iptvnator/docs/architecture/stalker-portal.md

Stalker Portal Architecture

This document describes the Stalker portal implementation in IPTVnator and where each feature is integrated.

Related Docs

• Stalker Portal EPG Architecture
• Playlist Backup/Restore Architecture
• Portal Detail Navigation
• Embedded Inline Playback
• Remote Control Architecture
• Download Manager
• Category Management
• Stalker Store API Baseline

Scope

Stalker support covers:

• Live TV (itv)
• Radio (radio)
• VOD (vod)
• Series (series)
• VOD-as-series flows (is_series=1 and embedded series[])
• Favorites and recently viewed collections
• Search
• External player playback (shared Xtream player infrastructure)
• Remote control for live ITV navigation

Routing Structure

Primary route tree lives in libs/portal/stalker/feature/src/lib/stalker-feature.routes.ts.

• /stalker/:id/vod (plus vod/:categoryId child)
• /stalker/:id/series (plus series/:categoryId child)
• /stalker/:id/itv
• /stalker/:id/radio
• /stalker/:id/favorites
• /stalker/:id/recent
• /stalker/:id/search
• /stalker/:id/actor/:personId
• /stalker/:id/downloads (shared DownloadsComponent from @iptvnator/portal/downloads/feature)

Runtime Architecture

1. Angular Stalker screens call methods/resources in StalkerStore.
2. StalkerStore builds request params based on selected content type and current view state.
3. Requests go through DataService.sendIpcEvent(STALKER_REQUEST, ...) or StalkerSessionService (full portal auth).
4. Electron main process handles STALKER_REQUEST in apps/electron-backend/src/app/events/stalker.events.ts.
5. Axios calls Stalker load.php API with required headers/cookies and returns the raw response.data to the renderer; normalization happens in the store feature slices.

Main UI Components

• CategoryContentViewComponent from @iptvnator/portal/catalog/feature (libs/portal/catalog/feature)
  • Shared category + content layout used by the vod and series routes (wired in stalker-feature.routes.ts via loadCategoryContentViewComponent)
• libs/portal/stalker/feature/src/lib/stalker-live-stream-layout/stalker-live-stream-layout.component.ts
  • ITV live playback, radio playback, channel/station navigation, EPG panel integration
• libs/ui/playback/src/lib/audio-player/audio-player.component.ts
  • Shared inline audio player used by M3U radio channels and Stalker radio stations
• libs/portal/stalker/feature/src/lib/stalker-series-view/stalker-series-view.component.ts
  • Season/episode UI for all Stalker series modes
• libs/portal/stalker/feature/src/lib/stalker-collection-route.component.ts
  • Favorites and recently-viewed collection views (mode = 'favorites' | 'recent' route data), rendering stalker-collection-detail.component.ts
• libs/portal/stalker/feature/src/lib/stalker-search/stalker-search.component.ts

Store and Data Flow

Stalker store is now feature-composed:

• Facade: libs/portal/stalker/data-access/src/lib/stalker.store.ts
• Feature slices: libs/portal/stalker/data-access/src/lib/stores/features/*
• Shared helpers: libs/portal/stalker/data-access/src/lib/*

Important store responsibilities:

• Selected content/category/item state
• Category and paginated content resources
• ITV channel list + pagination (full-list session cache when the portal supports it, legacy 14-per-page lazy loading otherwise)
• Radio category/station list + pagination
• Regular series seasons resource
• VOD-series (is_series=1) seasons + episodes resources
• Playback link creation (create_link flow)
• Favorites and recently viewed persistence helpers

Internal structure to preserve:

• stalker.store.ts stays as the thin facade that composes feature slices.
• Cross-slice contracts live in stores/stalker-store.contracts.ts so feature dependencies are declared instead of repeated unknown casts.
• Request execution is centralized in stores/utils/stalker-request.utils.ts for both authenticated full-portal calls and simple IPC-backed requests.
• Playback link resolution and Stalker collection persistence live in dedicated stores/utils/ helpers so player/favorites/recent slices stay focused on orchestration.
• Category/content resources stay internal to the store slices. Feature consumers should read getCategoryResource() and getPaginatedContent(), which now always return arrays, and pair them with isCategoryResourceFailed() / isPaginatedContentFailed() for explicit error handling.

Failure-handling rule:

• Failed category or content requests must degrade into empty/error UI state, not undefined collections or renderer exceptions. The workspace Stalker context panel and live layout rely on this guarantee.

Stalker Identity Policy

Full Stalker/Ministra portal authentication defaults to MAC-only identity. The import UI can capture optional serial number, device IDs, and signatures, but blank fields are not generated or forwarded to get_profile.

• User-provided sn, device_id, device_id2, signature, and signature2 values are trimmed, persisted under the canonical stalker* playlist fields, and reused for initial auth, token refresh, retry auth, normal API requests, and same-origin playback headers.
• Empty optional identity fields remain absent. IPTVnator must not generate a device ID from the MAC address or duplicate device_id2 from device_id1.
• The legacy default serial value BEDACD4569BAF is treated as absent at runtime so older blank imports do not keep sending a synthetic serial number.
• Playback headers use the same serial normalization, so the legacy default is not sent as SN or as a serial-derived __cfduid. MAC-only API and playback requests do not synthesize __cfduid; when a real serial is present, same-origin playback uses a canonical 32-character __cfduid protocol cookie.
• Generated MAG-like identity remains a future explicit setting. It must not be the default because strict portals can bind accounts to the first device fingerprint they receive.
• Stalker workspace routes must initialize StalkerStore from a playlist object with an explicit isFullStalkerPortal mode. If the active route metadata is a lightweight playlist record without that field, the route session must load the full playlist by id before category/content resources run. Stalker auth metadata is independent from M3U playlist EPG metadata and must not depend on M3U-specific EPG fields.

Live TV and Radio

The Stalker live route and radio route intentionally share StalkerLiveStreamLayoutComponent:

• itv uses type=itv&action=get_ordered_list, stores results in itvChannels, resolves playback through resolveItvPlayback(...), and keeps the EPG panel visible.
• ITV additionally loads the COMPLETE channel list once per portal session (see "Full ITV channel list cache" below), so category views and search are not limited to the lazily loaded 14-item pages.
• radio uses type=radio&action=get_ordered_list, stores results in radioChannels, resolves playback through resolveRadioPlayback(...), and renders AudioPlayerComponent instead of a video player.
• Radio hides the EPG panel and must not call Stalker EPG endpoints because radio stations do not have EPG data.
• Radio always uses the inline audio player. External player settings are ignored for Stalker radio, matching M3U radio behavior.
• Radio stations opened from favorites or recently viewed remain live collection items with radio: 'true'; the shared collection resolver uses create_link with type=radio, skips EPG loading, and renders the same AudioPlayerComponent layout instead of the Stalker VOD detail layout.
• Some Stalker portals do not expose radio categories. Radio category loading falls back to a synthetic PORTALS.ALL_RADIO category with category_id: '*' so the station list can still be loaded.

Full ITV Channel List Cache

Stalker portals paginate get_ordered_list with a server-side page size (typically 14 items), so lazy loading alone can never power a complete local search — this used to limit ITV search to whatever pages the user had scrolled through. StalkerItvCacheService (libs/portal/stalker/data-access/src/lib/stalker-itv-cache.service.ts) fixes this with a per-portal, in-memory session cache of the complete live channel list:

• Load strategy: first try the Ministra get_all_channels action (type=itv, returns ALL channels in one response — the same call STB clients use); if the portal does not implement it, crawl get_ordered_list pages (category=*, genre=*, concurrency 4, one retry per page, early stop on an empty page or a page that adds no new channel ids — some portals ignore p and repeat — 30k-channel hard cap) with progress reporting. The assembled list is de-duplicated by channel id (both strategies) so it never collides with the template's track item.id. The loading strategy itself is a stateless helper (stalker-itv-channel-loader.ts); the service owns state.
• Outcomes: a well-formed but unusable response marks the portal unsupported for the session (legacy paged flow stays in charge); a transient failure (network, or a page that failed both attempts) is retried later but throttled by a per-portal cooldown (ERROR_COOLDOWN_MS, 30s) so a deterministically-failing page can't trigger an unbounded re-crawl loop.
• Per-portal reactivity: the "cache ready / refreshed" trigger is a per-portal version signal (versionFor(playlist)), not one global counter, and the content resource reads it only for ITV. This is load-bearing: a global counter re-fired the resource for whatever was on screen (radio, another portal), and the legacy paged branch appends at pageIndex > 1, so an unrelated load completing duplicated the visible page (colliding track item.id → NG0955). The isCurrentRequest guard is scoped the same way.
• Integration: the getContentResource loader in with-stalker-content.feature.ts serves ITV categories from the cache when ready (local tv_genre_id filtering via filterItvChannelsByGenre, hasMoreChannels=false), and otherwise runs the legacy paged fetch while ensureLoaded() fills the cache in the background; the resource re-fires via the cacheVersion signal once the full list arrives.
• UI: StalkerLiveStreamLayoutComponent windows the rendered list (100-item chunks extended by the existing scroll handler) so multi-thousand channel lists do not blow up the DOM; the header count and search cover the whole category; a refresh button re-loads the list in place; a progress line shows crawl status.
• Loading state contract (important — regressions here strand the sidebar on a skeleton): in full-list mode the content loader serves the filtered list synchronously from the cache. The category-change reset effect therefore must NOT setItvChannels([]) while itvFullListActive() is true — it runs after the store resource and would clobber the freshly served list, leaving every category after the first stuck on a skeleton. The initial-loading skeleton (isInitialChannelsLoading) must key off an actual in-flight load (itvFullListLoading() or isPaginatedContentLoading()), not merely an empty channel list; an empty result once loading has settled is an empty category and renders PORTALS.NO_CHANNELS_IN_CATEGORY, not a spinner.
• Search: with the cache active, the header search spans the ENTIRE portal (all genres) — filtering the store's itvFullChannelList, not just the selected category — so searching "CNN" while a "Sports" genre is selected still finds it; clearing the term returns to the selected category. The workspace shell drops the degraded-loaded-only / "loaded only" status for Stalker ITV once itvFullListActive; radio (no full-list cache) always keeps the loaded-only hint (workspace-shell-search.service.ts).
• Windowed selection: remote channel-up/down and numeric select operate over the full filtered category, so the render window (renderLimit) grows to include a selection beyond it (ensureChannelWithinRenderWindow) instead of drifting off-screen.
• Category count badges: the context panel shows per-genre channel counts on Stalker Live TV categories (like Xtream/M3U), fed by the store computed itvCategoryItemCounts (the full list grouped by numeric tv_genre_id; the '*' "All" row's total is stored under the NaN key that Number('*') produces). Badges are ITV-only — VOD/series/radio still page lazily so their per-category totals are unknown — and show a loading shimmer while the full list is still loading (workspace-context-panel → stalkerShowCounts / stalkerCountDisplayMode).
• Censored (adult) genres: portals typically EXCLUDE these channels from get_all_channels (sometimes without even flagging the genre censored in get_genres), so the cache legitimately has zero channels for them. The content loader therefore serves a genre from the cache only when the genre-filtered result is non-empty; otherwise it falls back to the legacy paged get_ordered_list fetch, which still returns those channels. The store computed itvSelectedCategoryFromCache is the single source of truth for this mode — the live layout keys windowing/infinite-scroll/loadMore and the category-change reset off it, NOT off itvFullListActive. Count badges: genres with no cached channels get NO map entry and the category view omits their badge (omitMissingCounts) instead of showing a misleading "0". The mock server ships a censored For adults ITV category (id 1099) to exercise this path.
• Eager preload + all-channels view (Xtream parity): entering the Live TV section immediately starts the full-list load (preloadItvChannels(), fired from an effect in StalkerLiveStreamLayoutComponent — not from the first category click), so the count badges and the all-channels view are available right away. Before a category is selected, the main area shows StalkerItvAllItemsComponent — a paginated card grid of every channel in the portal (client-side pagination only; it must never touch the store's legacy page state, which would re-fire portal requests). Clicking a card runs the same playChannel flow as the sidebar. Portals without a usable full list keep the "select a category" placeholder.
• Scope: ITV only. VOD/series keep server-side search; radio keeps legacy paging (station lists are small).
• The stalker-mock-server implements get_all_channels and provides the legacy-pagination scenario MAC (00:1A:79:00:00:06) to exercise the crawl fallback.

VOD/Series Modes

Stalker has multiple real-world data shapes. The current implementation supports all three:

1. Regular Series (/series):

• Seasons come from API resource (serialSeasonsResource).
• Episodes are derived from season payload.
• This is the only mode that sets selectedSerialId, which is what drives serialSeasonsResource. It is set purely from selectedContentType === 'series' — the series detail branch renders <app-stalker-series-view /> with no vodWithSeries input, so the API resource is its only episode source and the fetch must never be gated on item shape.
• Modes 2 and 3 below are always opened under the vod content type, which leaves the id unset — otherwise every VOD detail open would fire a get_ordered_list&type=series request whose result is discarded.

2. VOD with Embedded series[]:

• Item is opened under VOD, but already contains episodes.
• StalkerSeriesViewComponent creates a pseudo-season and renders episodes directly.

3. VOD with is_series=1 (Ministra plugin behavior):

• Treated as series flow from VOD context.
• Seasons are fetched lazily.
• Episodes are fetched on season select.
• The series quick-start CTA can load the first unloaded VOD-series season before playback. Unloaded seasons are considered unplayed in full season order, so an earlier unloaded season is not skipped just because a later season was loaded manually. If all currently loaded episodes are watched and more season metadata exists, quick start loads the next unloaded season instead of showing the completed state. After a lazy load, quick start is recomputed from the mapped episodes before playback so provider episode ordering cannot start the wrong episode.
• For unloaded VOD-series seasons, the CTA target label is derived from season metadata and rendered as SxxE01 until episode details are loaded.
• Uses unique generated tracking IDs for episode playback position compatibility.
• Quick-start actions preserve both their translation key and interpolation parameters when adapted for the Stalker CTA. Dropping labelParams exposes the raw {{episode}} placeholder.

Series inline playback behavior is shared across all three modes:

• StalkerSeriesViewComponent maps every mode into mappedSeasons() and derives the currently playing episode from inlinePlayback.contentInfo.contentXtreamId.
• The inline player header shows the current episode metadata below the title, for example S01E03 - Episode title.
• Embedded players receive previous/next episode state for the current season only.
• Inline series autoplay is enabled by default. On player EOF (ended), Stalker starts the next episode only when it already exists in the current season's mapped episode list.
• Autoplay and Next stop at the last episode of the current season. They do not jump to the next season and do not lazy-load an unloaded is_series=1 season. Quick start remains the only flow that may load another VOD-series season before playback.
• Previous is disabled on the first episode of the current season and otherwise switches directly to the previous episode.
• Before either inline or external playback starts, the resolved content info includes the parent seriesXtreamId and the mapped seasonNumber / episodeNumber. Future playback-position rows therefore carry enough metadata for workspace surfaces to render an episode badge. Existing rows without those fields are intentionally not migrated and remain badge-less until the episode is played again.
• Ministra payloads may omit season_number. Episode mapping and lazy quick-start labels share the same naturally ordered season fallback so later seasons are not persisted as season 1.

The VOD-series contract is cross-surface:

• Favorites and recently viewed records preserve the raw is_series flag and VOD origin so reopening still uses the lazy Ministra resources.
• extractStalkerItemType() normalizes those activity records to dashboard type series.
• The dashboard resolves episode progress by the parent seriesXtreamId and renders the saved season/episode metadata. It does not infer episode numbers from provider payloads.

Core decision logic and normalization are centralized in:

• libs/portal/stalker/data-access/src/lib/stalker-vod.utils.ts
• libs/portal/stalker/data-access/src/lib/models/*.ts

Favorites and Recently Viewed

Current implementation is shared via Stalker-specific helpers:

• createPortalCollectionResource(...) generic collection loader
• createPortalFavoritesResource(...) favorites wrapper
• createStalkerDetailViewState(...) unified "open detail" decision
• toggleStalkerVodFavorite(...) shared add/remove behavior
• normalizeStalkerEntityId(...) and normalizeStalkerEntityIdAsNumber(...) for stable ID matching
• matchesFavoriteById(...) for cross-shape favorite matching

Where this is used:

• libs/portal/stalker/feature/src/lib/stalker-collection-detail.component.ts (favorites + recently viewed)
• libs/portal/stalker/feature/src/lib/stalker-search/stalker-search.component.ts
• libs/portal/stalker/feature/src/lib/stalker-catalog-detail/stalker-catalog-detail.component.ts
• libs/portal/stalker/feature/src/lib/stalker-favorites-button/stalker-favorites-button.component.ts

Navigation rule to preserve:

• Stalker favorites, recently viewed, and search stay in their current screen and open inline detail state.
• They should not redirect into a canonical content/category/item route because Stalker detail rendering is currently store-state/inline driven, not route driven.
• Stalker radio favorites/recent items are the exception to VOD/series inline detail opening: they are normalized as live items and must open through the shared live collection audio-player path.
• VOD-backed series favorites can be displayed in series collections, but detail opening must preserve their VOD origin: is_series=1 favorites set the selected content type to vod so the lazy Ministra season/episode resources run, and embedded series[] favorites render through the embedded VOD-series branch.
• See Portal Detail Navigation.

Embedded-series snapshot refresh

Favorites and recently-viewed rows store the whole Stalker item as a JSON snapshot, so an embedded series[] episode list (and its playback cmd) freezes at the moment the row was written — newly released episodes would never appear when the item is reopened from favorites, recents, or the dashboard rails. withStalkerSnapshotRefresh() (stores/features/with-stalker-snapshot-refresh.feature.ts) fixes this with a snapshot-first + background re-fetch contract:

• The stored snapshot renders immediately; the store method refreshEmbeddedSeriesSelection() then re-fetches the item via a portal title search (get_ordered_list&type=vod&search=<title>, item matched by id, paginated up to 5 pages, wildcard-category retry) in the background.
• When the episode list or cmd changed, the selection is patched in place. The guard requires both the item id and the active playlist id to be unchanged, because Stalker ids are only unique per portal.
• Only the in-memory selection is patched — the stored snapshot row is deliberately left alone. Every entry path into the detail view runs this refresh, so a stale stored episode list is never rendered for longer than one background request, and writing it back would add an uncontrolled background writer to the whole-playlist read-modify-write that every favorite/recent mutation performs (lost-update risk).
• Triggers: stalker-collection-detail.component.ts (favorites/recent tabs, global collections, dashboard handoffs) and the optional catalog-facade hook refreshSnapshotSelection() for snapshot-injected browse detail (openStalkerItem navigation state).
• Regular type=series and Ministra is_series favorites are unaffected — their seasons/episodes are always fetched fresh on open.

Backup and Restore

Versioned playlist backups include Stalker connection metadata plus playlist- scoped favorites/recent snapshots.

Exported fields:

• portalUrl
• macAddress
• isFullStalkerPortal
• optional username / password
• optional request headers (userAgent, referrer, origin)
• full-portal serial/device/signature fields when present
• favorites and recently viewed collections

Excluded fields:

• stalkerToken
• stalkerAccountInfo
• playback positions in backup v1

Import rule:

• backups restore the saved portal definition and replace the stored favorites/recent state for the matched playlist
• a fresh handshake must happen after import for full-portal sessions; imported backups never trust a serialized token

Remote Control Integration

Stalker live remote control is implemented in:

• libs/portal/stalker/feature/src/lib/stalker-live-stream-layout/stalker-live-stream-layout.component.ts

Supported today:

• Channel up/down
• Numeric channel selection (list-position based)
• Status publish for remote UI (portal/channel/current program)

See full backend and web-remote flow in Remote Control Architecture.

EPG Integration

Stalker ITV now splits EPG usage:

• active channel panel: bulk get_epg_info cached once per playlist and rendered through the shared EPG panel (app-epg-timeline, or app-epg-list-view in list mode)
• channel row preview: no pre-playback network requests; previews are derived from cached bulk EPG only after the first active-channel fetch succeeds
• active panel fallback: get_short_epg when bulk EPG is missing or unsupported

Full details are documented in Stalker Portal EPG Architecture.

Shared/Reusable Infrastructure

Stalker reuses some Xtream UI infrastructure deliberately:

• Category content rendering route uses Xtream category content component
• Season container for episodes uses shared Xtream season UI component
• Playback position handling for series episodes reuses Xtream store position mechanisms
• Downloads route reuses shared downloads feature

This reduces duplicate UI logic across portal types and keeps compatibility behavior aligned.

Regression Coverage

Focused regression tests for Stalker VOD mode branching and the cross-surface series contract live in:

• libs/portal/stalker/data-access/src/lib/stalker-vod.utils.spec.ts
• libs/portal/stalker/feature/src/lib/stalker-series-view/stalker-series-view.component.spec.ts
• libs/workspace/dashboard/data-access/src/lib/dashboard-data.service.spec.ts

Covered scenarios include:

• Embedded series[] opens series view state
• is_series=1 opens lazy series state
• VOD-backed series favorites keep VOD-series loading semantics when opened from favorites/global favorites
• Favorite toggle helper path invokes the expected add/remove flow
• Quick-start episode labels interpolate their episode number
• Inline and external episode handoffs carry resolved season/episode metadata
• Dashboard activity classifies is_series VOD as series and resolves its saved episode position