Folder: models/

this folder is one drawer in the backend filing cabinet.

content.model.ts

Path: src/models/content.model.ts

Header from code: content.model.ts

Simple CMS-style pages: announcements and exam-info articles shown in

crowd-video-timestamp.model.ts

Path: src/models/crowd-video-timestamp.model.ts

Header from code: crowd-video-timestamp.model.ts

Community-submitted time markers on videos (“there’s a question here”)

device-token.model.ts

Path: src/models/device-token.model.ts

Header from code: device-token.model.ts

Stores Firebase Cloud Messaging (FCM) tokens per user device so push

localized-text.schema.ts

Path: src/models/localized-text.schema.ts

Header from code: localized-text.schema.ts

A reusable embedded sub-schema for text that can appear in English (en)

marketing-deal.model.ts

Path: src/models/marketing-deal.model.ts

Header from code: marketing-deal.model.ts

A commercial deal with a sponsor: amounts, status, and optional **coupon

marketing-sponsor.model.ts

Path: src/models/marketing-sponsor.model.ts

Header from code: marketing-sponsor.model.ts

CRM record for a sponsor (YouTuber/creator) we run marketing deals with.

mock-test.model.ts

Path: src/models/mock-test.model.ts

Header from code: mock-test.model.ts

Timed mock exams built from existing Question documents, with per-

notification-daily-rollup.model.ts

Path: src/models/notification-daily-rollup.model.ts

Header from code: notification-daily-rollup.model.ts

Pre-aggregated daily metrics for push notifications (sent, opened, by

notification-log.model.ts

Path: src/models/notification-log.model.ts

Header from code: notification-log.model.ts

Audit log of every push notification we attempt: template, variables,

notification-preference.model.ts

Path: src/models/notification-preference.model.ts

Header from code: notification-preference.model.ts

Per-user push notification settings in India Standard Time (IST): when

playlist.model.ts

Path: src/models/playlist.model.ts

Header from code: playlist.model.ts

Curated playlists of catalog videos — usually admin-built study paths

question.model.ts

Path: src/models/question.model.ts

Header from code: question.model.ts

Multiple-choice questions tied to a moment in a YouTube video

refresh-token.model.ts

Path: src/models/refresh-token.model.ts

Header from code: refresh-token.model.ts

Stores long-lived refresh tokens so clients can get new access tokens without

user-library-channel.model.ts

Path: src/models/user-library-channel.model.ts

Header from code: user-library-channel.model.ts

Per-user subscribed/saved YouTube channels with cached channel metadata.

user-library-video.model.ts

Path: src/models/user-library-video.model.ts

Header from code: user-library-video.model.ts

Per-user saved videos in their library (bookmark list). Denormalized

user-playlist.model.ts

Path: src/models/user-playlist.model.ts

Header from code: user-playlist.model.ts

User-created playlists of YouTube videos (by youtubeVideoId strings),

user.model.ts

Path: src/models/user.model.ts

Header from code: user.model.ts

The Mongoose model for app users — people who sign in with Google and use

video-timestamp.model.ts

Path: src/models/video-timestamp.model.ts

Header from code: video-timestamp.model.ts

A marker on a video timeline (e.g. “question at 10:33”) — either added

video.model.ts

Path: src/models/video.model.ts

Header from code: video.model.ts

Canonical catalog of YouTube videos the product knows about — metadata