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utils/academyNotification.js

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+const NotificationModel = require("../models/NotificationModel");
+
+const PURCHASE_TITLE = "پکیج شما خریداری شد";
+const PURCHASE_DESCRIPTION = "یک کاربر پکیج آموزشی شما را خریداری کرد";
+
+const createCoursePurchaseNotification = async ({
+  ownerId,
+  buyerId,
+  courseId,
+}) => {
+  try {
+    if (!ownerId || !buyerId || !courseId) return;
+    if (String(ownerId) === String(buyerId)) return;
+
+    await NotificationModel.create({
+      user_id: ownerId,
+      project_post_id: courseId,
+      type: "academy_purchase",
+      title: PURCHASE_TITLE,
+      description: PURCHASE_DESCRIPTION,
+    });
+  } catch (error) {
+    console.error("Error creating course purchase notification:", error);
+  }
+};
+
+module.exports = {
+  createCoursePurchaseNotification,
+};