e66af77ff6
Cin's review note: typing artist_name as plain `str` forced callers that didn't have a name to pass `""` as a placeholder, which leaks the parameter's emptiness contract into every call site and reads badly in tests. Switching to `Optional[str] = None` lets callers omit it. The function body's `if artist_name and active_server:` check already handles None and "" identically, so no body changes were needed. Tests that previously passed `artist_name=""` drop the argument; one new test covers the omitted-arg path explicitly. The web_server.py wrapper takes the same default for symmetry.
88 lines
2.9 KiB
Python
88 lines
2.9 KiB
Python
"""Source-artist → library lookup helpers.
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Extracted from `web_server.py` so the logic can be imported and unit-tested
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without booting the Flask app, Spotify client, Soulseek connection, etc.
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Two concepts live here:
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* ``SOURCE_ID_FIELD`` — the per-source column on the ``artists`` table that
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stores the external service ID (Spotify track ID, Deezer artist ID, …).
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This map is what ties a result clicked in the source-aware Search results
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back to a library record so we can serve the richer library view.
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* ``find_library_artist_for_source`` — given a source-aware click (e.g.
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``deezer:525046``), try to locate a matching library artist. First by
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direct column match against the source's ID column, then by case-
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insensitive name match scoped to the active media server.
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"""
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from __future__ import annotations
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import logging
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from typing import Optional
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logger = logging.getLogger("artist_source_lookup")
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SOURCE_ONLY_ARTIST_SOURCES = frozenset({
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"spotify", "itunes", "deezer", "discogs", "hydrabase", "musicbrainz",
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})
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SOURCE_ID_FIELD = {
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"spotify": "spotify_artist_id",
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"itunes": "itunes_artist_id",
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"deezer": "deezer_id",
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"discogs": "discogs_id",
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"hydrabase": "soul_id",
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"musicbrainz": "musicbrainz_id",
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}
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def find_library_artist_for_source(
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database,
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source: str,
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source_artist_id: str,
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artist_name: Optional[str] = None,
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active_server: Optional[str] = None,
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) -> Optional[str]:
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"""Return the library PK of an artist matching the source-aware click.
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Lookup order:
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1. Direct match on the source-specific ID column (server-agnostic — any
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library record with the right external ID is a hit).
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2. Case-insensitive name match within ``active_server`` (defaults to the
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active media server when not provided), so we don't jump the user
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across server contexts on a name collision.
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Returns ``None`` on miss or on any database error.
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"""
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column = SOURCE_ID_FIELD.get(source)
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if not column:
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return None
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try:
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with database._get_connection() as conn:
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cursor = conn.cursor()
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cursor.execute(
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f"SELECT id, name FROM artists WHERE {column} = ? LIMIT 1",
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(str(source_artist_id),),
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)
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row = cursor.fetchone()
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if row:
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return row[0]
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if artist_name and active_server:
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cursor.execute(
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"SELECT id FROM artists "
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"WHERE LOWER(name) = LOWER(?) AND server_source = ? LIMIT 1",
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(artist_name, active_server),
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)
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row = cursor.fetchone()
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if row:
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return row[0]
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except Exception as e:
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logger.debug(
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f"Library upgrade lookup failed for {source}:{source_artist_id}: {e}"
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)
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return None
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