Move further logic into the Command class and add /eval.

server/bot/client.ts

@@ -96,7 +96,15 @@ export class Command {
   }
 
   async execute (context: Context, message: Message, args: string[]) { // eslint-disable-line indent
-    if (!this.requirementsCheck(message)) {
+    // We check for arguments.
+    if (args.length === 0 && this.argsRequired) {
+      message.channel.createMessage(this.invalidUsageMessage)
+      return
+      // Guild and DM only.
+    } else if (this.guildOnly && message.channel.type !== 0) return
+    else if (this.dmOnly && message.channel.type !== 1) return
+    // Check for permissions.
+    else if (!this.requirementsCheck(message)) {
       message.channel.createMessage(
         `**Thankfully, you don't have enough permissions for that, you ${getInsult()}.**`
       )
@@ -137,13 +145,6 @@ export default class CommandParser {
     }
     const args = message.content.split(' ')
     args.shift()
-    // We check for arguments.
-    if (args.length === 0 && command.argsRequired) {
-      message.channel.createMessage(command.invalidUsageMessage)
-      return
-      // Guild and DM only.
-    } else if (command.guildOnly && message.channel.type !== 0) return
-    else if (command.dmOnly && message.channel.type !== 1) return
     // We get the exact content to send.
     const messageToSend = await command.execute(context, message, args)
     // We define a sent variable to keep track.

server/bot/commands/tools.ts

@@ -116,3 +116,30 @@ export const handlePing: Command = {
     sent.edit(`Aha! IveBot ${version} is connected to your server with a ${e}`)
   }
 }
+
+export const handleEval: Command = {
+  name: 'eval',
+  opts: {
+    description: 'Runs JavaScript. Owner only.',
+    fullDescription: 'Runs JavaScript. Owner only.',
+    usage: '/eval <code in codeblock or not>',
+    example: '/eval ```js\nconsole.log(\'ji\')\n```',
+    requirements: { userIDs: [host] }
+  },
+  generator: async (message, args, context) => {
+    try {
+      let toEval = args.join(' ')
+      if (toEval.startsWith('```js')) toEval = toEval.substring(5)
+      if (toEval.endsWith('```')) toEval = toEval.substring(0, toEval.length - 3)
+      // eslint-disable-next-line no-eval
+      const res = eval(toEval.split('```').join(''))
+      message.addReaction('✅')
+      return res || undefined
+    } catch (e) {
+      const channel = await context.client.getDMChannel(host)
+      message.addReaction('❌')
+      channel.createMessage(`**Error:**
+${e}`)
+    }
+  }
+}