pixiv joins NATIVE_INGESTER_PLATFORMS: download/verify/preview and the
recover/recapture UI actions now route through PixivIngester. Campaign id is
parsed straight from the source URL (numeric user id — no network resolver),
with a platform-aware resolution-failure message. auth_token now rides the
uniform adapter construction (token platforms use it, cookie platforms
accept-and-ignore), and the preview endpoint fetches/threads it. The legacy
gallery-dl pixiv path is fully removed (PLATFORM_DEFAULTS entry + the
refresh-token config branches in download/verify) per no-legacy policy;
gallery-dl keeps hentaifoundry/discord/deviantart until they migrate/retire.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CDgx8bQS5YrGRK76v8HUnM
Operator-requested 2026-05-27: centralize the per-platform quirks that
had been accumulating across credential_service, sidecar, and platforms
into a single per-platform module so adding/updating quirks becomes
"edit one file."
**Layout**
services/platforms/
base.py PlatformInfo dataclass + module-default key
chains + shared helpers (str_id_value, str_field)
__init__.py PLATFORMS dict + public API (auth_type_for,
known_platform_keys, to_dict,
external_post_id_keys_for, description_keys_for)
patreon.py metadata only — the reference platform, no quirks
subscribestar.py metadata + augment_cookies (18+ agreement) +
derive_post_url (synthetic /posts/<post_id>)
hentaifoundry.py metadata + augment_cookies (host-only PHPSESSID
duplicate) + derive_post_url (/pictures/user/...)
pixiv.py metadata + derive_post_url (/artworks/<id>)
discord.py metadata + derive_post_url
(channels/<server>/<channel>/<message>)
deviantart.py metadata only — un-audited; quirks to be added
when an operator first exercises DA
**PlatformInfo extensions**
Existing fields preserved. Four new optional fields:
external_post_id_keys: tuple[str, ...] | None
Override the sidecar external_post_id lookup chain. None falls
back to DEFAULT_EXTERNAL_POST_ID_KEYS in base.py
("post_id", "id", "index", "message_id") — covers every current
platform.
description_keys: tuple[str, ...] | None
Override the description body lookup chain. None falls back to
DEFAULT_DESCRIPTION_KEYS ("content", "description", "caption",
"message") — Discord's "message" body field is covered by the
default's trailing entry.
derive_post_url: Callable[[dict], str | None] | None
Synthesize the post permalink from sidecar metadata. None = trust
the bare `url` / `post_url` field (patreon, deviantart).
subscribestar/pixiv/hf/discord override this because their `url`
is the file CDN URL.
augment_cookies: Callable[[str], str] | None
Post-process the materialized cookies.txt before gallery-dl
consumes it. None = no-op. Used by subscribestar (age cookie) and
hentaifoundry (host-only PHPSESSID duplicate).
**Consumer changes**
- credential_service._augment_cookies(platform, netscape) shrunk from a
per-platform-conditional dispatcher (~80 lines of inlined helpers) to
a 5-line lookup: `info.augment_cookies(netscape) if info and
info.augment_cookies else netscape`. The platform-specific helper
bodies moved verbatim into the per-platform modules.
- sidecar.parse_sidecar similarly delegates: external_post_id chain via
external_post_id_keys_for(category), description chain via
description_keys_for(category), post_url via
PLATFORMS[category].derive_post_url. The _DERIVED_URL_PLATFORMS set
and inline _derive_post_url body both gone. Added a shared `_first_id`
helper for bool-safe id coercion.
**Public API preserved**
PLATFORMS, PlatformInfo, auth_type_for, known_platform_keys, to_dict
are all re-exported from the package's __init__.py. test_platforms_registry
test_credential_service, and test_sidecar_util pass without changes
because the behavior is identical; only the implementation moved.
**Adding a new platform**
1. Create services/platforms/<name>.py with `INFO = PlatformInfo(...)`
and any of the four optional hooks.
2. Import it in services/platforms/__init__.py + add to the PLATFORMS
tuple-comprehension.
3. Done. sidecar parsing, cookie materialization, /api/platforms all
pick it up automatically.
bvandeusen