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feeds.ts
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feeds.ts
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import { Db } from 'mongodb';
import { InternalError } from './errors';
import * as _ from 'lodash';
import * as canvas from './canvas';
import * as portal from './portal';
import * as users from './users';
/**
* Updates a user's Canvas cache data.
* @param db Database connection.
* @param user Username.
*/
export async function updateCanvasCache(db: Db, user: string) {
const canvasdata = db.collection('canvasFeeds');
const { isUser, userDoc } = await users.get(db, user);
if (!isUser) {
throw new Error("User doesn't exist!");
}
const { events } = await canvas.getUserCal(db, userDoc!.user);
try {
await canvasdata.deleteMany({ user: userDoc!._id });
} catch (e) {
throw new InternalError('There was an error removing the old events from the database!', e);
}
if (events === null || events.length === 0) {
return;
}
const creationDate = new Date();
const newEvents = events as canvas.CanvasCacheEvent[];
for (const ev of newEvents) {
ev.user = userDoc!._id;
// Mongo operators don't work for insertMany so set creation time manually
ev.createdAt = creationDate;
}
try {
await canvasdata.insertMany(newEvents);
} catch (e) {
throw new InternalError('There was an error inserting events into the database!', e);
}
}
/**
* Adds a user to the Portal classes cache update queue.
* @param db Database connection.
* @param user Username.
* @returns The events that are *currently* in the Portal classes cache, or null if there's no URL.
*/
export async function addPortalQueueClasses(db: Db, user: string) {
const { isUser, userDoc } = await users.get(db, user);
if (!isUser) {
throw new Error("User doesn't exist!");
}
const portaldata = db.collection<portal.PortalCacheEvent>('portalFeedsClasses');
const userdata = db.collection<users.UserDoc>('users');
const { cal: events } = await portal.getFromCalClasses(db, user);
if (events === null) {
try {
await userdata.updateOne({ user }, { $set: { inPortalQueueClasses: false } });
} catch (e) {
throw new InternalError('There was an error removing the user from the queue!', e);
}
return events;
} else if (_.isEmpty(events)) {
try {
await userdata.updateOne({ user }, { $set: { inPortalQueueClasses: true } });
} catch (e) {
throw new InternalError('There was an error adding the user to the queue!', e);
}
return events;
}
try {
// eslint-disable-next-line @typescript-eslint/ban-ts-comment
// @ts-ignore
await portaldata.deleteMany({ user: userDoc!._id });
} catch (e) {
throw new InternalError('There was an error removing the old events from the database!', e);
}
const newEvents = events as portal.PortalCacheEvent[];
for (const ev of newEvents) {
ev.user = userDoc!._id;
}
try {
await portaldata.insertMany(newEvents);
} catch (e) {
throw new InternalError('There was an error inserting events into the database!', e);
}
try {
await userdata.updateOne({ user }, { $set: { inPortalQueueClasses: false } });
} catch (e) {
throw new InternalError('There was an error removing the user from the queue!', e);
}
return newEvents;
}
/**
* Adds a user to the Portal calendar cache update queue.
* @param db Database connection.
* @param user Username.
* @returns The events that are *currently* in the Portal calendar cache, or null if there's no URL.
*/
export async function addPortalQueueCalendar(db: Db, user: string) {
const { isUser, userDoc } = await users.get(db, user);
if (!isUser) {
throw new Error("User doesn't exist!");
}
const portaldata = db.collection<portal.PortalCacheEvent>('portalFeedsCalendar');
const userdata = db.collection<users.UserDoc>('users');
const { cal: events } = await portal.getFromCalCalendar(db, user);
if (events === null) {
try {
await userdata.updateOne({ user }, { $set: { inPortalQueueCalendar: false } });
} catch (e) {
throw new InternalError('There was an error removing the user from the queue!', e);
}
return events;
} else if (_.isEmpty(events)) {
try {
await userdata.updateOne({ user }, { $set: { inPortalQueueCalendar: true } });
} catch (e) {
throw new InternalError('There was an error adding the user to the queue!', e);
}
return events;
}
try {
// eslint-disable-next-line @typescript-eslint/ban-ts-comment
// @ts-ignore
await portaldata.deleteMany({ user: userDoc!._id });
} catch (e) {
throw new InternalError('There was an error removing the old events from the database!', e);
}
const newEvents = events as portal.PortalCacheEvent[];
for (const ev of newEvents) {
ev.user = userDoc!._id;
}
try {
await portaldata.insertMany(newEvents);
} catch (e) {
throw new InternalError('There was an error inserting events into the database!', e);
}
try {
await userdata.updateOne({ user }, { $set: { inPortalQueueCalendar: false } });
} catch (e) {
throw new InternalError('There was an error removing the user from the queue!', e);
}
return newEvents;
}
/**
* Processes the queue for updating cached Portal data.
* @param db Database connection.
*/
export async function processPortalQueue(db: Db) {
const userdata = db.collection<users.UserDoc>('users');
let queue: users.UserDoc[];
try {
queue = await userdata
.find({ $or: [{ inPortalQueueClasses: true }, { inPortalQueueCalendar: true }] })
.toArray();
} catch (e) {
throw new InternalError('There was a problem querying the database!', e);
}
for (const queueObj of queue) {
if (queueObj.inPortalQueueClasses) {
await addPortalQueueClasses(db, queueObj.user);
}
if (queueObj.inPortalQueueCalendar) {
await addPortalQueueCalendar(db, queueObj.user);
}
}
}
/**
* Checks the Canvas cache for a user. If there's no cache data, updates the cache.
* @param db Database connection.
* @param user Username.
* @returns Whether the user has a saved URL and the cache data.
*/
export async function canvasCacheRetry(db: Db, user: string) {
const { hasURL, events } = await canvas.getFromCache(db, user);
if (!hasURL || !events || events.length > 0) {
return { hasURL, events };
}
// If the events are empty, there's a chance that we just didn't cache results yet
await updateCanvasCache(db, user);
return canvas.getFromCache(db, user);
}