Import documentation: CLAUDE.md

Import the existing local project snapshot. This commit organizes existing files; it does not represent newly developed functionality.

CLAUDE.md

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+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## What this is
+
+A single-file Telegram bot (`bot.py`) that receives files (and URLs) and uploads them to Google Drive. Uses **Pyrogram** (MTProto, v2+) for direct Telegram communication and **rclone** (with `gdrive:` remote) for Drive uploads. All async, all in one file.
+
+## Environment setup
+
+```bash
+source venv/bin/activate
+pip install -r requirements.txt
+```
+
+Required `.env` variables: `BOT_TOKEN`, `API_ID`, `API_HASH`. The rclone remote (`gdrive:`) must be authenticated separately via `rclone config`.
+
+## Running the bot
+
+```bash
+source venv/bin/activate
+python bot.py
+```
+
+No real tests exist beyond the stub `test_local_api.py`.
+
+## Bot commands
+
+| Command | Auth required | Description |
+|---------|---------------|-------------|
+| `/start` | No | Upload instructions + system info |
+| `/help` | No | Full command reference |
+| `/list` | Yes | Last 10 files in Drive |
+| `/listall` | Yes | All files (paginated) |
+| `/search <q>` | Yes | Search files by name |
+| `/share <name>` | Yes | Make file public + share link |
+| `/status` | Yes | Uptime, RAM, CPU, disk |
+| `/logs` | Yes | Last 50 log lines |
+| `/adduser @user` | Yes | Grant full access |
+| `/removeuser @user` | Yes | Revoke full access |
+| `/setquota @user <size>` | Yes | Set daily upload quota |
+| `/clearquota @user` | Yes | Remove quota |
+| `/quotas` | Yes | Overview all quotas |
+| `/myquota` | No | Check own quota |
+| `/restart` | Yes | Graceful restart via `os.execv` |
+
+## Architecture
+
+All logic in `bot.py` (~1368 lines). Key components:
+
+- **`handle_file`** (`@app.on_message(filters.media)`) — receives any media type (document, photo, video, audio, voice, sticker, video_note, animation). Routes to one of two upload strategies based on file size:
+  - **`_download_then_upload`** (< 2 GB) — downloads to temp dir via `client.download_media` with retry logic (3 attempts, 5/15/30s backoff) and live progress updates, then `rclone copy` to Drive. Cleans up temp files on success.
+  - **`_stream_to_drive`** (≥ 2 GB) — streams directly through RAM via `client.stream_media` → `rclone rcat` stdin, with retry logic and speed tracking. Zero disk usage.
+- **`handle_url`** (`@app.on_message(filters.text)`) — detects URLs in text messages, downloads via `rclone copyurl` (RAM-only, no disk), saves to Drive. Pulse animation during transfer.
+- **`classify_to_folder`** — routes files into Drive subfolders by extension/MIME (Videos, Music, Photos, Software, Archives, Models, Docs, etc.).
+- **`resolve_filename`** — uses caption as filename override if provided; falls back to `file_name` attribute or generates one with appropriate extension.
+- **`send_links`** — after upload, queries Drive via `rclone lsjson` for the file ID, then sends direct-download + wget links.
+
+### Auth system
+
+- **`AUTHORIZED_USERS`** set persisted in `authorized_users.json`. Anyone in this set has unlimited upload access.
+- **Quota system** in `quotas.json` schema: `{"quotas": {"username": bytes}, "usage": {"username": {"YYYY-MM-DD": bytes}}}`. Non-auth users can upload if they have a quota with remaining bytes today. Quotas auto-reset at midnight UTC.
+
+### Upload methods
+
+| Size | Method | Disk usage | CLI tool |
+|------|--------|------------|----------|
+| < 2 GB | Download then upload | Temp file on disk | `rclone copy` |
+| ≥ 2 GB | RAM stream | None | `rclone rcat` |
+| URLs (any size) | RAM stream | None | `rclone copyurl` |
+
+The 2 GB threshold is `STREAM_THRESHOLD` at line 53.
+
+### Key tech stack
+
+- **Pyrogram** v2+ — async MTProto client (`Client`), `filters.media` / `filters.command()` handlers
+- **rclone** — Drive operations: `copy`, `rcat`, `copyurl`, `lsjson`, `link`
+- **`asyncio.create_subprocess_exec`** — all rclone calls are non-blocking subprocesses
+- **`psutil`** — RAM/CPU/disk stats for `/status`
+- **`python-dotenv`** — loads `.env`
+
+### Key constraints
+
+- All handlers are `async def` — Pyrogram is fully async.
+- rclone subprocesses use `asyncio.create_subprocess_exec` — do not replace with `subprocess.run`.
+- Temp files only deleted on successful upload (manual retry on failure).
+- Filenames cleaned via `sanitize_filename` (NFKC normalization, emoji removal, illegal char stripping).
+- The bot can also handle files sent by non-auth users if they have a daily quota assigned.