added "!done all" command

configs.js

@@ -213,6 +213,7 @@ const configs = (function () {
 
 	const adminDeleteTasks = "All of {mentioned}'s tasks have been deleted";
 	const taskFinished = 'Good job on finishing the task "{task}", {user}!';
+	const allTasksFinished = "Good job on finishing all your tasks, {user}!";
 	const taskUnfinished =
 		'Task(s) "{task}" has been unmarked as done, {user}!';
 	const taskEdited =
@@ -326,6 +327,7 @@ const configs = (function () {
 		specifyTaskIndex,
 		duplicateTask,
 		taskFinished,
+		allTasksFinished,
 		taskUnfinished,
 		taskEdited,
 		noTaskEdit,

scripts/index.js

@@ -87,6 +87,22 @@ ComfyJS.onCommand = (user, command, message, flags, extra) => {
 			respond(deletedResponse, params);
 		}
 	} else if (commands.finishTaskCommands.includes(command)) {
+		if (message === "all") {
+			let finishAllStatus = markAllTasksAsDone(user);
+
+			if (finishAllStatus === 0) {
+				// user has no tasks
+				respond(responses.noTask, params);
+			} else {
+				// all tasks finished
+				let finishedResponse = responses.allTasksFinished;
+
+				respond(finishedResponse, params);
+			}
+
+			return;
+		}
+
 		let finishStatus = markTaskDone(user, message);
 
 		if (finishStatus === 0) {

scripts/taskList.js

@@ -467,6 +467,26 @@ function markTaskDone(username, task) {
 	}
 }
 
+function markAllTasksAsDone(username) {
+	const tasks = JSON.parse(localStorage.tasks);
+
+	// user does not have any tasks
+	if (!tasks[username] || tasks[username].todos.length === 0) {
+		return 0;
+	}
+
+	for (const task of tasks[username].todos) {
+		task.done = true;
+	}
+
+	localStorage.setItem(`tasks`, JSON.stringify(tasks));
+	if (!scrolling) {
+		renderTaskListToDOM();
+	}
+
+	return 1;
+}
+
 function markTaskUndone(username, task) {
 	const tasks = JSON.parse(localStorage.tasks);