remove users from message reactions

src/client/rest/RESTMethods.js

@@ -737,12 +737,16 @@ class RESTMethods {
     });
   }
 
-  removeMessageReaction(channelID, messageID, emoji) {
+  removeMessageReaction(channelID, messageID, emoji, userID) {
     return new Promise((resolve, reject) => {
-      this.rest.makeRequest('delete', Constants.Endpoints.selfMessageReaction(channelID, messageID, emoji), true)
+      let endpoint = Constants.Endpoints.selfMessageReaction(channelID, messageID, emoji);
+      if (userID !== this.rest.client.user.id) {
+        endpoint = Constants.Endpoints.userMessageReaction(channelID, messageID, emoji, null, userID);
+      }
+      this.rest.makeRequest('delete', endpoint, true)
         .then(() => {
           resolve(this.rest.client.actions.MessageReactionRemove.handle({
-            user_id: this.rest.client.user.id,
+            user_id: userID,
             message_id: messageID,
             emoji: parseEmoji(emoji),
             channel_id: channelID,

src/structures/MessageReaction.js

@@ -101,12 +101,18 @@ class MessageReaction {
   }
 
   /**
-   * If the client has given this reaction to a message, it is removed.
+   * Removes a user from this reaction.
+   * @param {UserResolvable} [user] the user that you want to remove the reaction, defaults to the client.
    * @returns {Promise<MessageReaction>}
    */
-  remove() {
+  remove(user = this.message.client.user) {
     const message = this.message;
-    return message.client.rest.methods.removeMessageReaction(message.channel.id, message.id, this.emoji.identifier);
+    user = this.message.client.resolver.resolveUserID(user);
+
+    if (!user) return Promise.reject('A UserIDResolvable is required (string, user, member, message, guild)');
+
+    return message.client.rest.methods.removeMessageReaction(
+      message.channel.id, message.id, this.emoji.identifier, user);
   }
 
   /**

src/util/Constants.js

@@ -123,6 +123,8 @@ const Endpoints = exports.Endpoints = {
           `${limit ? `?limit=${limit}` : ''}`,
   selfMessageReaction: (channel, msg, emoji, limit) =>
           `${Endpoints.messageReaction(channel, msg, emoji, limit)}/@me`,
+  userMessageReaction: (channel, msg, emoji, limit, id) =>
+          `${Endpoints.messageReaction(channel, msg, emoji, limit)}/${id}`,
 
   // webhooks
   webhook: (webhookID, token) => `${API}/webhooks/${webhookID}${token ? `/${token}` : ''}`,