add guild emoji methods (#742)

* add guild emoji methods

* run docs

* crawl pointed out some things about the docs, so i fixed

* actually run the docs on the changes 🤦

src/client/rest/RESTMethods.js

@@ -7,6 +7,7 @@ const User = requireStructure('User');
 const GuildMember = requireStructure('GuildMember');
 const Role = requireStructure('Role');
 const Invite = requireStructure('Invite');
+const Emoji = requireStructure('Emoji');
 
 class RESTMethods {
   constructor(restManager) {
@@ -516,6 +517,22 @@ class RESTMethods {
       }).catch(reject);
     });
   }
+
+  createEmoji(guild, image, name) {
+    return new Promise((resolve, reject) => {
+      this.rest.makeRequest('post', `${Constants.Endpoints.guildEmojis(guild.id)}`, true, { name: name, image: image })
+      .then(data => {
+        resolve(new Emoji(guild, data));
+      }).catch(reject);
+    });
+  }
+
+  deleteEmoji(guild, id) {
+    return new Promise((resolve, reject) => {
+      this.rest.makeRequest('delete', `${Constants.Endpoints.guildEmojis(guild.id)}/${id}`, true)
+      .then(resolve).catch(reject);
+    });
+  }
 }
 
 module.exports = RESTMethods;

src/structures/Guild.js

@@ -552,6 +552,43 @@ class Guild {
     return create.then(role => role.edit(data));
   }
 
+  /**
+   * Creates a new custom emoji in the guild.
+   * @param {FileResolveable} attachment The image for the emoji.
+   * @param {string} name The name for the emoji.
+   * @returns {Promise<Emoji>} The created emoji.
+   * @example
+   * // create a new emoji from a url
+   * guild.createEmoji('https://i.imgur.com/w3duR07.png', 'rip')
+   *  .then(emoji => console.log(`Created new emoji with name ${emoji.name}!`))
+   *  .catch(console.log);
+   * @example
+   * // create a new emoji from a file on your computer
+   * guild.createEmoji('./memes/banana.png', 'banana')
+   *  .then(emoji => console.log(`Created new emoji with name ${emoji.name}!`))
+   *  .catch(console.log);
+   */
+  createEmoji(attachment, name) {
+    return new Promise((resolve, reject) => {
+      this.client.resolver.resolveFile(attachment).then(file => {
+        let base64 = new Buffer(file, 'binary').toString('base64');
+        let dataURI = `data:;base64,${base64}`;
+        this.client.rest.methods.createEmoji(this, dataURI, name)
+        .then(resolve).catch(reject);
+      }).catch(reject);
+    });
+  }
+
+  /**
+   * Delete an emoji.
+   * @param {Emoji|string} emoji The emoji to delete.
+   * @returns {Promise}
+   */
+  deleteEmoji(emoji) {
+    if (emoji instanceof Emoji) emoji = emoji.id;
+    return this.client.rest.methods.deleteEmoji(this, emoji);
+  }
+
   /**
    * Causes the Client to leave the guild.
    * @returns {Promise<Guild>}

src/util/Constants.js

@@ -108,6 +108,7 @@ const Endpoints = exports.Endpoints = {
   guildMember: (guildID, memberID) => `${Endpoints.guildMembers(guildID)}/${memberID}`,
   stupidInconsistentGuildEndpoint: (guildID) => `${Endpoints.guildMember(guildID, '@me')}/nick`,
   guildChannels: (guildID) => `${Endpoints.guild(guildID)}/channels`,
+  guildEmojis: (guildID) => `${Endpoints.guild(guildID)}/emojis`,
 
   // channels
   channels: `${API}/channels`,