Add option to filter old messages in TextBasedChannel#bulkDelete (#1090)

* add filtering for messages older than two weeks

* Update RESTMethods.js

* Update RESTMethods.js

* Update RESTMethods.js

* Update TextBasedChannel.js

* Update RESTMethods.js

* Update RESTMethods.js

* Update RESTMethods.js

* Update RESTMethods.js

* Update TextBasedChannel.js

src/client/rest/RESTMethods.js

@@ -5,6 +5,7 @@ const splitMessage = require('../../util/SplitMessage');
 const parseEmoji = require('../../util/ParseEmoji');
 const escapeMarkdown = require('../../util/EscapeMarkdown');
 const transformSearchOptions = require('../../util/TransformSearchOptions');
+const Snowflake = require('../../util/Snowflake');
 
 const User = require('../../structures/User');
 const GuildMember = require('../../structures/GuildMember');
@@ -136,7 +137,12 @@ class RESTMethods {
       );
   }
 
-  bulkDeleteMessages(channel, messages) {
+  bulkDeleteMessages(channel, messages, filterOld) {
+    if (filterOld) {
+      messages = messages.filter(id =>
+        Date.now() - Snowflake.deconstruct(id).date.getTime() < 1209600000
+      );
+    }
     return this.rest.makeRequest('post', `${Constants.Endpoints.channelMessages(channel.id)}/bulk_delete`, true, {
       messages,
     }).then(() =>

src/structures/interface/TextBasedChannel.js

@@ -353,16 +353,17 @@ class TextBasedChannel {
   }
 
   /**
-   * Bulk delete given messages.
+   * Bulk delete given messages that are newer than two weeks
    * <warn>This is only available when using a bot account.</warn>
    * @param {Collection<string, Message>|Message[]|number} messages Messages to delete, or number of messages to delete
+   * @param {boolean} [filterOld=false] Filter messages to remove those which are older than two weeks automatically
    * @returns {Promise<Collection<string, Message>>} Deleted messages
    */
-  bulkDelete(messages) {
+  bulkDelete(messages, filterOld = false) {
     if (!isNaN(messages)) return this.fetchMessages({ limit: messages }).then(msgs => this.bulkDelete(msgs));
     if (messages instanceof Array || messages instanceof Collection) {
       const messageIDs = messages instanceof Collection ? messages.keyArray() : messages.map(m => m.id);
-      return this.client.rest.methods.bulkDeleteMessages(this, messageIDs);
+      return this.client.rest.methods.bulkDeleteMessages(this, messageIDs, filterOld);
     }
     throw new TypeError('The messages must be an Array, Collection, or number.');
   }