implemented creation of boards, their listing, admin login and initialization of the database

node_modules/memorystore/lib/memorystore.js

@@ -0,0 +1,295 @@
+/*!
+ * memorystore
+ * Copyright(c) 2020 Rocco Musolino <@roccomuso>
+ * MIT Licensed
+ */
+
+var debug = require('debug')('memorystore')
+var LRU = require('lru-cache')
+var util = require('util')
+
+/**
+ * One day in milliseconds.
+ */
+
+var oneDay = 86400000
+
+function getTTL (options, sess, sid) {
+  if (typeof options.ttl === 'number') return options.ttl
+  if (typeof options.ttl === 'function') return options.ttl(options, sess, sid)
+  if (options.ttl) throw new TypeError('`options.ttl` must be a number or function.')
+
+  var maxAge = (sess && sess.cookie) ? sess.cookie.maxAge : null
+  return (typeof maxAge === 'number'
+    ? Math.floor(maxAge)
+    : oneDay)
+}
+
+function prune (store) {
+  debug('Pruning expired entries')
+  store.forEach(function (value, key) {
+    store.get(key)
+  })
+}
+
+var defer = typeof setImmediate === 'function'
+  ? setImmediate
+  : function (fn) { process.nextTick(fn.bind.apply(fn, arguments)) }
+
+/**
+ * Return the `MemoryStore` extending `express`'s session Store.
+ *
+ * @param {object} express session
+ * @return {Function}
+ * @api public
+ */
+
+module.exports = function (session) {
+  /**
+   * Express's session Store.
+   */
+
+  var Store = session.Store
+
+  /**
+   * Initialize MemoryStore with the given `options`.
+   *
+   * @param {Object} options
+   * @api public
+   */
+
+  function MemoryStore (options) {
+    if (!(this instanceof MemoryStore)) {
+      throw new TypeError('Cannot call MemoryStore constructor as a function')
+    }
+
+    options = options || {}
+    Store.call(this, options)
+
+    this.options = {}
+    this.options.checkPeriod = options.checkPeriod
+    this.options.max = options.max || Infinity
+    this.options.ttl = options.ttl
+    this.options.dispose = options.dispose
+    this.options.stale = options.stale
+    this.options.noDisposeOnSet = options.noDisposeOnSet
+
+    this.serializer = options.serializer || JSON
+    this.store = LRU(this.options)
+    debug('Init MemoryStore')
+
+    this.startInterval()
+  }
+
+  /**
+   * Inherit from `Store`.
+   */
+
+  util.inherits(MemoryStore, Store)
+
+  /**
+   * Attempt to fetch session by the given `sid`.
+   *
+   * @param {String} sid
+   * @param {Function} fn
+   * @api public
+   */
+
+  MemoryStore.prototype.get = function (sid, fn) {
+    var store = this.store
+
+    debug('GET "%s"', sid)
+
+    var data = store.get(sid)
+    if (!data) return fn()
+
+    debug('GOT %s', data)
+    var err = null
+    var result
+    try {
+      result = this.serializer.parse(data)
+    } catch (er) {
+      err = er
+    }
+
+    fn && defer(fn, err, result)
+  }
+
+  /**
+   * Commit the given `sess` object associated with the given `sid`.
+   *
+   * @param {String} sid
+   * @param {Session} sess
+   * @param {Function} fn
+   * @api public
+   */
+
+  MemoryStore.prototype.set = function (sid, sess, fn) {
+    var store = this.store
+
+    var ttl = getTTL(this.options, sess, sid)
+    try {
+      var jsess = this.serializer.stringify(sess)
+    } catch (err) {
+      fn && defer(fn, err)
+    }
+
+    store.set(sid, jsess, ttl)
+    debug('SET "%s" %s ttl:%s', sid, jsess, ttl)
+    fn && defer(fn, null)
+  }
+
+  /**
+   * Destroy the session associated with the given `sid`.
+   *
+   * @param {String} sid
+   * @api public
+   */
+
+  MemoryStore.prototype.destroy = function (sid, fn) {
+    var store = this.store
+
+    if (Array.isArray(sid)) {
+      sid.forEach(function (s) {
+        debug('DEL "%s"', s)
+        store.del(s)
+      })
+    } else {
+      debug('DEL "%s"', sid)
+      store.del(sid)
+    }
+    fn && defer(fn, null)
+  }
+
+  /**
+   * Refresh the time-to-live for the session with the given `sid`.
+   *
+   * @param {String} sid
+   * @param {Session} sess
+   * @param {Function} fn
+   * @api public
+   */
+
+  MemoryStore.prototype.touch = function (sid, sess, fn) {
+    var store = this.store
+
+    var ttl = getTTL(this.options, sess, sid)
+
+    debug('EXPIRE "%s" ttl:%s', sid, ttl)
+    var err = null
+    if (store.get(sid) !== undefined) {
+      try {
+        var s = this.serializer.parse(store.get(sid))
+        s.cookie = sess.cookie
+        store.set(sid, this.serializer.stringify(s), ttl)
+      } catch (e) {
+        err = e
+      }
+    }
+    fn && defer(fn, err)
+  }
+
+  /**
+   * Fetch all sessions' ids
+   *
+   * @param {Function} fn
+   * @api public
+   */
+
+  MemoryStore.prototype.ids = function (fn) {
+    var store = this.store
+
+    var Ids = store.keys()
+    debug('Getting IDs: %s', Ids)
+    fn && defer(fn, null, Ids)
+  }
+
+  /**
+   * Fetch all sessions
+   *
+   * @param {Function} fn
+   * @api public
+   */
+
+  MemoryStore.prototype.all = function (fn) {
+    var store = this.store
+    var self = this
+
+    debug('Fetching all sessions')
+    var err = null
+    var result = {}
+    try {
+      store.forEach(function (val, key) {
+        result[key] = self.serializer.parse(val)
+      })
+    } catch (e) {
+      err = e
+    }
+    fn && defer(fn, err, result)
+  }
+
+  /**
+   * Delete all sessions from the store
+   *
+   * @param {Function} fn
+   * @api public
+   */
+
+  MemoryStore.prototype.clear = function (fn) {
+    var store = this.store
+    debug('delete all sessions from the store')
+    store.reset()
+    fn && defer(fn, null)
+  }
+
+  /**
+   * Get the count of all sessions in the store
+   *
+   * @param {Function} fn
+   * @api public
+   */
+
+  MemoryStore.prototype.length = function (fn) {
+    var store = this.store
+    debug('getting length', store.itemCount)
+    fn && defer(fn, null, store.itemCount)
+  }
+
+  /**
+   * Start the check interval
+   * @api public
+   */
+
+  MemoryStore.prototype.startInterval = function () {
+    var self = this
+    var ms = this.options.checkPeriod
+    if (ms && typeof ms === 'number') {
+      clearInterval(this._checkInterval)
+      debug('starting periodic check for expired sessions')
+      this._checkInterval = setInterval(function () {
+        prune(self.store) // iterates over the entire cache proactively pruning old entries
+      }, Math.floor(ms)).unref()
+    }
+  }
+
+  /**
+   * Stop the check interval
+   * @api public
+   */
+
+  MemoryStore.prototype.stopInterval = function () {
+    debug('stopping periodic check for expired sessions')
+    clearInterval(this._checkInterval)
+  }
+
+  /**
+   * Remove only expired entries from the store
+   * @api public
+   */
+
+  MemoryStore.prototype.prune = function () {
+    prune(this.store)
+  }
+
+  return MemoryStore
+}