Track posted photos. Cache images.

README.md

@@ -30,4 +30,4 @@ Station Announcer is a small Flask app that keeps your Immich library and Mastod
 * Hit **Improve text with ChatGPT** as many times as you like; the model polishes grammar, tone, and UK English spellings while respecting your extra notes.
 * When ready, choose **Post to Mastodon** to upload the selected media (with their alt text) and publish the refined caption (optionally as a reply) via the configured access token.
 
-The app stores alt text in `instance/alt_text_cache.db`. Remove this file to clear the cache.
+The app stores cached data in `instance/station_announcer.db` (or wherever `STATION_DB` points). Remove this file to clear the cache.

static/styles.css

@@ -222,6 +222,11 @@ body {
   cursor: pointer;
 }
 
+.select-card.used {
+  background: #122542;
+  border-color: #2b4c7a;
+}
+
 .select-card input[type=\"checkbox\"] {
   width: 1rem;
   height: 1rem;
@@ -242,6 +247,11 @@ body {
   overflow: hidden;
 }
 
+.usage {
+  font-size: 0.8rem;
+  color: #8dc5ff;
+}
+
 .compose-form {
   display: flex;
   flex-direction: column;

station_announcer/__init__.py

@@ -27,12 +27,17 @@ def create_app() -> Flask:
     secret_key = app.config.get("SECRET_KEY") or "dev-secret-key"
     app.config["SECRET_KEY"] = secret_key
 
-    db_path = app.config.get("ALT_TEXT_DB")
-    if not db_path:
-        db_path = str(Path(app.instance_path) / "alt_text_cache.db")
-        app.config["ALT_TEXT_DB"] = db_path
+    instance_dir = Path(app.instance_path)
+    instance_dir.mkdir(parents=True, exist_ok=True)
 
-    Path(app.instance_path).mkdir(parents=True, exist_ok=True)
+    db_path = app.config.get("STATION_DB")
+    if not db_path:
+        old_db = instance_dir / "alt_text_cache.db"
+        new_db = instance_dir / "station_announcer.db"
+        if old_db.exists() and not new_db.exists():
+            old_db.rename(new_db)
+        db_path = str(new_db)
+        app.config["STATION_DB"] = db_path
 
     app.immich_client = ImmichClient(
         base_url=app.config["IMMICH_API_URL"],

station_announcer/cache.py

@@ -5,7 +5,7 @@ from __future__ import annotations
 import sqlite3
 from datetime import datetime, timezone
 from pathlib import Path
-from typing import Optional
+from typing import Dict, Iterable, Optional
 
 
 class AltTextCache:
@@ -33,6 +33,15 @@ class AltTextCache:
                 )
                 """
             )
+            conn.execute(
+                """
+                CREATE TABLE IF NOT EXISTS asset_usage (
+                    asset_id TEXT PRIMARY KEY,
+                    last_posted_at TEXT NOT NULL,
+                    last_post_url TEXT
+                )
+                """
+            )
             conn.commit()
 
     def get(self, asset_id: str) -> Optional[str]:
@@ -57,3 +66,31 @@ class AltTextCache:
                 (asset_id, alt_text, timestamp),
             )
             conn.commit()
+
+    def mark_posted(self, asset_id: str, post_url: Optional[str] = None) -> None:
+        timestamp = datetime.now(timezone.utc).isoformat()
+        with self._connect() as conn:
+            conn.execute(
+                """
+                INSERT INTO asset_usage(asset_id, last_posted_at, last_post_url)
+                VALUES(?, ?, ?)
+                ON CONFLICT(asset_id)
+                DO UPDATE SET last_posted_at = excluded.last_posted_at,
+                              last_post_url = excluded.last_post_url
+                """,
+                (asset_id, timestamp, post_url),
+            )
+            conn.commit()
+
+    def get_usage_map(self, asset_ids: Iterable[str]) -> Dict[str, sqlite3.Row]:
+        ids = [asset_id for asset_id in asset_ids if asset_id]
+        if not ids:
+            return {}
+        placeholders = ",".join(["?"] * len(ids))
+        query = (
+            "SELECT asset_id, last_posted_at, last_post_url FROM asset_usage"
+            f" WHERE asset_id IN ({placeholders})"
+        )
+        with self._connect() as conn:
+            rows = conn.execute(query, ids).fetchall()
+        return {row["asset_id"]: row for row in rows}

station_announcer/config.py

@@ -19,13 +19,15 @@ def load_settings() -> Dict[str, str]:
 
     load_dotenv()
 
+    db_path = os.getenv("STATION_DB", "")
+
     settings: Dict[str, str] = {
         "IMMICH_API_URL": os.getenv("IMMICH_API_URL", DEFAULT_IMMICH_URL).rstrip("/"),
         "IMMICH_API_KEY": os.getenv("IMMICH_API_KEY", ""),
         "OPENAI_API_KEY": os.getenv("OPENAI_API_KEY", ""),
         "RECENT_DAYS": int(os.getenv("RECENT_DAYS", "3")),
         "OPENAI_MODEL": os.getenv("OPENAI_MODEL", "gpt-4o-mini"),
-        "ALT_TEXT_DB": os.getenv("ALT_TEXT_DB", ""),
+        "STATION_DB": db_path,
         "SECRET_KEY": os.getenv("SECRET_KEY", ""),
         "MASTODON_BASE_URL": os.getenv(
             "MASTODON_BASE_URL", "http://localhost:3000"

station_announcer/routes.py

@@ -205,14 +205,21 @@ def compose_select():
     except ImmichError as exc:
         error_message = str(exc)
 
+    usage_map = alt_cache.get_usage_map(asset.id for asset in asset_objs)
+
     assets = []
     for asset in asset_objs:
+        usage = usage_map.get(asset.id)
         assets.append(
             {
                 "id": asset.id,
                 "file_name": asset.file_name,
                 "captured_display": _humanize_timestamp(asset.captured_at),
                 "alt_text": alt_cache.get(asset.id),
+                "posted": bool(usage),
+                "last_posted_display": _humanize_timestamp(
+                    usage["last_posted_at"] if usage else None
+                ),
             }
         )
 
@@ -369,6 +376,8 @@ def compose_draft():
                         post_text.strip(), media_ids, in_reply_to_id=reply_id
                     )
                     status_url = status.get("url")
+                    for asset in assets:
+                        alt_cache.mark_posted(asset.id, status_url)
                     if status_url:
                         flash(
                             f'Post sent to Mastodon: <a href="{status_url}" target="_blank" rel="noopener">{status_url}</a>',
@@ -407,4 +416,6 @@ def asset_proxy(asset_id: str, variant: str):
         content, mimetype = immich_client.fetch_asset_content(asset_id, variant)
     except ImmichError as exc:
         abort(404, description=str(exc))
-    return Response(content, mimetype=mimetype)
+    response = Response(content, mimetype=mimetype)
+    response.headers.setdefault("Cache-Control", "public, max-age=3600")
+    return response

templates/compose_select.html

@@ -18,7 +18,7 @@
       </div>
       <div class="select-grid">
         {% for asset in assets %}
-          <label class="select-card">
+          <label class="select-card {% if asset.posted %}used{% endif %}">
             <input type="checkbox" name="asset_ids" value="{{ asset.id }}" {% if selected_ids and asset.id in selected_ids %}checked{% endif %}>
             <div class="thumbnail">
               <img src="{{ url_for('main.asset_proxy', asset_id=asset.id, variant='thumbnail') }}" alt="{{ asset.file_name }}">
@@ -31,6 +31,9 @@
               {% if asset.alt_text %}
                 <div class="alt-text-sample">{{ asset.alt_text }}</div>
               {% endif %}
+              {% if asset.posted %}
+                <div class="usage">Posted{% if asset.last_posted_display %} {{ asset.last_posted_display }}{% endif %}</div>
+              {% endif %}
             </div>
           </label>
         {% endfor %}