FreeTLab
f368bcc777
Favoritos now renders non-empty custom groups as grupo:<id> sub-folders (hidden when empty) with ungrouped stations left as direct leaves, reusing the existing hijos() path so the zero-groups case stays byte-identical to today's flat list.
91 lines
5.8 KiB
Markdown
91 lines
5.8 KiB
Markdown
# Delta for android-auto-media
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## ADDED Requirements
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### Requirement: Favorite Group Sub-Folders
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The Android Auto browse tree MUST expose favorite groups (`GrupoFavoritos`, as already modeled by `Emisora.grupoFavoritosId` and surfaced by `EstadoRadio.gruposFavoritos`) as browsable, non-playable sub-folders reachable from the existing `Favoritos` folder, without altering the 3 root folders (`Favoritos`, `Todas las emisoras`, `Mis emisoras`).
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#### Scenario: Car requests the Favoritos folder and groups exist
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- GIVEN the user has one or more favorite groups with at least one member station each
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- WHEN `getChildren` is called with the `Favoritos` folder id
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- THEN it returns one non-playable folder `MediaItem` per surfaced group, in addition to (or instead of, per the design's structural decision) any ungrouped favorite stations
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- AND each group folder's id follows a browsable `grupo:<id>` scheme distinct from the `emisora:<uuid>` playable-item scheme
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#### Scenario: Car requests a group folder's stations
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- GIVEN a favorite group folder with id `grupo:<id>` was returned under `Favoritos`
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- WHEN `getChildren` is called with that `grupo:<id>` folder id
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- THEN it returns the playable `MediaItem`s for exactly the stations whose `Emisora.grupoFavoritosId` matches `<id>`
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- AND those items are sorted and capped using the same ordering and item-count rules already applied to the other folders (`ordenarEmisoras`, 50-item cap)
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- AND selecting one of those items plays the corresponding station via the existing `emisora:<uuid>` playback path, unchanged
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#### Scenario: Car requests an unknown or stale group id
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- GIVEN a `grupo:<id>` id that does not match any group known to the current snapshot
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- WHEN `getChildren` is called with that id
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- THEN it returns an empty list, not an error
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### Requirement: Empty Favorite Group Handling
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The system MUST produce a browsable tree that never presents a user-selectable folder promising content it cannot deliver: for any favorite group with zero member stations, the tree MUST either omit that group's folder from `Favoritos`'s children, or include it and return an empty (not erroring) child list when browsed. The specific choice between omitting empty-group folders and showing-but-empty, and any related folder-count/flat-vs-nested structural decision for `Favoritos`, is deferred to `sdd-design`; whichever mechanism design selects MUST satisfy both scenarios below.
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#### Scenario: Empty group folder is browsed (if shown)
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- GIVEN a favorite group has zero member stations and the design's chosen mechanism surfaces it as a folder under `Favoritos`
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- WHEN `getChildren` is called with that group's `grupo:<id>`
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- THEN it returns an empty list, not an error
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#### Scenario: No user-facing dead end
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- GIVEN the full set of favorite groups, including any empty ones
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- WHEN the `Favoritos` folder is browsed and then each of its returned children is browsed
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- THEN no returned folder child ever throws, hangs, or surfaces a driver-facing error state
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- AND the car head unit's total folder/item count presented under `Favoritos` remains within the driver-distraction-safe bounds design establishes
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## MODIFIED Requirements
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### Requirement: Browsable Media Tree
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`getChildren` MUST return a browsable tree rooted at `AudioService.browsableRootId`, organized into non-playable folders (Favoritos, Todas las emisoras, Mis emisoras) containing playable station items. Playable station items SHOULD carry an audio-quality subtitle when known. The `Favoritos` folder additionally MAY contain non-playable favorite-group sub-folders (see "Favorite Group Sub-Folders"); `Todas las emisoras` and `Mis emisoras` remain flat, unchanged by this capability.
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(Previously: `Favoritos` was a flat folder of playable station items only, with no sub-folder nesting.)
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#### Scenario: Car requests the root
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- GIVEN the car head unit connects and requests the root (`AudioService.browsableRootId`)
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- WHEN `getChildren` is called with the root id
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- THEN it returns three folder `MediaItem`s (Favoritos, Todas las emisoras, Mis emisoras), each with `playable: false`
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#### Scenario: Car requests a folder with no stations
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- GIVEN the user has zero favorite stations
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- WHEN `getChildren` is called with the Favoritos folder id
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- THEN it returns an empty list, not an error
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#### Scenario: Browse requested before app state is loaded
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- GIVEN the audio handler starts cold and station/favorites Provider state has not finished loading
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- WHEN `getChildren` is called (root or any folder)
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- THEN it returns a valid, possibly empty, list without throwing and without blocking or crashing the service
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#### Scenario: Station has known codec and bitrate
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- GIVEN a station's `Emisora.codec` and `Emisora.bitrate` are both known (non-null)
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- WHEN it is mapped to a playable `MediaItem`
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- THEN `displaySubtitle` SHALL contain a human-readable quality hint combining bitrate and codec (e.g. "128 kbps · MP3")
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#### Scenario: Station has unknown codec or bitrate
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- GIVEN a station's `Emisora.codec` or `Emisora.bitrate` (or both) is null/unknown
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- WHEN it is mapped to a playable `MediaItem`
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- THEN `displaySubtitle` SHALL omit the quality hint gracefully (no subtitle, or a subtitle with no quality fragment)
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- AND the subtitle MUST NOT render literal placeholder text such as "null kbps" or "null · null"
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#### Scenario: Ungrouped station appears exactly as before (regression guard)
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- GIVEN a station's `Emisora.grupoFavoritosId` equals `GrupoFavoritos.sinAsignarId` (`'sin_asignar'`, the default when no group is assigned)
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- WHEN the `Favoritos`, `Todas las emisoras`, or `Mis emisoras` folders are browsed
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- THEN that station appears as a playable `emisora:<uuid>` item in exactly the same folder(s), position (subject to existing sort rules), title, art, and subtitle as it did before favorite-group folders were introduced
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- AND its presence and shape are unaffected by the existence, emptiness, or content of any favorite group
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