portal/README.md

# portal

A content-driven question engine: one Rust binary that turns a Git
repo of YAML into a live site — pages, forms, review desks, and state
machines, with a durable event-sourced record of every answer
underneath. The engine special-cases nothing: everything a site
serves is declared in its content repo, and the same build serves any
number of sites.

Point an instance at a content repo and that repo *is* the site:
pages, copy, state graphs, branding, and even the landing hero
(`site.yaml`: title, wordmark, and `hero: {kind: module, module:
hero.js}` — a JavaScript module the content repo ships, served
same-origin at `/site/<path>`, that portal mounts at parse time and
stops on navigation; the YES canvas and redoal's sine swings are both
content, not engine). Content
pushes hot-reload every running instance; instances differ only by
env vars. [uhhm.no](https://uhhm.no)
([uhhm/questions](https://project.uhhm.no/uhhm/questions)) and
[redoal.com](https://redoal.com)
([redoal/questions](https://project.uhhm.no/redoal/questions)) are
two faces of the same binary, deployed from the same release
artifact.

It composes with the surrounding stack rather than bundling it: Gitea
hosts and serves the content, NATS JetStream stores events and
projections, Kanidm provides identity, and anything downstream
(automations, newsletters, onboarding) subscribes to the answer
stream.

## What the engine provides

- **Content-driven pages** (`src/content.rs`, `src/app.rs`): YAML
  loaded from Gitea at boot and hot-swapped on a NATS reload signal;
  a bad push keeps the last-good content serving. The `questions/`
  tree IS the router — file paths become URLs, `_section.yaml`
  applies criteria to a whole directory, `[name].yaml` pages serve
  any `/dir/<value>` with the segment fed into resource keys, and
  `requires_chain` gates a page on verifiable answer provenance next
  to `qualifies`' Kanidm-group identity gate (see
  `docs/design/filesystem-routes.md`).
- **State machines as content** (`src/aggregates/`): `aggregates.yaml`
  declares each bucket's states and legal transitions; the engine
  replays a record's event history and refuses undeclared moves, with
  optimistic concurrency (CAS on the event log's sequence) against
  racing decisions. An empty history reseeds from the KV projection,
  so wiping the event stream strands nothing.
- **Durable events + projections** (`src/events/`, `src/answers.rs`):
  every submission and decision appends to a JetStream event log and
  projects into a NATS KV bucket pages read back; every one also
  publishes on `portal.answers.submitted` for automations (n8n) to
  react to.
- **Answer chains** (`src/chain.rs`): each submission hashes its
  parent(s), so a visitor's path through the questions is a verifiable
  lineage; `?chain=` links carry it, and self-service transitions
  (unsubscribe) authorize by holding one.
- **Live resources** (`src/resource.rs`): content can pull a KV
  bucket, Gitea starred/org repos/releases, or any public JSON URL
  (SSRF fail-closed), reshaped by a content-declared `jq` filter.
- **Input kinds as content**: a requirement's `type:` picks the
  widget — plain fields, a rich-text editor, or a `gesture` drawing
  canvas that can connect to a redoal relay so similar strokes echo
  between visitors live. Submitted values are arbitrary JSON; the
  engine records what the widget produced.
- **Review desks**: any Kv resource with `transitions` renders rows
  with per-state action buttons and one shared confirm per
  alternative — owners walk records through their graphs without
  bespoke UI per bucket.

## Binaries

- `portal` — the server (Leptos SSR + hydrate, Axum underneath).
- `question_lint` — headless content validation, shipped inside every
  release artifact so each content repo's CI lints with the exact
  portal version its instance runs; also works offline:
  `question_lint --path <dir>`.

## Development

```sh
cargo leptos build            # full app (server + wasm)
cargo test --features ssr     # engine tests
cargo build --features ssr --bin question_lint
```

Runtime configuration is env vars (see `src/main.rs`, and each
content repo's `.gitea/workflows/deploy.yml` for the values in
production): `NATS_URL`, `CONTENT_REPO`/`CONTENT_BRANCH`, Kanidm OIDC
(`KANIDM_URL`, `OAUTH2_CLIENT_*`), optional `GARAGE_*` for uploads,
`GITEA_API_TOKEN` for authenticated resource pulls,
`AUTOMATION_READ_TOKEN` for the automation KV read endpoint.

## Release and deploy

Portal doesn't deploy itself — it publishes versions, and each site
decides when to take one. The whole day-to-day surface is two
commands:

**Cut a release** (here):

```sh
cargo release patch        # or minor / major
```

That bumps `Cargo.toml`, tags `v<version>`, and pushes; CI
(`.gitea/workflows/publish.yml`) reacts to the tag, builds once, and
attaches `portal-v<version>.tar.gz` (`portal` + `question_lint` +
`site/`) to the Gitea release. Plain pushes to `main` only run the
tests (`test.yml`) — nothing reaches production from this repo.

**Roll it out** (in a content repo): edit one line in that repo's
`.gitea/workflows/deploy.yml` —

```yaml
env:
  PORTAL_RELEASE: v0.1.1   # <- bump, commit, push
```

Its CI downloads the pinned artifact, ships
`/srv/app/<instance>/releases/<tag>`, flips `current`, rewrites the
instance env from that repo's own Actions variables/secrets, restarts
`app@<instance>`, and refreshes the Caddy route. Every rollout is a
commit, so reverting a bad version is `git revert` + push. Sites
upgrade independently: uhhm.no (uhhm/questions → `app@uhhm-portal`,
:3010) and redoal.com (redoal/questions → `app@redoal-portal`,
:3020) can pin different versions.

Content changes never come through any of this — they hot-reload
live from the content repos over NATS.

**Add a site**: new content repo with a copy of an existing
`deploy.yml` (change `INSTANCE`, port, domains), Actions variables
(`KANIDM_URL`, `OAUTH2_CLIENT_ID`, `PUBLIC_URL`, `SITE_NAME`) and
secrets (`NATS_URL`, `OAUTH2_CLIENT_SECRET`,
`PORTAL_GITEA_API_TOKEN` — Gitea reserves the `GITEA_` prefix for
secret names), a Kanidm OAuth2 client, and DNS. `site.yaml` in the
content repo handles all branding; no portal changes needed.