Files
amethyst/commonsUI/ARCHITECTURE.md
T
Claude 289702b4b0 refactor(avm): move AccountViewModel and its group into commonsUI and commons
The 127 files reachable from AccountViewModel leave the app, split by
what they import:
- commonsUI/commonMain (33 files): AccountViewModel,
  AccountFeedContentStates, the payment stack (Zap/V4V handlers,
  MeltProcessor, LightningInvoiceResolver, HttpStatusMessages,
  NwcResponseMessages), TopNavFilterState, NotificationSummaryState, the
  account filter assemblers that hold the feed states, the nest
  assemblers and bridges, CallSessionBridge, ReloadMintViewModel. They
  need compose-resources strings, Vico or commonsUI symbols.
- commons/commonMain (94 files): the feed filters, the chat, relay-group,
  concord and hashtag assemblers, EventSync, the Clink payer, the card
  feed state, the chat-room read markers.

Packages are renamed on the way: ui.screen.loggedIn -> commons.viewmodels,
ui.screen.loggedIn.X -> commons.X, ui.screen and ui.dal -> commons.feeds,
ui.nwc -> commons.service.nwc, service.relayClient.X ->
commons.relayClient.X, service.X -> commons.service.X. Every reference in
the app, desktop and tests is repointed.

commonMain needed only kotlinx.coroutines.IO and kotlin.concurrent.Volatile
imports, toLongValue() on one BigDecimal, and three cross-module smart
casts read into locals. commonsUI gains Vico (Apache-2.0, already an app
dependency, multiplatform for all commonsUI targets) and
kotlinx-serialization-json. The resolver test moves to commonsUI's
jvmTest with the code it tests.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S7FuNBSKiyVecARSoE4B9P
2026-09-28 15:15:21 +00:00

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4.6 KiB
Markdown

# `commonsUI` — the Compose half of the shared layer
`commonsUI` holds every piece of shared code that needs **Compose UI** and is
therefore useless to the headless `cli`:
- composables (`ui/<area>`, `<feature>/ui` — e.g. `nip64Chess/ui`,
`profile/ui` — and the historical flat `audio` renderers),
- `ImageVector` icons (`icons`, `hashtags`, `robohash`) and the icon fonts,
- theme, layouts, markdown rendering (`ui/markdown`, jvmAndroid),
- Coil (`service/image`: `CoilImageBridge` + BlurHash/ThumbHash/Base64/Blossom
fetchers),
- the `composeResources` tree (translated strings, fonts, the napplet shell +
shim files) and the generated `com.vitorpamplona.amethyst.commons.resources.Res`,
- the `@Composable` relay-client entry points (`observeUser*`,
`*FilterAssemblerSubscription`, `KeyDataSourceSubscription`),
- state holders that carry a `foundation`/`ui` type (`LevelFeedViewModel` with
its `LazyListState`, `ChatNewMessageState` with `TextFieldValue`,
`EmojiSuggestionState` with `TextFieldState`).
Its end state is **the whole app UI**: every screen, the navigation host and the
navigation chrome for every window size (bottom bar, rail, permanent drawer), with
`amethyst` and a new JVM `desktopApp` as thin shims around it. Screens still in
`amethyst/` are waiting on their own app-only helpers and the app root, not staying
there by design. `AccountViewModel` lives here (`commons.viewmodels`) rather than in
`commons` because it toasts through compose-resources strings; it reaches the
platform through `AccountViewModelHost`. See `commons/plans/2026-09-27-one-ui-android-desktop.md`.
It depends on `:commons` (and `:quartz`) as **`api`**, so a consumer that adds
`:commonsUI` sees the headless layer transitively. `amethyst`, `desktopApp`,
`nappletHost` and `benchmark` depend on it; `cli`, `geode`, `marmotBench`
must never.
## Same packages as `commons`
Every file keeps its `com.vitorpamplona.amethyst.commons.*` package. The split
is a **build-graph boundary, not a package rename**: nothing in the apps had to
change an import, and a file can move between the two modules with a `git mv`.
The rule for which module a file lives in is mechanical:
> imports `androidx.compose.ui` / `foundation` / `material3` / `animation`,
> Coil, `org.jetbrains.compose.resources`, `Res`, `org.jetbrains.skia`, or
> declares a `@Composable` → **`commonsUI`**. Otherwise → **`commons`**.
The only cross-module gotcha is `internal`: a `commonsUI` file cannot see an
`internal` declaration in `commons`. Make it public (or move the caller).
The full package taxonomy — including which packages are "mixed" (logic in
`commons`, composables here, same package name) — is the table in
`commons/ARCHITECTURE.md` §2. Read that first; this file only documents what
is specific to the UI module.
## Source sets
| Source set | For |
|---------------|-----|
| `commonMain` | Composables, icons, theme, Coil fetchers, `composeResources`. Gated by `verifyKmpPurity` like `commons`. |
| `jvmAndroid` | Markdown renderer (`ui/markdown`), Coil-OkHttp + Blossom read-auth fetcher, the `viewModel()` helper, and the avatar/image engine (`ui/components/RobohashAsyncImage.kt`: `RobohashFallbackAsyncImage`, `GifProfilePicture`) behind the `UserAvatar` `AvatarImage` actual. For a user avatar call the commonMain `UserAvatar`; don't add another avatar composable. |
| `jvmMain` | Desktop Coil bridge (`CoilImageBridge.jvm.kt`), a no-op `AnimatedImageAutoPlay` (Coil decodes only the first frame), `compose.desktop.currentOs`. `dependsOn(jvmAndroid)` + `skikoMain`. |
| `androidMain` | Android Coil bridge, the `AnimatedImageAutoPlay` actual that starts/stops GIF/AVIF drawables. `dependsOn(jvmAndroid)`. |
| `skikoMain` | `org.jetbrains.skia` pixel helpers shared by desktop JVM + iOS (`SkiaBitmapConverter`). |
| `iosMain` | iOS Coil bridge, a plain `AsyncImage` `AvatarImage` actual. Compile-only spike today. |
## Tooling that points here
- Icon fonts: `tools/material-symbols-subset/subset.sh` and
`tools/icon-font/build_icon_font.py` read `icons/` and write
`composeResources/font/` in this module (see root `.claude/CLAUDE.md`, "Icons").
- Translations: `crowdin.yml` and `tools/strings-migrate/` target
`commonsUI/src/commonMain/composeResources/`. This is where **every new
user-visible string** goes, Android-only screens included; the app's own
`res/values/strings.xml` holds only the synchronous-platform tier (see root
`.claude/CLAUDE.md`, "Strings").
- CI: `.github/workflows/build.yml` runs `:commonsUI:jvmTest`,
`:commonsUI:verifyKmpPurity` and the iOS compile/test tasks next to the
`:commons` ones.