Typescript Bootcamp

Author: jhades

rest-api/src/routes/delete-course.ts

@@ -0,0 +1,51 @@
+import {NextFunction, Request, Response} from "express";
+import {logger} from "../logger";
+import {isInteger} from "../utils";
+import {AppDataSource} from "../data-source";
+import {Lesson} from "../models/lesson";
+import {Course} from "../models/course";
+
+
+export async function deleteCourseAndLessons(
+    request: Request, response: Response, next:NextFunction) {
+
+    try {
+
+        logger.debug(`Called deleteCourseAndLessons()`);
+
+        const courseId = request.params.courseId;
+
+        if (!isInteger(courseId)) {
+            throw `Invalid courseId ${courseId}`;
+        }
+
+        await AppDataSource.manager.transaction(
+            async (transactionalEntityManager) => {
+
+                await transactionalEntityManager
+                    .createQueryBuilder()
+                    .delete()
+                    .from(Lesson)
+                    .where("courseId = :courseId", {courseId})
+                    .execute();
+
+                await transactionalEntityManager
+                    .createQueryBuilder()
+                    .delete()
+                    .from(Course)
+                    .where("id = :courseId",{courseId})
+                    .execute();
+            }
+        );
+
+        response.status(200).json({
+            message: `Course deleted successfully ${courseId}`
+        });
+
+    }
+    catch(error) {
+        logger.error(`Error calling deleteCourseAndLessons()`);
+        return next(error);
+    }
+
+}

rest-api/src/server.ts

@@ -19,6 +19,7 @@ import {findCourseByUrl} from "./routes/find-course-by-url";
 import {findLessonsForCourse} from "./routes/find-lessons-for-course";
 import {updateCourse} from "./routes/update-course";
 import {createCourse} from "./routes/create-course";
+import {deleteCourseAndLessons} from "./routes/delete-course";
 
 const cors = require("cors");
 
@@ -45,6 +46,8 @@ function setupExpress() {
 
     app.route("/api/courses").post(createCourse);
 
+    app.route("/api/courses/:courseId").delete(deleteCourseAndLessons);
+
     app.use(defaultErrorHandler);
 
 }