# wasm_transcript_browser

This project generates a searchable transcript browser from local `.srt` files and ships it as a WebAssembly web app.

Type a word or phrase, click a match, and it opens the exact timestamp in the matching YouTube video. You can also copy a direct timestamped link.

## What it does

- Parses subtitle files (`.srt`) from a local folder.
- Generates a packed transcript index (`build/entries.inc`) at build time.
- Compiles a C codebase to `main.wasm` and serves it with a small HTML/JS shell.
- Provides instant text search over all transcript text.
- Creates timestamped YouTube links from search hits.

## How the pipeline works

1. `build_file.c` defines a hard-coded source folder:

   - `folder_to_create_transcript_for`

2. During build, `src/prototype/prototype.meta.c`:

   - scans `.srt` files in that folder,
   - parses subtitle entries,
   - normalizes text (lowercase, removes punctuation, turns `-` into spaces),
   - writes generated data to `build/entries.inc`.

3. `src/prototype/main.c` includes that generated file and compiles to WASM.

4. The browser app (`package/index.html` + `package/main.wasm`) renders a custom UI and handles link open/copy actions.

## Transcript filename format

To build correct YouTube links, filenames are expected to include the 11-char YouTube ID wrapped in one character on each side at the end of the name (commonly brackets).

Example:

- `My Video Title [dQw4w9WgXcQ].en.srt`
- `My Video Title [dQw4w9WgXcQ].srt`

The app extracts the video ID from the ending token and creates links like:

- `https://youtu.be/<id>?feature=shared&t=<seconds>`

## Build

### Prerequisites

- `clang` (or `gcc`/MSVC depending on your platform)
- Python 3 (for local static server)

### Linux

```bash
./build.sh
```

### Windows

```bat
build.bat
```

Build output of interest:

- `build/entries.inc` (generated transcript index)
- `package/index.html`
- `package/main.wasm`

## Run locally

From `package/`:

```bash
python3 -m http.server 8080
```

Then open:

- `http://localhost:8080`

Windows helper script:

- `package/run_server.bat`

## Configuration notes

- Update transcript source folder in `build_file.c` before building.
- The current build file also contains hard-coded deploy commands (`ssh`/`scp`) in `build_prototype_wasm_target`; remove or update those for your own environment.

## Project status

This is an older personal project with a custom C build/codegen stack. The rough edges are expected, but the core idea works: local transcript ingestion + fast search + one-click timestamped YouTube links.