Various fixes

folkugat_web/model/sessions.py

@@ -6,13 +6,13 @@ DEFAULT_START_TIME = datetime.time(20, 30)
 DEFAULT_END_TIME = datetime.time(22, 30)
 
 
-@dataclasses.dataclass
+@dataclasses.dataclass(frozen=True)
 class SessionVenue:
     name: str | None = None
     url: str | None = None
 
 
-@dataclasses.dataclass
+@dataclasses.dataclass(frozen=True)
 class Session:
     id: int | None = None
     date: datetime.date = dataclasses.field(default_factory=datetime.date.today)

folkugat_web/model/temes.py

@@ -133,6 +133,19 @@ class Tema:
         result = next(filter(lambda prop: prop.field is PropertyField.ORIGEN, self.properties), None)
         return result.value if result else None
 
+    @property
+    def has_score(self) -> bool:
+        return bool(self.main_score())
+
+    @property
+    def has_audio(self) -> bool:
+        audio_links = filter(lambda l: l.content_type is ContentType.AUDIO, self.links)
+        return any(audio_links)
+
+    @property
+    def has_lyrics(self) -> bool:
+        return bool(self.lyrics)
+
 
 class TemaCols(enum.Enum):
     NOM = "nom"