# archive/src/media_library_viewer/domain
dir: archive/src/media_library_viewer/domain

index: archive/src/media_library_viewer/domain/.pi-map.index.md

## role
Provides domain-level normalization logic that transforms inconsistent Jellyfin API responses into stable, flattened data structures for storage and display.
## files
- __init__.py | Serves as the package docstring for a domain-level helpers/normalization module that converts external data into stable app concepts.
- media.py | Flattens inconsistent Jellyfin API item JSON into stable, normalized dictionaries for SQLite storage and frontend display. | exp: func:first_media_source(item: dict[str, Any]) → dict[str, Any], call:item.get, func:media_streams(item: dict[str, Any], stream_type) → list[dict[str, Any]], call:item.get, call:streams.extend, call:source.get, call:str(stream.get("Type") or stream.get("codec_type") or "").lower, call:stream.get, call:stream_type.lower, func:stream_value(stream: dict[str, Any], *keys: str) → Any, func:is_hdr_item(item: dict[str, Any]) → bool, call:media_streams, call:stream_value, call:" ".join, call:str(value).lower, call:any, func:format_date_added(value: str | None) → str, call:pd.to_datetime(value).strftime, call:str, func:timestamp_date_added(value: str | None) → int | None, call:int, call:pd.to_datetime(value).timestamp, func:format_rate_bits_decimal(bits_per_second: float | int | str | None) → str, call:float, call:str, func:normalize_media_item(item: dict[str, Any], library_id, library_name) → dict[str, Any], call:first_media_source, call:media_streams, call:source.get, call:item.get, call:stream_value, call:is_hdr_item, call:int, call:ticks_to_minutes, call:human_size, call:format_rate_bits_decimal, call:video.get, call:format_date_added, call:timestamp_date_added, func:display_media_row(row: dict[str, Any]) → dict[str, Any], call:row.get, call:human_size, call:format_rate_bits_decimal | dep: typing, media_library_viewer.utils, pandas, media_library_viewer.utils (human_size, ticks_to_minutes)
## arch
Functional transformation layer pattern mapping raw external API JSON directly into normalized flat dictionaries without intermediate ORM or complex object hierarchies.
## tags
media, call:str, date, added, item, call:item.get, streams, call:stream
## symbols
- first_media_source
- media_streams
- stream_value
- is_hdr_item
- format_date_added
- timestamp_date_added
- format_rate_bits_decimal
- normalize_media_item
## workflows
- change domain behavior
  read: __init__.py, media.py
## dirty
-
