implemented pagination for training reports

api/src/services/CourseSerivce.ts

@@ -1,5 +1,6 @@
 import pool from "../db"
 import { Course, CourseAttendee, CourseAttendeeRole, CourseEventDetails, CourseEventSummary, RawAttendeeRow } from "@app/shared/types/course"
+import { PagedData } from "@app/shared/types/pagination";
 import { toDateTime } from "@app/shared/utils/time";
 export async function getAllCourses(): Promise<Course[]> {
     const sql = "SELECT * FROM courses WHERE deleted = false ORDER BY name ASC;"
@@ -107,7 +108,8 @@ export async function insertCourseEvent(event: CourseEventDetails): Promise<numb
     }
 }
 
-export async function getCourseEvents(sortDir: string, search: string = ""): Promise<CourseEventSummary[]> {
+export async function getCourseEvents(sortDir: string, search: string = "", page = 1, pageSize = 10): Promise<PagedData<CourseEventSummary>> {
+    const offset = (page - 1) * pageSize;
 
     let params = [];
     let searchString = "";
@@ -133,11 +135,23 @@ export async function getCourseEvents(sortDir: string, search: string = ""): Pro
                 LEFT JOIN members AS M
                     ON E.created_by = M.id
                 ${searchString}
-                ORDER BY E.event_date ${sortDir};`;
-    console.log(sql)
-    console.log(params)
-    let events: CourseEventSummary[] = await pool.query(sql, params);
-    return events;
+                ORDER BY E.event_date ${sortDir}         
+                LIMIT ? OFFSET ?;`;
+
+    let countSQL = `SELECT COUNT(*) AS count
+                    FROM course_events AS E
+                    LEFT JOIN courses AS C
+                    ON E.course_id = C.id
+                    LEFT JOIN members AS M
+                    ON E.created_by = M.id ${searchString};`
+    let recordCount = Number((await pool.query(countSQL, [...params]))[0].count);
+    let pageCount = recordCount / pageSize;
+
+    let events: CourseEventSummary[] = await pool.query(sql, [...params, pageSize, offset]);
+
+    let output: PagedData<CourseEventSummary> = { data: events, pagination: { page: page, pageSize: pageSize, total: recordCount, totalPages: pageCount } }
+
+    return output;
 }
 
 export async function getCourseEventRoles(): Promise<CourseAttendeeRole[]> {