fix

lab3/node_modules/json-server/lib/cli/bin.js

@@ -0,0 +1,5 @@
+#!/usr/bin/env node
+"use strict";
+
+require('please-upgrade-node')(require('../../package.json'));
+require('./')();

lab3/node_modules/json-server/lib/cli/index.js

@@ -0,0 +1,77 @@
+"use strict";
+
+const yargs = require('yargs');
+const run = require('./run');
+const pkg = require('../../package.json');
+module.exports = function () {
+  const argv = yargs.config('config').usage('$0 [options] <source>').options({
+    port: {
+      alias: 'p',
+      description: 'Set port',
+      default: 3000
+    },
+    host: {
+      alias: 'H',
+      description: 'Set host',
+      default: 'localhost'
+    },
+    watch: {
+      alias: 'w',
+      description: 'Watch file(s)'
+    },
+    routes: {
+      alias: 'r',
+      description: 'Path to routes file'
+    },
+    middlewares: {
+      alias: 'm',
+      array: true,
+      description: 'Paths to middleware files'
+    },
+    static: {
+      alias: 's',
+      description: 'Set static files directory'
+    },
+    'read-only': {
+      alias: 'ro',
+      description: 'Allow only GET requests'
+    },
+    'no-cors': {
+      alias: 'nc',
+      description: 'Disable Cross-Origin Resource Sharing'
+    },
+    'no-gzip': {
+      alias: 'ng',
+      description: 'Disable GZIP Content-Encoding'
+    },
+    snapshots: {
+      alias: 'S',
+      description: 'Set snapshots directory',
+      default: '.'
+    },
+    delay: {
+      alias: 'd',
+      description: 'Add delay to responses (ms)'
+    },
+    id: {
+      alias: 'i',
+      description: 'Set database id property (e.g. _id)',
+      default: 'id'
+    },
+    foreignKeySuffix: {
+      alias: 'fks',
+      description: 'Set foreign key suffix (e.g. _id as in post_id)',
+      default: 'Id'
+    },
+    quiet: {
+      alias: 'q',
+      description: 'Suppress log messages from output'
+    },
+    config: {
+      alias: 'c',
+      description: 'Path to config file',
+      default: 'json-server.json'
+    }
+  }).boolean('watch').boolean('read-only').boolean('quiet').boolean('no-cors').boolean('no-gzip').help('help').alias('help', 'h').version(pkg.version).alias('version', 'v').example('$0 db.json', '').example('$0 file.js', '').example('$0 http://example.com/db.json', '').epilog('https://github.com/typicode/json-server').require(1, 'Missing <source> argument').argv;
+  run(argv);
+};

lab3/node_modules/json-server/lib/cli/run.js

@@ -0,0 +1,213 @@
+"use strict";
+
+const fs = require('fs');
+const path = require('path');
+const jph = require('json-parse-helpfulerror');
+const _ = require('lodash');
+const chalk = require('chalk');
+const enableDestroy = require('server-destroy');
+const pause = require('connect-pause');
+const is = require('./utils/is');
+const load = require('./utils/load');
+const jsonServer = require('../server');
+function prettyPrint(argv, object, rules) {
+  const root = `http://${argv.host}:${argv.port}`;
+  console.log();
+  console.log(chalk.bold('  Resources'));
+  for (const prop in object) {
+    // skip printing $schema nodes
+    if (prop === '$schema') continue;
+    console.log(`  ${root}/${prop}`);
+  }
+  if (rules) {
+    console.log();
+    console.log(chalk.bold('  Other routes'));
+    for (const rule in rules) {
+      console.log(`  ${rule} -> ${rules[rule]}`);
+    }
+  }
+  console.log();
+  console.log(chalk.bold('  Home'));
+  console.log(`  ${root}`);
+  console.log();
+}
+function createApp(db, routes, middlewares, argv) {
+  const app = jsonServer.create();
+  const {
+    foreignKeySuffix
+  } = argv;
+  const router = jsonServer.router(db, foreignKeySuffix ? {
+    foreignKeySuffix
+  } : undefined);
+  const defaultsOpts = {
+    logger: !argv.quiet,
+    readOnly: argv.readOnly,
+    noCors: argv.noCors,
+    noGzip: argv.noGzip,
+    bodyParser: true
+  };
+  if (argv.static) {
+    defaultsOpts.static = path.join(process.cwd(), argv.static);
+  }
+  const defaults = jsonServer.defaults(defaultsOpts);
+  app.use(defaults);
+  if (routes) {
+    const rewriter = jsonServer.rewriter(routes);
+    app.use(rewriter);
+  }
+  if (middlewares) {
+    app.use(middlewares);
+  }
+  if (argv.delay) {
+    app.use(pause(argv.delay));
+  }
+  router.db._.id = argv.id;
+  app.db = router.db;
+  app.use(router);
+  return app;
+}
+module.exports = function (argv) {
+  const source = argv._[0];
+  let app;
+  let server;
+  if (!fs.existsSync(argv.snapshots)) {
+    console.log(`Error: snapshots directory ${argv.snapshots} doesn't exist`);
+    process.exit(1);
+  }
+
+  // noop log fn
+  if (argv.quiet) {
+    console.log = () => {};
+  }
+  console.log();
+  console.log(chalk.cyan('  \\{^_^}/ hi!'));
+  function start(cb) {
+    console.log();
+    console.log(chalk.gray('  Loading', source));
+    server = undefined;
+
+    // create db and load object, JSON file, JS or HTTP database
+    return load(source).then(db => {
+      // Load additional routes
+      let routes;
+      if (argv.routes) {
+        console.log(chalk.gray('  Loading', argv.routes));
+        routes = JSON.parse(fs.readFileSync(argv.routes));
+      }
+
+      // Load middlewares
+      let middlewares;
+      if (argv.middlewares) {
+        middlewares = argv.middlewares.map(function (m) {
+          console.log(chalk.gray('  Loading', m));
+          return require(path.resolve(m));
+        });
+      }
+
+      // Done
+      console.log(chalk.gray('  Done'));
+
+      // Create app and server
+      app = createApp(db, routes, middlewares, argv);
+      server = app.listen(argv.port, argv.host);
+
+      // Enhance with a destroy function
+      enableDestroy(server);
+
+      // Display server informations
+      prettyPrint(argv, db.getState(), routes);
+
+      // Catch and handle any error occurring in the server process
+      process.on('uncaughtException', error => {
+        if (error.errno === 'EADDRINUSE') console.log(chalk.red(`Cannot bind to the port ${error.port}. Please specify another port number either through --port argument or through the json-server.json configuration file`));else console.log('Some error occurred', error);
+        process.exit(1);
+      });
+    });
+  }
+
+  // Start server
+  start().then(() => {
+    // Snapshot
+    console.log(chalk.gray('  Type s + enter at any time to create a snapshot of the database'));
+
+    // Support nohup
+    // https://github.com/typicode/json-server/issues/221
+    process.stdin.on('error', () => {
+      console.log(`  Error, can't read from stdin`);
+      console.log(`  Creating a snapshot from the CLI won't be possible`);
+    });
+    process.stdin.setEncoding('utf8');
+    process.stdin.on('data', chunk => {
+      if (chunk.trim().toLowerCase() === 's') {
+        const filename = `db-${Date.now()}.json`;
+        const file = path.join(argv.snapshots, filename);
+        const state = app.db.getState();
+        fs.writeFileSync(file, JSON.stringify(state, null, 2), 'utf-8');
+        console.log(`  Saved snapshot to ${path.relative(process.cwd(), file)}\n`);
+      }
+    });
+
+    // Watch files
+    if (argv.watch) {
+      console.log(chalk.gray('  Watching...'));
+      console.log();
+      const source = argv._[0];
+
+      // Can't watch URL
+      if (is.URL(source)) throw new Error("Can't watch URL");
+
+      // Watch .js or .json file
+      // Since lowdb uses atomic writing, directory is watched instead of file
+      const watchedDir = path.dirname(source);
+      let readError = false;
+      fs.watch(watchedDir, (event, file) => {
+        // https://github.com/typicode/json-server/issues/420
+        // file can be null
+        if (file) {
+          const watchedFile = path.resolve(watchedDir, file);
+          if (watchedFile === path.resolve(source)) {
+            if (is.FILE(watchedFile)) {
+              let obj;
+              try {
+                obj = jph.parse(fs.readFileSync(watchedFile));
+                if (readError) {
+                  console.log(chalk.green(`  Read error has been fixed :)`));
+                  readError = false;
+                }
+              } catch (e) {
+                readError = true;
+                console.log(chalk.red(`  Error reading ${watchedFile}`));
+                console.error(e.message);
+                return;
+              }
+
+              // Compare .json file content with in memory database
+              const isDatabaseDifferent = !_.isEqual(obj, app.db.getState());
+              if (isDatabaseDifferent) {
+                console.log(chalk.gray(`  ${source} has changed, reloading...`));
+                server && server.destroy(() => start());
+              }
+            }
+          }
+        }
+      });
+
+      // Watch routes
+      if (argv.routes) {
+        const watchedDir = path.dirname(argv.routes);
+        fs.watch(watchedDir, (event, file) => {
+          if (file) {
+            const watchedFile = path.resolve(watchedDir, file);
+            if (watchedFile === path.resolve(argv.routes)) {
+              console.log(chalk.gray(`  ${argv.routes} has changed, reloading...`));
+              server && server.destroy(() => start());
+            }
+          }
+        });
+      }
+    }
+  }).catch(err => {
+    console.log(err);
+    process.exit(1);
+  });
+};

lab3/node_modules/json-server/lib/cli/utils/is.js

@@ -0,0 +1,16 @@
+"use strict";
+
+module.exports = {
+  FILE,
+  JS,
+  URL
+};
+function FILE(s) {
+  return !URL(s) && /\.json$/.test(s);
+}
+function JS(s) {
+  return !URL(s) && /\.c?js$/.test(s);
+}
+function URL(s) {
+  return /^(http|https):/.test(s);
+}

lab3/node_modules/json-server/lib/cli/utils/load.js

@@ -0,0 +1,69 @@
+"use strict";
+
+const fs = require('fs');
+const path = require('path');
+const http = require('http');
+const https = require('https');
+const low = require('lowdb');
+const FileAsync = require('lowdb/adapters/FileAsync');
+const Memory = require('lowdb/adapters/Memory');
+const is = require('./is');
+const chalk = require('chalk');
+const example = {
+  posts: [{
+    id: 1,
+    title: 'json-server',
+    author: 'typicode'
+  }],
+  comments: [{
+    id: 1,
+    body: 'some comment',
+    postId: 1
+  }],
+  profile: {
+    name: 'typicode'
+  }
+};
+module.exports = function (source) {
+  return new Promise((resolve, reject) => {
+    if (is.FILE(source)) {
+      if (!fs.existsSync(source)) {
+        console.log(chalk.yellow(`  Oops, ${source} doesn't seem to exist`));
+        console.log(chalk.yellow(`  Creating ${source} with some default data`));
+        console.log();
+        fs.writeFileSync(source, JSON.stringify(example, null, 2));
+      }
+      resolve(low(new FileAsync(source)));
+    } else if (is.URL(source)) {
+      // Normalize the source into a URL object.
+      const sourceUrl = new URL(source);
+      // Pick the client based on the protocol scheme
+      const client = sourceUrl.protocol === 'https:' ? https : http;
+      client.get(sourceUrl, res => {
+        let dbData = '';
+        res.on('data', data => {
+          dbData += data;
+        });
+        res.on('end', () => {
+          resolve(low(new Memory()).setState(JSON.parse(dbData)));
+        });
+      }).on('error', error => {
+        return reject(error);
+      });
+    } else if (is.JS(source)) {
+      // Clear cache
+      const filename = path.resolve(source);
+      delete require.cache[filename];
+      const dataFn = require(filename);
+      if (typeof dataFn !== 'function') {
+        throw new Error('The database is a JavaScript file but the export is not a function.');
+      }
+
+      // Run dataFn to generate data
+      const data = dataFn();
+      resolve(low(new Memory()).setState(data));
+    } else {
+      throw new Error(`Unsupported source ${source}`);
+    }
+  });
+};

lab3/node_modules/json-server/lib/server/body-parser.js

@@ -0,0 +1,9 @@
+"use strict";
+
+const bodyParser = require('body-parser');
+module.exports = [bodyParser.json({
+  limit: '10mb',
+  extended: false
+}), bodyParser.urlencoded({
+  extended: false
+})];

lab3/node_modules/json-server/lib/server/defaults.js

@@ -0,0 +1,73 @@
+"use strict";
+
+const fs = require('fs');
+const path = require('path');
+const express = require('express');
+const logger = require('morgan');
+const cors = require('cors');
+const compression = require('compression');
+const errorhandler = require('errorhandler');
+const bodyParser = require('./body-parser');
+module.exports = function (opts) {
+  const userDir = path.join(process.cwd(), 'public');
+  const defaultDir = path.join(__dirname, '../../public');
+  const staticDir = fs.existsSync(userDir) ? userDir : defaultDir;
+  opts = Object.assign({
+    logger: true,
+    static: staticDir
+  }, opts);
+  const arr = [];
+
+  // Compress all requests
+  if (!opts.noGzip) {
+    arr.push(compression());
+  }
+
+  // Enable CORS for all the requests, including static files
+  if (!opts.noCors) {
+    arr.push(cors({
+      origin: true,
+      credentials: true
+    }));
+  }
+  if (process.env.NODE_ENV === 'development') {
+    // only use in development
+    arr.push(errorhandler());
+  }
+
+  // Serve static files
+  arr.push(express.static(opts.static));
+
+  // Logger
+  if (opts.logger) {
+    arr.push(logger('dev', {
+      skip: req => process.env.NODE_ENV === 'test' || req.path === '/favicon.ico'
+    }));
+  }
+
+  // No cache for IE
+  // https://support.microsoft.com/en-us/kb/234067
+  arr.push((req, res, next) => {
+    res.header('Cache-Control', 'no-cache');
+    res.header('Pragma', 'no-cache');
+    res.header('Expires', '-1');
+    next();
+  });
+
+  // Read-only
+  if (opts.readOnly) {
+    arr.push((req, res, next) => {
+      if (req.method === 'GET') {
+        next(); // Continue
+      } else {
+        res.sendStatus(403); // Forbidden
+      }
+    });
+  }
+
+  // Add middlewares
+  if (opts.bodyParser) {
+    arr.push(bodyParser);
+  }
+  return arr;
+};

lab3/node_modules/json-server/lib/server/index.js

@@ -0,0 +1,10 @@
+"use strict";
+
+const express = require('express');
+module.exports = {
+  create: () => express().set('json spaces', 2),
+  defaults: require('./defaults'),
+  router: require('./router'),
+  rewriter: require('./rewriter'),
+  bodyParser: require('./body-parser')
+};

lab3/node_modules/json-server/lib/server/mixins.js

@@ -0,0 +1,76 @@
+"use strict";
+
+const {
+  nanoid
+} = require('nanoid');
+const pluralize = require('pluralize');
+module.exports = {
+  getRemovable,
+  createId,
+  deepQuery
+};
+
+// Returns document ids that have unsatisfied relations
+// Example: a comment that references a post that doesn't exist
+function getRemovable(db, opts) {
+  const _ = this;
+  const removable = [];
+  _.each(db, (coll, collName) => {
+    _.each(coll, doc => {
+      _.each(doc, (value, key) => {
+        if (new RegExp(`${opts.foreignKeySuffix}$`).test(key)) {
+          // Remove foreign key suffix and pluralize it
+          // Example postId -> posts
+          const refName = pluralize.plural(key.replace(new RegExp(`${opts.foreignKeySuffix}$`), ''));
+          // Test if table exists
+          if (db[refName]) {
+            // Test if references is defined in table
+            const ref = _.getById(db[refName], value);
+            if (_.isUndefined(ref)) {
+              removable.push({
+                name: collName,
+                id: doc.id
+              });
+            }
+          }
+        }
+      });
+    });
+  });
+  return removable;
+}
+
+// Return incremented id or uuid
+// Used to override lodash-id's createId with utils.createId
+function createId(coll) {
+  const _ = this;
+  const idProperty = _.__id();
+  if (_.isEmpty(coll)) {
+    return 1;
+  } else {
+    let id = _(coll).maxBy(idProperty)[idProperty];
+
+    // Increment integer id or generate string id
+    return _.isFinite(id) ? ++id : nanoid(7);
+  }
+}
+function deepQuery(value, q) {
+  const _ = this;
+  if (value && q) {
+    if (_.isArray(value)) {
+      for (let i = 0; i < value.length; i++) {
+        if (_.deepQuery(value[i], q)) {
+          return true;
+        }
+      }
+    } else if (_.isObject(value) && !_.isArray(value)) {
+      for (const k in value) {
+        if (_.deepQuery(value[k], q)) {
+          return true;
+        }
+      }
+    } else if (value.toString().toLowerCase().indexOf(q) !== -1) {
+      return true;
+    }
+  }
+}

lab3/node_modules/json-server/lib/server/rewriter.js

@@ -0,0 +1,14 @@
+"use strict";
+
+const express = require('express');
+const rewrite = require('express-urlrewrite');
+module.exports = routes => {
+  const router = express.Router();
+  router.get('/__rules', (req, res) => {
+    res.json(routes);
+  });
+  Object.keys(routes).forEach(key => {
+    router.use(rewrite(key, routes[key]));
+  });
+  return router;
+};

lab3/node_modules/json-server/lib/server/router/delay.js

@@ -0,0 +1,10 @@
+"use strict";
+
+const pause = require('connect-pause');
+module.exports = function delay(req, res, next) {
+  // NOTE: for some reason unknown to me, if the default is 0, the tests seems to add 2 seconds
+  // NOTE: to each test, a default value of 1 does not seem to be effected by that issue
+  const _delay = !isNaN(parseFloat(req.query._delay)) ? parseFloat(req.query._delay) : 1;
+  delete req.query._delay;
+  pause(_delay)(req, res, next);
+};

lab3/node_modules/json-server/lib/server/router/get-full-url.js

@@ -0,0 +1,10 @@
+"use strict";
+
+const url = require('url');
+module.exports = function getFullURL(req) {
+  const root = url.format({
+    protocol: req.protocol,
+    host: req.get('host')
+  });
+  return `${root}${req.originalUrl}`;
+};

lab3/node_modules/json-server/lib/server/router/index.js

@@ -0,0 +1,91 @@
+"use strict";
+
+const express = require('express');
+const methodOverride = require('method-override');
+const _ = require('lodash');
+const lodashId = require('lodash-id');
+const low = require('lowdb');
+const Memory = require('lowdb/adapters/Memory');
+const FileSync = require('lowdb/adapters/FileSync');
+const bodyParser = require('../body-parser');
+const validateData = require('./validate-data');
+const plural = require('./plural');
+const nested = require('./nested');
+const singular = require('./singular');
+const mixins = require('../mixins');
+module.exports = (db, opts) => {
+  opts = Object.assign({
+    foreignKeySuffix: 'Id',
+    _isFake: false
+  }, opts);
+  if (typeof db === 'string') {
+    db = low(new FileSync(db));
+  } else if (!_.has(db, '__chain__') || !_.has(db, '__wrapped__')) {
+    db = low(new Memory()).setState(db);
+  }
+
+  // Create router
+  const router = express.Router();
+
+  // Add middlewares
+  router.use(methodOverride());
+  router.use(bodyParser);
+  validateData(db.getState());
+
+  // Add lodash-id methods to db
+  db._.mixin(lodashId);
+
+  // Add specific mixins
+  db._.mixin(mixins);
+
+  // Expose database
+  router.db = db;
+
+  // Expose render
+  router.render = (req, res) => {
+    res.jsonp(res.locals.data);
+  };
+
+  // GET /db
+  router.get('/db', (req, res) => {
+    res.jsonp(db.getState());
+  });
+
+  // Handle /:parent/:parentId/:resource
+  router.use(nested(opts));
+
+  // Create routes
+  db.forEach((value, key) => {
+    if (key === '$schema') {
+      // ignore $schema
+      return;
+    }
+    if (_.isPlainObject(value)) {
+      router.use(`/${key}`, singular(db, key, opts));
+      return;
+    }
+    if (_.isArray(value)) {
+      router.use(`/${key}`, plural(db, key, opts));
+      return;
+    }
+    const sourceMessage = '';
+    // if (!_.isObject(source)) {
+    //   sourceMessage = `in ${source}`
+    // }
+
+    const msg = `Type of "${key}" (${typeof value}) ${sourceMessage} is not supported. ` + `Use objects or arrays of objects.`;
+    throw new Error(msg);
+  }).value();
+  router.use((req, res) => {
+    if (!res.locals.data) {
+      res.status(404);
+      res.locals.data = {};
+    }
+    router.render(req, res);
+  });
+  router.use((err, req, res, next) => {
+    console.error(err.stack);
+    res.status(500).send(err.stack);
+  });
+  return router;
+};

lab3/node_modules/json-server/lib/server/router/nested.js

@@ -0,0 +1,26 @@
+"use strict";
+
+const express = require('express');
+const pluralize = require('pluralize');
+const delay = require('./delay');
+module.exports = opts => {
+  const router = express.Router();
+  router.use(delay);
+
+  // Rewrite URL (/:resource/:id/:nested -> /:nested) and request query
+  function get(req, res, next) {
+    const prop = pluralize.singular(req.params.resource);
+    req.query[`${prop}${opts.foreignKeySuffix}`] = req.params.id;
+    req.url = `/${req.params.nested}`;
+    next();
+  }
+
+  // Rewrite URL (/:resource/:id/:nested -> /:nested) and request body
+  function post(req, res, next) {
+    const prop = pluralize.singular(req.params.resource);
+    req.body[`${prop}${opts.foreignKeySuffix}`] = req.params.id;
+    req.url = `/${req.params.nested}`;
+    next();
+  }
+  return router.get('/:resource/:id/:nested', get).post('/:resource/:id/:nested', post);
+};

lab3/node_modules/json-server/lib/server/router/plural.js

@@ -0,0 +1,273 @@
+"use strict";
+
+function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
+function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { _defineProperty(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; }
+function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
+function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
+const express = require('express');
+const _ = require('lodash');
+const pluralize = require('pluralize');
+const write = require('./write');
+const getFullURL = require('./get-full-url');
+const utils = require('../utils');
+const delay = require('./delay');
+module.exports = (db, name, opts) => {
+  // Create router
+  const router = express.Router();
+  router.use(delay);
+
+  // Embed function used in GET /name and GET /name/id
+  function embed(resource, e) {
+    e && [].concat(e).forEach(externalResource => {
+      if (db.get(externalResource).value) {
+        const query = {};
+        const singularResource = pluralize.singular(name);
+        query[`${singularResource}${opts.foreignKeySuffix}`] = resource.id;
+        resource[externalResource] = db.get(externalResource).filter(query).value();
+      }
+    });
+  }
+
+  // Expand function used in GET /name and GET /name/id
+  function expand(resource, e) {
+    e && [].concat(e).forEach(innerResource => {
+      const plural = pluralize(innerResource);
+      if (db.get(plural).value()) {
+        const prop = `${innerResource}${opts.foreignKeySuffix}`;
+        resource[innerResource] = db.get(plural).getById(resource[prop]).value();
+      }
+    });
+  }
+
+  // GET /name
+  // GET /name?q=
+  // GET /name?attr=&attr=
+  // GET /name?_end=&
+  // GET /name?_start=&_end=&
+  // GET /name?_embed=&_expand=
+  function list(req, res, next) {
+    // Resource chain
+    let chain = db.get(name);
+
+    // Remove q, _start, _end, ... from req.query to avoid filtering using those
+    // parameters
+    let q = req.query.q;
+    let _start = req.query._start;
+    let _end = req.query._end;
+    let _page = req.query._page;
+    const _sort = req.query._sort;
+    const _order = req.query._order;
+    let _limit = req.query._limit;
+    const _embed = req.query._embed;
+    const _expand = req.query._expand;
+    delete req.query.q;
+    delete req.query._start;
+    delete req.query._end;
+    delete req.query._sort;
+    delete req.query._order;
+    delete req.query._limit;
+    delete req.query._embed;
+    delete req.query._expand;
+
+    // Automatically delete query parameters that can't be found
+    // in the database
+    Object.keys(req.query).forEach(query => {
+      const arr = db.get(name).value();
+      for (const i in arr) {
+        if (_.has(arr[i], query) || query === 'callback' || query === '_' || /_lte$/.test(query) || /_gte$/.test(query) || /_ne$/.test(query) || /_like$/.test(query)) return;
+      }
+      delete req.query[query];
+    });
+    if (q) {
+      // Full-text search
+      if (Array.isArray(q)) {
+        q = q[0];
+      }
+      q = q.toLowerCase();
+      chain = chain.filter(obj => {
+        for (const key in obj) {
+          const value = obj[key];
+          if (db._.deepQuery(value, q)) {
+            return true;
+          }
+        }
+        return false;
+      });
+    }
+    Object.keys(req.query).forEach(key => {
+      // Don't take into account JSONP query parameters
+      // jQuery adds a '_' query parameter too
+      if (key !== 'callback' && key !== '_') {
+        // Always use an array, in case req.query is an array
+        const arr = [].concat(req.query[key]);
+        const isDifferent = /_ne$/.test(key);
+        const isRange = /_lte$/.test(key) || /_gte$/.test(key);
+        const isLike = /_like$/.test(key);
+        const path = key.replace(/(_lte|_gte|_ne|_like)$/, '');
+        chain = chain.filter(element => {
+          return arr.map(function (value) {
+            // get item value based on path
+            // i.e post.title -> 'foo'
+            const elementValue = _.get(element, path);
+
+            // Prevent toString() failing on undefined or null values
+            if (elementValue === undefined || elementValue === null) {
+              return undefined;
+            }
+            if (isRange) {
+              const isLowerThan = /_gte$/.test(key);
+              return isLowerThan ? value <= elementValue : value >= elementValue;
+            } else if (isDifferent) {
+              return value !== elementValue.toString();
+            } else if (isLike) {
+              return new RegExp(value, 'i').test(elementValue.toString());
+            } else {
+              return value === elementValue.toString();
+            }
+          }).reduce((a, b) => isDifferent ? a && b : a || b);
+        });
+      }
+    });
+
+    // Sort
+    if (_sort) {
+      const _sortSet = _sort.split(',');
+      const _orderSet = (_order || '').split(',').map(s => s.toLowerCase());
+      chain = chain.orderBy(_sortSet, _orderSet);
+    }
+
+    // Slice result
+    if (_end || _limit || _page) {
+      res.setHeader('X-Total-Count', chain.size());
+      res.setHeader('Access-Control-Expose-Headers', `X-Total-Count${_page ? ', Link' : ''}`);
+    }
+    if (_page) {
+      _page = parseInt(_page, 10);
+      _page = _page >= 1 ? _page : 1;
+      _limit = parseInt(_limit, 10) || 10;
+      const page = utils.getPage(chain.value(), _page, _limit);
+      const links = {};
+      const fullURL = getFullURL(req);
+      if (page.first) {
+        links.first = fullURL.replace(`page=${page.current}`, `page=${page.first}`);
+      }
+      if (page.prev) {
+        links.prev = fullURL.replace(`page=${page.current}`, `page=${page.prev}`);
+      }
+      if (page.next) {
+        links.next = fullURL.replace(`page=${page.current}`, `page=${page.next}`);
+      }
+      if (page.last) {
+        links.last = fullURL.replace(`page=${page.current}`, `page=${page.last}`);
+      }
+      res.links(links);
+      chain = _.chain(page.items);
+    } else if (_end) {
+      _start = parseInt(_start, 10) || 0;
+      _end = parseInt(_end, 10);
+      chain = chain.slice(_start, _end);
+    } else if (_limit) {
+      _start = parseInt(_start, 10) || 0;
+      _limit = parseInt(_limit, 10);
+      chain = chain.slice(_start, _start + _limit);
+    }
+
+    // embed and expand
+    chain = chain.cloneDeep().forEach(function (element) {
+      embed(element, _embed);
+      expand(element, _expand);
+    });
+    res.locals.data = chain.value();
+    next();
+  }
+
+  // GET /name/:id
+  // GET /name/:id?_embed=&_expand
+  function show(req, res, next) {
+    const _embed = req.query._embed;
+    const _expand = req.query._expand;
+    const resource = db.get(name).getById(req.params.id).value();
+    if (resource) {
+      // Clone resource to avoid making changes to the underlying object
+      const clone = _.cloneDeep(resource);
+
+      // Embed other resources based on resource id
+      // /posts/1?_embed=comments
+      embed(clone, _embed);
+
+      // Expand inner resources based on id
+      // /posts/1?_expand=user
+      expand(clone, _expand);
+      res.locals.data = clone;
+    }
+    next();
+  }
+
+  // POST /name
+  function create(req, res, next) {
+    let resource;
+    if (opts._isFake) {
+      const id = db.get(name).createId().value();
+      resource = _objectSpread(_objectSpread({}, req.body), {}, {
+        id
+      });
+    } else {
+      resource = db.get(name).insert(req.body).value();
+    }
+    res.setHeader('Access-Control-Expose-Headers', 'Location');
+    res.location(`${getFullURL(req)}/${resource.id}`);
+    res.status(201);
+    res.locals.data = resource;
+    next();
+  }
+
+  // PUT /name/:id
+  // PATCH /name/:id
+  function update(req, res, next) {
+    const id = req.params.id;
+    let resource;
+    if (opts._isFake) {
+      resource = db.get(name).getById(id).value();
+      if (req.method === 'PATCH') {
+        resource = _objectSpread(_objectSpread({}, resource), req.body);
+      } else {
+        resource = _objectSpread(_objectSpread({}, req.body), {}, {
+          id: resource.id
+        });
+      }
+    } else {
+      let chain = db.get(name);
+      chain = req.method === 'PATCH' ? chain.updateById(id, req.body) : chain.replaceById(id, req.body);
+      resource = chain.value();
+    }
+    if (resource) {
+      res.locals.data = resource;
+    }
+    next();
+  }
+
+  // DELETE /name/:id
+  function destroy(req, res, next) {
+    let resource;
+    if (opts._isFake) {
+      resource = db.get(name).value();
+    } else {
+      resource = db.get(name).removeById(req.params.id).value();
+
+      // Remove dependents documents
+      const removable = db._.getRemovable(db.getState(), opts);
+      removable.forEach(item => {
+        db.get(item.name).removeById(item.id).value();
+      });
+    }
+    if (resource) {
+      res.locals.data = {};
+    }
+    next();
+  }
+  const w = write(db);
+  router.route('/').get(list).post(create, w);
+  router.route('/:id').get(show).put(update, w).patch(update, w).delete(destroy, w);
+  return router;
+};

lab3/node_modules/json-server/lib/server/router/singular.js

@@ -0,0 +1,52 @@
+"use strict";
+
+function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
+function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { _defineProperty(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; }
+function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
+function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
+const express = require('express');
+const write = require('./write');
+const getFullURL = require('./get-full-url');
+const delay = require('./delay');
+module.exports = (db, name, opts) => {
+  const router = express.Router();
+  router.use(delay);
+  function show(req, res, next) {
+    res.locals.data = db.get(name).value();
+    next();
+  }
+  function create(req, res, next) {
+    if (opts._isFake) {
+      res.locals.data = req.body;
+    } else {
+      db.set(name, req.body).value();
+      res.locals.data = db.get(name).value();
+    }
+    res.setHeader('Access-Control-Expose-Headers', 'Location');
+    res.location(`${getFullURL(req)}`);
+    res.status(201);
+    next();
+  }
+  function update(req, res, next) {
+    if (opts._isFake) {
+      if (req.method === 'PUT') {
+        res.locals.data = req.body;
+      } else {
+        const resource = db.get(name).value();
+        res.locals.data = _objectSpread(_objectSpread({}, resource), req.body);
+      }
+    } else {
+      if (req.method === 'PUT') {
+        db.set(name, req.body).value();
+      } else {
+        db.get(name).assign(req.body).value();
+      }
+      res.locals.data = db.get(name).value();
+    }
+    next();
+  }
+  const w = write(db);
+  router.route('/').get(show).post(create, w).put(update, w).patch(update, w);
+  return router;
+};

lab3/node_modules/json-server/lib/server/router/validate-data.js

@@ -0,0 +1,17 @@
+"use strict";
+
+const _ = require('lodash');
+function validateKey(key) {
+  if (key.indexOf('/') !== -1) {
+    const msg = [`Oops, found / character in database property '${key}'.`, '', "/ aren't supported, if you want to tweak default routes, see", 'https://github.com/typicode/json-server/#add-custom-routes'].join('\n');
+    throw new Error(msg);
+  }
+}
+module.exports = obj => {
+  if (_.isPlainObject(obj)) {
+    Object.keys(obj).forEach(validateKey);
+  } else {
+    throw new Error(`Data must be an object. Found ${Array.isArray(obj) ? 'array' : typeof obj}.
+      'See https://github.com/typicode/json-server for example.`);
+  }
+};

lab3/node_modules/json-server/lib/server/router/write.js

@@ -0,0 +1,8 @@
+"use strict";
+
+module.exports = function write(db) {
+  return (req, res, next) => {
+    db.write();
+    next();
+  };
+};

lab3/node_modules/json-server/lib/server/utils.js

@@ -0,0 +1,26 @@
+"use strict";
+
+module.exports = {
+  getPage
+};
+function getPage(array, page, perPage) {
+  const obj = {};
+  const start = (page - 1) * perPage;
+  const end = page * perPage;
+  obj.items = array.slice(start, end);
+  if (obj.items.length === 0) {
+    return obj;
+  }
+  if (page > 1) {
+    obj.prev = page - 1;
+  }
+  if (end < array.length) {
+    obj.next = page + 1;
+  }
+  if (obj.items.length !== array.length) {
+    obj.current = page;
+    obj.first = 1;
+    obj.last = Math.ceil(array.length / perPage);
+  }
+  return obj;
+}