Fix SSE route dependency and align architecture docs

backend/app/infrastructure/storage/json_document_repository.py

@@ -0,0 +1,109 @@
+"""Implement infrastructure support for json document repository."""
+
+from __future__ import annotations
+
+import json
+from datetime import UTC, datetime
+from pathlib import Path
+
+from app.domain.documents import Document, DocumentRepository, DocumentStatus
+# Keep adapter behavior explicit so integration details remain easy to audit.
+
+
+
+class JsonDocumentRepository(DocumentRepository):
+    """Provide the Json Document Repository repository implementation."""
+    def __init__(self, file_path: str) -> None:
+        """Initialize the Json Document Repository instance."""
+        self.file_path = Path(file_path)
+        self.file_path.parent.mkdir(parents=True, exist_ok=True)
+        if not self.file_path.exists():
+            self.file_path.write_text("{}", encoding="utf-8")
+
+    def _load(self) -> dict[str, dict]:
+        """Handle load for this module for the Json Document Repository instance."""
+        return json.loads(self.file_path.read_text(encoding="utf-8") or "{}")
+
+    def _save(self, payload: dict[str, dict]) -> None:
+        """Handle save for this module for the Json Document Repository instance."""
+        self.file_path.write_text(json.dumps(payload, ensure_ascii=False, indent=2), encoding="utf-8")
+
+    def _serialize(self, document: Document) -> dict:
+        """Handle serialize for this module for the Json Document Repository instance."""
+        payload = document.__dict__.copy()
+        payload["status"] = document.status.value
+        payload["created_at"] = document.created_at.isoformat()
+        payload["updated_at"] = document.updated_at.isoformat()
+        return payload
+
+    def _deserialize(self, payload: dict) -> Document:
+        """Handle deserialize for this module for the Json Document Repository instance."""
+        return Document(
+            **{
+                **payload,
+                "status": DocumentStatus(payload["status"]),
+                "created_at": datetime.fromisoformat(payload["created_at"]),
+                "updated_at": datetime.fromisoformat(payload["updated_at"]),
+            }
+        )
+
+    def create(self, document: Document) -> Document:
+        """Handle create for the Json Document Repository instance."""
+        payload = self._load()
+        payload[document.doc_id] = self._serialize(document)
+        self._save(payload)
+        return document
+
+    def update(self, document: Document) -> Document:
+        """Handle update for the Json Document Repository instance."""
+        document.updated_at = datetime.now(UTC)
+        payload = self._load()
+        payload[document.doc_id] = self._serialize(document)
+        self._save(payload)
+        return document
+
+    def get(self, doc_id: str) -> Document | None:
+        """Handle get for the Json Document Repository instance."""
+        payload = self._load()
+        item = payload.get(doc_id)
+        return self._deserialize(item) if item else None
+
+    def list(self, limit: int | None = None) -> list[Document]:
+        """Handle list for the Json Document Repository instance."""
+        payload = self._load()
+        documents = [self._deserialize(item) for item in payload.values()]
+        documents.sort(key=lambda item: item.updated_at, reverse=True)
+        return documents[:limit] if limit is not None else documents
+
+    def update_status(
+        self,
+        doc_id: str,
+        status: DocumentStatus,
+        *,
+        error_message: str = "",
+        chunk_count: int | None = None,
+        summary: str | None = None,
+        summary_latency_ms: int | None = None,
+        parser_name: str | None = None,
+        index_name: str | None = None,
+        metadata: dict | None = None,
+    ) -> Document | None:
+        """Update status for the Json Document Repository instance."""
+        document = self.get(doc_id)
+        if not document:
+            return None
+        document.status = status
+        document.error_message = error_message
+        if chunk_count is not None:
+            document.chunk_count = chunk_count
+        if summary is not None:
+            document.summary = summary
+        if summary_latency_ms is not None:
+            document.summary_latency_ms = summary_latency_ms
+        if parser_name is not None:
+            document.parser_name = parser_name
+        if index_name is not None:
+            document.index_name = index_name
+        if metadata:
+            document.metadata.update(metadata)
+        return self.update(document)