Update:Remove node-cron dependency

server/libs/nodeCron/index.js

@@ -0,0 +1,64 @@
+'use strict';
+
+const ScheduledTask = require('./scheduled-task');
+const BackgroundScheduledTask = require('./background-scheduled-task');
+const validation = require('./pattern-validation');
+const storage = require('./storage');
+
+/**
+ * @typedef {Object} CronScheduleOptions
+ * @prop {boolean} [scheduled] if a scheduled task is ready and running to be
+ *  performed when the time matches the cron expression.
+ * @prop {string} [timezone] the timezone to execute the task in.
+ */
+
+/**
+ * Creates a new task to execute the given function when the cron
+ *  expression ticks.
+ *
+ * @param {string} expression The cron expression.
+ * @param {Function} func The task to be executed.
+ * @param {CronScheduleOptions} [options] A set of options for the scheduled task.
+ * @returns {ScheduledTask} The scheduled task.
+ */
+function schedule(expression, func, options) {
+    const task = createTask(expression, func, options);
+
+    storage.save(task);
+
+    return task;
+}
+
+function createTask(expression, func, options) {
+    if (typeof func === 'string')
+        return new BackgroundScheduledTask(expression, func, options);
+
+    return new ScheduledTask(expression, func, options);
+}
+
+/**
+ * Check if a cron expression is valid.
+ *
+ * @param {string} expression The cron expression.
+ * @returns {boolean} Whether the expression is valid or not.
+ */
+function validate(expression) {
+    try {
+        validation(expression);
+
+        return true;
+    } catch (_) {
+        return false;
+    }
+}
+
+/**
+ * Gets the scheduled tasks.
+ *
+ * @returns {ScheduledTask[]} The scheduled tasks.
+ */
+function getTasks() {
+    return storage.getTasks();
+}
+
+module.exports = { schedule, validate, getTasks };