Add ability to react to last image

commands/facemorph.js

@@ -235,7 +235,37 @@ const onDirectMention = (msg, content, actionsDone) => {
     return true;
 };
 
+function processLastImage(msg, processor) {
+    let lastImagedMessage = msg.channel.messages.filter(m => !m.author.bot && m.attachments.find(v => util.isValidImage(v.filename) !== undefined)).last();
+
+    if(!lastImagedMessage) {
+        msg.channel.send(`${msg.author.toString()} Sorry, I couldn't find any recent messages with images.`);
+        return;
+    }
+
+    let image = lastImagedMessage.attachments.find(v => util.isValidImage(v.filename));
+    
+    processFaceSwap(
+        msg,
+        image.url,
+        processor,
+        `${msg.author.toString()} Nice image! I don't see anything interesting, though.`,
+        `${msg.author.toString()} ${client.emojis.get("505076258753740810").toString()}`
+    ).catch(err => console.log(`Failed to run faceapp because ${err}`));
+}
+
+const commands = [
+{
+    pattern: "caption last image",
+    action: msg => processLastImage(msg, captionFace)
+},
+{
+    pattern: "look at last image",
+    action: msg => processLastImage(msg, morphFaces)
+}];
+
 module.exports = {
     onMessage: onMessage,
-    onDirectMention: onDirectMention
+    onDirectMention: onDirectMention,
+    commands: commands
 };