3 files changed, 500 insertions, 0 deletions
diff --git a/node_modules/discord.js/src/sharding/Shard.js b/node_modules/discord.js/src/sharding/Shard.js
new file mode 100644
index 0000000..ab9b923
--- /dev/null
+++ b/node_modules/discord.js/src/sharding/Shard.js
@@ -0,0 +1,164 @@
+const childProcess = require('child_process');
+const path = require('path');
+const makeError = require('../util/MakeError');
+const makePlainError = require('../util/MakePlainError');
+
+/**
+ * Represents a Shard spawned by the ShardingManager.
+ */
+class Shard {
+  /**
+   * @param {ShardingManager} manager The sharding manager
+   * @param {number} id The ID of this shard
+   * @param {Array} [args=[]] Command line arguments to pass to the script
+   */
+  constructor(manager, id, args = []) {
+    /**
+     * Manager that created the shard
+     * @type {ShardingManager}
+     */
+    this.manager = manager;
+
+    /**
+     * ID of the shard
+     * @type {number}
+     */
+    this.id = id;
+
+    /**
+     * The environment variables for the shard
+     * @type {Object}
+     */
+    this.env = Object.assign({}, process.env, {
+      SHARD_ID: this.id,
+      SHARD_COUNT: this.manager.totalShards,
+      CLIENT_TOKEN: this.manager.token,
+    });
+
+    /**
+     * Process of the shard
+     * @type {ChildProcess}
+     */
+    this.process = childProcess.fork(path.resolve(this.manager.file), args, {
+      env: this.env,
+    });
+    this.process.on('message', this._handleMessage.bind(this));
+    this.process.once('exit', () => {
+      if (this.manager.respawn) this.manager.createShard(this.id);
+    });
+
+    this._evals = new Map();
+    this._fetches = new Map();
+  }
+
+  /**
+   * Sends a message to the shard's process.
+   * @param {*} message Message to send to the shard
+   * @returns {Promise<Shard>}
+   */
+  send(message) {
+    return new Promise((resolve, reject) => {
+      const sent = this.process.send(message, err => {
+        if (err) reject(err); else resolve(this);
+      });
+      if (!sent) throw new Error('Failed to send message to shard\'s process.');
+    });
+  }
+
+  /**
+   * Fetches a Client property value of the shard.
+   * @param {string} prop Name of the Client property to get, using periods for nesting
+   * @returns {Promise<*>}
+   * @example
+   * shard.fetchClientValue('guilds.size').then(count => {
+   *   console.log(`${count} guilds in shard ${shard.id}`);
+   * }).catch(console.error);
+   */
+  fetchClientValue(prop) {
+    if (this._fetches.has(prop)) return this._fetches.get(prop);
+
+    const promise = new Promise((resolve, reject) => {
+      const listener = message => {
+        if (!message || message._fetchProp !== prop) return;
+        this.process.removeListener('message', listener);
+        this._fetches.delete(prop);
+        resolve(message._result);
+      };
+      this.process.on('message', listener);
+
+      this.send({ _fetchProp: prop }).catch(err => {
+        this.process.removeListener('message', listener);
+        this._fetches.delete(prop);
+        reject(err);
+      });
+    });
+
+    this._fetches.set(prop, promise);
+    return promise;
+  }
+
+  /**
+   * Evaluates a script on the shard, in the context of the Client.
+   * @param {string} script JavaScript to run on the shard
+   * @returns {Promise<*>} Result of the script execution
+   */
+  eval(script) {
+    if (this._evals.has(script)) return this._evals.get(script);
+
+    const promise = new Promise((resolve, reject) => {
+      const listener = message => {
+        if (!message || message._eval !== script) return;
+        this.process.removeListener('message', listener);
+        this._evals.delete(script);
+        if (!message._error) resolve(message._result); else reject(makeError(message._error));
+      };
+      this.process.on('message', listener);
+
+      this.send({ _eval: script }).catch(err => {
+        this.process.removeListener('message', listener);
+        this._evals.delete(script);
+        reject(err);
+      });
+    });
+
+    this._evals.set(script, promise);
+    return promise;
+  }
+
+  /**
+   * Handles an IPC message
+   * @param {*} message Message received
+   * @private
+   */
+  _handleMessage(message) {
+    if (message) {
+      // Shard is requesting a property fetch
+      if (message._sFetchProp) {
+        this.manager.fetchClientValues(message._sFetchProp).then(
+          results => this.send({ _sFetchProp: message._sFetchProp, _result: results }),
+          err => this.send({ _sFetchProp: message._sFetchProp, _error: makePlainError(err) })
+        );
+        return;
+      }
+
+      // Shard is requesting an eval broadcast
+      if (message._sEval) {
+        this.manager.broadcastEval(message._sEval).then(
+          results => this.send({ _sEval: message._sEval, _result: results }),
+          err => this.send({ _sEval: message._sEval, _error: makePlainError(err) })
+        );
+        return;
+      }
+    }
+
+    /**
+     * Emitted upon recieving a message from a shard
+     * @event ShardingManager#message
+     * @param {Shard} shard Shard that sent the message
+     * @param {*} message Message that was received
+     */
+    this.manager.emit('message', this, message);
+  }
+}
+
+module.exports = Shard;
diff --git a/node_modules/discord.js/src/sharding/ShardClientUtil.js b/node_modules/discord.js/src/sharding/ShardClientUtil.js
new file mode 100644
index 0000000..6449941
--- /dev/null
+++ b/node_modules/discord.js/src/sharding/ShardClientUtil.js
@@ -0,0 +1,143 @@
+const makeError = require('../util/MakeError');
+const makePlainError = require('../util/MakePlainError');
+
+/**
+ * Helper class for sharded clients spawned as a child process, such as from a ShardingManager
+ */
+class ShardClientUtil {
+  /**
+   * @param {Client} client Client of the current shard
+   */
+  constructor(client) {
+    this.client = client;
+    process.on('message', this._handleMessage.bind(this));
+  }
+
+  /**
+   * ID of this shard
+   * @type {number}
+   * @readonly
+   */
+  get id() {
+    return this.client.options.shardId;
+  }
+
+  /**
+   * Total number of shards
+   * @type {number}
+   * @readonly
+   */
+  get count() {
+    return this.client.options.shardCount;
+  }
+
+  /**
+   * Sends a message to the master process
+   * @param {*} message Message to send
+   * @returns {Promise<void>}
+   */
+  send(message) {
+    return new Promise((resolve, reject) => {
+      const sent = process.send(message, err => {
+        if (err) reject(err); else resolve();
+      });
+      if (!sent) throw new Error('Failed to send message to master process.');
+    });
+  }
+
+  /**
+   * Fetches a Client property value of each shard.
+   * @param {string} prop Name of the Client property to get, using periods for nesting
+   * @returns {Promise<Array>}
+   * @example
+   * client.shard.fetchClientValues('guilds.size').then(results => {
+   *   console.log(`${results.reduce((prev, val) => prev + val, 0)} total guilds`);
+   * }).catch(console.error);
+   */
+  fetchClientValues(prop) {
+    return new Promise((resolve, reject) => {
+      const listener = message => {
+        if (!message || message._sFetchProp !== prop) return;
+        process.removeListener('message', listener);
+        if (!message._error) resolve(message._result); else reject(makeError(message._error));
+      };
+      process.on('message', listener);
+
+      this.send({ _sFetchProp: prop }).catch(err => {
+        process.removeListener('message', listener);
+        reject(err);
+      });
+    });
+  }
+
+  /**
+   * Evaluates a script on all shards, in the context of the Clients.
+   * @param {string} script JavaScript to run on each shard
+   * @returns {Promise<Array>} Results of the script execution
+   */
+  broadcastEval(script) {
+    return new Promise((resolve, reject) => {
+      const listener = message => {
+        if (!message || message._sEval !== script) return;
+        process.removeListener('message', listener);
+        if (!message._error) resolve(message._result); else reject(makeError(message._error));
+      };
+      process.on('message', listener);
+
+      this.send({ _sEval: script }).catch(err => {
+        process.removeListener('message', listener);
+        reject(err);
+      });
+    });
+  }
+
+  /**
+   * Handles an IPC message
+   * @param {*} message Message received
+   * @private
+   */
+  _handleMessage(message) {
+    if (!message) return;
+    if (message._fetchProp) {
+      const props = message._fetchProp.split('.');
+      let value = this.client;
+      for (const prop of props) value = value[prop];
+      this._respond('fetchProp', { _fetchProp: message._fetchProp, _result: value });
+    } else if (message._eval) {
+      try {
+        this._respond('eval', { _eval: message._eval, _result: this.client._eval(message._eval) });
+      } catch (err) {
+        this._respond('eval', { _eval: message._eval, _error: makePlainError(err) });
+      }
+    }
+  }
+
+  /**
+   * Sends a message to the master process, emitting an error from the client upon failure
+   * @param {string} type Type of response to send
+   * @param {*} message Message to send
+   * @private
+   */
+  _respond(type, message) {
+    this.send(message).catch(err => {
+      err.message = `Error when sending ${type} response to master process: ${err.message}`;
+      this.client.emit('error', err);
+    });
+  }
+
+  /**
+   * Creates/gets the singleton of this class
+   * @param {Client} client Client to use
+   * @returns {ShardClientUtil}
+   */
+  static singleton(client) {
+    if (!this._singleton) {
+      this._singleton = new this(client);
+    } else {
+      client.emit('warn', 'Multiple clients created in child process; only the first will handle sharding helpers.');
+    }
+    return this._singleton;
+  }
+}
+
+module.exports = ShardClientUtil;
diff --git a/node_modules/discord.js/src/sharding/ShardingManager.js b/node_modules/discord.js/src/sharding/ShardingManager.js
new file mode 100644
index 0000000..671b5d7
--- /dev/null
+++ b/node_modules/discord.js/src/sharding/ShardingManager.js
@@ -0,0 +1,193 @@
+const path = require('path');
+const fs = require('fs');
+const EventEmitter = require('events').EventEmitter;
+const mergeDefault = require('../util/MergeDefault');
+const Shard = require('./Shard');
+const Collection = require('../util/Collection');
+const fetchRecommendedShards = require('../util/FetchRecommendedShards');
+
+/**
+ * This is a utility class that can be used to help you spawn shards of your Client. Each shard is completely separate
+ * from the other. The Shard Manager takes a path to a file and spawns it under the specified amount of shards safely.
+ * If you do not select an amount of shards, the manager will automatically decide the best amount.
+ * @extends {EventEmitter}
+ */
+class ShardingManager extends EventEmitter {
+  /**
+   * @param {string} file Path to your shard script file
+   * @param {Object} [options] Options for the sharding manager
+   * @param {number|string} [options.totalShards='auto'] Number of shards to spawn, or "auto"
+   * @param {boolean} [options.respawn=true] Whether shards should automatically respawn upon exiting
+   * @param {string[]} [options.shardArgs=[]] Arguments to pass to the shard script when spawning
+   * @param {string} [options.token] Token to use for automatic shard count and passing to shards
+   */
+  constructor(file, options = {}) {
+    super();
+    options = mergeDefault({
+      totalShards: 'auto',
+      respawn: true,
+      shardArgs: [],
+      token: null,
+    }, options);
+
+    /**
+     * Path to the shard script file
+     * @type {string}
+     */
+    this.file = file;
+    if (!file) throw new Error('File must be specified.');
+    if (!path.isAbsolute(file)) this.file = path.resolve(process.cwd(), file);
+    const stats = fs.statSync(this.file);
+    if (!stats.isFile()) throw new Error('File path does not point to a file.');
+
+    /**
+     * Amount of shards that this manager is going to spawn
+     * @type {number|string}
+     */
+    this.totalShards = options.totalShards;
+    if (this.totalShards !== 'auto') {
+      if (typeof this.totalShards !== 'number' || isNaN(this.totalShards)) {
+        throw new TypeError('Amount of shards must be a number.');
+      }
+      if (this.totalShards < 1) throw new RangeError('Amount of shards must be at least 1.');
+      if (this.totalShards !== Math.floor(this.totalShards)) {
+        throw new RangeError('Amount of shards must be an integer.');
+      }
+    }
+
+    /**
+     * Whether shards should automatically respawn upon exiting
+     * @type {boolean}
+     */
+    this.respawn = options.respawn;
+
+    /**
+     * An array of arguments to pass to shards.
+     * @type {string[]}
+     */
+    this.shardArgs = options.shardArgs;
+
+    /**
+     * Token to use for obtaining the automatic shard count, and passing to shards
+     * @type {?string}
+     */
+    this.token = options.token ? options.token.replace(/^Bot\s*/i, '') : null;
+
+    /**
+     * A collection of shards that this manager has spawned
+     * @type {Collection<number, Shard>}
+     */
+    this.shards = new Collection();
+  }
+
+  /**
+   * Spawns a single shard.
+   * @param {number} id The ID of the shard to spawn. **This is usually not necessary.**
+   * @returns {Promise<Shard>}
+   */
+  createShard(id = this.shards.size) {
+    const shard = new Shard(this, id, this.shardArgs);
+    this.shards.set(id, shard);
+    /**
+     * Emitted upon launching a shard
+     * @event ShardingManager#launch
+     * @param {Shard} shard Shard that was launched
+     */
+    this.emit('launch', shard);
+    return Promise.resolve(shard);
+  }
+
+  /**
+   * Spawns multiple shards.
+   * @param {number} [amount=this.totalShards] Number of shards to spawn
+   * @param {number} [delay=5500] How long to wait in between spawning each shard (in milliseconds)
+   * @returns {Promise<Collection<number, Shard>>}
+   */
+  spawn(amount = this.totalShards, delay = 5500) {
+    if (amount === 'auto') {
+      return fetchRecommendedShards(this.token).then(count => {
+        this.totalShards = count;
+        return this._spawn(count, delay);
+      });
+    } else {
+      if (typeof amount !== 'number' || isNaN(amount)) throw new TypeError('Amount of shards must be a number.');
+      if (amount < 1) throw new RangeError('Amount of shards must be at least 1.');
+      if (amount !== Math.floor(amount)) throw new TypeError('Amount of shards must be an integer.');
+      return this._spawn(amount, delay);
+    }
+  }
+
+  /**
+   * Actually spawns shards, unlike that poser above >:(
+   * @param {number} amount Number of shards to spawn
+   * @param {number} delay How long to wait in between spawning each shard (in milliseconds)
+   * @returns {Promise<Collection<number, Shard>>}
+   * @private
+   */
+  _spawn(amount, delay) {
+    return new Promise(resolve => {
+      if (this.shards.size >= amount) throw new Error(`Already spawned ${this.shards.size} shards.`);
+      this.totalShards = amount;
+
+      this.createShard();
+      if (this.shards.size >= this.totalShards) {
+        resolve(this.shards);
+        return;
+      }
+
+      if (delay <= 0) {
+        while (this.shards.size < this.totalShards) this.createShard();
+        resolve(this.shards);
+      } else {
+        const interval = setInterval(() => {
+          this.createShard();
+          if (this.shards.size >= this.totalShards) {
+            clearInterval(interval);
+            resolve(this.shards);
+          }
+        }, delay);
+      }
+    });
+  }
+
+  /**
+   * Send a message to all shards.
+   * @param {*} message Message to be sent to the shards
+   * @returns {Promise<Shard[]>}
+   */
+  broadcast(message) {
+    const promises = [];
+    for (const shard of this.shards.values()) promises.push(shard.send(message));
+    return Promise.all(promises);
+  }
+
+  /**
+   * Evaluates a script on all shards, in the context of the Clients.
+   * @param {string} script JavaScript to run on each shard
+   * @returns {Promise<Array>} Results of the script execution
+   */
+  broadcastEval(script) {
+    const promises = [];
+    for (const shard of this.shards.values()) promises.push(shard.eval(script));
+    return Promise.all(promises);
+  }
+
+  /**
+   * Fetches a Client property value of each shard.
+   * @param {string} prop Name of the Client property to get, using periods for nesting
+   * @returns {Promise<Array>}
+   * @example
+   * manager.fetchClientValues('guilds.size').then(results => {
+   *   console.log(`${results.reduce((prev, val) => prev + val, 0)} total guilds`);
+   * }).catch(console.error);
+   */
+  fetchClientValues(prop) {
+    if (this.shards.size === 0) return Promise.reject(new Error('No shards have been spawned.'));
+    if (this.shards.size !== this.totalShards) return Promise.reject(new Error('Still spawning shards.'));
+    const promises = [];
+    for (const shard of this.shards.values()) promises.push(shard.fetchClientValue(prop));
+    return Promise.all(promises);
+  }
+}
+
+module.exports = ShardingManager;