Added reverse

commands/reverse.js

@@ -0,0 +1,21 @@
+const gm = require("gm").subClass({
+  imageMagick: true
+});
+const gmToBuffer = require("../utils/gmbuffer.js");
+
+exports.run = async (message) => {
+  message.channel.sendTyping();
+  const image = await require("../utils/imagedetect.js")(message);
+  if (image === undefined) return `${message.author.mention}, you need to provide a GIF to reverse!`;
+  if (image.type !== "gif" && image.type !== "mp4") return `${message.author.mention}, that isn't a GIF!`;
+  const data = gm(image.path).coalesce().out("-reverse");
+  const buffer = await gmToBuffer(data, image.outputType);
+  return message.channel.createMessage("", {
+    file: buffer,
+    name: "reverse.gif"
+  });
+};
+
+exports.aliases = ["backwards"];
+exports.category = 5;
+exports.help = "Reverses a GIF";