let transport of Discord work properly

.gitignore

@@ -44,3 +44,6 @@ jspm_packages
 # config
 config.js
 badwords.js
+
+# other
+package-lock.json

config.example.js

@@ -91,6 +91,7 @@ module.exports = {
             [
                 'irc/#test',
                 'telegram/-12345678',       // Telegram 群組號碼：可以先把 bot 拉到群組中，然後透過 /thisgroupid 來取得 id
+                'Discord/1234567898765432123',
                 'qq/12345678'
                 // 'QQ/87654321'            // 如果有這種需求，亦可以連接
             ]

lib/handlers/DiscordMessageHandler.js

@@ -46,10 +46,10 @@ class DiscordMessageHandler extends MessageHandler {
                         client: 'Discord',
                         type: 'photo',
                         id: p.id,
-                        size: p.filesize,
+                        size: p.size,
                         url: this._useProxyURL ? p.proxyURL : p.url,
                     }];
-                    text += ` <photo: ${p.width}x${p.height}, ${getFriendlySize(p.filesize)}>`;
+                    text += ` <photo: ${p.width}x${p.height}, ${getFriendlySize(p.size)}>`;
                 }
             }
 
@@ -100,7 +100,10 @@ class DiscordMessageHandler extends MessageHandler {
         } else if (this._keepSilence.indexOf(target) !== -1) {
             return Promise.resolve();
         } else {
-            this._client.channels.get(target).send(message);
+            this._client.channels.fetch(target)
+            .then(target_channel => {
+                (async () => await target_channel.send(message))()
+            });
             return Promise.resolve();
         }
     }

main.js

@@ -265,7 +265,7 @@ if (config.Discord && !config.Discord.disabled) {
         useProxyURL: options.useProxyURL,
     };
 
-    const discordHandler = new DiscordMessageHandler(discordClient);
+    const discordHandler = new DiscordMessageHandler(discordClient, options2);
     pluginManager.handlers.set('Discord', discordHandler);
     pluginManager.handlerClasses.set('Discord', {
         object: DiscordMessageHandler,