From bd7e6240abe849c7239f04e8d7edd2dd70ecc00e Mon Sep 17 00:00:00 2001
From: Chanel <z5416986@ad.unsw.edu.au>
Date: Wed, 24 Jul 2024 23:45:11 +1000
Subject: [PATCH] finish APIs for getCurrentActivity and findAllFriends - #842

---
 client/src/api/getFriends.ts     | 89 ++++++++++++++++++++++++++++++++
 client/src/interfaces/Friends.ts | 16 ++++++
 2 files changed, 105 insertions(+)
 create mode 100644 client/src/api/getFriends.ts
 create mode 100644 client/src/interfaces/Friends.ts

diff --git a/client/src/api/getFriends.ts b/client/src/api/getFriends.ts
new file mode 100644
index 000000000..e676a4831
--- /dev/null
+++ b/client/src/api/getFriends.ts
@@ -0,0 +1,89 @@
+import { CurrentActivity, Friend, FriendsList } from '../interfaces/Friends';
+import NetworkError from '../interfaces/NetworkError';
+import { CourseCode, CourseData, EventPeriod } from '../interfaces/Periods';
+import timeoutPromise from '../utils/timeoutPromise';
+import { API_URL } from './config';
+import getCourseInfo from './getCourseInfo';
+
+const getCurrentActivity = async (userId: string): Promise<CurrentActivity | null> => {
+    // get the user's timetable data
+    const baseURL = `${API_URL.server}/user/timetable/${userId}`;
+    try {
+        const data = await timeoutPromise(1000, fetch(baseURL));
+        const json = await data.json();
+        if (data.status === 400) {
+            throw new NetworkError('Internal server error');
+        }
+
+        const selectedCourses = json.selectedCourses;
+
+        // TODO: find helpers for these - for now hardcoded
+        const year = '2024';
+        const term = 'T2';
+        const isConvertToLocalTimezone = true;
+
+        const courseInfos = await Promise.all(
+            selectedCourses.map((courseCode: string) =>
+                getCourseInfo(year, term, courseCode as CourseCode, isConvertToLocalTimezone)
+            )
+        );
+
+        const now = new Date();
+        return findCurrentActivity(courseInfos, json.createdEvents, now);
+    } catch (error) {
+        throw new NetworkError('Could not connect to server');
+    }
+};
+
+
+const findCurrentActivity = (courseInfos: CourseData[], events: EventPeriod[], now: Date): CurrentActivity | null => {
+    for (const courseInfo of courseInfos) {
+        for (const courseClass of Object.values(courseInfo.activities)) {
+            for (const classData of courseClass) {
+                for (const period of classData.periods) {
+                    const classStart = new Date(period.time.start);
+                    const classEnd = new Date(period.time.end);
+
+                    if (classStart <= now && now <= classEnd) {
+                        return { ...courseClass, type: 'class', start: classStart, end: classEnd } as CurrentActivity;
+                    }
+                }
+            }
+        }
+    }
+
+    for (const event of events) {
+        const eventStart = new Date(event.time.start);
+        const eventEnd = new Date(event.time.end);
+
+        if (eventStart <= now && now <= eventEnd) {
+            return { ...event, type: 'event', start: eventStart, end: eventEnd } as CurrentActivity;
+        }
+    }
+
+    return null;
+}
+
+
+const getAllFriends = async (userId: string): Promise<FriendsList> => {
+    const baseURL = `${API_URL.server}/friend/findAllFriends/${userId}`;
+    try {
+        const data = await timeoutPromise(1000, fetch(baseURL));
+        const json = await data.json();
+        if (data.status === 400) {
+            throw new NetworkError('Internal server error');
+        }
+
+        const friends: FriendsList = await Promise.all(json.data.map(async (friend: any) => ({
+            name: friend.name,
+            userId: friend.userId,
+            currentActivity: await getCurrentActivity(friend.userId)
+        })));
+
+       return friends;
+    } catch (error) {
+        throw new NetworkError('Could not connect to server');
+    }
+};
+
+export default getCurrentActivity;
\ No newline at end of file
diff --git a/client/src/interfaces/Friends.ts b/client/src/interfaces/Friends.ts
new file mode 100644
index 000000000..103ea552d
--- /dev/null
+++ b/client/src/interfaces/Friends.ts
@@ -0,0 +1,16 @@
+import { SelectedClasses, CreatedEvents } from "./Periods";
+
+export interface Friend {
+    name: string;
+    userId: string;
+    // show next event within the hour
+    currentActivity: CurrentActivity | null;
+}
+
+export type FriendsList = Friend[];
+
+export type CurrentActivity = {
+    type: 'class' | 'event';
+    start: Date;
+    end: Date;
+}