dithered images

still needs to be integrated with celery, but works for now

playlist/static/style.css

@@ -154,7 +154,7 @@ iframe {
 	font-weight: normal;
 }
 #album img {
-	max-width: 256px;
+	width: 256px;
 }
 
 input[type="range"] {

playlist/tasks.py

@@ -1,5 +1,8 @@
 from celery import shared_task
 from .models import Track
+from django.core.files import File
+from django.core.files.uploadedfile import InMemoryUploadedFile
+from django.core.files.base import ContentFile
 
 import os
 import dotenv
@@ -7,6 +10,8 @@ import dotenv
 import json
 from requests import get, post
 from requests.exceptions import ConnectionError
+from PIL import Image
+from io import BytesIO
 
 dotenv.load_dotenv()
 
@@ -52,3 +57,17 @@ def get_banter(id):
         track.banter_done = True
         track.save()
         return f"{track}: {e}"
+
+@shared_task
+def get_and_dither_image(url, instance, attribute):
+    """Expects a url, and a Django model cls with an ImageField attribute"""
+    print(f"Parsing {url} for {instance} with attribute {attribute}")
+    r = get(url)
+    print(r.content)
+    i = Image.open(BytesIO(r.content))
+    i = i.resize(size=(128, 128)).convert("P").quantize(colors=32)
+    buffer = BytesIO()
+    i.save(fp=buffer, format='PNG')
+    file = InMemoryUploadedFile(ContentFile(buffer.getvalue()), None, instance.name + ".png", "image/png", buffer.tell, "utf-8")
+    instance.image = file
+    instance.save()

playlist/templates/Vote.html

@@ -10,7 +10,9 @@ Stemmen
   {% if error %}<div class="error">{{ error }}</div>{% endif %}
   <div id="embed"></div>
   <div id="album">
-    {% if track.album.image_url %}
+    {% if track.album.image %}
+      <img src="{{track.album.image.url}}" />
+    {% elif track.album.image_url %}
       <img src="{{track.album.image_url}}" />
     {% else %}
       <img src="https://kagi.com/proxy/windows-95-logo-png-1.png?c=xjdP8sWN58YWflc6NcGN5ZvzREJyOwtrou-TSsaXxcx37J0VVJbSeycOcAptMJEUpzzvqmbKQ3JRuSmPN8HCK43OxjkRe_cQvncxVzlCblc%3D" />

playlist/views.py

@@ -7,7 +7,7 @@ import re
 from .models import Track, Artist, Album, Vote, Background, Profile
 from .utils import from_json, get_unvoted
 from . import spotify
-from .tasks import get_banter
+from .tasks import get_banter, get_and_dither_image
 
 spt = spotify.Spotify()
 
@@ -22,6 +22,8 @@ class AuthView(View):
 class VoteView(LoginRequiredMixin, View):
     def get(self, request, error=None):
         track = get_unvoted(request.user)
+        if not track.album.image:
+            get_and_dither_image(track.album.image_url, track.album, "image")
         return TemplateResponse(request, "Vote.html", {"track": track, "error": error})
     def post(self, request):
         try: