Create MessageAttachment class

src/structures/MessageAttachment.js

@@ -0,0 +1,56 @@
+/**
+ * Represents an Attachment in a Message
+ */
+class MessageAttachment {
+  constructor(message, data) {
+    /**
+     * The Client that instantiated this Message.
+     */
+    this.client = message.client;
+    /**
+     * The message this attachment is part of.
+     */
+    this.message = message;
+    this.setup(data);
+  }
+
+  setup(data) {
+    /**
+     * The ID of this attachment
+     * @type {String}
+     */
+    this.id = data.id;
+    /**
+     * The file name of this attachment
+     * @type {String}
+     */
+    this.filename = data.filename;
+    /**
+     * The size of this attachment in bytes
+     * @type {Number}
+     */
+    this.filesize = data.size;
+    /**
+     * The URL to this attachment
+     * @type {String}
+     */
+    this.url = data.url;
+    /**
+     * The Proxy URL to this attachment
+     * @type {String}
+     */
+    this.proxyURL = data.url;
+    /**
+     * The height of this attachment (if an image)
+     * @type {?Number}
+     */
+    this.height = data.height;
+    /**
+     * The width of this attachment (if an image)
+     * @type {?Number}
+     */
+    this.width = data.width;
+  }
+}
+
+module.exports = MessageAttachment;