feat [api]: format tags and filters

server/myapi/templates/bocal.tex

@@ -1,13 +1,15 @@
+{% load film_tags %}
+
 \centerline{\date{% templatetag openbrace %}{{ film.projection_date|date:"l d F Y" }}, {{ film.projection_date|time:"H\hi" }}}
 \centerline{Salle Dussane}
 \centerline{\emph{\Large {{ film.title }}}}
 \centerline{% templatetag openbrace %}{{ film.director }} ({{ film.release_year }})}
 \medskip
-\centerline{% templatetag openbrace %}{{ film.actors }}}
+\centerline{% templatetag openbrace %}{% list_actors film.actors %}}
 \medskip
 \centerline{% templatetag openbrace %}{{ film.movie_format }} . {{ film.language_subtitles }}}
 \medskip
-\centerline{\textit{% templatetag openbrace %}{{ film.duration }} minutes}}
+\centerline{\textit{% templatetag openbrace %}{{ film.duration|movie_duration }}}}
 
 \medskip
 \medskip

server/myapi/templatetags/film_tags.py

@@ -0,0 +1,27 @@
+from datetime import timedelta
+from django import template
+from typing import List
+from django.utils.safestring import mark_safe
+
+register = template.Library()
+
+
+@register.simple_tag
+def color_display(in_color: bool) -> str:
+    res = "Couleur" if in_color else "Noir & Blanc"
+    return mark_safe(res)
+
+
+@register.simple_tag
+def list_actors(actors: List[str]) -> str:
+    res = ", ".join(actors[:3])
+    if len(actors) > 3:
+        res += "..."
+    return res
+
+
+@register.filter
+def movie_duration(value: timedelta) -> str:
+    s = value.total_seconds()
+    str_duration = f"{int(s // 3600):01d}h{int(s % 3600 // 60):02d}"
+    return mark_safe(str_duration)