refactor: Relocate ride services from services.py to services_core.py and refine admin display fields.

backend/apps/moderation/serializers.py

@@ -21,6 +21,7 @@ from .models import (
     ModerationQueue,
     ModerationAction,
     BulkOperation,
+    EditSubmission,
 )
 
 User = get_user_model()
@@ -60,6 +61,137 @@ class ContentTypeSerializer(serializers.ModelSerializer):
 # ============================================================================
 
 
+class EditSubmissionSerializer(serializers.ModelSerializer):
+    """Serializer for EditSubmission with UI metadata for Nuxt frontend."""
+
+    submitted_by = UserBasicSerializer(source="user", read_only=True)
+    content_type_name = serializers.CharField(
+        source="content_type.model", read_only=True
+    )
+
+    # UI Metadata fields for Nuxt rendering
+    status_color = serializers.SerializerMethodField()
+    status_icon = serializers.SerializerMethodField()
+    status_display = serializers.CharField(source="get_status_display", read_only=True)
+    time_since_created = serializers.SerializerMethodField()
+
+    class Meta:
+        model = EditSubmission
+        fields = [
+            "id",
+            "status",
+            "status_display",
+            "status_color",
+            "status_icon",
+            "content_type",
+            "content_type_name",
+            "object_id",
+            "changes",
+            "moderator_changes",
+            "rejection_reason",
+            "submitted_by",
+            "reviewed_by",
+            "created_at",
+            "updated_at",
+            "time_since_created",
+        ]
+        read_only_fields = [
+            "id",
+            "created_at",
+            "updated_at",
+            "submitted_by",
+            "status_color",
+            "status_icon",
+            "status_display",
+            "content_type_name",
+            "time_since_created",
+        ]
+
+    def get_status_color(self, obj) -> str:
+        """Return hex color based on status for UI badges."""
+        colors = {
+            "PENDING": "#f59e0b",    # Amber
+            "APPROVED": "#10b981",   # Emerald
+            "REJECTED": "#ef4444",   # Red
+            "ESCALATED": "#8b5cf6",  # Violet
+        }
+        return colors.get(obj.status, "#6b7280")  # Default gray
+
+    def get_status_icon(self, obj) -> str:
+        """Return Heroicons icon name based on status."""
+        icons = {
+            "PENDING": "heroicons:clock",
+            "APPROVED": "heroicons:check-circle",
+            "REJECTED": "heroicons:x-circle",
+            "ESCALATED": "heroicons:arrow-up-circle",
+        }
+        return icons.get(obj.status, "heroicons:question-mark-circle")
+
+    def get_time_since_created(self, obj) -> str:
+        """Human-readable time since creation."""
+        now = timezone.now()
+        diff = now - obj.created_at
+
+        if diff.days > 0:
+            return f"{diff.days} days ago"
+        elif diff.seconds > 3600:
+            hours = diff.seconds // 3600
+            return f"{hours} hours ago"
+        else:
+            minutes = diff.seconds // 60
+            return f"{minutes} minutes ago"
+
+
+class EditSubmissionListSerializer(serializers.ModelSerializer):
+    """Optimized serializer for EditSubmission lists."""
+
+    submitted_by_username = serializers.CharField(
+        source="user.username", read_only=True
+    )
+    content_type_name = serializers.CharField(
+        source="content_type.model", read_only=True
+    )
+    status_color = serializers.SerializerMethodField()
+    status_icon = serializers.SerializerMethodField()
+
+    class Meta:
+        model = EditSubmission
+        fields = [
+            "id",
+            "status",
+            "content_type_name",
+            "object_id",
+            "submitted_by_username",
+            "status_color",
+            "status_icon",
+            "created_at",
+        ]
+        read_only_fields = fields
+
+    def get_status_color(self, obj) -> str:
+        colors = {
+            "PENDING": "#f59e0b",
+            "APPROVED": "#10b981",
+            "REJECTED": "#ef4444",
+            "ESCALATED": "#8b5cf6",
+        }
+        return colors.get(obj.status, "#6b7280")
+
+    def get_status_icon(self, obj) -> str:
+        icons = {
+            "PENDING": "heroicons:clock",
+            "APPROVED": "heroicons:check-circle",
+            "REJECTED": "heroicons:x-circle",
+            "ESCALATED": "heroicons:arrow-up-circle",
+        }
+        return icons.get(obj.status, "heroicons:question-mark-circle")
+
+
+# ============================================================================
+# Moderation Report Serializers
+# ============================================================================
+
+
 class ModerationReportSerializer(serializers.ModelSerializer):
     """Full moderation report serializer with all details."""