Harwinder Sekhon
c6a970880c
Scanner indexes quiz files found next to videos ([&] questions, "- " options, "-- Correct" markers; _notsolved twins ignored). Quizzes appear in the folder content list interleaved with videos by filename order. New api/quiz.php serves questions without answers and grades attempts server-side; per-user best/last score and attempts stored in quiz_progress. Folder/course progress now aggregates videos + quizzes with partial credit for partial scores.
120 lines
4.5 KiB
Markdown
120 lines
4.5 KiB
Markdown
# CourseHub
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Self-hosted course video player: PHP 8.0+ + MySQL/MariaDB + Bootstrap 5 + [Plyr](https://github.com/sampotts/plyr).
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Single-page app: `index.php` is a static shell; all navigation, login, browsing,
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playback, and scanning happen over AJAX against the JSON API in `api/`
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(`auth.php`, `library.php`, `progress.php`, `scan.php`), with hash-based routes
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(`#/`, `#/folder/N`, `#/watch/N`) so views switch without page reloads and
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browser back/forward still work. Only `stream.php` (the mp4 bytes) is a plain
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HTTP resource.
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- Recursively scans a videos directory for `.mp4` files and mirrors the folder
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hierarchy (courses → sections → videos, any nesting depth).
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- Per-user **resume**: log in from any device and continue where you left off.
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- **Progress tracking at every level** — each folder shows completed/total and a
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percentage bar computed over its whole subtree.
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- "Continue watching" strip, auto-play next video, playback speed, keyboard
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shortcuts (Plyr), completed checkmarks, natural sorting (`Video2` before `Video10`).
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- Seekable streaming via HTTP Range requests; files are addressed by DB id only
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(no path traversal).
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## Layout on disk
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```
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videos/
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├── Course 1/
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│ ├── Intro/
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│ │ ├── Video1.mp4
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│ │ └── Video2.mp4
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│ └── Module 2/
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│ └── Advanced/
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│ └── lesson.mp4
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└── Course 2/
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└── ...
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```
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Top-level folders become courses on the home page.
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## Setup
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1. **Database** — create the schema and an app user:
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```bash
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sudo mysql < schema.sql
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sudo mysql -e "CREATE USER IF NOT EXISTS 'coursehub'@'localhost' IDENTIFIED BY 'coursehub';
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GRANT ALL ON coursehub.* TO 'coursehub'@'localhost';"
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```
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2. **Configure** — edit `config.php`:
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- `VIDEOS_ROOT`: absolute path to your course folders (must be readable by
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the web server / PHP user).
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- DB credentials (change the password in production).
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- `ALLOW_REGISTRATION`: set `false` once your users have accounts.
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3. **Run** — with the PHP built-in server for testing:
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```bash
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php -S 0.0.0.0:8080 -t /path/to/coursehub
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```
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or point an Apache/Nginx + PHP-FPM vhost at the directory.
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4. **Index the library** — click **Rescan library** in the top bar, or:
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```bash
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php scan.php
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```
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Rescan whenever you add/remove files. Re-scans are idempotent: existing
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videos keep their IDs (and everyone's progress); files that disappeared are
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hidden, not deleted, so progress survives if they come back.
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5. Open the site, create an account, and watch.
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## Quizzes
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Course folders may contain quiz text files next to the videos. Files named
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`*_quiz_solved.txt` are indexed (a `*_quiz_notsolved.txt` twin is ignored —
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it's the same content without answers). Format:
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```
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[&] Which two are supported CLI connectivity methods? (Select two)
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- RDP
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- rlogin
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- GUI widget -- Correct
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- FortiExplorer -- Correct
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```
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Questions start with `[&]`, options with `- `, and correct options end with
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`-- Correct`. Questions with more than one correct option automatically render
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as checkboxes instead of radios.
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Quizzes are graded server-side (answers are never sent to the browser before
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submission). A question counts only if the selected set exactly matches the
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correct set. Best score, last score, and attempt count are stored per user;
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a quiz is *completed* once every question is answered correctly in one
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attempt, and quiz scores count toward folder progress alongside videos.
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## How progress works
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- The player POSTs `{video_id, position, duration}` to `api/progress.php`
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every 5 s while playing, plus on pause/seek, via `navigator.sendBeacon`
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when the tab is hidden or closed, and when navigating to another view
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in the SPA.
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- A video is marked **completed** at ≥ 95 % watched (`COMPLETE_THRESHOLD`).
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Completion is sticky — rewatching doesn't un-complete it.
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- Folder progress is computed over the folder's entire subtree using a path
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prefix match, with partial credit for videos in progress.
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- Video duration is captured from the browser on first play (no ffprobe
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dependency) and cached on the `videos` row.
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## Production notes
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- PHP streams the video in 512 KB chunks with Range support, which is fine for
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a handful of users. For heavier use, serve files with `X-Accel-Redirect`
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(Nginx) or `X-Sendfile` (Apache) instead of streaming through PHP.
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- Put the app behind HTTPS and set `session.cookie_secure=1`.
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- Deny direct web access to `includes/`, `config.php`, and `schema.sql`
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(or place the videos and includes outside the docroot).
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