feat: author emergent situations and dialogue

simulation/situations/SituationAlternativeDefinition.gd

@@ -17,12 +17,27 @@ func validate() -> Array[String]:
 		errors.append("display_name is empty for alternative '%s'" % alternative_id)
 	if resolution_predicate_ids.is_empty():
 		errors.append("alternative '%s' has no resolution predicates" % alternative_id)
+	var seen_predicate_ids := {}
 	for predicate_id in resolution_predicate_ids:
 		if predicate_id.is_empty():
 			errors.append("alternative '%s' has an empty resolution predicate ID" % alternative_id)
+		elif seen_predicate_ids.has(predicate_id):
+			errors.append(
+				(
+					"alternative '%s' has duplicate resolution predicate '%s'"
+					% [alternative_id, predicate_id]
+				)
+			)
+		seen_predicate_ids[predicate_id] = true
+	var seen_topic_ids := {}
 	for topic_id in dialogue_topic_ids:
 		if topic_id.is_empty():
 			errors.append("alternative '%s' has an empty dialogue topic ID" % alternative_id)
+		elif seen_topic_ids.has(topic_id):
+			errors.append(
+				"alternative '%s' has duplicate dialogue topic '%s'" % [alternative_id, topic_id]
+			)
+		seen_topic_ids[topic_id] = true
 	for term_key in commitment_terms:
 		if not term_key is String and not term_key is StringName:
 			errors.append("alternative '%s' has a non-string commitment term key" % alternative_id)