initial commit

init/register-commands.ts

@@ -0,0 +1,26 @@
+import {REST, Routes} from 'discord.js';
+
+import {config} from '../config';
+import {logger} from '../logger';
+
+function isArray<T>(data: unknown): data is Array<T>{
+  return (data as Array<T>).length !== undefined;
+}
+
+export async function registerCommands(commands: Array<string>): Promise<number>{
+  const rest = new REST().setToken(config.token);
+  try{
+    const data = await rest.put(
+      Routes.applicationCommands(config.clientId),
+      {body: commands},
+    );
+    if(!isArray(data)) throw Error('Type error');
+    return data.length;
+  }catch(err: unknown){
+    let message;
+    if(err instanceof Error) message = err.message;
+    else message = String(message);
+    logger.error(`While executing "registerCommands", ${message}`);
+    return -1;
+  }
+}