Use the local database to determine related anime.

This means that unmatched shows won't show up as related to matched ones
any more, but it also means we won't get false-positive relation matches
on, for instance, the page for Speed Racer. Instead, it'll point you at
Yatterman, which will then point you at Time Bokan.

nkdsu/apps/vote/anime.py

@@ -1,7 +1,9 @@
+from __future__ import annotations
+
 import hashlib
 import os
 from itertools import chain
-from typing import Literal, Optional
+from typing import Iterable, Literal, Optional
 from urllib.parse import urlparse
 
 from django.conf import settings
@@ -36,6 +38,7 @@ class Anime(BaseModel):
     thumbnail: str
     synonyms: list[str]
     sources: list[str]
+    relations: list[str]
     anime_season: Season
     type: Literal['MOVIE', 'ONA', 'OVA', 'SPECIAL', 'TV', 'UNKNOWN']
 
@@ -78,6 +81,19 @@ def urls(self) -> list[tuple[str, str]]:
             key=lambda u: u[0],
         )
 
+    def related_anime(self) -> Iterable[str]:
+        from .models import Track
+
+        return (
+            title
+            for title, anime in (
+                (anime_title, get_anime(anime_title))
+                for anime_title in Track.all_anime_titles()
+            )
+            if anime is not None
+            and any((source in self.relations for source in anime.sources))
+        )
+
 
 by_title: dict[str, Anime] = {}
 by_synonym: dict[str, Anime] = {}

nkdsu/apps/vote/views/__init__.py

@@ -31,7 +31,7 @@
 )
 
 from nkdsu.mixins import MarkdownView
-from ..anime import suggest_anime
+from ..anime import get_anime, suggest_anime
 from ..forms import BadMetadataForm, DarkModeForm, RequestForm, VoteForm
 from ..models import (
     Profile,
@@ -530,14 +530,19 @@ def get_context_data(self, **kwargs) -> dict[str, Any]:
             ),
             key=lambda rt: rt[0],
         )
+        anime_data = get_anime(self.kwargs['anime'])
+        related_anime = (
+            list(anime_data.related_anime())
+            if anime_data is not None
+            else context['tracks'][0]
+            .role_details_for_anime(self.kwargs['anime'])[0]
+            .related_anime
+        )
         context.update({
             'anime': self.kwargs['anime'],
             'role_tracks': role_tracks,
-            'related_anime': (
-                context['tracks'][0]
-                .role_details_for_anime(self.kwargs['anime'])[0]
-                .related_anime
-            ),
+            'anime_data': anime_data,
+            'related_anime': related_anime,
         })
         return context
 

nkdsu/templates/anime_detail.html

@@ -11,38 +11,20 @@
 
 {% block content %}
 
-  {% with anime|anime as anime_detail %}
-    {% if anime_detail %}
-      <div class="anime-detail-header">
-        <img class="anime-picture" src="{% url "vote:anime-picture" anime=anime %}" alt=""/>
-
-        <div class="detail">
-          <h2>{{ anime }}</h2>
-          {% include "include/anime.html" with anime=anime_detail %}
-          {% if related_anime %}
-            {# replace this to use the relations from the offline db #}
-            <p class="related-anime">
-              related anime:
-              {% for anime in related_anime %}
-                <a href="{% url "vote:anime" anime=anime %}">{{ anime }}</a>{% if not forloop.last %},{% endif %}
-              {% endfor %}
-            </p>
-          {% endif %}
-        </div>
+  {% if anime_data %}
+    <div class="anime-detail-header">
+      <img class="anime-picture" src="{% url "vote:anime-picture" anime=anime %}" alt=""/>
+
+      <div class="detail">
+        <h2>{{ anime }}</h2>
+        {% include "include/anime.html" with anime=anime_data %}
+        {% include "include/related_anime.html" %}
       </div>
-    {% else %}
-      <h2>{{ anime }}</h2>
-
-      {% if related_anime %}
-        <p class="related-anime">
-          related anime:
-          {% for anime in related_anime %}
-            <a href="{% url "vote:anime" anime=anime %}">{{ anime }}</a>{% if not forloop.last %},{% endif %}
-          {% endfor %}
-        </p>
-      {% endif %}
-    {% endif %}
-  {% endwith %}
+    </div>
+  {% else %}
+    <h2>{{ anime }}</h2>
+    {% include "include/related_anime.html" %}
+  {% endif %}
 
   {% regroup role_tracks by 0.plural as roles %}
 

nkdsu/templates/include/related_anime.html

@@ -0,0 +1,8 @@
+{% if related_anime %}
+  <p class="related-anime">
+    related anime:
+    {% for anime in related_anime %}
+      <a href="{% url "vote:anime" anime=anime %}">{{ anime }}</a>{% if not forloop.last %},{% endif %}
+    {% endfor %}
+  </p>
+{% endif %}