Add tags to public schedule and session view (#158)

* add tag in talk view detail
* show tags on schedule and session view
* move tag to above track and room

---------

Co-authored-by: lcduong <[email protected]>

src/pretalx/agenda/templates/agenda/talk.html

@@ -133,6 +133,11 @@ <h3 class="talk-title">
             <section>
                 {% html_signal "pretalx.agenda.signals.html_below_session_pages" sender=request.event request=request submission=submission %}
             </section>
+            {% if submission_tags %}
+              {% for tag_item in submission_tags %}
+                  <span class="submission_tag" onclick="#" style="background-color: {{ tag_item.color }}; color: {{ tag_item.contrast_color }};">{{ tag_item.tag }}</span>
+              {% endfor %}
+            {% endif %}
         </div>
     </div>
     {% if not hide_speaker_links %}

src/pretalx/agenda/views/talk.py

@@ -53,6 +53,16 @@ def submission(self):
     def get_permission_object(self):
         return self.submission
 
+    def get_contrast_color(self, bg_color):
+        if not bg_color:
+            return ''
+        bg_color = bg_color.lstrip('#')
+        r = int(bg_color[0:2], 16)
+        g = int(bg_color[2:4], 16)
+        b = int(bg_color[4:6], 16)
+        brightness = (r * 299 + g * 587 + b * 114) / 1000
+        return 'black' if brightness > 128 else 'white'
+
     @cached_property
     def recording(self):
         for __, response in register_recording_provider.send_robust(self.request.event):
@@ -93,6 +103,9 @@ def get_context_data(self, **kwargs):
             .order_by("start")
             .select_related("room")
         )
+        ctx["submission_tags"] = self.submission.tags.all()
+        for tag_item in ctx['submission_tags']:
+            tag_item.contrast_color = self.get_contrast_color(tag_item.color)
         result = []
         other_slots = (
             schedule.talks.exclude(submission_id=self.submission.pk).filter(

src/pretalx/schedule/models/schedule.py

@@ -668,7 +668,8 @@ def build_data(self, all_talks=False, filter_updated=None, all_rooms=False):
                         "updated": talk.updated.isoformat(),
                         "state": talk.submission.state if all_talks else None,
                         "fav_count": count_fav_talk(talk.submission.code) if talk.submission else 0,
-                        "do_not_record": talk.submission.do_not_record
+                        "do_not_record": talk.submission.do_not_record,
+                        "tags": talk.submission.get_tag()
                     }
                 )
             else:

src/pretalx/static/agenda/scss/_speaker.scss

@@ -52,6 +52,9 @@
         max-width: 100%;
       }
     }
+    .submission_tag {
+        padding: 0px 5px;
+    }
   }
 }
 

src/pretalx/submission/models/submission.py

@@ -337,6 +337,16 @@ def get_duration(self) -> int:
             return self.submission_type.default_duration
         return self.duration
 
+    def get_tag(self):
+        tags = []
+        for tag in self.tags.all():
+            tags.append({
+                'id': tag.id,
+                'tag': tag.tag,
+                'color': tag.color
+            })
+        return tags
+
     def update_duration(self):
         """Apply the submission's duration to its currently scheduled.