+ } else if (isPlainObject(taskFunctions)) {
+ let firstEntry = true
+ for (const [name, fn] of Object.entries(taskFunctions)) {
+ checkValidTaskFunctionEntry<Data, Response>(name, fn)
+ const boundFn = fn.bind(this)
+ if (firstEntry) {
+ this.taskFunctions.set(DEFAULT_TASK_NAME, boundFn)
+ firstEntry = false
+ }
+ this.taskFunctions.set(name, boundFn)
+ }
+ if (firstEntry) {
+ throw new Error('taskFunctions parameter object is empty')
+ }
+ } else {
+ throw new TypeError(
+ 'taskFunctions parameter is not a function or a plain object'
+ )
+ }
+ }
+
+ /**
+ * Checks if the worker has a task function with the given name.
+ *
+ * @param name - The name of the task function to check.
+ * @returns Whether the worker has a task function with the given name or not.
+ */
+ public hasTaskFunction (name: string): TaskFunctionOperationResult {
+ try {
+ checkTaskFunctionName(name)
+ } catch (error) {
+ return { status: false, error: error as Error }
+ }
+ return { status: this.taskFunctions.has(name) }
+ }
+
+ /**
+ * Adds a task function to the worker.
+ * If a task function with the same name already exists, it is replaced.
+ *
+ * @param name - The name of the task function to add.
+ * @param fn - The task function to add.
+ * @returns Whether the task function was added or not.
+ */
+ public addTaskFunction (
+ name: string,
+ fn: TaskFunction<Data, Response>
+ ): TaskFunctionOperationResult {
+ try {
+ checkTaskFunctionName(name)
+ if (name === DEFAULT_TASK_NAME) {
+ throw new Error(
+ 'Cannot add a task function with the default reserved name'
+ )
+ }
+ if (typeof fn !== 'function') {
+ throw new TypeError('fn parameter is not a function')
+ }
+ const boundFn = fn.bind(this)
+ if (
+ this.taskFunctions.get(name) ===
+ this.taskFunctions.get(DEFAULT_TASK_NAME)
+ ) {
+ this.taskFunctions.set(DEFAULT_TASK_NAME, boundFn)
+ }
+ this.taskFunctions.set(name, boundFn)
+ this.sendTaskFunctionNamesToMainWorker()
+ return { status: true }
+ } catch (error) {
+ return { status: false, error: error as Error }