├── .gitignore
├── README.md
├── package-lock.json
├── package.json
├── screenshots
    ├── edit_profile_new.png
    ├── explore_new.png
    ├── followers_new.png
    ├── home_new.png
    ├── new_post_new.png
    └── profile_new.png
└── src
    ├── controllers
        ├── auth.js
        ├── post.js
        └── user.js
    ├── middlewares
        ├── asyncHandler.js
        ├── auth.js
        └── errorHandler.js
    ├── models
        ├── Comment.js
        ├── Post.js
        └── User.js
    ├── routes
        ├── auth.js
        ├── post.js
        └── user.js
    ├── seeder.js
    ├── server.js
    └── utils
        └── db.js


/.gitignore:
--------------------------------------------------------------------------------
1 | node_modules/
2 | .env
3 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # Instaclone Backend
 2 | 
 3 | **NOTE: As of 10-06-2022 19:52 IST, I am archiving this repository. It was fun while it lasted.**
 4 | 
 5 | Instagram clone using MERN stack
 6 | 
 7 | This is the backend repo built with Express and MongoDB. If you looking for the frontend repo, [click here](https://github.com/manikandanraji/instaclone-frontend)
 8 | 
 9 | ## Running Locally
10 | 
11 | At the root of the project, you should have a .env with the following contents
12 | 
13 | ```js
14 | JWT_SECRET=<yoursupersecret>
15 | JWT_EXPIRE=30d // or anything you prefer
16 | MONGOURI=<your_mongodb_connection_uri>
17 | ```
18 | 
19 | Then run <code>npm i && npm run dev</code> to start the development server
20 | 
21 | ## Deploying the backend to heroku
22 | 
23 | First create an heroku account and install the heroku cli globally and login
24 | 
25 | ```bash
26 | npm i -g heroku
27 | heroku login
28 | ```
29 | 
30 | Once logged in, create a new heroku application and push it to the remote 'heroku'
31 | 
32 | ```bash
33 | heroku create
34 | git push heroku master
35 | ```
36 | Then we need to manually setup the environmental variables using the heroku dashboard
37 | 
38 | ## UI
39 | 
40 | ### Home 
41 | ![Home](screenshots/home_new.png)
42 | 
43 | ### Explore
44 | ![Explore](screenshots/explore_new.png)
45 | 
46 | 
47 | ### Followers
48 | ![Followers](screenshots/followers_new.png)
49 | 
50 | 
51 | ### Profile
52 | ![Profile](screenshots/profile_new.png)
53 | 
54 | ### Edit Profile
55 | ![Edit Profile](screenshots/edit_profile_new.png)
56 | 
57 | ### New Post
58 | ![New Post](screenshots/new_post_new.png)
59 | 


--------------------------------------------------------------------------------
/package-lock.json:
--------------------------------------------------------------------------------
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1377 |       "version": "5.2.0",
1378 |       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
1379 |       "integrity": "sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==",
1380 |       "requires": {
1381 |         "ansi-regex": "^4.1.0"
1382 |       }
1383 |     },
1384 |     "strip-json-comments": {
1385 |       "version": "2.0.1",
1386 |       "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
1387 |       "integrity": "sha1-PFMZQukIwml8DsNEhYwobHygpgo="
1388 |     },
1389 |     "supports-color": {
1390 |       "version": "5.5.0",
1391 |       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
1392 |       "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
1393 |       "requires": {
1394 |         "has-flag": "^3.0.0"
1395 |       }
1396 |     },
1397 |     "term-size": {
1398 |       "version": "2.2.0",
1399 |       "resolved": "https://registry.npmjs.org/term-size/-/term-size-2.2.0.tgz",
1400 |       "integrity": "sha512-a6sumDlzyHVJWb8+YofY4TW112G6p2FCPEAFk+59gIYHv3XHRhm9ltVQ9kli4hNWeQBwSpe8cRN25x0ROunMOw=="
1401 |     },
1402 |     "to-readable-stream": {
1403 |       "version": "1.0.0",
1404 |       "resolved": "https://registry.npmjs.org/to-readable-stream/-/to-readable-stream-1.0.0.tgz",
1405 |       "integrity": "sha512-Iq25XBt6zD5npPhlLVXGFN3/gyR2/qODcKNNyTMd4vbm39HUaOiAM4PMq0eMVC/Tkxz+Zjdsc55g9yyz+Yq00Q=="
1406 |     },
1407 |     "to-regex-range": {
1408 |       "version": "5.0.1",
1409 |       "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
1410 |       "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
1411 |       "requires": {
1412 |         "is-number": "^7.0.0"
1413 |       }
1414 |     },
1415 |     "toidentifier": {
1416 |       "version": "1.0.0",
1417 |       "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.0.tgz",
1418 |       "integrity": "sha512-yaOH/Pk/VEhBWWTlhI+qXxDFXlejDGcQipMlyxda9nthulaxLZUNcUqFxokp0vcYnvteJln5FNQDRrxj3YcbVw=="
1419 |     },
1420 |     "touch": {
1421 |       "version": "3.1.0",
1422 |       "resolved": "https://registry.npmjs.org/touch/-/touch-3.1.0.tgz",
1423 |       "integrity": "sha512-WBx8Uy5TLtOSRtIq+M03/sKDrXCLHxwDcquSP2c43Le03/9serjQBIztjRz6FkJez9D/hleyAXTBGLwwZUw9lA==",
1424 |       "requires": {
1425 |         "nopt": "~1.0.10"
1426 |       }
1427 |     },
1428 |     "type-fest": {
1429 |       "version": "0.8.1",
1430 |       "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.8.1.tgz",
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1432 |     },
1433 |     "type-is": {
1434 |       "version": "1.6.18",
1435 |       "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
1436 |       "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
1437 |       "requires": {
1438 |         "media-typer": "0.3.0",
1439 |         "mime-types": "~2.1.24"
1440 |       }
1441 |     },
1442 |     "typedarray-to-buffer": {
1443 |       "version": "3.1.5",
1444 |       "resolved": "https://registry.npmjs.org/typedarray-to-buffer/-/typedarray-to-buffer-3.1.5.tgz",
1445 |       "integrity": "sha512-zdu8XMNEDepKKR+XYOXAVPtWui0ly0NtohUscw+UmaHiAWT8hrV1rr//H6V+0DvJ3OQ19S979M0laLfX8rm82Q==",
1446 |       "requires": {
1447 |         "is-typedarray": "^1.0.0"
1448 |       }
1449 |     },
1450 |     "undefsafe": {
1451 |       "version": "2.0.3",
1452 |       "resolved": "https://registry.npmjs.org/undefsafe/-/undefsafe-2.0.3.tgz",
1453 |       "integrity": "sha512-nrXZwwXrD/T/JXeygJqdCO6NZZ1L66HrxM/Z7mIq2oPanoN0F1nLx3lwJMu6AwJY69hdixaFQOuoYsMjE5/C2A==",
1454 |       "requires": {
1455 |         "debug": "^2.2.0"
1456 |       }
1457 |     },
1458 |     "unique-string": {
1459 |       "version": "2.0.0",
1460 |       "resolved": "https://registry.npmjs.org/unique-string/-/unique-string-2.0.0.tgz",
1461 |       "integrity": "sha512-uNaeirEPvpZWSgzwsPGtU2zVSTrn/8L5q/IexZmH0eH6SA73CmAA5U4GwORTxQAZs95TAXLNqeLoPPNO5gZfWg==",
1462 |       "requires": {
1463 |         "crypto-random-string": "^2.0.0"
1464 |       }
1465 |     },
1466 |     "unpipe": {
1467 |       "version": "1.0.0",
1468 |       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
1469 |       "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
1470 |     },
1471 |     "update-notifier": {
1472 |       "version": "4.1.0",
1473 |       "resolved": "https://registry.npmjs.org/update-notifier/-/update-notifier-4.1.0.tgz",
1474 |       "integrity": "sha512-w3doE1qtI0/ZmgeoDoARmI5fjDoT93IfKgEGqm26dGUOh8oNpaSTsGNdYRN/SjOuo10jcJGwkEL3mroKzktkew==",
1475 |       "requires": {
1476 |         "boxen": "^4.2.0",
1477 |         "chalk": "^3.0.0",
1478 |         "configstore": "^5.0.1",
1479 |         "has-yarn": "^2.1.0",
1480 |         "import-lazy": "^2.1.0",
1481 |         "is-ci": "^2.0.0",
1482 |         "is-installed-globally": "^0.3.1",
1483 |         "is-npm": "^4.0.0",
1484 |         "is-yarn-global": "^0.3.0",
1485 |         "latest-version": "^5.0.0",
1486 |         "pupa": "^2.0.1",
1487 |         "semver-diff": "^3.1.1",
1488 |         "xdg-basedir": "^4.0.0"
1489 |       }
1490 |     },
1491 |     "url-parse-lax": {
1492 |       "version": "3.0.0",
1493 |       "resolved": "https://registry.npmjs.org/url-parse-lax/-/url-parse-lax-3.0.0.tgz",
1494 |       "integrity": "sha1-FrXK/Afb42dsGxmZF3gj1lA6yww=",
1495 |       "requires": {
1496 |         "prepend-http": "^2.0.0"
1497 |       }
1498 |     },
1499 |     "util-deprecate": {
1500 |       "version": "1.0.2",
1501 |       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
1502 |       "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
1503 |     },
1504 |     "utils-merge": {
1505 |       "version": "1.0.1",
1506 |       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
1507 |       "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
1508 |     },
1509 |     "vary": {
1510 |       "version": "1.1.2",
1511 |       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
1512 |       "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
1513 |     },
1514 |     "widest-line": {
1515 |       "version": "3.1.0",
1516 |       "resolved": "https://registry.npmjs.org/widest-line/-/widest-line-3.1.0.tgz",
1517 |       "integrity": "sha512-NsmoXalsWVDMGupxZ5R08ka9flZjjiLvHVAWYOKtiKM8ujtZWr9cRffak+uSE48+Ob8ObalXpwyeUiyDD6QFgg==",
1518 |       "requires": {
1519 |         "string-width": "^4.0.0"
1520 |       }
1521 |     },
1522 |     "wrappy": {
1523 |       "version": "1.0.2",
1524 |       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
1525 |       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
1526 |     },
1527 |     "write-file-atomic": {
1528 |       "version": "3.0.3",
1529 |       "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-3.0.3.tgz",
1530 |       "integrity": "sha512-AvHcyZ5JnSfq3ioSyjrBkH9yW4m7Ayk8/9My/DD9onKeu/94fwrMocemO2QAJFAlnnDN+ZDS+ZjAR5ua1/PV/Q==",
1531 |       "requires": {
1532 |         "imurmurhash": "^0.1.4",
1533 |         "is-typedarray": "^1.0.0",
1534 |         "signal-exit": "^3.0.2",
1535 |         "typedarray-to-buffer": "^3.1.5"
1536 |       }
1537 |     },
1538 |     "xdg-basedir": {
1539 |       "version": "4.0.0",
1540 |       "resolved": "https://registry.npmjs.org/xdg-basedir/-/xdg-basedir-4.0.0.tgz",
1541 |       "integrity": "sha512-PSNhEJDejZYV7h50BohL09Er9VaIefr2LMAf3OEmpCkjOi34eYyQYAXUTjEQtZJTKcF0E2UKTh+osDLsgNim9Q=="
1542 |     }
1543 |   }
1544 | }
1545 | 


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/package.json:
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 1 | {
 2 |   "name": "instaclone-backend",
 3 |   "version": "1.0.0",
 4 |   "description": "Instaclone backend using Express, MongoDB",
 5 |   "main": "src/server.js",
 6 |   "scripts": {
 7 |     "start": "NODE_ENV=production node src/server",
 8 |     "dev": "nodemon src/server"
 9 |   },
10 |   "author": "Manikandan Raji",
11 |   "license": "MIT",
12 |   "dependencies": {
13 |     "bcryptjs": "^2.4.3",
14 |     "cors": "^2.8.5",
15 |     "dotenv": "^8.2.0",
16 |     "express": "^4.17.1",
17 |     "jsonwebtoken": "^8.5.1",
18 |     "mongoose": "^5.9.19",
19 |     "nodemon": "^2.0.4"
20 |   }
21 | }
22 | 


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/src/controllers/auth.js:
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 1 | const User = require("../models/User");
 2 | const asyncHandler = require("../middlewares/asyncHandler");
 3 | 
 4 | exports.login = asyncHandler(async (req, res, next) => {
 5 |   const { email, password } = req.body;
 6 | 
 7 |   // make sure the email, pw is not empty
 8 |   if (!email || !password) {
 9 |     return next({
10 |       message: "Please provide email and password",
11 |       statusCode: 400,
12 |     });
13 |   }
14 | 
15 |   // check if the user exists
16 |   const user = await User.findOne({ email });
17 | 
18 |   if (!user) {
19 |     return next({
20 |       message: "The email is not yet registered to an accout",
21 |       statusCode: 400,
22 |     });
23 |   }
24 | 
25 |   // if exists, make sure the password matches
26 |   const match = await user.checkPassword(password);
27 | 
28 |   if (!match) {
29 |     return next({ message: "The password does not match", statusCode: 400 });
30 |   }
31 |   const token = user.getJwtToken();
32 | 
33 |   // then send json web token as response
34 |   res.status(200).json({ success: true, token });
35 | });
36 | 
37 | exports.signup = asyncHandler(async (req, res, next) => {
38 |   const { fullname, username, email, password } = req.body;
39 | 
40 |   const user = await User.create({ fullname, username, email, password });
41 | 
42 |   const token = user.getJwtToken();
43 | 
44 |   res.status(200).json({ success: true, token });
45 | });
46 | 
47 | exports.me = asyncHandler(async (req, res, next) => {
48 |   const { avatar, username, fullname, email, _id, website, bio } = req.user;
49 | 
50 |   res
51 |     .status(200)
52 |     .json({
53 |       success: true,
54 |       data: { avatar, username, fullname, email, _id, website, bio },
55 |     });
56 | });
57 | 


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/src/controllers/post.js:
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  1 | const mongoose = require("mongoose");
  2 | const Post = require("../models/Post");
  3 | const User = require("../models/User");
  4 | const Comment = require("../models/Comment");
  5 | const asyncHandler = require("../middlewares/asyncHandler");
  6 | 
  7 | exports.getPosts = asyncHandler(async (req, res, next) => {
  8 |   const posts = await Post.find();
  9 | 
 10 |   res.status(200).json({ success: true, data: posts });
 11 | });
 12 | 
 13 | exports.getPost = asyncHandler(async (req, res, next) => {
 14 |   const post = await Post.findById(req.params.id)
 15 |     .populate({
 16 |       path: "comments",
 17 |       select: "text",
 18 |       populate: {
 19 |         path: "user",
 20 |         select: "username avatar",
 21 |       },
 22 |     })
 23 |     .populate({
 24 |       path: "user",
 25 |       select: "username avatar",
 26 |     })
 27 |     .lean()
 28 |     .exec();
 29 | 
 30 |   if (!post) {
 31 |     return next({
 32 |       message: `No post found for id ${req.params.id}`,
 33 |       statusCode: 404,
 34 |     });
 35 |   }
 36 | 
 37 |   // is the post belongs to loggedin user?
 38 |   post.isMine = req.user.id === post.user._id.toString();
 39 | 
 40 |   // is the loggedin user liked the post??
 41 |   const likes = post.likes.map((like) => like.toString());
 42 |   post.isLiked = likes.includes(req.user.id);
 43 | 
 44 |   // is the loggedin user liked the post??
 45 |   const savedPosts = req.user.savedPosts.map((post) => post.toString());
 46 |   post.isSaved = savedPosts.includes(req.params.id);
 47 | 
 48 |   // is the comment on the post belongs to the logged in user?
 49 |   post.comments.forEach((comment) => {
 50 |     comment.isCommentMine = false;
 51 | 
 52 |     const userStr = comment.user._id.toString();
 53 |     if (userStr === req.user.id) {
 54 |       comment.isCommentMine = true;
 55 |     }
 56 |   });
 57 | 
 58 |   res.status(200).json({ success: true, data: post });
 59 | });
 60 | 
 61 | exports.deletePost = asyncHandler(async (req, res, next) => {
 62 |   const post = await Post.findById(req.params.id);
 63 | 
 64 |   if (!post) {
 65 |     return next({
 66 |       message: `No post found for id ${req.params.id}`,
 67 |       statusCode: 404,
 68 |     });
 69 |   }
 70 | 
 71 |   if (post.user.toString() !== req.user.id) {
 72 |     return next({
 73 |       message: "You are not authorized to delete this post",
 74 |       statusCode: 401,
 75 |     });
 76 |   }
 77 | 
 78 |   await User.findByIdAndUpdate(req.user.id, {
 79 |     $pull: { posts: req.params.id },
 80 |     $inc: { postCount: -1 },
 81 |   });
 82 | 
 83 |   await post.remove();
 84 | 
 85 |   res.status(200).json({ success: true, data: {} });
 86 | });
 87 | 
 88 | exports.addPost = asyncHandler(async (req, res, next) => {
 89 |   const { caption, files, tags } = req.body;
 90 |   const user = req.user.id;
 91 | 
 92 |   let post = await Post.create({ caption, files, tags, user });
 93 | 
 94 |   await User.findByIdAndUpdate(req.user.id, {
 95 |     $push: { posts: post._id },
 96 |     $inc: { postCount: 1 },
 97 |   });
 98 | 
 99 |   post = await post
100 |     .populate({ path: "user", select: "avatar username fullname" })
101 |     .execPopulate();
102 | 
103 |   res.status(200).json({ success: true, data: post });
104 | });
105 | 
106 | exports.toggleLike = asyncHandler(async (req, res, next) => {
107 |   // make sure that the post exists
108 |   const post = await Post.findById(req.params.id);
109 | 
110 |   if (!post) {
111 |     return next({
112 |       message: `No post found for id ${req.params.id}`,
113 |       statusCode: 404,
114 |     });
115 |   }
116 | 
117 |   if (post.likes.includes(req.user.id)) {
118 |     const index = post.likes.indexOf(req.user.id);
119 |     post.likes.splice(index, 1);
120 |     post.likesCount = post.likesCount - 1;
121 |     await post.save();
122 |   } else {
123 |     post.likes.push(req.user.id);
124 |     post.likesCount = post.likesCount + 1;
125 |     await post.save();
126 |   }
127 | 
128 |   res.status(200).json({ success: true, data: {} });
129 | });
130 | 
131 | exports.addComment = asyncHandler(async (req, res, next) => {
132 |   const post = await Post.findById(req.params.id);
133 | 
134 |   if (!post) {
135 |     return next({
136 |       message: `No post found for id ${req.params.id}`,
137 |       statusCode: 404,
138 |     });
139 |   }
140 | 
141 |   let comment = await Comment.create({
142 |     user: req.user.id,
143 |     post: req.params.id,
144 |     text: req.body.text,
145 |   });
146 | 
147 |   post.comments.push(comment._id);
148 |   post.commentsCount = post.commentsCount + 1;
149 |   await post.save();
150 | 
151 |   comment = await comment
152 |     .populate({ path: "user", select: "avatar username fullname" })
153 |     .execPopulate();
154 | 
155 |   res.status(200).json({ success: true, data: comment });
156 | });
157 | 
158 | exports.deleteComment = asyncHandler(async (req, res, next) => {
159 |   const post = await Post.findById(req.params.id);
160 | 
161 |   if (!post) {
162 |     return next({
163 |       message: `No post found for id ${req.params.id}`,
164 |       statusCode: 404,
165 |     });
166 |   }
167 | 
168 |   const comment = await Comment.findOne({
169 |     _id: req.params.commentId,
170 |     post: req.params.id,
171 |   });
172 | 
173 |   if (!comment) {
174 |     return next({
175 |       message: `No comment found for id ${req.params.id}`,
176 |       statusCode: 404,
177 |     });
178 |   }
179 | 
180 |   if (comment.user.toString() !== req.user.id) {
181 |     return next({
182 |       message: "You are not authorized to delete this comment",
183 |       statusCode: 401,
184 |     });
185 |   }
186 | 
187 |   // remove the comment from the post
188 |   const index = post.comments.indexOf(comment._id);
189 |   post.comments.splice(index, 1);
190 |   post.commentsCount = post.commentsCount - 1;
191 |   await post.save();
192 | 
193 |   await comment.remove();
194 | 
195 |   res.status(200).json({ success: true, data: {} });
196 | });
197 | 
198 | exports.searchPost = asyncHandler(async (req, res, next) => {
199 |   if (!req.query.caption && !req.query.tag) {
200 |     return next({
201 |       message: "Please enter either caption or tag to search for",
202 |       statusCode: 400,
203 |     });
204 |   }
205 | 
206 |   let posts = [];
207 | 
208 |   if (req.query.caption) {
209 |     const regex = new RegExp(req.query.caption, "i");
210 |     posts = await Post.find({ caption: regex });
211 |   }
212 | 
213 |   if (req.query.tag) {
214 |     posts = posts.concat([await Post.find({ tags: req.query.tag })]);
215 |   }
216 | 
217 |   res.status(200).json({ success: true, data: posts });
218 | });
219 | 
220 | exports.toggleSave = asyncHandler(async (req, res, next) => {
221 |   // make sure that the post exists
222 |   const post = await Post.findById(req.params.id);
223 | 
224 |   if (!post) {
225 |     return next({
226 |       message: `No post found for id ${req.params.id}`,
227 |       statusCode: 404,
228 |     });
229 |   }
230 | 
231 |   const { user } = req;
232 | 
233 |   if (user.savedPosts.includes(req.params.id)) {
234 |     console.log("removing saved post");
235 |     await User.findByIdAndUpdate(user.id, {
236 |       $pull: { savedPosts: req.params.id },
237 |     });
238 |   } else {
239 |     console.log("saving post");
240 |     await User.findByIdAndUpdate(user.id, {
241 |       $push: { savedPosts: req.params.id },
242 |     });
243 |   }
244 | 
245 |   res.status(200).json({ success: true, data: {} });
246 | });
247 | 


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/src/controllers/user.js:
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  1 | const User = require("../models/User");
  2 | const Post = require("../models/Post");
  3 | const asyncHandler = require("../middlewares/asyncHandler");
  4 | 
  5 | exports.getUsers = asyncHandler(async (req, res, next) => {
  6 |   let users = await User.find().select("-password").lean().exec();
  7 | 
  8 |   users.forEach((user) => {
  9 |     user.isFollowing = false;
 10 |     const followers = user.followers.map((follower) => follower._id.toString());
 11 |     if (followers.includes(req.user.id)) {
 12 |       user.isFollowing = true;
 13 |     }
 14 |   });
 15 | 
 16 |   users = users.filter((user) => user._id.toString() !== req.user.id);
 17 | 
 18 |   res.status(200).json({ success: true, data: users });
 19 | });
 20 | 
 21 | exports.getUser = asyncHandler(async (req, res, next) => {
 22 |   const user = await User.findOne({ username: req.params.username })
 23 |     .select("-password")
 24 |     .populate({ path: "posts", select: "files commentsCount likesCount" })
 25 |     .populate({ path: "savedPosts", select: "files commentsCount likesCount" })
 26 |     .populate({ path: "followers", select: "avatar username fullname" })
 27 |     .populate({ path: "following", select: "avatar username fullname" })
 28 |     .lean()
 29 |     .exec();
 30 | 
 31 |   if (!user) {
 32 |     return next({
 33 |       message: `The user ${req.params.username} is not found`,
 34 |       statusCode: 404,
 35 |     });
 36 |   }
 37 | 
 38 |   user.isFollowing = false;
 39 |   const followers = user.followers.map((follower) => follower._id.toString());
 40 | 
 41 |   user.followers.forEach((follower) => {
 42 |     follower.isFollowing = false;
 43 |     if (req.user.following.includes(follower._id.toString())) {
 44 |       follower.isFollowing = true;
 45 |     }
 46 |   });
 47 | 
 48 |   user.following.forEach((user) => {
 49 |     user.isFollowing = false;
 50 |     if (req.user.following.includes(user._id.toString())) {
 51 |       user.isFollowing = true;
 52 |     }
 53 |   });
 54 | 
 55 |   if (followers.includes(req.user.id)) {
 56 |     user.isFollowing = true;
 57 |   }
 58 | 
 59 |   user.isMe = req.user.id === user._id.toString();
 60 | 
 61 |   res.status(200).json({ success: true, data: user });
 62 | });
 63 | 
 64 | exports.follow = asyncHandler(async (req, res, next) => {
 65 |   // make sure the user exists
 66 |   const user = await User.findById(req.params.id);
 67 | 
 68 |   if (!user) {
 69 |     return next({
 70 |       message: `No user found for id ${req.params.id}`,
 71 |       statusCode: 404,
 72 |     });
 73 |   }
 74 | 
 75 |   // make the sure the user is not the logged in user
 76 |   if (req.params.id === req.user.id) {
 77 |     return next({ message: "You can't unfollow/follow yourself", status: 400 });
 78 |   }
 79 | 
 80 |   // only follow if the user is not following already
 81 |   if (user.followers.includes(req.user.id)) {
 82 |     return next({ message: "You are already following him", status: 400 });
 83 |   }
 84 | 
 85 |   await User.findByIdAndUpdate(req.params.id, {
 86 |     $push: { followers: req.user.id },
 87 |     $inc: { followersCount: 1 },
 88 |   });
 89 |   await User.findByIdAndUpdate(req.user.id, {
 90 |     $push: { following: req.params.id },
 91 |     $inc: { followingCount: 1 },
 92 |   });
 93 | 
 94 |   res.status(200).json({ success: true, data: {} });
 95 | });
 96 | 
 97 | exports.unfollow = asyncHandler(async (req, res, next) => {
 98 |   const user = await User.findById(req.params.id);
 99 | 
100 |   if (!user) {
101 |     return next({
102 |       message: `No user found for ID ${req.params.id}`,
103 |       statusCode: 404,
104 |     });
105 |   }
106 | 
107 |   // make the sure the user is not the logged in user
108 |   if (req.params.id === req.user.id) {
109 |     return next({ message: "You can't follow/unfollow yourself", status: 400 });
110 |   }
111 | 
112 |   await User.findByIdAndUpdate(req.params.id, {
113 |     $pull: { followers: req.user.id },
114 |     $inc: { followersCount: -1 },
115 |   });
116 |   await User.findByIdAndUpdate(req.user.id, {
117 |     $pull: { following: req.params.id },
118 |     $inc: { followingCount: -1 },
119 |   });
120 | 
121 |   res.status(200).json({ success: true, data: {} });
122 | });
123 | 
124 | exports.feed = asyncHandler(async (req, res, next) => {
125 |   const following = req.user.following;
126 | 
127 |   const users = await User.find()
128 |     .where("_id")
129 |     .in(following.concat([req.user.id]))
130 |     .exec();
131 | 
132 |   const postIds = users.map((user) => user.posts).flat();
133 | 
134 |   const posts = await Post.find()
135 |     .populate({
136 |       path: "comments",
137 |       select: "text",
138 |       populate: { path: "user", select: "avatar fullname username" },
139 |     })
140 |     .populate({ path: "user", select: "avatar fullname username" })
141 |     .sort("-createdAt")
142 |     .where("_id")
143 |     .in(postIds)
144 |     .lean()
145 |     .exec();
146 | 
147 |   posts.forEach((post) => {
148 |     // is the loggedin user liked the post
149 |     post.isLiked = false;
150 |     const likes = post.likes.map((like) => like.toString());
151 |     if (likes.includes(req.user.id)) {
152 |       post.isLiked = true;
153 |     }
154 | 
155 |     // is the loggedin saved this post
156 |     post.isSaved = false;
157 |     const savedPosts = req.user.savedPosts.map((post) => post.toString());
158 |     if (savedPosts.includes(post._id)) {
159 |       post.isSaved = true;
160 |     }
161 | 
162 |     // is the post belongs to the loggedin user
163 |     post.isMine = false;
164 |     if (post.user._id.toString() === req.user.id) {
165 |       post.isMine = true;
166 |     }
167 | 
168 |     // is the comment belongs to the loggedin user
169 |     post.comments.map((comment) => {
170 |       comment.isCommentMine = false;
171 |       if (comment.user._id.toString() === req.user.id) {
172 |         comment.isCommentMine = true;
173 |       }
174 |     });
175 |   });
176 | 
177 |   res.status(200).json({ success: true, data: posts });
178 | });
179 | 
180 | exports.searchUser = asyncHandler(async (req, res, next) => {
181 |   if (!req.query.username) {
182 |     return next({ message: "The username cannot be empty", statusCode: 400 });
183 |   }
184 | 
185 |   const regex = new RegExp(req.query.username, "i");
186 |   const users = await User.find({ username: regex });
187 | 
188 |   res.status(200).json({ success: true, data: users });
189 | });
190 | 
191 | exports.editUser = asyncHandler(async (req, res, next) => {
192 |   const { avatar, username, fullname, website, bio, email } = req.body;
193 | 
194 |   const fieldsToUpdate = {};
195 |   if (avatar) fieldsToUpdate.avatar = avatar;
196 |   if (username) fieldsToUpdate.username = username;
197 |   if (fullname) fieldsToUpdate.fullname = fullname;
198 |   if (email) fieldsToUpdate.email = email;
199 | 
200 |   const user = await User.findByIdAndUpdate(
201 |     req.user.id,
202 |     {
203 |       $set: { ...fieldsToUpdate, website, bio },
204 |     },
205 |     {
206 |       new: true,
207 |       runValidators: true,
208 |     }
209 |   ).select("avatar username fullname email bio website");
210 | 
211 |   res.status(200).json({ success: true, data: user });
212 | });
213 | 


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/src/middlewares/asyncHandler.js:
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1 | const asyncHandler = (fn) => (req, res, next) =>
2 |   Promise.resolve(fn(req, res, next)).catch(next);
3 | 
4 | module.exports = asyncHandler;
5 | 


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/src/middlewares/auth.js:
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 1 | const jwt = require("jsonwebtoken");
 2 | const User = require("../models/User");
 3 | 
 4 | exports.protect = async (req, res, next) => {
 5 |   let token;
 6 | 
 7 |   if (
 8 |     req.headers.authorization &&
 9 |     req.headers.authorization.startsWith("Bearer")
10 |   ) {
11 |     token = req.headers.authorization.split(" ")[1];
12 |   }
13 | 
14 |   if (!token) {
15 |     return next({
16 |       message: "You need to be logged in to visit this route",
17 |       statusCode: 403,
18 |     });
19 |   }
20 | 
21 |   try {
22 |     const decoded = jwt.verify(token, process.env.JWT_SECRET);
23 | 
24 |     const user = await User.findById(decoded.id).select("-password");
25 | 
26 |     if (!user) {
27 |       return next({ message: `No user found for ID ${decoded.id}` });
28 |     }
29 | 
30 |     req.user = user;
31 |     next();
32 |   } catch (err) {
33 |     next({
34 |       message: "You need to be logged in to visit this route",
35 |       statusCode: 403,
36 |     });
37 |   }
38 | };
39 | 


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/src/middlewares/errorHandler.js:
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 1 | const errorHandler = (err, req, res, next) => {
 2 |   console.log(err);
 3 | 
 4 |   let message = err.message || "Internal server error";
 5 |   let statusCode = err.statusCode || 500;
 6 | 
 7 |   if (err.code === 11000) {
 8 |     message = "Duplicate key";
 9 | 
10 |     if (err.keyValue.email) {
11 |       message = "The email is already taken";
12 |     }
13 | 
14 |     if (err.keyValue.username) {
15 |       message = "The username is already taken";
16 |     }
17 | 
18 |     statusCode = 400;
19 |   }
20 | 
21 |   if (err.name === "ValidationError") {
22 |     const fields = Object.keys(err.errors);
23 | 
24 |     fields.map((field) => {
25 |       if (err.errors[field].kind === "maxlength") {
26 |         message = "Password should be maximum of 12 characters";
27 |       } else {
28 |         message = "Password should be minimum of 6 characters";
29 |       }
30 |     });
31 | 
32 |     statusCode = 400;
33 |   }
34 | 
35 |   if (err.name === "CastError") {
36 |     message = "The ObjectID is malformed";
37 |     statusCode = 400;
38 |   }
39 | 
40 |   res.status(statusCode).json({ success: false, message });
41 | };
42 | 
43 | module.exports = errorHandler;
44 | 


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/src/models/Comment.js:
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 1 | const mongoose = require("mongoose");
 2 | 
 3 | const CommentSchema = new mongoose.Schema({
 4 |   user: {
 5 |     type: mongoose.Schema.ObjectId,
 6 |     ref: "User",
 7 |     required: true,
 8 |   },
 9 |   post: {
10 |     type: mongoose.Schema.ObjectId,
11 |     ref: "Post",
12 |     required: true,
13 |   },
14 |   text: {
15 |     type: String,
16 |     required: [true, "Please enter the comment"],
17 |     trim: true,
18 |   },
19 |   createdAt: {
20 |     type: Date,
21 |     default: Date.now,
22 |   },
23 | });
24 | 
25 | module.exports = mongoose.model("Comment", CommentSchema);
26 | 


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/src/models/Post.js:
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 1 | const mongoose = require("mongoose");
 2 | 
 3 | const PostSchema = new mongoose.Schema({
 4 |   user: {
 5 |     type: mongoose.Schema.ObjectId,
 6 |     ref: "User",
 7 |     required: true,
 8 |   },
 9 |   caption: {
10 |     type: String,
11 |     required: [true, "Please enter the caption"],
12 |     trim: true,
13 |   },
14 |   tags: {
15 |     type: [String],
16 |   },
17 |   files: {
18 |     type: [String],
19 |     validate: (v) => v === null || v.length > 0,
20 |   },
21 |   likes: [{ type: mongoose.Schema.ObjectId, ref: "User" }],
22 |   likesCount: {
23 |     type: Number,
24 |     default: 0,
25 |   },
26 |   comments: [{ type: mongoose.Schema.ObjectId, ref: "Comment" }],
27 |   commentsCount: {
28 |     type: Number,
29 |     default: 0,
30 |   },
31 |   createdAt: {
32 |     type: Date,
33 |     default: Date.now,
34 |   },
35 | });
36 | 
37 | module.exports = mongoose.model("Post", PostSchema);
38 | 


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/src/models/User.js:
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 1 | const mongoose = require("mongoose");
 2 | const jwt = require("jsonwebtoken");
 3 | const bcrypt = require("bcryptjs");
 4 | 
 5 | const UserSchema = new mongoose.Schema({
 6 |   fullname: {
 7 |     type: String,
 8 |     required: [true, "Please enter your fullname"],
 9 |     trim: true,
10 |   },
11 |   username: {
12 |     type: String,
13 |     required: [true, "Please enter your username"],
14 |     trim: true,
15 |     unique: true,
16 |   },
17 |   email: {
18 |     type: String,
19 |     required: [true, "Please enter your email"],
20 |     trim: true,
21 |     lowercase: true,
22 |     unique: true,
23 |   },
24 |   password: {
25 |     type: String,
26 |     required: [true, "Please enter your password"],
27 |     minlength: [6, "Password should be atleast minimum of 6 characters"],
28 |     maxlength: [12, "Password should be maximum of 12 characters"],
29 |   },
30 |   avatar: {
31 |     type: String,
32 |     default:
33 |       "https://res.cloudinary.com/tylerdurden/image/upload/v1602657481/random/pngfind.com-default-image-png-6764065_krremh.png",
34 |   },
35 |   bio: String,
36 |   website: String,
37 |   followers: [{ type: mongoose.Schema.ObjectId, ref: "User" }],
38 |   followersCount: {
39 |     type: Number,
40 |     default: 0,
41 |   },
42 |   followingCount: {
43 |     type: Number,
44 |     default: 0,
45 |   },
46 |   following: [{ type: mongoose.Schema.ObjectId, ref: "User" }],
47 |   posts: [{ type: mongoose.Schema.ObjectId, ref: "Post" }],
48 |   postCount: {
49 |     type: Number,
50 |     default: 0,
51 |   },
52 |   savedPosts: [{ type: mongoose.Schema.ObjectId, ref: "Post" }],
53 |   createdAt: {
54 |     type: Date,
55 |     default: Date.now,
56 |   },
57 | });
58 | 
59 | UserSchema.pre("save", async function (next) {
60 |   const salt = await bcrypt.genSalt(10);
61 |   this.password = await bcrypt.hash(this.password, salt);
62 |   next();
63 | });
64 | 
65 | UserSchema.methods.getJwtToken = function () {
66 |   return jwt.sign({ id: this._id }, process.env.JWT_SECRET, {
67 |     expiresIn: process.env.JWT_EXPIRE,
68 |   });
69 | };
70 | 
71 | UserSchema.methods.checkPassword = async function (password) {
72 |   return await bcrypt.compare(password, this.password);
73 | };
74 | 
75 | module.exports = mongoose.model("User", UserSchema);
76 | 


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/src/routes/auth.js:
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 1 | const express = require("express");
 2 | const router = express.Router();
 3 | const { login, signup, me } = require("../controllers/auth");
 4 | const { protect } = require("../middlewares/auth");
 5 | 
 6 | router.route("/signup").post(signup);
 7 | router.route("/login").post(login);
 8 | router.route("/me").get(protect, me);
 9 | 
10 | module.exports = router;
11 | 


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/src/routes/post.js:
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 1 | const express = require("express");
 2 | const router = express.Router();
 3 | const {
 4 |   getPosts,
 5 |   getPost,
 6 |   addPost,
 7 |   deletePost,
 8 |   toggleLike,
 9 |   toggleSave,
10 |   addComment,
11 |   deleteComment,
12 |   searchPost,
13 | } = require("../controllers/post");
14 | const { protect } = require("../middlewares/auth");
15 | 
16 | router.route("/").get(getPosts).post(protect, addPost);
17 | router.route("/search").get(searchPost);
18 | router.route("/:id").get(protect, getPost).delete(protect, deletePost);
19 | router.route("/:id/togglelike").get(protect, toggleLike);
20 | router.route("/:id/togglesave").get(protect, toggleSave);
21 | router.route("/:id/comments").post(protect, addComment);
22 | router.route("/:id/comments/:commentId").delete(protect, deleteComment);
23 | 
24 | module.exports = router;
25 | 


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/src/routes/user.js:
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 1 | const express = require("express");
 2 | const router = express.Router();
 3 | const {
 4 |   getUsers,
 5 |   getUser,
 6 |   follow,
 7 |   unfollow,
 8 |   feed,
 9 |   searchUser,
10 |   editUser,
11 | } = require("../controllers/user");
12 | const { protect } = require("../middlewares/auth");
13 | 
14 | router.route("/").get(protect, getUsers);
15 | router.route("/").put(protect, editUser);
16 | router.route("/feed").get(protect, feed);
17 | router.route("/search").get(searchUser);
18 | router.route("/:username").get(protect, getUser);
19 | router.route("/:id/follow").get(protect, follow);
20 | router.route("/:id/unfollow").get(protect, unfollow);
21 | 
22 | module.exports = router;
23 | 


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/src/seeder.js:
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 1 | require("dotenv").config();
 2 | const mongoose = require("mongoose");
 3 | const User = require("./models/User");
 4 | const Comment = require("./models/Comment");
 5 | const Post = require("./models/Post");
 6 | 
 7 | mongoose.connect(process.env.MONGOURI, {
 8 |   useCreateIndex: true,
 9 |   useNewUrlParser: true,
10 |   useUnifiedTopology: true,
11 |   useFindAndModify: false,
12 | });
13 | 
14 | const deleteData = async () => {
15 |   try {
16 |     await User.deleteMany();
17 |     await Comment.deleteMany();
18 |     await Post.deleteMany();
19 |     console.log("Deleted data...");
20 |     process.exit();
21 |   } catch (err) {
22 |     console.error(err);
23 |   }
24 | };
25 | 
26 | if (process.argv[2] === "-d") {
27 |   deleteData();
28 | } else {
29 |   console.log("not enough arguments");
30 |   process.exit(1);
31 | }
32 | 


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/src/server.js:
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 1 | require("dotenv").config();
 2 | const express = require("express");
 3 | const cors = require("cors");
 4 | const auth = require("./routes/auth");
 5 | const user = require("./routes/user");
 6 | const post = require("./routes/post");
 7 | const connectToDb = require("./utils/db");
 8 | const errorHandler = require("./middlewares/errorHandler");
 9 | 
10 | const app = express();
11 | 
12 | connectToDb();
13 | app.use(express.json());
14 | app.use(cors());
15 | 
16 | app.use("/api/v1/auth", auth);
17 | app.use("/api/v1/users", user);
18 | app.use("/api/v1/posts", post);
19 | 
20 | app.use(errorHandler);
21 | 
22 | const PORT = process.env.PORT || 5000;
23 | app.listen(
24 |   PORT,
25 |   console.log(`server started in ${process.env.NODE_ENV} mode at port ${PORT}`)
26 | );
27 | 


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/src/utils/db.js:
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 1 | const mongoose = require("mongoose");
 2 | 
 3 | const connectToDb = async () => {
 4 |   try {
 5 |     const connection = await mongoose.connect(process.env.MONGOURI, {
 6 |       useCreateIndex: true,
 7 |       useNewUrlParser: true,
 8 |       useUnifiedTopology: true,
 9 |       useFindAndModify: false,
10 |     });
11 | 
12 |     console.log(`Connected to database ${connection.connections[0].name}`);
13 |   } catch (err) {
14 |     console.error(err);
15 |   }
16 | };
17 | 
18 | module.exports = connectToDb;
19 | 


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