Add TextBasedChannel.setTyping(bool)

src/client/rest/RESTMethods.js

@@ -376,6 +376,14 @@ class RESTMethods {
     });
   }
 
+  sendTyping(channelID) {
+    return new Promise((resolve, reject) => {
+      this.rest.makeRequest('post', `${Constants.Endpoints.channel(channelID)}/typing`, true)
+        .then(resolve)
+        .catch(reject);
+    });
+  }
+
   updateGuildRole(role, _data) {
     return new Promise((resolve, reject) => {
       /*

src/structures/ClientUser.js

@@ -17,6 +17,8 @@ class ClientUser extends User {
      * @type {String}
      */
     this.email = data.email;
+
+    this._typing = new Map();
   }
 
   /**

src/structures/DMChannel.js

@@ -58,6 +58,10 @@ class DMChannel extends Channel {
   bulkDelete() {
     return;
   }
+
+  setTyping() {
+    return;
+  }
 }
 
 TextBasedChannel.applyToClass(DMChannel, true);

src/structures/GroupDMChannel.js

@@ -135,6 +135,10 @@ class GroupDMChannel extends Channel {
   bulkDelete() {
     return;
   }
+
+  setTyping() {
+    return;
+  }
 }
 
 TextBasedChannel.applyToClass(GroupDMChannel, true);

src/structures/TextChannel.js

@@ -43,6 +43,10 @@ class TextChannel extends GuildChannel {
   bulkDelete() {
     return;
   }
+
+  setTyping() {
+    return;
+  }
 }
 
 TextBasedChannel.applyToClass(TextChannel, true);

src/structures/interface/TextBasedChannel.js

@@ -98,6 +98,28 @@ class TextBasedChannel {
     });
   }
 
+  /**
+   * Starts or stops a typing indicator in the channel.
+   * <info>It can take a few seconds for the Client User to stop typing.</info>
+   * @param {Boolean} typing whether or not the client user should be typing
+   * @returns {null}
+   * @example
+   * // start typing in a channel
+   * channel.setTyping(true);
+   * @example
+   * // stop typing in a channel
+   * channel.setTyping(false);
+   */
+  setTyping(typing) {
+    clearInterval(this.client.user._typing.get(this.id));
+    if (typing) {
+      this.client.user._typing.set(this.id, setInterval(() => {
+        this.client.rest.methods.sendTyping(this.id);
+      }, 4000));
+      this.client.rest.methods.sendTyping(this.id);
+    }
+  }
+
   _cacheMessage(message) {
     const maxSize = this.client.options.max_message_cache;
     if (maxSize === 0) {
@@ -125,6 +147,7 @@ exports.applyToClass = (structure, full = false) => {
     props.push('_cacheMessage');
     props.push('getMessages');
     props.push('bulkDelete');
+    props.push('setTyping');
   }
   for (const prop of props) {
     applyProp(structure, prop);