Automate compile-time personalized OG image generation and testing

app/models.py

@@ -14,10 +14,10 @@ class Attendee(db.Model):
     phone = db.Column(db.String(15), nullable=False)
     dietary_restrictions = db.Column(db.String(255))
     created_at = db.Column(
-        db.DateTime, server_default=db.text("current_timestamp():::TIMESTAMPTZ")
+        db.DateTime, server_default=db.text("current_timestamp::TIMESTAMPTZ")
     )
     updated_at = db.Column(
-        db.DateTime, server_default=db.text("current_timestamp():::TIMESTAMPTZ")
+        db.DateTime, server_default=db.text("current_timestamp::TIMESTAMPTZ")
     )
     invited = db.Column(db.Boolean, nullable=False, server_default=db.text("true"))
 
@@ -35,10 +35,10 @@ class Event(db.Model):
     location = db.Column(db.String(600), nullable=False)
     description = db.Column(db.String(1000), nullable=False)
     created_at = db.Column(
-        db.DateTime, server_default=db.text("current_timestamp():::TIMESTAMPTZ")
+        db.DateTime, server_default=db.text("current_timestamp::TIMESTAMPTZ")
     )
     updated_at = db.Column(
-        db.DateTime, server_default=db.text("current_timestamp():::TIMESTAMPTZ")
+        db.DateTime, server_default=db.text("current_timestamp::TIMESTAMPTZ")
     )
     image_id = db.Column(db.String(30), nullable=False)
 
@@ -53,12 +53,12 @@ class EventAttendeeJunction(db.Model):
     public_id = db.Column(db.String(12), nullable=False)
     event_id = db.Column(db.ForeignKey("events.id", ondelete="CASCADE"))
     attendee_id = db.Column(db.ForeignKey("attendee.id", onupdate="CASCADE"))
-    rsvp = db.Column(NullType)
+    rsvp = db.Column(db.String(255))
     created_at = db.Column(
-        db.DateTime, server_default=db.text("current_timestamp():::TIMESTAMPTZ")
+        db.DateTime, server_default=db.text("current_timestamp::TIMESTAMPTZ")
     )
     updated_at = db.Column(
-        db.DateTime, server_default=db.text("current_timestamp():::TIMESTAMPTZ")
+        db.DateTime, server_default=db.text("current_timestamp::TIMESTAMPTZ")
     )
 
     attendee = relationship("Attendee")

app/templates/attendee_rsvp.html

@@ -1,4 +1,8 @@
 {% extends "base.html" %}{%block coverimage %}{{event.image_id}}{% endblock %}
+
+{% block og_image %}{{ url_for('static', filename='images/og/rsvp_' ~ event_junction_public_id ~ '.png') }}{% endblock %}
+{% block twitter_image %}{{ url_for('static', filename='images/og/rsvp_' ~ event_junction_public_id ~ '.png') }}{% endblock %}
+
 {% block content %}
 
 <section class="hero is-fullheight is-flex-touch">

app/templates/base.html

@@ -26,7 +26,7 @@
         />
         <meta
             property="og:image"
-            content="{{ url_for('static', filename='images/image.png') }}"
+            content="{% block og_image %}{{ url_for('static', filename='images/image.png') }}{% endblock %}"
         />
 
         <!-- Twitter Meta Tags -->
@@ -40,7 +40,7 @@
         />
         <meta
             name="twitter:image"
-            content="{{ url_for('static', filename='images/image.png') }}"
+            content="{% block twitter_image %}{{ url_for('static', filename='images/image.png') }}{% endblock %}"
         />
 
         {% if title %}

freeze.py

@@ -134,12 +134,81 @@ def attendee_rsvp():
 def not_found_page():
     yield {}
 
+def generate_og_images():
+    """Generate custom Open Graph images for all active RSVPs"""
+    from PIL import ImageDraw, ImageFont
+
+    og_dir = Path(app.static_folder) / 'images' / 'og'
+    og_dir.mkdir(parents=True, exist_ok=True)
+
+    font_path = Path(app.static_folder) / 'font' / 'LCDBlock.ttf'
+    try:
+        title_font = ImageFont.truetype(str(font_path), 50)
+        subtitle_font = ImageFont.truetype(str(font_path), 35)
+    except:
+        title_font = ImageFont.load_default()
+        subtitle_font = ImageFont.load_default()
+
+    utc = pytz.UTC
+    now = datetime.now(utc)
+    time_diff = timedelta(days=1)
+
+    active_events = Event.query.filter(Event.date >= now - time_diff).all()
+
+    for event in active_events:
+        rsvps = (
+            EventAttendeeJunction.query
+            .join(Attendee)
+            .filter(EventAttendeeJunction.event_id == event.id)
+            .filter(Attendee.invited == True)
+            .all()
+        )
+        for rsvp in rsvps:
+            out_path = og_dir / f"rsvp_{rsvp.public_id}.png"
+            if out_path.exists():
+                continue
+
+            base_img_path = Path(app.static_folder) / 'images' / 'image.png'
+            if base_img_path.exists():
+                try:
+                    img = Image.open(base_img_path).convert("RGBA").resize((1200, 630))
+                    overlay = Image.new('RGBA', img.size, (0, 0, 0, 160))
+                    img = Image.alpha_composite(img, overlay).convert("RGB")
+                except:
+                    img = Image.new('RGB', (1200, 630), color=(10, 10, 10))
+            else:
+                img = Image.new('RGB', (1200, 630), color=(10, 10, 10))
+
+            draw = ImageDraw.Draw(img)
+
+            attendee_name = rsvp.attendee.attendee if rsvp.attendee.attendee else "Guest"
+
+            text = f"You're invited, {attendee_name}!"
+            draw.text((100, 120), text, font=title_font, fill=(255, 255, 255))
+
+            event_text = f"Event: {event.event}"
+            draw.text((100, 240), event_text, font=subtitle_font, fill=(200, 200, 200))
+
+            date_str = event.date.strftime("%B %d, %Y")
+            date_text = f"Date: {date_str}"
+            draw.text((100, 320), date_text, font=subtitle_font, fill=(200, 200, 200))
+
+            loc_text = f"Location: {event.location}"
+            draw.text((100, 400), loc_text, font=subtitle_font, fill=(200, 200, 200))
+
+            img.save(out_path)
+            print(f"Generated OG image for {attendee_name} (RSVP {rsvp.public_id})")
 
 if __name__ == "__main__":
     # Cache images before freezing
     with app.app_context():
+
         print("Caching event images...")
         cache_event_images()
         print()
+
+        print("Generating OG images...")
+        generate_og_images()
+        print()
 
     freezer.freeze()