gukgjzkgjhgjh

backend/thirdparty/downloader/serializers.py

@@ -1,9 +1,110 @@
 from rest_framework import serializers
+from django.db.models import Count, Avg, Sum, Q
+from django.db.models.functions import TruncDay, TruncHour
+
+
+class DownloaderRecordSerializer(serializers.Serializer):
+    """Single download history entry."""
+    id = serializers.IntegerField()
+    url = serializers.URLField()
+    title = serializers.CharField()
+    platform = serializers.CharField()
+    format = serializers.CharField()
+    video_quality = serializers.IntegerField(allow_null=True)
+    is_audio_only = serializers.BooleanField()
+    length_of_media = serializers.IntegerField(allow_null=True)
+    file_size = serializers.IntegerField(allow_null=True)
+    processing_time = serializers.FloatField(allow_null=True)
+    success = serializers.BooleanField()
+    error_message = serializers.CharField()
+    download_time = serializers.DateTimeField()
+
+
+class PlatformCountSerializer(serializers.Serializer):
+    platform = serializers.CharField()
+    count = serializers.IntegerField()
+
+
+class QualityCountSerializer(serializers.Serializer):
+    video_quality = serializers.IntegerField(allow_null=True)
+    count = serializers.IntegerField()
+
+
+class TimeseriesPointSerializer(serializers.Serializer):
+    period = serializers.DateTimeField()
+    count = serializers.IntegerField()
+
+
+class TopUrlSerializer(serializers.Serializer):
+    url = serializers.URLField()
+    title = serializers.CharField()
+    count = serializers.IntegerField()
+
 
 class DownloaderStatsSerializer(serializers.Serializer):
+    # Totals
     total_downloads = serializers.IntegerField()
+    successful_downloads = serializers.IntegerField()
+    failed_downloads = serializers.IntegerField()
+    success_rate = serializers.FloatField(help_text="Percentage 0-100")
+
+    # Media metrics
     avg_length_of_media = serializers.FloatField(allow_null=True)
-    avg_file_size = serializers.FloatField(allow_null=True)
     total_length_of_media = serializers.IntegerField(allow_null=True)
+    avg_file_size = serializers.FloatField(allow_null=True)
     total_file_size = serializers.IntegerField(allow_null=True)
-    most_common_format = serializers.CharField(allow_null=True)
+    avg_processing_time = serializers.FloatField(allow_null=True)
+
+    # Format / quality breakdown
+    most_common_format = serializers.CharField(allow_null=True)
+    audio_only_count = serializers.IntegerField()
+    video_count = serializers.IntegerField()
+    downloads_by_platform = PlatformCountSerializer(many=True)
+    downloads_by_quality = QualityCountSerializer(many=True)
+
+    # Top content
+    most_downloaded_urls = TopUrlSerializer(many=True)
+
+    # Timeseries
+    downloads_per_day = TimeseriesPointSerializer(many=True)
+    downloads_per_hour = TimeseriesPointSerializer(many=True)
+
+    def to_representation(self, qs):
+        agg = qs.aggregate(
+            total_downloads=Count('id'),
+            successful_downloads=Count('id', filter=Q(success=True)),
+            failed_downloads=Count('id', filter=Q(success=False)),
+            avg_length_of_media=Avg('length_of_media'),
+            total_length_of_media=Sum('length_of_media'),
+            avg_file_size=Avg('file_size'),
+            total_file_size=Sum('file_size'),
+            avg_processing_time=Avg('processing_time'),
+            audio_only_count=Count('id', filter=Q(is_audio_only=True)),
+            video_count=Count('id', filter=Q(is_audio_only=False)),
+        )
+
+        total = agg['total_downloads'] or 0
+        agg['success_rate'] = round(agg['successful_downloads'] / total * 100, 2) if total else 0.0
+
+        most_common = qs.values('format').annotate(count=Count('id')).order_by('-count').first()
+        agg['most_common_format'] = most_common['format'] if most_common else None
+
+        agg['downloads_by_platform'] = list(
+            qs.values('platform').annotate(count=Count('id')).order_by('-count')
+        )
+        agg['downloads_by_quality'] = list(
+            qs.values('video_quality').annotate(count=Count('id')).order_by('-count')
+        )
+        agg['most_downloaded_urls'] = list(
+            qs.values('url', 'title').annotate(count=Count('id')).order_by('-count')[:10]
+        )
+        agg['downloads_per_day'] = list(
+            qs.annotate(period=TruncDay('download_time'))
+            .values('period').annotate(count=Count('id')).order_by('period')
+        )
+        agg['downloads_per_hour'] = list(
+            qs.annotate(period=TruncHour('download_time'))
+            .values('period').annotate(count=Count('id')).order_by('period')
+        )
+
+        return super().to_representation(agg)