Add message/channel/guild acknowledging (#1239)

* add acking

* 👀

* Update RESTMethods.js

* Update TextBasedChannel.js

* Update RESTMethods.js

* Update Guild.js

* Update TextBasedChannel.js

* Update Message.js

* super shitty names

* Update GroupDMChannel.js

* Update DMChannel.js

* Update TextChannel.js

src/client/rest/RESTMethods.js

@@ -23,6 +23,7 @@ class RESTMethods {
   constructor(restManager) {
     this.rest = restManager;
     this.client = restManager.client;
+    this._ackToken = null;
   }
 
   login(token = this.client.token) {
@@ -151,6 +152,33 @@ class RESTMethods {
       );
   }
 
+  ackMessage(message) {
+    return this.rest.makeRequest('post',
+      `${Constants.Endpoints.channelMessage(message.channel.id, message.id)}/ack`,
+      true,
+      { token: this._ackToken }
+    ).then(res => {
+      this._ackToken = res.token;
+      return message;
+    });
+  }
+
+  ackTextChannel(channel) {
+    return this.rest.makeRequest('post',
+      `${Constants.Endpoints.channel(channel.id)}/ack`,
+      true,
+      { token: this._ackToken }
+    ).then(res => {
+      this._ackToken = res.token;
+      return channel;
+    });
+  }
+
+  ackGuild(guild) {
+    return this.rest.makeRequest('post', `${Constants.Endpoints.guild(guild.id)}/ack`, true)
+    .then(() => guild);
+  }
+
   bulkDeleteMessages(channel, messages, filterOld) {
     if (filterOld) {
       messages = messages.filter(id =>