Allowing the bot to upload an avatar

bot/bot.js

@@ -1,3 +1,4 @@
+let fs = require('fs');
 let sdk = require('matrix-js-sdk');
 let message = require('./message');
 let utility = require('./utility');
@@ -25,6 +26,7 @@ class Bot {
                 case "PREPARED":
                     this.connected = true;
                     await this.sendStatusStartup();
+                    await this.updateAvatar(process.env.NODE_PATH + '/assets/avatar.jpg');
                     this.client.getJoinedRooms()
                         .done((rooms) => {
                             logger.info("Connected to: %o", rooms)
@@ -94,6 +96,42 @@ class Bot {
         botClient.loginWithToken(this.config.accessToken, connectWithToken);
     }
 
+    updateAvatar(avatarFile, overwrite=false) {
+        let matrixClient = this.client;
+        let botConfig = this.config;
+        let promises = [Promise.resolve(true)];
+        if (this.connected) {
+            promises.push(this.client.getProfileInfo(this.config.userId, "avatar_url")
+                .then((existingAvatarUrl) => {
+                    logger.info("Recieved avatar_url: %o", existingAvatarUrl);
+                    if (typeof existingAvatarUrl !== 'undefined' && typeof existingAvatarUrl == 'object' 
+                        && existingAvatarUrl.constructor === Object && Object.keys(existingAvatarUrl).length !== 0
+                        && !overwrite) {
+                        logger.info("Avatar already set");
+                    } else {
+                        logger.info("Setting avatar content from %s", avatarFile);
+                        let avatarFileBuffer = fs.readFileSync(avatarFile);
+                        logger.debug("Avatar Image Data %o", avatarFileBuffer);
+                        matrixClient.uploadContent(avatarFileBuffer, {
+                            name: botConfig.userId + " avatar",
+                            type: "image/jpeg",
+                            rawResponse: false
+                        }).then((uploadedAvatar) => {
+                                logger.info("Uploaded avatar %o", uploadedAvatar);
+                                matrixClient.setAvatarUrl(uploadedAvatar.content_uri)
+                                    .then(() => {
+                                        logger.info("Updated %s avatar to %s", botConfig.userId, uploadedAvatar.content_uri);
+                                        return true;
+                                    });
+                            });
+                    }
+                }));
+        } else {
+            logger.warn("Attempting to update avatar while disconnected");
+        }
+        return Promise.all(promises);
+    }
+
     sendStatusStartup() {
         let promises = [Promise.resolve(true)]
         if (this.connected) {