feat: generate source-only watch thumbnails after photo uploads

2026-10-23 13:27:17 +08:00
parent fdc3a886f7
commit d94031eb50
6 changed files with 220 additions and 9 deletions
@@ -0,0 +1,57 @@
+"""Source-only rendition for the current 410 × 502 watch display."""
+
+import hashlib
+import json
+import logging
+from datetime import datetime
+from zoneinfo import ZoneInfo
+
+from pigway_frame_flow.errors import FlowError
+from pigway_frame_flow.renderers.images import convert
+from pigway_frame_flow.storage.database import encode
+
+logger = logging.getLogger(__name__)
+SIZE = (410, 502)
+
+
+def publish(service, device_id, asset_id, data=None):
+    # Templates and old gallery assets have no verified undecorated source.
+    row = service.db.one(
+        "SELECT payload FROM asset_sources WHERE asset_id=?", (asset_id,)
+    )
+    source = json.loads(row["payload"]) if row else {}
+    if source.get("type") != "photo_source":
+        return None
+    try:
+        if data is None:
+            data, _, _ = service.photo_sources.read(
+                source["source_id"], source["item_id"], target_size=SIZE
+            )
+        rendered = convert(data, "cover", "color", size=SIZE)
+        asset = service.assets.put(rendered, "watch.jpg", "cache")
+        now = datetime.now(ZoneInfo(service.settings.timezone))
+        result = {
+            "asset_id": asset["asset_id"],
+            "url": asset["url"],
+            "width": SIZE[0],
+            "height": SIZE[1],
+            "date": now.date().isoformat(),
+            "timezone": service.settings.timezone,
+            "generated_at": now.isoformat(),
+            "sha256": hashlib.sha256(rendered).hexdigest(),
+            "bytes": len(rendered),
+            "source": source,
+            "fit": "cover",
+            "source_rendition": "preview"
+            if service.photo_sources.get(source["source_id"]).kind == "synology-photos"
+            else "source",
+        }
+        service.db.execute(
+            "INSERT OR REPLACE INTO app_config VALUES(?,?)",
+            ("wrist-thumbnail:" + device_id, encode(result)),
+        )
+        return result
+    except (FlowError, OSError, ValueError):
+        # An auxiliary rendition must never cause a successful upload to replay.
+        logger.warning("Watch thumbnail generation failed for asset %s", asset_id)
+        return None