finished discord > adapter functionality

.gitignore

@@ -1,34 +1,35 @@
-# --- python bytecode ---
+# --- python bytecode ---
-__pycache__/
+__pycache__/
-*.py[cod]
+*.py[cod]
-*$py.class
+*$py.class
-
+
-# --- virtual environments ---
+# --- virtual environments ---
-.venv/
+.venv/
-venv/
+venv/
-env/
+env/
-
+
-# --- environment files ---
+# --- environment files ---
-.env
+.env
-.env.*
+.env.*
-*.local
+*.local
-
+
-# --- emacs ---
+# --- emacs ---
-*~
+*~
-\#*\#
+\#*\#
-.\#*
+.\#*
-*.elc
+*.elc
-
+
-# --- project private data ---
+# --- project private data ---
-/private/
+/private/
-archive/
+archive/
-downloads/
+downloads/
-data.json
+test/
-
+data.json
-# --- django ---
+
-db.sqlite3
+# --- django ---
-staticfiles/
+db.sqlite3
-media/
+staticfiles/
-
+media/
-# --- misc ---
+
+# --- misc ---
 .DS_Store

README.md

@@ -1,8 +1,10 @@
-build and run the docker container
+v2 architecture draft: see `docs/architecture-v2.org`
-```
+
-api_token = [discord bot token]
+build and run the docker container
--v [downloads]:/downloads
+```
--v [config]:/config
+DISCORD_BOT_TOKEN = [discord bot token]
-```
+-v [downloads]:/downloads
-config contains data to persist across container updates, i.e., unraid appdata, 
+-v [config]:/config
-such as users.json (authorized users) and yt-dlp's archive.txt
+```
+config contains data to persist across container updates, i.e., unraid appdata, 
+such as yt-dlp's archive.txt

agents.md

@@ -0,0 +1,24 @@
+# agent rules
+
+## priorities
+- optimize for simplicity, boringness, and long-term maintainability
+- prefer minimal diffs; avoid refactors unless required for the active task
+
+## tech stack
+- python
+- file storage: json and csv, no sqlite or databases
+- assume local virtual env is available and accessible
+- do not add new dependencies unless explicitly approved; if unavoidable, document justification in the active task notes
+
+## workflow
+- work on ONE task at a time unless explicitly instructed otherwise
+- at the start of work, state the task id you are executing
+- do not start work unless a task id is specified; if missing, choose the earliest unchecked task and say so
+- propose incremental steps
+- always include basic tests for core logic
+- add assumptions and questions along-the-way to the ** notes section under the active task 
+- when you complete a task:
+  - mark it [X] in pm/tasks.org
+  - fill in evidence with commit hash + commands run
+  - never mark complete unless acceptance criteria are met
+  - include date and time (HH:MM)

default-yt-dlp.conf

@@ -1,11 +1,8 @@
-# yt-dlp config file (yt-dlp.conf or .config/yt-dlp/config)
+# yt-dlp config file
---simulate
+-f "bestvideo[ext=mp4]+bestaudio[ext=m4a]/best[ext=mp4]/best"
--f "bestvideo[ext=mp4]+bestaudio[ext=m4a]/best[ext=mp4]/best"
+--embed-chapters
---embed-chapters
+--embed-info-json
---embed-info-json
+--write-playlist-metafiles
---write-playlist-metafiles
+--download-archive "/config/archive.txt"
-#--paths "{"home":"./downloads"}"
+--restrict-filenames
---download-archive "/config/archive.txt"
+--output "/downloads/%(uploader)s/%(playlist_title)s/%(playlist_index)s%(playlist_index& - )s%(title)s.%(ext)s"
---restrict-filenames
---output "/downloads/%(uploader)s/%(playlist_title)s/%(playlist_index)s%(playlist_index& - )s%(title)s.%(ext)s"
-# --split-chapters

docs/architecture-v2.org

@@ -0,0 +1,248 @@
+#+TITLE: youdis v2 architecture
+#+DATE: [2026-03-31 Tue]
+#+VERSION: 3
+
+* Purpose
+Youdis v2 splits the current monolithic Discord bot into:
+- a private backend worker service that owns yt-dlp execution
+- thin chat adapters that translate user actions into backend requests
+
+The goal is to make downloader behavior inspectable, reusable, and easier to debug across multiple frontends without introducing queueing infrastructure or complex deployment.
+
+** Goals
+- Keep the backend transport-agnostic.
+- Preserve archive-first duplicate prevention via `archive.txt`.
+- Keep single-job semantics explicit.
+- Treat requester and origin metadata as informational, not authorization.
+- Make yt-dlp configuration understandable and debuggable.
+
+** Non-Goals
+- No backend auth or user membership logic.
+- No database, Redis, or external queue.
+- No multi-worker scheduling in v2.
+- No frontend-owned downloader logic.
+
+* Proposed Components
+** Backend worker service
+Owns:
+- request validation
+- single active job state
+- yt-dlp executable invocation
+- yt-dlp configuration selection and runtime argument construction
+- archive behavior
+- output path behavior
+- progress and final result events
+
+Does not own:
+- Discord slash-command parsing
+- chat formatting decisions
+- access control policy
+
+** Frontend adapters
+1. Discord
+2. Zulip
+3. XMPP
+
+Own:
+- command parsing
+- user-facing message formatting
+- transport-specific reply behavior
+- optional frontend-side gating if the deployment wants it
+
+Do not own:
+- yt-dlp option construction
+- archive checks
+- output path logic
+- job lifecycle rules
+
+* Initial Deployment Shape
+
+V2 should start as a single private process boundary with two layers:
+1. backend service process
+2. one Discord adapter process
+
+The backend is intended for private/local deployment. Trust comes from deployment topology and network placement, not backend auth.
+
+** Execution model
+The backend is a thin FastAPI wrapper around the `yt-dlp` executable, not a deep Python integration, unless proven necessary.
+
+Why this is the default:
+- keeps behavior closer to native `yt-dlp`
+- makes container debugging easier because commands can be reproduced manually
+- avoids reimplementing `yt-dlp` option parsing unless we truly need tighter integration
+
+This means the backend is primarily responsible for:
+- deciding when `yt-dlp` may run
+- constructing a safe effective command
+- supervising the subprocess while it is active
+- translating process outcomes into a small API contract
+
+** Backend Contract
+*** Request model
+Minimal fields:
+- `url`
+- `requester_id` optional
+- `requester_name` optional
+- `origin` optional
+- `requested_at` optional
+Only `url` affects downloader behavior in v2. The rest is passthrough metadata for logs and frontend context.
+
+*** Result states
+The backend should keep its external state model deliberately small:
+- `accepted`
+- `busy`
+- `running`
+- `completed`
+- `failed`
+- `cancelled`
+
+These states should be transport-agnostic, human-debuggable, and only distinct when a frontend would behave differently.
+
+Internal phases and details may be richer, but they should usually be carried as metadata rather than promoted to top-level states.
+
+Examples of detail fields that can travel alongside the small state model:
+- `phase=validating`
+- `phase=downloading`
+- `disposition=archive_hit`
+- `message=already in archive`
+- `result_path=/downloads/...`
+
+This keeps the API simple while still leaving room for useful operator-facing detail.
+
+*** Minimal endpoints
+The first backend seam should stay small:
+- `POST /jobs`
+- `GET /jobs/current`
+- `POST /jobs/current/cancel`
+- `GET /health`
+- `GET /version`
+
+Polling is the default integration model for v2. Streaming or push delivery is deferred unless a real frontend need appears.
+
+** Single-Job Semantics
+V2 explicitly supports one active job at a time.
+- If idle, the backend accepts a new job and marks it active.
+- If busy, the backend rejects the new request with a `busy` result.
+- Cancel is coarse and best-effort.
+- The backend clears active state when the job reaches `completed`, `failed`, or `cancelled`.
+
+This is a feature, not a limitation, for the initial service.
+
+* yt-dlp Configuration Ownership
+
+This is the most important v2 cleanup.
+
+The backend owns all yt-dlp invocation behavior. Frontends must not build `yt-dlp` commands or option dictionaries.
+
+** Config split
+
+Static settings belong in `default-yt-dlp.conf`:
+- archive path
+- output template
+- embedding and metadata preferences
+- stable format defaults
+- retry defaults
+
+Runtime settings belong in backend code:
+- target URL
+- config-file path, if explicitly set at launch
+- request-scoped flags or overrides
+- subprocess lifecycle and cancellation behavior
+- any values that must vary per request
+
+*** Merge rule
+The backend should invoke `yt-dlp` with the default config first, then apply a small set of explicit runtime overrides.
+
+If a runtime override conflicts with file-backed config, the override wins and the backend should log the effective value used.
+
+*** Debuggability requirement
+For each job, the backend should make it easy to inspect:
+
+- config file path used
+- effective `yt-dlp` command or key override arguments
+- final normalized job result
+
+This exists specifically because the current config behavior has been difficult to reason about.
+
+*** Config hygiene expectations
+
+The default config should be safe for real downloads in production-like use.
+
+That means test-only settings such as `--simulate` should not remain enabled in the default runtime path unless the backend intentionally supports an explicit dry-run mode.
+
+** Recommended Repo Shape
+One reasonable first cut:
+
+#+begin_quote
+youdis/
+  README.md
+  default-yt-dlp.conf
+  youdis/
+    __init__.py
+    main.py
+    models.py
+    adapters/
+      __init__.py
+      discord.py
+  docs/
+    architecture-v2.org
+#+end_quote
+
+Notes:
+
+- `main.py` owns the FastAPI app, active-job state, and `yt-dlp` subprocess lifecycle.
+- `models.py` owns request and response models.
+- `adapters/discord.py` becomes a thin client of the backend.
+
+** Example response shape
+
+One likely response shape for v1:
+
+#+begin_src json
+{
+  "state": "completed",
+  "disposition": "archive_hit",
+  "message": "already in archive",
+  "job_id": "abc123"
+}
+#+end_src
+
+And for an active job:
+
+#+begin_src json
+{
+  "state": "running",
+  "phase": "downloading",
+  "message": "downloading 3 of 9",
+  "job_id": "abc123"
+}
+#+end_src
+
+** Framework Recommendation
+
+FastAPI is the current recommendation for the backend seam.
+
+Why it fits:
+
+- typed request and response models help define the contract cleanly
+- built-in docs make local inspection easier during early iterations
+- it stays small enough for this service if we keep the surface area disciplined
+
+Why this is not a strong ideological choice:
+
+- Flask would also work if we decide the type/model ergonomics are not worth it
+- the important decision is keeping the seam small, not choosing a fashionable framework
+
+** Immediate Next Task
+
+`2.0.1` should implement the backend skeleton with just enough real behavior to prove the seam:
+
+- package/module layout
+- health and version endpoint
+- single active-job state holder
+- one submit-job path
+- one current-job status path
+- `yt-dlp` subprocess invocation using `default-yt-dlp.conf`
+- explicit runtime overrides for request URL and cancel behavior
+
+The Discord adapter should remain unchanged until that backend skeleton can accept a job and report status coherently.

pm/task-sample.org

@@ -2,15 +2,17 @@
 #+updated: [2026-03-31 Tue 16:03]
 
 Use the template below, which should be a top-level org-mode header.
+A sample task is below the template
 
-* [ ] M.m.m: Task Title (# commits)
+* [ ] M.m.m: Task Title (<estimated # of commits>)
 description of the task
 ** pm notes: amplifying information
 
 ** Acceptance Criteria
 1. Criterion
    - expanded data
-2. Criterion 
+2. Criterion
+3f. Criterion added after initial task completion   
 
 ** evidence
 - commit: abc123, bcd234
@@ -19,3 +21,61 @@ description of the task
 
 ** notes    
 - explanation of work done, decisions made, reasoning
+
+  
+* [ ] 2.0.1: build backend yt-dlp worker (3)
+create the minimal backend/service skeleton and establish a working yt-dlp baseline with clean hooks for future frontends
+** pm notes
+- foundation; don't need the full finished service here, just the basic shape plus enough real yt-dlp execution to validate the seam and build on it.
+- keep single-job semantics
+- prioritize inspectable behavior over polish
+
+** Acceptance Criteria
+1. create the backend/service skeleton
+   - app/module layout exists
+   - core request path is stubbed or minimally working
+2. establish a working yt-dlp baseline
+   - archive behavior is preserved
+   - output path behavior is preserved or intentionally updated
+   - use yt-dlp .conf and set reasonable default
+3. expose basic hooks/interfaces for future frontends
+   - submit/request path exists
+   - status/progress hook exists
+   - basic health/version visibility exists
+4f. print env vars to stdout on fastapi launch
+   - repo_root
+   - default_config
+   - ytdlp_executable
+5f. create ytdlp conf to facilitate tests     
+** evidence
+- commit:
+- tests:
+  1. `python3 -m py_compile ./youdis/main.py ./youdis/models.py ./youdis/adapters/__init__.py ./youdis/adapters/discord.py`
+  2. `python3 -m uvicorn youdis.main:app --host 127.0.0.1 --port 8000`
+  3. `sudo curl -L https://github.com/yt-dlp/yt-dlp/releases/download/2026.03.17/yt-dlp -o /usr/local/bin/yt-dlp`
+  4. `sudo chmod +x /usr/local/bin/yt-dlp`
+  5. `yt-dlp --version`
+  6. `curl http://127.0.0.1:8000/health`
+  7. `curl http://127.0.0.1:8000/version`
+  8. `curl -X POST http://127.0.0.1:8000/jobs -H 'content-type: application/json' -d '{"url":"https://www.youtube.com/watch?v=dQw4w9WgXcQ"}'`
+  9. `curl http://127.0.0.1:8000/jobs/current`
+  10. if testing in container: `docker build -t youdis:v2 .`
+  11. if testing in container: `docker run --rm -p 8000:8000 -v [config]:/config -v [downloads]:/downloads youdis:v2`
+  :OUTPUT_STEP1-9:
+  user@paladin:~/proj/youdis$ curl http://127.0.0.1:8000/health
+{"status":"ok"}user@paladin:~/proj/youdis$
+user@paladin:~/proj/youdis$ curl http://127.0.0.1:8000/version
+{"version":"20250829-ec72c56","active_job":false}user@paladin:~/proj/youdis$
+user@paladin:~/proj/youdis$ curl -X POST http://127.0.0.1:8000/jobs -H 'content-type: application/json' -d '{"url":"https://www.youtube.com/watch?v=3i72yY_LaW4"}'
+{"job_id":"cc85165e-d906-4eee-864f-1a398b6de2e0","state":"accepted","url":"https://www.youtube.com/watch?v=3i72yY_LaW4","message":"accepted","phase":"queued","disposition":null,"requester_id":null,"requester_name":null,"origin":null,"result_path":null,"command":[],"returncode":null,"created_at":"2026-04-01T00:44:35.657196","updated_at":"2026-04-01T00:44:35.657198"}user@paladin:~/proj/youdis$ curl http://127.0.0.1:8000/jobs/current
+{"active":false,"job":{"job_id":"cc85165e-d906-4eee-864f-1a398b6de2e0","state":"failed","url":"https://www.youtube.com/watch?v=3i72yY_LaW4","message":"ERROR: unable to create directory [Errno 13] Permission denied: '/downloads'","phase":null,"disposition":null,"requester_id":null,"requester_name":null,"origin":null,"result_path":null,"command":["yt-dlp","--config-locations","/home/user/proj/youdis/default-yt-dlp.conf","https://www.youtube.com/watch?v=3i72yY_LaW4"],"returncode":1,"created_at":"2026-04-01T00:44:35.657196","updated_at":"2026-03-31T20:44:36.653353"}}user@paladin:~/proj/youdis$
+  :END:
+- datetime: [2026-03-31 Tue 20:45]
+
+** notes
+- validate `yt-dlp` subprocess invocation in-container; not verifiable in the current shell because `yt-dlp` is not installed here
+- confirm `--config-locations` behavior against the installed `yt-dlp` version during integration testing
+- current backend scaffold is not yet wired into `dockerfile` or `run-youdis.sh`
+- archive-hit and result-path parsing currently depend on `yt-dlp` stdout text patterns, so treat them as provisional until integration-tested
+
+  

pm/tasks-v2.org

@@ -0,0 +1,300 @@
+#+title: Task Log
+#+updated: [2026-03-31 Tue 16:03]
+#+startup: overview
+# Local Variables:
+# org-babel-python-command: "/home/user/proj/youdis/.venv/bin/python"
+# project-dir: "~/proj/youdis"
+# End:
+
+* youdis v2 goals:
+1. Separate backend from frontend
+2. Offload auth
+3. Ensure auto nightly builds
+4. Default output format supports plex browsing youtube channels as "tv shows"
+5. Facilitate multiple GUI inbounds: Discord, Zulip, XMPP
+
+* [X] 2.0.0: define architecture (2-4)
+define the target architecture for a private backend yt-dlp worker with thin chat frontends
+** pm notes:
+- keep this iterative. the point is to choose the shape and seam, not prematurely implement infra. likely decisions include backend framework, request/status model, and how thin the discord shim should be.
+- goal is simple, private, maintainable deployment
+- avoid auth, queues, or persistence beyond clear & immediate needs
+
+** Acceptance Criteria
+1. document the target architecture at a high level
+   - backend owns yt-dlp execution and job state
+   - frontends own chat-specific UX
+2. identify key decisions still open
+   - backend choice
+   - service seam/endpoints
+   - status/progress model
+3. capture enough structure to begin implementation
+   - repo/component layout is sketched
+   - next implementation task is unblocked
+
+** evidence
+- commit: 0ed16ec
+- tests: n/a
+- datetime: [2026-03-31 Tue 18:48]
+
+** notes
+- first architecture draft captured in `docs/architecture-v2.org`
+
+* [X] 2.0.1: build backend yt-dlp worker (3)
+create the minimal backend/service skeleton and establish a working yt-dlp baseline with clean hooks for future frontends
+** pm notes
+- foundation; don't need the full finished service here, just the basic shape plus enough real yt-dlp execution to validate the seam and build on it.
+- keep single-job semantics
+- prioritize inspectable behavior over polish
+
+** Acceptance Criteria
+1. create the backend/service skeleton
+   - app/module layout exists
+   - core request path is stubbed or minimally working
+2. establish a working yt-dlp baseline
+   - archive behavior is preserved
+   - output path behavior is preserved or intentionally updated
+   - use yt-dlp .conf and set reasonable default
+3. expose basic hooks/interfaces for future frontends
+   - submit/request path exists
+   - status/progress hook exists
+   - basic health/version visibility exists
+4. make local testing practical without breaking container defaults
+   - backend can run when `/config` or `/downloads` are not writable in local dev
+   - env vars may override executable/config/download paths
+   - status makes the effective runtime command/paths inspectable
+
+** evidence
+- commit: 7926534,2a56485
+- tests:
+  1. `python3 -m py_compile ./youdis/main.py ./youdis/models.py ./youdis/adapters/__init__.py ./youdis/adapters/discord.py`
+  2. `python3 -m uvicorn youdis.main:app --host 127.0.0.1 --port 8000`
+  3. `sudo curl -L https://github.com/yt-dlp/yt-dlp/releases/download/2026.03.17/yt-dlp -o /usr/local/bin/yt-dlp`
+  4. `sudo chmod +x /usr/local/bin/yt-dlp`
+  5. `yt-dlp --version`
+  6. `curl http://127.0.0.1:8000/health`
+  7. `curl http://127.0.0.1:8000/version`
+  8. `curl -X POST http://127.0.0.1:8000/jobs -H 'content-type: application/json' -d '{"url":"https://www.youtube.com/watch?v=dQw4w9WgXcQ"}'`
+  9. `curl http://127.0.0.1:8000/jobs/current`
+  10. if testing in container: `docker build -t youdis:v2 .`
+  11. if testing in container: `docker run --rm -p 8000:8000 -v [config]:/config -v [downloads]:/downloads youdis:v2`
+  :OUTPUT_STEP1-9:
+  user@paladin:~/proj/youdis$ curl http://127.0.0.1:8000/health
+{"status":"ok"}
+  user@paladin:~/proj/youdis$ curl http://127.0.0.1:8000/version
+{"version":"20250829-ec72c56","active_job":false}
+user@paladin:~/proj/youdis$ curl -X POST http://127.0.0.1:8000/jobs -H 'content-type: application/json' -d '{"url":"https://www.youtube.com/watch?v=3i72yY_LaW4"}'
+{"job_id":"cc85165e-d906-4eee-864f-1a398b6de2e0","state":"accepted","url":"https://www.youtube.com/watch?v=3i72yY_LaW4","message":"accepted","phase":"queued","disposition":null,"requester_id":null,"requester_name":null,"origin":null,"result_path":null,"command":[],"returncode":null,"created_at":"2026-04-01T00:44:35.657196","updated_at":"2026-04-01T00:44:35.657198"}
+user@paladin:~/proj/youdis$ curl http://127.0.0.1:8000/jobs/current
+{"active":false,"job":{"job_id":"cc85165e-d906-4eee-864f-1a398b6de2e0","state":"failed","url":"https://www.youtube.com/watch?v=3i72yY_LaW4","message":"ERROR: unable to create directory [Errno 13] Permission denied: '/downloads'","phase":null,"disposition":null,"requester_id":null,"requester_name":null,"origin":null,"result_path":null,"command":["yt-dlp","--config-locations","/home/user/proj/youdis/default-yt-dlp.conf","https://www.youtube.com/watch?v=3i72yY_LaW4"],"returncode":1,"created_at":"2026-04-01T00:44:35.657196","updated_at":"2026-03-31T20:44:36.653353"}}user@paladin:~/proj/youdis$
+  :END:
+- datetime: [2026-03-31 Tue 20:45]
+
+** notes
+- validate `yt-dlp` subprocess invocation in-container; not verifiable in the current shell because `yt-dlp` is not installed here
+- confirm `--config-locations` behavior against the installed `yt-dlp` version during integration testing
+- current backend scaffold is not yet wired into `dockerfile` or `run-youdis.sh`
+- archive-hit and result-path parsing currently depend on `yt-dlp` stdout text patterns, so treat them as provisional until integration-tested
+- local dev now falls back to repo-local `.runtime/{config,downloads}` when `/config` or `/downloads` are not writable
+- had to uninstall yt-dlp python pkg from the venv, which resulted in a '403 Forbidden'
+  
+* [X] 2.0.2: update discord bot to use new backend (3)
+update the discord bot into a thin frontend that talks to the backend and verify the flow end to end
+** pm notes
+- this is the first real frontend proof. once this works cleanly, zulip/xmpp should mostly be adapter work rather than downloader rewrites.
+- keep discord logic thin; no auth
+- do not duplicate yt-dlp behavior in the bot
+
+** Acceptance Criteria
+1. discord bot submits requests to backend
+   - command/input handling works
+   - acceptance/busy/failure responses are clear
+2. discord bot relays useful backend status
+   - progress reporting works at a basic level
+   - completion/failure/skipped outcomes are surfaced
+3. backend-discord flow is tested end to end
+   - valid request path tested
+   - busy or conflict behavior tested
+   - failure path tested
+4. add dotenv support to ease dev
+   - os.getenv methods remain standard for prod/docker build
+   - populate .env with dev env defaults
+   
+** evidence
+- commit: 5210d2c, 043cb4
+- tests: https://youtu.be/20HxMMSqRyg?si=3v7mN2L88c_FxpQR 18m
+  1. start backend: `python3 -m uvicorn youdis.main:app --host 127.0.0.1 --port 8000`
+  2. create local env file: `cp .env.example .env`
+  3. add `api_token` to `.env`
+  4. start adapter: `python3 ./youdis.py`
+  5. in discord, run `/youtube url:https://www.youtube.com/watch?v=dQw4w9WgXcQ`
+     :out:
+     #+begin_src shell
+     (venv) user@paladin:~/proj/youdis$ python ./youdis.py
+Task exception was never retrieved
+future: <Task finished name='Task-43' coro=<Client._dispatch_interaction() done, defined at /home/user/proj/youdis/venv/lib/python3.10/site-packages/interactions/client/client.py:1773> exception=KeyError('youtube')>
+Traceback (most recent call last):
+  File "/home/user/proj/youdis/venv/lib/python3.10/site-packages/interactions/client/client.py", line 1798, in _dispatch_interaction
+    if ctx.command:
+  File "/home/user/proj/youdis/venv/lib/python3.10/site-packages/interactions/models/internal/context.py", line 329, in command
+    return self.client._interaction_lookup[self._command_name]
+KeyError: 'youtube'
+    #+end_src
+     :end:
+
+  6. confirm channel response says the job was submitted to backend
+  7. confirm requester receives DM updates for accepted/running/completed or failed
+    :out:
+     accepted job 4ef6fde5-57cc-478c-b0e2-18458c693fa4 for https://www.youtube.com/watch?v=dQw4w9WgXcQ
+state=running | phase=running | [youtube] dQw4w9WgXcQ: Downloading webpage | path=/home/user/proj/youdis/downloads
+state=running | phase=downloading | [download] Destination: /home/user/proj/youdis/downloads/Rick_Astley/NA/NANARickAstley-_Never_Gonna_Give_You_Up_Official_Video_4K_Remaster.f401.mp4 | path=/home/user/proj/youdis/downloads/Rick_Astley/NA/NANARickAstley-_Never_Gonna_Give_You_Up_Official_Video_4K_Remaster.f401.mp4
+state=completed | [Metadata] There isn't any metadata to add | path=/home/user/proj/youdis/downloads/Rick_Astley/NA/NANARickAstley-_Never_Gonna_Give_You_Up_Official_Video_4K_Remaster.mp4
+:end:
+  8. while first job is active, submit another `/youtube` and confirm busy behavior
+    :out:
+    #+begin_src shell
+    Error: AttributeError
+Traceback (most recent call last):
+  File "/home/user/proj/youdis/venv/lib/python3.10/site-packages/interactions/client/client.py", line 1900, in __dispatch_interaction
+    response = await callback
+  File "/home/user/proj/youdis/venv/lib/python3.10/site-packages/interactions/client/client.py", line 1771, in _run_slash_command
+    return await command(ctx, **ctx.kwargs)
+  File "/home/user/proj/youdis/venv/lib/python3.10/site-packages/interactions/models/internal/command.py", line 132, in __call__
+    await self.call_callback(self.callback, context)
+  File "/home/user/proj/youdis/venv/lib/python3.10/site-packages/interactions/models/internal/application_commands.py", line 833, in call_callback
+    return await self.call_with_binding(callback, ctx, *new_args, **new_kwargs)
+  File "/home/user/proj/youdis/venv/lib/python3.10/site-packages/interactions/models/internal/callback.py", line 43, in call_with_binding
+    return await callback(*args, **kwargs)
+  File "/home/user/proj/youdis/youdis/adapters/discord.py", line 167, in youtube
+    await ctx.channel.send(f"Submitted <{url}> to the backend. Status updates via DM.")
+AttributeError: 'NoneType' object has no attribute 'send'
+   #+end_src
+    busy: busy with https://youtu.be/20HxMMSqRyg?si=3v7mN2L88c_FxpQR
+state=running | phase=running | cancel requested | path=/home/user/proj/youdis/downloads/James_Hoffmann/NA/NANAThe_Beginner_s_Guide_To_Latte_Art.f401.mp4
+    :end:
+  9. run `/status` and confirm it reflects current or last backend job
+    :out:
+     last job: state=completed | [Metadata] There isn't any metadata to add | path=/home/user/proj/youdis/downloads/Rick_Astley/NA/NANARickAstley-_Never_Gonna_Give_You_Up_Official_Video_4K_Remaster.mp4
+     :end:
+  10. run `/interrupt` as owner and confirm cancellation is surfaced via DM
+    :out:
+    last job: state=cancelled | cancelled | path=/home/user/proj/youdis/downloads/James_Hoffmann/NA/NANAThe_Beginner_s_Guide_To_Latte_Art.f401.mp4
+    :end:
+- datetime:[2026-04-02 Thu 11:52]
+
+*** org-block tests
+#+begin_src shell :dir ~/proj/youdis :results output verbatim
+  source ./venv/bin/activate
+  python3 -m uvicorn youdis.main:app --host 127.0.0.1 --port 8000
+#+end_src
+
+#+begin_src shell :results output
+echo ok
+#+end_src
+
+#+RESULTS:
+: ok
+
+#+begin_src python :dir ~/proj/youdis :results output verbatim
+python ./youdis.py  
+#+end_src
+
+#+RESULTS:
+
+** notes
+- discord adapter is now a thin HTTP client of the backend; it no longer imports or configures yt-dlp
+- `YOUDIS_BACKEND_URL` controls which backend the adapter targets
+- progress updates are currently implemented by polling `/jobs/current` and DMing only when the summary changes
+- legacy auth/user-management commands were removed from the active adapter path
+- `.env` is now supported for local/dev convenience, while real environment variables still override it in prod/docker
+- command registration required explicit binding plus `@bot.listen()` listeners in this adapter structure
+* [X] 2.0.3: remove deprecated discord-bot functionality (2)
+delete or retire legacy bot behaviors that no longer fit once the backend split is in place
+** pm notes
+- only remove this after the new path works. this is cleanup, not pioneering work.
+- favor deletion over compatibility shims
+- keep operator controls only if still useful
+
+** Acceptance Criteria
+1. remove obsolete auth/user-management behavior
+   - old user persistence and commands are removed
+   - backend-facing flow no longer depends on them
+2. remove obsolete downloader/runtime logic from bot
+   - bot no longer owns yt-dlp execution
+   - dead code paths are deleted
+3. leave the bot in a coherent state
+   - remaining commands reflect actual supported behavior
+   - deprecated artifacts are clearly removed or marked
+
+** evidence
+- commit: 0aa9950
+- tests:
+  1. `python3 -m py_compile ./youdis.py ./youdis/adapters/discord.py`
+  2. `rg -n "users.json|api_token" README.md unraid-ca-template.xml youdis.py youdis/adapters/discord.py`
+  3. start backend: `python3 -m uvicorn youdis.main:app --host 127.0.0.1 --port 8000`
+  4. start adapter: `python3 ./youdis.py`
+  5. in discord, run `/youtube`, `/status`, and `/interrupt` and confirm the adapter still works after cleanup
+- datetime: [2026-04-02 Thu 12:09]
+
+** notes
+- active bot path no longer includes local auth or user-management behavior
+- top-level `youdis.py` remains as a thin launcher so existing operator habits and scripts do not break during the refactor
+- cleanup updated user-facing deployment artifacts to match the v2 naming and architecture, including `DISCORD_BOT_TOKEN` and removal of `users.json` references
+- archived planning docs were intentionally left untouched: `pm/tasks.org` is historical and `pm/notes.org` is personal working notes
+
+* [ ] 2.0.4: fix automation and build pipeline (3)
+repair and simplify the build/update/deploy path so it matches the new backend-plus-frontend structure
+** pm notes
+- this should come after architecture and discord integration stabilize. no point polishing the pipeline for the wrong shape.
+- optimize for simple manual ops first
+- stop here after pipeline is sane
+  
+** Acceptance Criteria
+1. align build artifacts with the new structure
+   - docker/build scripts reflect current components
+   - runtime assumptions are consistent
+2. review old automation artifacts
+   - stale runner/update/restart logic is removed or updated
+   - manual update/rebuild flow is clear
+3. confirm deployment path works
+   - local or unraid deployment is validated
+   - pipeline is understandable enough to maintain
+
+** evidence
+- commit:
+- tests:
+- datetime:
+
+** notes
+
+* ==== BACKLOG ====
+Tasks below this line are inactive and should not be touched.
+* [ ] X.x.x: clean up discord adapter UI
+
+** acceptance criteria
+1. fix interaction pattern so it doesnt time out - prefer "command accepted" or somehting
+2. remove all intermediate messages between "accepted/running" and "complete" - /status handles this!
+   - discord can also output a "busy" signal, research this
+3. fix output syntax, we dont need to get crazy with discord cards 
+
+** evidence
+- commit:
+- tests:
+- date:
+
+** notes
+
+* [ ] X.x.x: fix youtube -> plex default output 
+
+** acceptance criteria
+1. 
+- 
+
+** evidence
+- commit:
+- tests:
+- date:
+
+** notes
+
+* /

unraid-ca-template.xml

@@ -8,11 +8,11 @@
   <Privileged>false</Privileged>
   <Support>[Unraid Support Thread]</Support>
   <Project>https://github.com/eulaly/youdis</Project>
-  <Overview>Discord bot-based wrapper for yt-dlp. Let your friends download videos to your server! Supports playlists, requires a configured Discord bot.</Overview>
+  <Overview>Private yt-dlp worker with a Discord adapter. Submit downloads through Discord while the backend owns yt-dlp execution and job state.</Overview>
   <Category>Downloaders: Tools:</Category>
   <TemplateURL>https://raw.githubusercontent.com/eulaly/unraid-templates/refs/heads/master/unraid-ca-template.xml</TemplateURL>
   <Icon>https://github.com/eulaly/youdis/blob/c978a2326984efa9670678687ed1a1473478d753/yt_dlp.png</Icon>
-  <Config Name="api_token" Target="api_token" Default="" Mode="" Description="Discord bot token" Type="Variable" Display="always" Required="true" Mask="true"/>
+  <Config Name="DISCORD_BOT_TOKEN" Target="DISCORD_BOT_TOKEN" Default="" Mode="" Description="Discord bot token" Type="Variable" Display="always" Required="true" Mask="true"/>
   <Config Name="Downloads" Target="/downloads" Default="" Mode="rw" Description="Video download location" Type="Path" Display="always" Required="false"/>
-  <Config Name="Config" Target="/config" Default="/mnt/user/appdata/youdis/config" Mode="rw" Description="Config location (archive.txt, users.json)" Type="Path" Display="always" Required="false"/>
+  <Config Name="Config" Target="/config" Default="/mnt/user/appdata/youdis/config" Mode="rw" Description="Config location (archive.txt and backend runtime data)" Type="Path" Display="always" Required="false"/>
 </Container>

youdis.py

@@ -1,235 +1,8 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python3
-'''
+"""Launcher shim for the Discord adapter."""
-youdis v1.1
-bot for downloading youtube videos using yt-dlp
-discord-py-interactions 5.11.0 has new option
-   requires python>=3.9
-'''
-# match_filter: info_dict -> Raise utils.DownloadCancelled(msg) ? interrupt
-
-import interactions
-from os import getenv
-from pathlib import Path
-import yt_dlp
-import json
-import asyncio
-import threading
 
-userFile = Path('/config/users.json')
+from youdis.adapters.discord import main
-userFile.parent.mkdir(exist_ok=True, parents=True)
-
-bot = interactions.Client(intents=interactions.Intents.DEFAULT,default_scope=2147491904)
-
-def save_authorized_users(authorized_users):
-    with open(userFile, 'w') as f:
-        json.dump({'authorized_users': authorized_users}, f)
-
-def load_authorized_users():
-    if not userFile.exists():
-        save_authorized_users([])
-        print(f'users.json not found; saving to {userFile}')
-        return []
-
-    try:
-        with open(userFile, 'r') as f:
-            data = json.load(f)
-    except (json.JSONDecodeError, OSError):
-        save_authorized_users([])
-        print(f'users.json invalid; resetting {userFile}')
-        return []
-
-    authorized_users = data.get('authorized_users', [])
-    if not isinstance(authorized_users, list):
-        authorized_users = []
-
-    authorized_users = [str(user_id) for user_id in authorized_users]
-    save_authorized_users(authorized_users)
-    print(f'authorized_users:{authorized_users}')
-    return authorized_users
-
-authorized_users = load_authorized_users()
-
-active_job_lock = threading.Lock()
-active_job = None
-
-async def send_message(ctx, message):
-    await ctx.author.send(message)
-
-def claim_active_job(job):
-    global active_job
-    with active_job_lock:
-        if active_job is not None:
-            return active_job
-        active_job = job
-        return None
-
-def get_active_job():
-    with active_job_lock:
-        return active_job
-
-def clear_active_job(job):
-    global active_job
-    with active_job_lock:
-        if active_job is job:
-            active_job = None
-
-def download_video(url, options):
-    with yt_dlp.YoutubeDL(options) as ydl:
-        ydl.download(url)
-
-def create_hook(ctx, loop, cancel_event):
-    seen_updates = set()
-
-    def hook(d):
-        if cancel_event.is_set():
-            raise yt_dlp.utils.DownloadCancelled('download canceled by /interrupt')
-
-        status = d.get('status')
-        info = d.get('info_dict') or {}
-
-        if status not in {'downloading', 'finished'}:
-            return
-
-        filename = d.get('filename') or info.get('_filename') or info.get('title')
-        update_key = (status, filename)
-        if update_key in seen_updates:
-            return
-
-        seen_updates.add(update_key)
-        playlist_index = info.get('playlist_index')
-        playlist_count = info.get('playlist_count')
-        url = info.get('webpage_url')
-
-        prefix = status
-        if playlist_index and playlist_count:
-            prefix = f'{status} {playlist_index} of {playlist_count}'
-
-        msg = f'{prefix}: {filename}'
-        if url:
-            msg = f'{msg} <{url}>'
-
-        asyncio.run_coroutine_threadsafe(send_message(ctx, msg), loop)
-
-    return hook
-
-@interactions.slash_command(name="youtube",description="download video from youtube to server")
-@interactions.slash_option(
-    name='url',
-    opt_type=interactions.OptionType.STRING,
-    required=True,
-    description='url target'
-)
-async def youtube(ctx: interactions.SlashContext, url:str):
-    print(f'{ctx.author.id} requested {url}')
-    # check that user is authorized
-    if str(ctx.author.id) not in authorized_users:
-        if ctx.author.id == 127831327012683776:
-            await ctx.author.send('potato stop')
-        await ctx.author.send('you are not authorized to use this command. message my owner to be added.')
-        return
-
-    loop = asyncio.get_running_loop()
-    cancel_event = threading.Event()
-    hook = create_hook(ctx, loop, cancel_event)
-    job = {
-        'requester_id': str(ctx.author.id),
-        'request_url': url,
-        'cancel_event': cancel_event,
-    }
-    existing_job = claim_active_job(job)
-    if existing_job:
-        await ctx.author.send(
-            f'already downloading for <@{existing_job["requester_id"]}>. '
-            'single-job mode is enabled right now; try again after it finishes.'
-        )
-        return
-
-    # use api_to_cli and paste cli options to get the output you need
-    yoptions = {
-        'format':'bestvideo[ext=mp4]+bestaudio[ext=m4a]/best[ext=mp4]/best',
-        'fragment_tries': 10,
-        'restrictfilenames':True,
-        'paths': {'home':'/downloads'},
-        'retries':10,
-        'writeinfojson':False,
-        'allow_playlist_files':True,
-        'noplaylist':True,
-        'download_archive':'/config/archive.txt',
-        'progress_hooks':[hook],
-        'outtmpl': '%(uploader)s/%(playlist_title)s/%(playlist_index)s%(playlist_index& - )s%(title)s.%(ext)s',
-        'outtmpl_na_placeholder':'',
-    }
-    await ctx.channel.send(f'Downloading from <{url}>. Status updates via DM. Single-job mode is enabled.')
-
-    try:
-        await asyncio.to_thread(download_video, url, yoptions)
-    except yt_dlp.utils.DownloadCancelled as exc:
-        print(f'download canceled: {exc}')
-        await ctx.author.send(f'download canceled: {exc}')
-    except yt_dlp.utils.DownloadError as exc:
-        print(f'download failed: {exc}')
-        await ctx.author.send(f'download failed: {exc}')
-    except Exception as exc:
-        print(f'unexpected download failure: {exc}')
-        await ctx.author.send(f'unexpected download failure: {exc}')
-    else:
-        await ctx.author.send(f'download complete for <{url}>')
-    finally:
-        clear_active_job(job)
 
 
-@interactions.slash_command(name="interrupt",description="cancel current job")
+if __name__ == "__main__":
-@interactions.check(interactions.is_owner())
+    main()
-async def _interrupt(ctx):
-    job = get_active_job()
-    if not job:
-        await ctx.author.send('no active download to interrupt')
-        return
-
-    job['cancel_event'].set()
-    print(f'interrupt requested for {job["request_url"]}')
-    await ctx.author.send(
-        f'interrupt requested for <{job["request_url"]}>; '
-        'cancellation is coarse and will stop on the next yt-dlp progress update'
-    )
-    
-@interactions.slash_command(name="adduser",description="authorize target user")
-@interactions.slash_option(
-    name="user",
-    opt_type=interactions.OptionType.USER,
-    required=True,
-    description='enable this bot for target user',
-)
-@interactions.check(interactions.is_owner())
-async def _adduser(ctx: interactions.SlashContext, user:interactions.OptionType.USER):
-    user_id = str(user.id)
-    if user_id not in authorized_users:
-        authorized_users.append(user_id)
-        save_authorized_users(authorized_users)
-        print(f'authorized {user_id}')
-        await ctx.author.send(f'authorized {user.mention}')
-    else:
-        await ctx.author.send(f'{user.mention} is already authorized')
-
-@interactions.slash_command(name="removeuser",description="deauthorize target user")
-@interactions.slash_option(
-    name="user",
-    opt_type=interactions.OptionType.USER,
-    required=True,
-    description='disable this bot for target user',
-)
-@interactions.check(interactions.is_owner())
-async def _removeuser(ctx: interactions.SlashContext, user:interactions.OptionType.USER):
-    user_id = str(user.id)
-    if user_id in authorized_users:
-        authorized_users.remove(user_id)
-        save_authorized_users(authorized_users)
-        print(f'deauthorized {user_id}')
-        await ctx.author.send(f'deauthorized {user.mention}')
-    else:
-        await ctx.author.send(f'{user.mention} is not currently authorized')
-
-api_token = getenv('api_token')
-if not api_token:
-    raise ValueError('API token not set. Retrieve from your Discord bot.')
-bot.start(api_token)

youdis/__init__.py

@@ -0,0 +1 @@
+"""Youdis v2 backend package."""

youdis/adapters/__init__.py

@@ -0,0 +1 @@
+"""Frontend adapters for the youdis backend."""

youdis/adapters/discord.py

@@ -0,0 +1,224 @@
+"""Discord adapter for interacting with FastAPI backend worker."""
+
+import asyncio
+from os import getenv
+
+import aiohttp
+import interactions
+
+from ..env import load_project_dotenv
+
+
+load_project_dotenv()
+
+
+BACKEND_URL = getenv("YOUDIS_BACKEND_URL", "http://127.0.0.1:8000").rstrip("/")
+POLL_INTERVAL_SECONDS = float(getenv("YOUDIS_POLL_INTERVAL_SECONDS", "2"))
+DEFAULT_SCOPE = int(getenv("DISCORD_BOT_SCOPE", "2147491904"))
+
+
+bot = interactions.Client(
+    intents=interactions.Intents.DEFAULT,
+    default_scope=DEFAULT_SCOPE,
+)
+http_session: aiohttp.ClientSession | None = None
+poll_tasks: dict[str, asyncio.Task] = {}
+
+
+def backend_url(path: str) -> str:
+    return f"{BACKEND_URL}{path}"
+
+
+async def get_session() -> aiohttp.ClientSession:
+    global http_session
+    if http_session is None or http_session.closed:
+        http_session = aiohttp.ClientSession()
+    return http_session
+
+
+async def request_json(method: str, path: str, **kwargs):
+    session = await get_session()
+    async with session.request(method, backend_url(path), **kwargs) as response:
+        data = await response.json()
+        return response.status, data
+
+
+def format_status_message(job: dict) -> str:
+    state = job.get("state")
+    phase = job.get("phase")
+    disposition = job.get("disposition")
+    message = job.get("message")
+    result_path = job.get("result_path")
+
+    parts = [f"state={state}"]
+    if phase:
+        parts.append(f"phase={phase}")
+    if disposition:
+        parts.append(f"disposition={disposition}")
+    if message:
+        parts.append(message)
+    if result_path:
+        parts.append(f"path={result_path}")
+    return " | ".join(parts)
+
+
+async def dm(ctx: interactions.SlashContext, message: str) -> None:
+    await ctx.author.send(message)
+
+
+async def respond(ctx: interactions.SlashContext, message: str) -> None:
+    if ctx.channel is not None:
+        await ctx.channel.send(message)
+        return
+    await dm(ctx, message)
+
+
+async def poll_job_updates(ctx: interactions.SlashContext, job_id: str) -> None:
+    last_sent = None
+    try:
+        while True:
+            status_code, payload = await request_json("GET", "/jobs/current")
+            if status_code != 200:
+                await dm(ctx, f"backend status check failed: HTTP {status_code}")
+                return
+
+            job = payload.get("job")
+            if not job:
+                await dm(ctx, f"job {job_id} is no longer visible from the backend")
+                return
+
+            if job.get("job_id") != job_id:
+                await dm(ctx, f"job {job_id} is no longer the current backend job")
+                return
+
+            summary = format_status_message(job)
+            if summary != last_sent:
+                await dm(ctx, summary)
+                last_sent = summary
+
+            if job.get("state") in {"completed", "failed", "cancelled"}:
+                return
+
+            await asyncio.sleep(POLL_INTERVAL_SECONDS)
+    except asyncio.CancelledError:
+        raise
+    except aiohttp.ClientError as exc:
+        await dm(ctx, f"backend poll failed: {exc}")
+    finally:
+        poll_tasks.pop(job_id, None)
+
+
+def ensure_poll_task(ctx: interactions.SlashContext, job_id: str) -> None:
+    existing = poll_tasks.get(job_id)
+    if existing and not existing.done():
+        return
+    poll_tasks[job_id] = asyncio.create_task(poll_job_updates(ctx, job_id))
+
+@bot.listen()
+async def on_startup():
+    await get_session()
+    print(f"discord adapter configured for backend {BACKEND_URL}")
+
+@bot.listen()
+async def on_shutdown():
+    global http_session
+    for task in list(poll_tasks.values()):
+        task.cancel()
+    poll_tasks.clear()
+    if http_session is not None and not http_session.closed:
+        await http_session.close()
+    http_session = None
+
+
+@interactions.slash_command(name="youtube", description="submit a youtube download to the backend")
+@interactions.slash_option(
+    name="url",
+    opt_type=interactions.OptionType.STRING,
+    required=True,
+    description="url target",
+)
+async def youtube(ctx: interactions.SlashContext, url: str):
+    payload = {
+        "url": url,
+        "requester_id": str(ctx.author.id),
+        "requester_name": ctx.author.username,
+        "origin": f"discord:{ctx.guild_id or 'dm'}:{ctx.channel_id}",
+    }
+
+    try:
+        status_code, job = await request_json("POST", "/jobs", json=payload)
+    except aiohttp.ClientError as exc:
+        await dm(ctx, f"backend request failed: {exc}")
+        return
+
+    if status_code != 200:
+        await dm(ctx, f"backend request failed: HTTP {status_code}")
+        return
+
+    state = job.get("state")
+    job_id = job.get("job_id", "unknown")
+    if state == "busy":
+        await respond(ctx, "Backend is busy with another job. Details via DM.")
+        await dm(ctx, f"busy: {job.get('message')}")
+        return
+
+    if state != "accepted":
+        await respond(ctx, "Backend rejected the request. Details via DM.")
+        await dm(ctx, format_status_message(job))
+        return
+
+    await respond(ctx, f"Submitted <{url}> to the backend. Status updates via DM.")
+    await dm(ctx, f"accepted job {job_id} for <{url}>")
+    ensure_poll_task(ctx, job_id)
+
+
+@interactions.slash_command(name="interrupt", description="cancel the current backend job")
+@interactions.check(interactions.is_owner())
+async def interrupt(ctx: interactions.SlashContext):
+    try:
+        status_code, payload = await request_json("POST", "/jobs/current/cancel")
+    except aiohttp.ClientError as exc:
+        await dm(ctx, f"backend cancel failed: {exc}")
+        return
+
+    if status_code == 404:
+        await dm(ctx, "no active backend job to interrupt")
+        return
+
+    if status_code != 200:
+        await dm(ctx, f"backend cancel failed: HTTP {status_code}")
+        return
+
+    await dm(ctx, format_status_message(payload))
+
+
+@interactions.slash_command(name="status", description="show the current backend job status")
+async def status(ctx: interactions.SlashContext):
+    try:
+        status_code, payload = await request_json("GET", "/jobs/current")
+    except aiohttp.ClientError as exc:
+        await dm(ctx, f"backend status failed: {exc}")
+        return
+
+    if status_code != 200:
+        await dm(ctx, f"backend status failed: HTTP {status_code}")
+        return
+
+    job = payload.get("job")
+    if not job:
+        await dm(ctx, "backend has no active or recent job")
+        return
+
+    active = payload.get("active")
+    prefix = "active" if active else "last"
+    await dm(ctx, f"{prefix} job: {format_status_message(job)}")
+
+
+def main() -> None:
+    api_token = getenv("DISCORD_BOT_TOKEN")
+    if not api_token:
+        raise ValueError("API token not set. Retrieve from your Discord bot.")
+    bot.add_command(youtube)
+    bot.add_command(status)
+    bot.add_command(interrupt)
+    bot.start(api_token)

youdis/env.py

@@ -0,0 +1,8 @@
+from pathlib import Path
+
+from dotenv import load_dotenv
+
+
+def load_project_dotenv() -> None:
+    repo_root = Path(__file__).resolve().parent.parent
+    load_dotenv(repo_root / ".env", override=False)

youdis/main.py

@@ -0,0 +1,311 @@
+"""FastAPI backend worker managing yt-dlp subprocess jobs and exposing job state."""
+
+import asyncio
+from asyncio.subprocess import PIPE, STDOUT
+from collections import deque
+from dataclasses import dataclass, field
+from datetime import datetime
+from os import getenv
+from pathlib import Path
+import tempfile
+from uuid import uuid4
+
+from fastapi import FastAPI, HTTPException
+
+from .env import load_project_dotenv
+from .models import CurrentJobResponse, HealthResponse, JobRequest, JobStatus, VersionResponse
+
+
+load_project_dotenv()
+
+
+REPO_ROOT = Path(__file__).resolve().parent.parent
+DEFAULT_CONFIG = REPO_ROOT / "default-yt-dlp.conf"
+VERSION_FILE = REPO_ROOT / "youdis-version.txt"
+YTDLP_EXECUTABLE = getenv("YOUDIS_YTDLP_EXECUTABLE", "yt-dlp")
+PREFERRED_CONFIG_ROOT = Path(getenv("YOUDIS_CONFIG_DIR", "/config"))
+PREFERRED_DOWNLOAD_ROOT = Path(getenv("YOUDIS_DOWNLOAD_DIR", "/downloads"))
+LOCAL_RUNTIME_ROOT = REPO_ROOT / ".runtime"
+FALLBACK_CONFIG_ROOT = LOCAL_RUNTIME_ROOT / "config"
+FALLBACK_DOWNLOAD_ROOT = LOCAL_RUNTIME_ROOT / "downloads"
+OUTPUT_TEMPLATE = "%(uploader)s/%(playlist_title)s/%(playlist_index)s%(playlist_index& - )s%(title)s.%(ext)s"
+
+
+@dataclass
+class ManagedJob:
+    status: JobStatus
+    process: asyncio.subprocess.Process | None = None
+    task: asyncio.Task | None = None
+    cancel_requested: bool = False
+    output_lines: deque[str] = field(default_factory=lambda: deque(maxlen=25))
+
+
+app = FastAPI(title="youdis", version="2")
+job_lock = asyncio.Lock()
+active_job: ManagedJob | None = None
+last_job: JobStatus | None = None
+
+
+def now_utc() -> datetime:
+    return datetime.now()
+
+
+def read_version() -> str:
+    if VERSION_FILE.exists():
+        return VERSION_FILE.read_text().strip()
+    return "unknown"
+
+
+def ensure_writable_directory(preferred: Path, fallback: Path) -> Path:
+    for candidate in (preferred, fallback):
+        try:
+            candidate.mkdir(parents=True, exist_ok=True)
+            with tempfile.NamedTemporaryFile(dir=candidate, prefix=".youdis-write-", delete=True):
+                pass
+            return candidate
+        except OSError:
+            continue
+    raise OSError(f"no writable runtime directory available for {preferred} or {fallback}")
+
+
+def resolve_runtime_paths() -> tuple[Path, Path]:
+    config_root = ensure_writable_directory(PREFERRED_CONFIG_ROOT, FALLBACK_CONFIG_ROOT)
+    download_root = ensure_writable_directory(PREFERRED_DOWNLOAD_ROOT, FALLBACK_DOWNLOAD_ROOT)
+    return config_root, download_root
+
+
+def build_ytdlp_command(request: JobRequest, config_root: Path, download_root: Path) -> list[str]:
+    return [
+        YTDLP_EXECUTABLE,
+        "--config-locations",
+        str(DEFAULT_CONFIG),
+        "--download-archive",
+        str(config_root / "archive.txt"),
+        "--output",
+        str(download_root / OUTPUT_TEMPLATE),
+        request.url,
+    ]
+
+
+def clone_status(status: JobStatus) -> JobStatus:
+    return JobStatus(**status.model_dump())
+
+
+def update_status(job: ManagedJob, **changes: object) -> None:
+    for key, value in changes.items():
+        setattr(job.status, key, value)
+    job.status.updated_at = now_utc()
+
+
+def classify_output_line(job: ManagedJob, line: str) -> None:
+    if not line:
+        return
+
+    job.output_lines.append(line)
+    message = line.strip()
+    if not message:
+        return
+
+    lowered = message.lower()
+    if "has already been recorded in the archive" in lowered:
+        update_status(
+            job,
+            disposition="archive_hit",
+            phase="downloading",
+            message="already in archive",
+        )
+        return
+
+    if "[download]" in lowered:
+        update_status(job, phase="downloading", message=message)
+        if "destination:" in lowered:
+            result_path = message.split(":", 1)[1].strip()
+            update_status(job, result_path=result_path)
+        return
+
+    if "merging formats into" in lowered:
+        result_path = message.split("into", 1)[1].strip().strip('"')
+        update_status(job, phase="postprocessing", message=message, result_path=result_path)
+        return
+
+    update_status(job, message=message)
+
+
+async def finalize_job(job: ManagedJob, returncode: int) -> None:
+    disposition = job.status.disposition
+    if job.cancel_requested:
+        state = "cancelled"
+        message = "cancelled"
+    elif returncode == 0 and disposition == "archive_hit":
+        state = "completed"
+        message = "already in archive"
+    elif returncode == 0:
+        state = "completed"
+        message = job.status.message or "completed"
+    else:
+        state = "failed"
+        message = job.status.message or f"yt-dlp exited with code {returncode}"
+
+    update_status(job, state=state, phase=None, returncode=returncode, message=message)
+
+    global active_job, last_job
+    async with job_lock:
+        if active_job is job:
+            active_job = None
+        last_job = clone_status(job.status)
+
+
+async def run_job(job: ManagedJob, request: JobRequest) -> None:
+    update_status(
+        job,
+        state="running",
+        phase="starting",
+        message="starting yt-dlp",
+    )
+
+    try:
+        if not DEFAULT_CONFIG.exists():
+            update_status(
+                job,
+                state="failed",
+                phase=None,
+                message=f"default config not found: {DEFAULT_CONFIG}",
+                returncode=78,
+            )
+            await finalize_job(job, 78)
+            return
+
+        config_root, download_root = resolve_runtime_paths()
+        command = build_ytdlp_command(request, config_root, download_root)
+        update_status(
+            job,
+            command=command,
+            archive_path=str(config_root / "archive.txt"),
+            result_path=str(download_root),
+        )
+
+        process = await asyncio.create_subprocess_exec(
+            *command,
+            stdout=PIPE,
+            stderr=STDOUT,
+        )
+    except FileNotFoundError:
+        update_status(
+            job,
+            state="failed",
+            phase=None,
+            message="yt-dlp executable not found",
+            returncode=127,
+        )
+        await finalize_job(job, 127)
+        return
+    except OSError as exc:
+        update_status(
+            job,
+            state="failed",
+            phase=None,
+            message=f"runtime path setup failed: {exc}",
+            returncode=73,
+        )
+        await finalize_job(job, 73)
+        return
+
+    try:
+        job.process = process
+        update_status(job, phase="running", message="yt-dlp running")
+
+        assert process.stdout is not None
+        while True:
+            line = await process.stdout.readline()
+            if not line:
+                break
+            classify_output_line(job, line.decode(errors="replace").strip())
+
+        returncode = await process.wait()
+        await finalize_job(job, returncode)
+    except Exception as exc:
+        update_status(
+            job,
+            state="failed",
+            phase=None,
+            message=f"backend runner error: {exc}",
+            returncode=1,
+        )
+        await finalize_job(job, 1)
+
+
+async def create_job(request: JobRequest) -> JobStatus:
+    global active_job
+    async with job_lock:
+        if active_job is not None:
+            busy_job = active_job.status
+            return JobStatus(
+                job_id=busy_job.job_id,
+                state="busy",
+                url=request.url,
+                message=f"busy with {busy_job.url}",
+                requester_id=request.requester_id,
+                requester_name=request.requester_name,
+                origin=request.origin,
+            )
+
+        status = JobStatus(
+            job_id=str(uuid4()),
+            state="accepted",
+            url=request.url,
+            message="accepted",
+            phase="queued",
+            requester_id=request.requester_id,
+            requester_name=request.requester_name,
+            origin=request.origin,
+        )
+        managed_job = ManagedJob(status=status)
+        managed_job.task = asyncio.create_task(run_job(managed_job, request))
+        active_job = managed_job
+        return clone_status(status)
+
+
+@app.get("/health", response_model=HealthResponse)
+async def health() -> HealthResponse:
+    return HealthResponse(status="ok")
+
+
+@app.get("/version", response_model=VersionResponse)
+async def version() -> VersionResponse:
+    return VersionResponse(
+        version=read_version(),
+        active_job=active_job is not None,
+        ytdlp_executable=YTDLP_EXECUTABLE,
+    )
+
+
+@app.get("/jobs/current", response_model=CurrentJobResponse)
+async def current_job() -> CurrentJobResponse:
+    async with job_lock:
+        if active_job is not None:
+            return CurrentJobResponse(active=True, job=clone_status(active_job.status))
+        if last_job is not None:
+            return CurrentJobResponse(active=False, job=clone_status(last_job))
+    return CurrentJobResponse(active=False, job=None)
+
+
+@app.post("/jobs", response_model=JobStatus)
+async def submit_job(request: JobRequest) -> JobStatus:
+    return await create_job(request)
+
+
+@app.post("/jobs/current/cancel", response_model=JobStatus)
+async def cancel_current_job() -> JobStatus:
+    async with job_lock:
+        if active_job is None:
+            raise HTTPException(status_code=404, detail="no active job")
+        job = active_job
+        if job.process is None:
+            update_status(job, message="cancel requested before yt-dlp started")
+            job.cancel_requested = True
+            return clone_status(job.status)
+
+        job.cancel_requested = True
+        update_status(job, message="cancel requested", phase="running")
+        job.process.terminate()
+        return clone_status(job.status)

youdis/models.py

@@ -0,0 +1,48 @@
+from datetime import datetime
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+
+JobState = Literal["accepted", "busy", "running", "completed", "failed", "cancelled"]
+
+
+class JobRequest(BaseModel):
+    url: str
+    requester_id: str | None = None
+    requester_name: str | None = None
+    origin: str | None = None
+    requested_at: datetime | None = None
+
+
+class JobStatus(BaseModel):
+    job_id: str
+    state: JobState
+    url: str
+    message: str | None = None
+    phase: str | None = None
+    disposition: str | None = None
+    requester_id: str | None = None
+    requester_name: str | None = None
+    origin: str | None = None
+    result_path: str | None = None
+    archive_path: str | None = None
+    command: list[str] = Field(default_factory=list)
+    returncode: int | None = None
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+    updated_at: datetime = Field(default_factory=datetime.utcnow)
+
+
+class CurrentJobResponse(BaseModel):
+    active: bool
+    job: JobStatus | None = None
+
+
+class HealthResponse(BaseModel):
+    status: Literal["ok"]
+
+
+class VersionResponse(BaseModel):
+    version: str
+    active_job: bool
+    ytdlp_executable: str