all recipients of the covered 507 | work and works based on it. 508 | 509 | A patent license is "discriminatory" if it does not include within 510 | the scope of its coverage, prohibits the exercise of, or is 511 | conditioned on the non-exercise of one or more of the rights that are 512 | specifically granted under this License. You may not convey a covered 513 | work if you are a party to an arrangement with a third party that is 514 | in the business of distributing software, under which you make payment 515 | to the third party based on the extent of your activity of conveying 516 | the work, and under which the third party grants, to any of the 517 | parties who would receive the covered work from you, a discriminatory 518 | patent license (a) in connection with copies of the covered work 519 | conveyed by you (or copies made from those copies), or (b) primarily 520 | for and in connection with specific products or compilations that 521 | contain the covered work, unless you entered into that arrangement, 522 | or that patent license was granted, prior to 28 March 2007. 523 | 524 | Nothing in this License shall be construed as excluding or limiting 525 | any implied license or other defenses to infringement that may 526 | otherwise be available to you under applicable patent law. 527 | 528 | 12. No Surrender of Others' Freedom. 529 | 530 | If conditions are imposed on you (whether by court order, agreement or 531 | otherwise) that contradict the conditions of this License, they do not 532 | excuse you from the conditions of this License. If you cannot convey a 533 | covered work so as to satisfy simultaneously your obligations under this 534 | License and any other pertinent obligations, then as a consequence you may 535 | not convey it at all. For example, if you agree to terms that obligate you 536 | to collect a royalty for further conveying from those to whom you convey 537 | the Program, the only way you could satisfy both those terms and this 538 | License would be to refrain entirely from conveying the Program. 539 | 540 | 13. Remote Network Interaction; Use with the GNU General Public License. 541 | 542 | Notwithstanding any other provision of this License, if you modify the 543 | Program, your modified version must prominently offer all users 544 | interacting with it remotely through a computer network (if your version 545 | supports such interaction) an opportunity to receive the Corresponding 546 | Source of your version by providing access to the Corresponding Source 547 | from a network server at no charge, through some standard or customary 548 | means of facilitating copying of software. This Corresponding Source 549 | shall include the Corresponding Source for any work covered by version 3 550 | of the GNU General Public License that is incorporated pursuant to the 551 | following paragraph. 552 | 553 | Notwithstanding any other provision of this License, you have 554 | permission to link or combine any covered work with a work licensed 555 | under version 3 of the GNU General Public License into a single 556 | combined work, and to convey the resulting work. The terms of this 557 | License will continue to apply to the part which is the covered work, 558 | but the work with which it is combined will remain governed by version 559 | 3 of the GNU General Public License. 560 | 561 | 14. Revised Versions of this License. 562 | 563 | The Free Software Foundation may publish revised and/or new versions of 564 | the GNU Affero General Public License from time to time. Such new versions 565 | will be similar in spirit to the present version, but may differ in detail to 566 | address new problems or concerns. 567 | 568 | Each version is given a distinguishing version number. If the 569 | Program specifies that a certain numbered version of the GNU Affero General 570 | Public License "or any later version" applies to it, you have the 571 | option of following the terms and conditions either of that numbered 572 | version or of any later version published by the Free Software 573 | Foundation. If the Program does not specify a version number of the 574 | GNU Affero General Public License, you may choose any version ever published 575 | by the Free Software Foundation. 576 | 577 | If the Program specifies that a proxy can decide which future 578 | versions of the GNU Affero General Public License can be used, that proxy's 579 | public statement of acceptance of a version permanently authorizes you 580 | to choose that version for the Program. 581 | 582 | Later license versions may give you additional or different 583 | permissions. However, no additional obligations are imposed on any 584 | author or copyright holder as a result of your choosing to follow a 585 | later version. 586 | 587 | 15. Disclaimer of Warranty. 588 | 589 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 590 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 591 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 592 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 593 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 594 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 595 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 596 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 597 | 598 | 16. Limitation of Liability. 599 | 600 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 601 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 602 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 603 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 604 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 605 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 606 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 607 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 608 | SUCH DAMAGES. 609 | 610 | 17. Interpretation of Sections 15 and 16. 611 | 612 | If the disclaimer of warranty and limitation of liability provided 613 | above cannot be given local legal effect according to their terms, 614 | reviewing courts shall apply local law that most closely approximates 615 | an absolute waiver of all civil liability in connection with the 616 | Program, unless a warranty or assumption of liability accompanies a 617 | copy of the Program in return for a fee. 618 | 619 | END OF TERMS AND CONDITIONS 620 | 621 | How to Apply These Terms to Your New Programs 622 | 623 | If you develop a new program, and you want it to be of the greatest 624 | possible use to the public, the best way to achieve this is to make it 625 | free software which everyone can redistribute and change under these terms. 626 | 627 | To do so, attach the following notices to the program. It is safest 628 | to attach them to the start of each source file to most effectively 629 | state the exclusion of warranty; and each file should have at least 630 | the "copyright" line and a pointer to where the full notice is found. 631 | 632 | 633 | Copyright (C) 634 | 635 | This program is free software: you can redistribute it and/or modify 636 | it under the terms of the GNU Affero General Public License as published 637 | by the Free Software Foundation, either version 3 of the License, or 638 | (at your option) any later version. 639 | 640 | This program is distributed in the hope that it will be useful, 641 | but WITHOUT ANY WARRANTY; without even the implied warranty of 642 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 643 | GNU Affero General Public License for more details. 644 | 645 | You should have received a copy of the GNU Affero General Public License 646 | along with this program. If not, see . 647 | 648 | Also add information on how to contact you by electronic and paper mail. 649 | 650 | If your software can interact with users remotely through a computer 651 | network, you should also make sure that it provides a way for users to 652 | get its source. For example, if your program is a web application, its 653 | interface could display a "Source" link that leads users to an archive 654 | of the code. There are many ways you could offer source, and different 655 | solutions will be better for different programs; see section 13 for the 656 | specific requirements. 657 | 658 | You should also get your employer (if you work as a programmer) or school, 659 | if any, to sign a "copyright disclaimer" for the program, if necessary. 660 | For more information on this, and how to apply and follow the GNU AGPL, see 661 | . 662 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # choo-choo 2 | 3 | [![Travis](https://img.shields.io/travis/choojs/choo-choo.svg?style=flat-square)](https://travis-ci.org/choojs/choo-choo) 4 | [![npm](https://img.shields.io/npm/v/choo-choo.svg?style=flat-square)](https://npm.im/choo-choo) 5 | [![standard style](https://img.shields.io/badge/codestyle-standard-green.svg?style=flat-square)](https://standardjs.com) 6 | 7 | A [workshopper] that teaches you about [choo]. 8 | 9 | ## Installation 10 | 11 | You need the latest stable [Node.js] release to run this workshopper! 12 | 13 | ```sh 14 | npm install -g choo-choo 15 | ``` 16 | 17 | Then, just run `choo-choo`, select the first exercise, and you're good to go! 18 | 19 | ## Work In Progress 20 | 21 | This workshopper is in active development. There's currently only a couple of 22 | exercises, but we're working on pushing out more. If you want to help out, 23 | have a look at [how to contribute](#contributing)! 24 | 25 | ## Contributing 26 | 27 | In order to get a basic local setup: 28 | 29 | ``` 30 | git clone https://github.com/choojs/choo-choo 31 | cd choo-choo 32 | npm install 33 | ``` 34 | 35 | It's recommended that you run `npm link` so that you can use the `choo-choo` 36 | command globally, but still symlinked to your development folder. This makes 37 | testing exercises much easier. 38 | 39 | - `npm test`: runs the standard style linter 40 | 41 | ## Maintainers 42 | 43 | - Olivia Hugger `` 44 | 45 | ## License 46 | 47 | GNU AGPL 3, see [LICENSE](./LICENSE) 48 | 49 | [workshopper]: https://nodeschool.io/#workshoppers 50 | [choo]: https://choo.io 51 | [Node.js]: https://nodejs.org 52 | -------------------------------------------------------------------------------- /bin/choo-choo: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env node 2 | 3 | const updateNotifier = require('update-notifier') 4 | const pkg = require('../package.json') 5 | const notifier = updateNotifier({ 6 | pkg, 7 | updateCheckInterval: 1000 * 60 * 60 * 24 // 1 day 8 | }) 9 | 10 | if (notifier.update) { 11 | notifier.notify() 12 | process.exit(0) 13 | } 14 | 15 | require('../index').execute(process.argv.slice(2)) 16 | -------------------------------------------------------------------------------- /exercises/a_cute_beginning/exercise.js: -------------------------------------------------------------------------------- 1 | let exercise = require('workshopper-exercise')() 2 | const isHtml = require('is-html') 3 | const got = require('got') 4 | const log = require('../../lib/console') 5 | const bundleServer = require('../../lib/bundle_server') 6 | 7 | // Set up our bundle serving server... 8 | exercise = bundleServer(exercise) 9 | 10 | // Add a processor that only runs on `choo-choo verify` that checks if the 11 | // bundle server returns anything valid HTML, meaning that the directory has 12 | // been successfully downloaded 13 | exercise.addVerifyProcessor(function (cb) { 14 | got(`http://localhost:${this.bundleServerPort}`).then(res => { 15 | log.pass(this.__('response')) 16 | 17 | if (isHtml(res.body)) { 18 | log.pass(this.__('content_ok')) 19 | cb() 20 | } else { 21 | log.fail(this.__('not_html')) 22 | cb(new Error(this.__('not_html'))) 23 | } 24 | }).catch(err => { 25 | console.error(err) 26 | }) 27 | }) 28 | 29 | // Don't exit when ran with `choo-choo run` 30 | exercise.addRunProcessor(function (cb) {}) 31 | 32 | module.exports = exercise 33 | -------------------------------------------------------------------------------- /exercises/a_cute_beginning/problem.md: -------------------------------------------------------------------------------- 1 | Welcome to `choo-choo`, a workshopper designed to teach you _choo_, a tiny 2 | web framework that runs completely in your browser! In this first exercise, 3 | we're going to set up your local environment so that you can hopefully 4 | breeze through these exercises! 5 | 6 | The good news is: If you have `choo-choo` installed globally, then you don't 7 | need anything else! We've built a starter kit that helps you get going in no 8 | time, and you can use it thanks to npm! 9 | 10 | (There's no bad news) 11 | 12 | To install the starter kit, just type: 13 | 14 | ```sh 15 | npx create-choo-app 16 | ``` 17 | 18 | Where path is the directory you want to install the kit to. After it's set up, 19 | move into the directory: 20 | 21 | ```sh 22 | cd 23 | ``` 24 | 25 | Then, you can open your editor and have a look at the files. Don't worry if 26 | not everything is clear at first, that what we're going to be working on in the 27 | next exercises. To pass this exercise, just run: 28 | 29 | ```sh 30 | choo-choo verify 31 | ``` 32 | -------------------------------------------------------------------------------- /exercises/countdown_till_noon/exercise.js: -------------------------------------------------------------------------------- 1 | let exercise = require('workshopper-exercise')() 2 | const bundleServer = require('../../lib/bundle_server') 3 | const resServer = require('../../lib/res_server') 4 | 5 | exercise = bundleServer(exercise) 6 | 7 | resServer(exercise, function (mode, cb) { 8 | this.resServer.post('/response', (req, res) => { 9 | if (req.body.totalClicks === 5 && mode === 'verify') { 10 | this.spinner.succeed(this.__('verification.ok')) 11 | res.end() 12 | cb() 13 | } 14 | }) 15 | }) 16 | 17 | module.exports = exercise 18 | -------------------------------------------------------------------------------- /exercises/countdown_till_noon/problem.md: -------------------------------------------------------------------------------- 1 | Woo! You have your development environment all set up, so now we're ready to 2 | give into Choo and how it works. Choo is an _event based_ framework, which 3 | means that there's a big continous event loop that communicates with both 4 | sender and recipient. It looks a bit like this: 5 | 6 | ``` 7 | -------------- 8 | | | 9 | --------> | Event Loop | ------> 10 | Emitters | | Listeners 11 | -------------- 12 | ``` 13 | 14 | Think of it as a big blackbox that takes messages from your code that say 15 | "Hey, can you activate Event XYZ for me?", and redirects them to the 16 | proper recipient, in this case, an bit of code that only fires on Event XYZ. 17 | 18 | This is backed by a _global, mutable state_, which is an object that holds all 19 | of the data your app cares about. In the example case of a memory card game 20 | app, this would be which cards the player has gotten wrong or right, what the 21 | player's score is, maybe a timer, and so forth. The state should only be 22 | modified in the event listeners, which is why you would use the state in the 23 | first place - to decouple it from your app's templates. 24 | 25 | Speaking of templates, Choo uses JavaScript template strings, which are 26 | essentially multiline strings that support variable interpolation. They look 27 | like this: 28 | 29 | ``` 30 | const string = ` 31 | this is a multiline string. 32 | 33 | 1 plus 1 is: ${1 + 1} 34 | ` 35 | ``` 36 | 37 | Choo uses these for its HTML templates. 38 | 39 | ## The challenge 40 | 41 | If you run `choo-choo run`, you will get a link in your console. If you paste 42 | this link into a browser, you can see that there's a little example application 43 | already set up for you! It's a simple counter that increases when you press the 44 | big button. We'll use this to check when the button has been clicked exactly 45 | five times, at which point we'll make the exercise pass. 46 | 47 | The directory structure of your project is split into different parts: 48 | 49 | ``` 50 | ├── assets -- stuff that should be served statically, e.g. image files and so on 51 | ├── views -- a view file returns html, takes the current state and can emit events 52 | │   ├── 404.js -- used for any route that doesn't match 53 | │   └── main.js -- used when we visit the root of our site 54 | ├── stores -- contains all event listeners ("stores") 55 | | └── clicks.js -- contains event listeners for the sample application 56 | ├── README.md -- useful for if you want to put your project on GitHub 57 | ├── index.js -- the main file 58 | ├── manifest.json -- irrelevant for now, useful for offline capabilities 59 | ├── package-lock.json -- lockfile for npm 60 | ├── package.json -- it's a package.json! 61 | └── sw.js -- used for service workers, irrelevant right now 62 | ``` 63 | 64 | The most interesting parts right now are the `views/` folder and the `stores/clicks.js` 65 | file. Views fire events, and they're being handled by the code in `stores/clicks.js`. 66 | So, you're going to have to modify the code in `stores/clicks.js`, since code in there 67 | gets called every time you press the button. 68 | 69 | In order to pass this exercise, use the `verify` method provided by 70 | `choo-choo`. First, install `choo-choo` as a dependency into your app: 71 | 72 | ```sh 73 | npm install choo-choo 74 | ``` 75 | 76 | Then, require the `verify` method and pass it your app's state: 77 | 78 | ```js 79 | var verify = require('choo-choo/verify') 80 | 81 | // ... 82 | verify(state) 83 | // ... 84 | ``` 85 | 86 | Good luck! 87 | 88 | (Tip: you just have to add one `if`-statement in the `stores/clicks.js` file!) 89 | -------------------------------------------------------------------------------- /exercises/countdown_till_noon/solution/solution.js: -------------------------------------------------------------------------------- 1 | const choo = require('choo') 2 | const html = require('choo/html') 3 | const verify = require('choo-choo/verify') 4 | 5 | const app = choo() 6 | 7 | app.use(function (state, emitter) { 8 | state.clicked = 0 9 | 10 | emitter.on('inc', function () { 11 | state.clicked += 1 12 | if (state.clicked === 5) { 13 | verify(state) 14 | } 15 | }) 16 | }) 17 | 18 | function indexView (state, emit) { 19 | function onClick () { 20 | emit('inc') 21 | } 22 | 23 | return html` 24 | 25 | 26 | 27 | ` 28 | } 29 | 30 | app.route('/', indexView) 31 | app.mount('body') 32 | -------------------------------------------------------------------------------- /i18n/en.json: -------------------------------------------------------------------------------- 1 | { 2 | "title": "choo choo", 3 | "exercises": { 4 | "a cute beginning": { 5 | "response": "Got a response from your file!", 6 | "content_ok": "Your content is valid! Good job!", 7 | "not_html": "Your server doesn't return valid HTML!" 8 | } 9 | }, 10 | "common": { 11 | "exercise": { 12 | "started": "Started your server! URL: http://localhost:{{suffix}}", 13 | "verification": { 14 | "ok": "Verification complete!", 15 | "running": "Your app is live and running!", 16 | "waiting": "Waiting for verification..." 17 | } 18 | } 19 | }, 20 | "installer": { 21 | "no_path": "Please provide a path!", 22 | "progress_1": "Downloading starter kit to {{path}}...", 23 | "progress_2": "Unzipping downloaded archive...", 24 | "progress_3": "Removing leftover .zip file...", 25 | "done": "All done!" 26 | } 27 | } 28 | -------------------------------------------------------------------------------- /i18n/footer/en.md: -------------------------------------------------------------------------------- 1 | To run your solution, execute `choo-choo run`. 2 | 3 | To verify your solution, execute `choo-choo verify`. 4 | -------------------------------------------------------------------------------- /index.js: -------------------------------------------------------------------------------- 1 | const WA = require('workshopper-adventure') 2 | 3 | const cc = WA({ 4 | appDir: __dirname, 5 | languages: ['en'], 6 | header: require('./lib/header'), 7 | footer: require('./lib/footer') 8 | }) 9 | 10 | cc.addAll([ 11 | 'a cute beginning', 12 | 'countdown till noon' 13 | ]) 14 | 15 | module.exports = cc 16 | -------------------------------------------------------------------------------- /lib/bundle_server.js: -------------------------------------------------------------------------------- 1 | const bankai = require('bankai/http') 2 | const getPort = require('get-port') 3 | const http = require('http') 4 | const log = require('./console') 5 | 6 | function setup (mode, cb) { 7 | // Start an Express server that serves the current directory, plus the 8 | // compiled bundle at /bundle.js 9 | const compiler = bankai(process.cwd(), { quiet: true }) 10 | this.bundleServer = http.createServer((req, res) => { 11 | compiler(req, res, () => { 12 | res.statusCode = 404 13 | res.end('not found') 14 | }) 15 | }) 16 | 17 | // Run the server on a random port that is then printed out to the console 18 | getPort().then(port => { 19 | this.bundleServerPort = port 20 | this.bundleServer.listen(port, () => { 21 | const suffix = `${port}/?lang=${this.lang}` 22 | log.info(this.__('started', {suffix})) 23 | // Wait a second just so that it doesn't seem instantaneous 24 | setTimeout(cb, 1000) 25 | }) 26 | }) 27 | } 28 | 29 | function bundleServer (exercise) { 30 | // Set up the server before anything else runs 31 | exercise.addSetup(setup) 32 | return exercise 33 | } 34 | 35 | module.exports = bundleServer 36 | -------------------------------------------------------------------------------- /lib/console.js: -------------------------------------------------------------------------------- 1 | const chalk = require('chalk') 2 | const figures = require('figures') 3 | 4 | module.exports = { 5 | pass (s) { 6 | console.log(chalk`{green ${figures.tick} ${s}}`) 7 | }, 8 | info (s) { 9 | console.log(chalk`{yellow ${figures.play} ${s}}`) 10 | }, 11 | fail (s) { 12 | console.log(chalk`{red ${figures.cross} ${s}}`) 13 | } 14 | } 15 | -------------------------------------------------------------------------------- /lib/footer.js: -------------------------------------------------------------------------------- 1 | const path = require('path') 2 | 3 | module.exports = [ 4 | { text: '---', type: 'md' }, 5 | { file: path.join(__dirname, `../i18n/footer/{lang}.md`) } 6 | ] 7 | -------------------------------------------------------------------------------- /lib/header.js: -------------------------------------------------------------------------------- 1 | module.exports = [ 2 | { text: '# {title}: __{currentExercise.name}__ (_{progress.state_resolved}_)', type: 'md' } 3 | ] 4 | -------------------------------------------------------------------------------- /lib/res_server.js: -------------------------------------------------------------------------------- 1 | const express = require('express') 2 | const bodyParser = require('body-parser') 3 | const ora = require('ora') 4 | 5 | function resServer (exercise, fn) { 6 | exercise.addSetup(function (mode, cb) { 7 | this.resServer = express() 8 | const phrase = mode === 'verify' ? 'verification.waiting' : 'verification.running' 9 | this.spinner = ora(this.__(phrase)) 10 | this.resServer.use(bodyParser.json({ 11 | type: 'text/plain' 12 | })) 13 | fn.bind(this)(mode, cb) 14 | this.resServer.listen(8574, () => { 15 | this.spinner.start() 16 | }) 17 | }) 18 | } 19 | 20 | module.exports = resServer 21 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "choo-choo", 3 | "version": "0.2.2", 4 | "description": "learn choo on the terminal!", 5 | "main": "index.js", 6 | "bin": { 7 | "choo-choo": "./bin/choo-choo" 8 | }, 9 | "scripts": { 10 | "test": "standard | snazzy" 11 | }, 12 | "repository": { 13 | "type": "git", 14 | "url": "git+https://github.com/choojs/choo-choo.git" 15 | }, 16 | "keywords": [ 17 | "choo", 18 | "workshopper", 19 | "nodeschool" 20 | ], 21 | "author": "Olivia Hugger ", 22 | "license": "AGPL-3.0+", 23 | "bugs": { 24 | "url": "https://github.com/choojs/choo-choo/issues" 25 | }, 26 | "homepage": "https://github.com/choojs/choo-choo#readme", 27 | "dependencies": { 28 | "bankai": "9.0.1", 29 | "body-parser": "1.18.2", 30 | "chalk": "2.3.0", 31 | "express": "4.16.2", 32 | "figures": "2.0.0", 33 | "get-port": "3.2.0", 34 | "got": "8.0.0", 35 | "is-html": "1.1.0", 36 | "ora": "1.3.0", 37 | "update-notifier": "2.3.0", 38 | "workshopper-adventure": "6.0.3", 39 | "workshopper-exercise": "3.0.1" 40 | }, 41 | "devDependencies": { 42 | "choo": "6.6.0", 43 | "snazzy": "7.0.0", 44 | "standard": "10.0.3" 45 | } 46 | } 47 | -------------------------------------------------------------------------------- /verify.js: -------------------------------------------------------------------------------- 1 | var success = { 2 | en: 'Congrats! You passed this exercise!' 3 | } 4 | 5 | module.exports = function (state) { 6 | window.fetch('http://localhost:8574/response', { 7 | method: 'POST', 8 | body: JSON.stringify(state), 9 | mode: 'no-cors' 10 | }).then(res => { 11 | const div = document.createElement('div') 12 | div.classList.add('w-100', 'bg-light-green', 'green', 'pv3', 'tc') 13 | div.innerHTML = success[state.query.lang || 'en'] 14 | document.body.prepend(div) 15 | }) 16 | } 17 | --------------------------------------------------------------------------------