Basic implementation of play, pause, toggle

lib/command.ts

@@ -0,0 +1,37 @@
+import util from 'util';
+
+const exec = util.promisify(require('child_process').exec);
+
+export async function execCommand(commandToExecute: string): Promise<ExecResult> {
+  if (!Object.values(COMMANDS).includes(commandToExecute)) {
+    throw new Error(`Command ${commandToExecute} is not a valid command.`);
+  }
+  const { stdout, stderr } = await exec(commandToExecute);
+  return {
+    commandOutput: {
+      stdout,
+      stderr,
+    },
+    metaInfo: `Executed command ${commandToExecute}`,
+  };
+}
+
+export const COMMANDS = {
+  LS: 'ls', // For debugging
+  PLAYERCTL_PLAY: 'playerctl play',
+  PLAYERCTL_PAUSE: 'playerctl pause',
+  PLAYERCTL_TOGGLE: 'playerctl play-pause',
+  // Future: next, position, toggle...
+  PACTL_VOL_INC: 'pactl set-sink-volume 2 +5%',
+  PACTL_VOL_DEV: 'pactl set-sink-volume 2 -5%',
+};
+
+type CommandOutput = {
+  stdout?: string;
+  stderr?: string;
+};
+
+export type ExecResult = {
+  commandOutput: CommandOutput;
+  metaInfo: string;
+};

pages/api/control.ts

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+import type { NextApiRequest, NextApiResponse } from 'next';
+import { COMMANDS, execCommand } from '../../lib/command';
+import type { ExecResult } from '../../lib/command';
+
+export default async function handler(
+  req: NextApiRequest,
+  res: NextApiResponse<ExecResult | string>,
+) {
+  try {
+    const execResult = await execCommand(COMMANDS.PLAYERCTL_TOGGLE);
+    res.status(200).json(execResult);
+  } catch (e: unknown) {
+    console.error(e);
+    res.status(500).send((e as Error).toString());
+  }
+}