refactor: split api dependencies by domain

app/api/dependencies/history.py

@@ -0,0 +1,86 @@
+"""历史、媒体服务器与 Dashboard 查询依赖。"""
+
+from fastapi import Depends
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy.orm import Session
+
+from app.api.data import get_async_db, get_db
+from app.api.dependencies.data import repository, transaction
+from app.application.dashboard import DashboardQueryService
+from app.application.history import (
+    DownloadHistoryMutationCommand,
+    HistoryQueryService,
+    TransferHistoryLookupService,
+    TransferHistoryMutationCommand,
+    clear_transfer_failures,
+)
+from app.application.mediaserver import MediaServerQueryService
+from app.chain.storage import StorageChain
+from app.runtime.events import eventmanager
+from app.schemas.types import EventType
+from app.schemas.workflow import FileItem as _SchemaFileItem
+
+
+def get_mediaserver_query_service(
+    db: AsyncSession = Depends(get_async_db),
+) -> MediaServerQueryService:
+    """组装媒体服务器本地条目异步查询服务。"""
+    return MediaServerQueryService(repository=repository("media_server", db))
+
+
+def get_dashboard_query_service(
+    db: Session = Depends(get_db),
+) -> DashboardQueryService:
+    """组装 Dashboard 媒体与整理历史统计查询服务。"""
+    from app.chain.dashboard import DashboardChain
+
+    return DashboardQueryService(
+        repository=repository("transfer_history", db),
+        media_statistics=DashboardChain().media_statistic,
+    )
+
+
+def get_download_history_mutation_command(
+    db: Session = Depends(get_db),
+) -> DownloadHistoryMutationCommand:
+    """组装下载历史删除用例及其请求级事务。"""
+    return DownloadHistoryMutationCommand(
+        repository=repository("download_history", db),
+        unit_of_work=transaction("sync", db),
+    )
+
+
+def get_history_query_service(
+    db: AsyncSession = Depends(get_async_db),
+) -> HistoryQueryService:
+    """组装历史列表和详情异步查询服务。"""
+    return HistoryQueryService(
+        download_repository=repository("download_history", db),
+        transfer_repository=repository("transfer_history", db),
+    )
+
+
+def get_transfer_history_lookup_service(
+    db: Session = Depends(get_db),
+) -> TransferHistoryLookupService:
+    """组装手动整理使用的同步历史投影服务。"""
+    return TransferHistoryLookupService(repository("transfer_history", db))
+
+
+def get_transfer_history_mutation_command(
+    db: Session = Depends(get_db),
+) -> TransferHistoryMutationCommand:
+    """组装整理历史删除、文件处理和事件发布用例。"""
+    storage_chain = StorageChain()
+    return TransferHistoryMutationCommand(
+        repository=repository("transfer_history", db),
+        download_repository=repository("download_history", db),
+        unit_of_work=transaction("sync", db),
+        file_item_factory=lambda payload: _SchemaFileItem(**payload),
+        delete_media_file=storage_chain.delete_media_file,
+        publish_download_file_deleted=lambda payload: eventmanager.send_event(
+            EventType.DownloadFileDeleted,
+            payload,
+        ),
+        clear_failures=clear_transfer_failures,
+    )