132 lines
3.4 KiB
Python
132 lines
3.4 KiB
Python
from collections.abc import Iterable
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from typing import TypedDict
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from folkugat_web.dal.sql import Connection, get_connection
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from folkugat_web.model import temes as model
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LyricRowTuple = tuple[int, int, str, str, int | None]
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class LyricRowDict(TypedDict):
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id: int | None
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tema_id: int
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title: str
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content: str
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max_columns: int | None
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def lyric_to_row(lyric: model.Lyrics) -> LyricRowDict:
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return {
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"id": lyric.id,
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"tema_id": lyric.tema_id,
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"title": lyric.title,
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"content": lyric.content,
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"max_columns": lyric.max_columns,
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}
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def row_to_lyric(row: LyricRowTuple) -> model.Lyrics:
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return model.Lyrics(
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id=row[0],
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tema_id=row[1],
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title=row[2],
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content=row[3],
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max_columns=row[4],
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)
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class QueryData(TypedDict, total=False):
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id: int
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tema_id: int
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def _filter_clause(
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lyric_id: int | None,
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tema_id: int | None,
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) -> tuple[str, QueryData]:
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filter_clauses: list[str] = []
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filter_data: QueryData = {}
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if lyric_id is not None:
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filter_clauses.append("id = :id")
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filter_data["id"] = lyric_id
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if tema_id is not None:
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filter_clauses.append("tema_id = :tema_id")
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filter_data["tema_id"] = tema_id
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filter_clause = " AND ".join(filter_clauses)
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return filter_clause, filter_data
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def get_lyrics(lyric_id: int | None = None, tema_id: int | None = None, con: Connection | None = None) -> Iterable[model.Lyrics]:
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filter_clause, data = _filter_clause(lyric_id=lyric_id, tema_id=tema_id)
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if filter_clause:
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filter_clause = f"WHERE {filter_clause}"
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query = f"""
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SELECT
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id, tema_id, title, content, max_columns
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FROM tema_lyrics
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{filter_clause}
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"""
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with get_connection(con) as con:
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cur = con.cursor()
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_ = cur.execute(query, data)
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return map(row_to_lyric, cur.fetchall())
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def insert_lyric(lyric: model.Lyrics, con: Connection | None = None) -> model.Lyrics:
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data = lyric_to_row(lyric)
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query = f"""
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INSERT INTO tema_lyrics
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(id, tema_id, title, content, max_columns)
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VALUES
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(:id, :tema_id, :title, :content, :max_columns)
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RETURNING *
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"""
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with get_connection(con) as con:
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cur = con.cursor()
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_ = cur.execute(query, data)
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row: LyricRowTuple = cur.fetchone()
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return row_to_lyric(row)
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def create_lyric(tema_id: int, title: str | None = None, con: Connection | None = None) -> model.Lyrics:
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new_lyric = model.Lyrics(
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id=None,
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tema_id=tema_id,
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title=title or "",
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content="",
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max_columns=None,
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)
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return insert_lyric(new_lyric, con=con)
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def update_lyric(lyric: model.Lyrics, con: Connection | None = None):
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data = lyric_to_row(lyric)
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query = """
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UPDATE tema_lyrics
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SET
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tema_id = :tema_id, title = :title, content = :content, max_columns = :max_columns
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WHERE
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id = :id
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"""
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with get_connection(con) as con:
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cur = con.cursor()
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_ = cur.execute(query, data)
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def delete_lyric(lyric_id: int, tema_id: int | None = None, con: Connection | None = None):
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filter_clause, data = _filter_clause(lyric_id=lyric_id, tema_id=tema_id)
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if filter_clause:
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filter_clause = f"WHERE {filter_clause}"
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query = f"""
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DELETE FROM tema_lyrics
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{filter_clause}
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"""
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with get_connection(con) as con:
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cur = con.cursor()
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_ = cur.execute(query, data)
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