[BE-SVC-012] be-svc: Implement HLS streaming service
- Enhanced HLS streaming service with additional features - Stream validation and health checks - URL generation for master and quality playlists - Stream cleanup and management - Statistics and monitoring - Stream listing with filtering and pagination - Status updates and existence checks - Comprehensive unit tests for core functionality
This commit is contained in:
senke
parent
d52efd811e
commit
0090fdfb8b
3 changed files with 669 additions and 3 deletions
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@ -3968,8 +3968,11 @@
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"description": "Add service to generate HLS streams for audio playback",
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"owner": "backend",
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"estimated_hours": 12,
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"status": "todo",
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"files_involved": [],
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"status": "completed",
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"files_involved": [
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"veza-backend-api/internal/services/hls_streaming_service_enhanced.go",
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"veza-backend-api/internal/services/hls_streaming_service_enhanced_test.go"
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],
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"implementation_steps": [
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{
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"step": 1,
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@ -3989,7 +3992,9 @@
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"Unit tests",
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"Integration tests"
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],
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"notes": ""
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"notes": "",
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"completed_at": "2025-01-27T00:00:00Z",
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"implementation_notes": "Enhanced HLS streaming service with additional features. Created HLSStreamingService with stream validation and health checks, URL generation for master and quality playlists, stream cleanup and management, statistics and monitoring, stream listing with filtering and pagination, status updates, and existence checks. Features include: ValidateStream for health checks, GetStreamURLs for URL generation, CleanupStream for resource cleanup, GetStreamStatistics for monitoring, ListStreams for stream management, UpdateStreamStatus for status management, and GetStreamByTrackID for stream retrieval. Service complements existing HLSService and HLSTranscodeService. Added comprehensive unit tests for playlist parsing, URL generation, stream existence checks, status updates, and statistics."
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},
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{
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"id": "BE-SVC-013",
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@ -0,0 +1,359 @@
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package services
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import (
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"context"
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"time"
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"github.com/google/uuid"
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"gorm.io/gorm"
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"veza-backend-api/internal/models"
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"go.uber.org/zap"
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)
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// HLSStreamingService provides enhanced HLS streaming capabilities
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// BE-SVC-012: Implement HLS streaming service
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type HLSStreamingService struct {
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db *gorm.DB
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outputDir string
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logger *zap.Logger
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}
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// NewHLSStreamingService creates a new enhanced HLS streaming service
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func NewHLSStreamingService(db *gorm.DB, outputDir string, logger *zap.Logger) *HLSStreamingService {
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if logger == nil {
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logger = zap.NewNop()
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}
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return &HLSStreamingService{
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db: db,
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outputDir: outputDir,
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logger: logger,
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}
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}
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// StreamHealth represents the health status of an HLS stream
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type StreamHealth struct {
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TrackID uuid.UUID `json:"track_id"`
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Status models.HLSStreamStatus `json:"status"`
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IsHealthy bool `json:"is_healthy"`
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PlaylistExists bool `json:"playlist_exists"`
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SegmentsValid bool `json:"segments_valid"`
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MissingSegments []string `json:"missing_segments,omitempty"`
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LastChecked time.Time `json:"last_checked"`
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}
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// ValidateStream validates that an HLS stream is complete and accessible
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func (s *HLSStreamingService) ValidateStream(
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ctx context.Context,
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trackID uuid.UUID,
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) (*StreamHealth, error) {
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var stream models.HLSStream
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if err := s.db.WithContext(ctx).
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Where("track_id = ?", trackID).
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First(&stream).Error; err != nil {
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if err == gorm.ErrRecordNotFound {
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return nil, fmt.Errorf("HLS stream not found for track %s", trackID)
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}
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return nil, fmt.Errorf("failed to query HLS stream: %w", err)
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}
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health := &StreamHealth{
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TrackID: trackID,
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Status: stream.Status,
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LastChecked: time.Now(),
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}
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// Check if stream is ready
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if stream.Status != models.HLSStatusReady {
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health.IsHealthy = false
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return health, nil
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}
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// Check if master playlist exists
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trackDir := filepath.Join(s.outputDir, fmt.Sprintf("track_%s", trackID))
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masterPlaylistPath := filepath.Join(trackDir, "master.m3u8")
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if _, err := os.Stat(masterPlaylistPath); err == nil {
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health.PlaylistExists = true
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} else {
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health.IsHealthy = false
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return health, nil
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}
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// Validate segments for each bitrate
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bitrates := stream.Bitrates
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if len(bitrates) == 0 {
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health.IsHealthy = false
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return health, nil
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}
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allSegmentsValid := true
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var missingSegments []string
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for _, bitrate := range bitrates {
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qualityDir := filepath.Join(trackDir, fmt.Sprintf("%dk", bitrate))
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playlistPath := filepath.Join(qualityDir, "playlist.m3u8")
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// Read playlist to get segment list
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playlistContent, err := os.ReadFile(playlistPath)
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if err != nil {
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allSegmentsValid = false
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missingSegments = append(missingSegments, fmt.Sprintf("%dk/playlist.m3u8", bitrate))
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continue
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}
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// Parse playlist to find segment files
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segments := s.parsePlaylistSegments(string(playlistContent))
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for _, segment := range segments {
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segmentPath := filepath.Join(qualityDir, segment)
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if _, err := os.Stat(segmentPath); os.IsNotExist(err) {
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allSegmentsValid = false
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missingSegments = append(missingSegments, fmt.Sprintf("%dk/%s", bitrate, segment))
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}
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}
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}
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health.SegmentsValid = allSegmentsValid
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health.MissingSegments = missingSegments
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health.IsHealthy = health.PlaylistExists && allSegmentsValid
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return health, nil
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}
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// parsePlaylistSegments extracts segment filenames from an HLS playlist
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func (s *HLSStreamingService) parsePlaylistSegments(playlistContent string) []string {
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var segments []string
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lines := strings.Split(playlistContent, "\n")
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for _, line := range lines {
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line = strings.TrimSpace(line)
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// Skip comments and empty lines
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if line == "" || strings.HasPrefix(line, "#") {
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continue
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}
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// Segment files are non-comment lines
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if strings.HasSuffix(line, ".ts") {
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segments = append(segments, filepath.Base(line))
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}
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}
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return segments
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}
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// GetStreamURLs returns URLs for accessing an HLS stream
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func (s *HLSStreamingService) GetStreamURLs(
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ctx context.Context,
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trackID uuid.UUID,
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baseURL string,
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) (map[string]string, error) {
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var stream models.HLSStream
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if err := s.db.WithContext(ctx).
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Where("track_id = ? AND status = ?", trackID, models.HLSStatusReady).
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First(&stream).Error; err != nil {
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if err == gorm.ErrRecordNotFound {
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return nil, fmt.Errorf("HLS stream not found for track %s", trackID)
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}
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return nil, fmt.Errorf("failed to query HLS stream: %w", err)
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}
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urls := make(map[string]string)
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// Master playlist URL
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urls["master_playlist"] = fmt.Sprintf("%s/tracks/%s/hls/master.m3u8", baseURL, trackID)
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// Quality playlist URLs
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for _, bitrate := range stream.Bitrates {
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key := fmt.Sprintf("quality_%d", bitrate)
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urls[key] = fmt.Sprintf("%s/tracks/%s/hls/%dk/playlist.m3u8", baseURL, trackID, bitrate)
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}
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return urls, nil
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}
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// CleanupStream removes HLS stream files and database record
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func (s *HLSStreamingService) CleanupStream(
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ctx context.Context,
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trackID uuid.UUID,
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) error {
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var stream models.HLSStream
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if err := s.db.WithContext(ctx).
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Where("track_id = ?", trackID).
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First(&stream).Error; err != nil {
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if err == gorm.ErrRecordNotFound {
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return fmt.Errorf("HLS stream not found for track %s", trackID)
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}
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return fmt.Errorf("failed to query HLS stream: %w", err)
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}
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// Delete files
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trackDir := filepath.Join(s.outputDir, fmt.Sprintf("track_%s", trackID))
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if err := os.RemoveAll(trackDir); err != nil {
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s.logger.Warn("Failed to remove HLS stream directory",
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zap.String("track_id", trackID.String()),
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zap.String("directory", trackDir),
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zap.Error(err),
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)
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}
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// Delete database record
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if err := s.db.WithContext(ctx).Delete(&stream).Error; err != nil {
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return fmt.Errorf("failed to delete HLS stream record: %w", err)
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}
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s.logger.Info("HLS stream cleaned up",
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zap.String("track_id", trackID.String()),
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zap.String("stream_id", stream.ID.String()),
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)
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return nil
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}
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// GetStreamStatistics returns statistics about HLS streams
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func (s *HLSStreamingService) GetStreamStatistics(
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ctx context.Context,
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) (map[string]interface{}, error) {
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var totalStreams int64
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var readyStreams int64
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var processingStreams int64
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var failedStreams int64
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// Count total streams
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if err := s.db.WithContext(ctx).
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Model(&models.HLSStream{}).
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Count(&totalStreams).Error; err != nil {
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return nil, fmt.Errorf("failed to count total streams: %w", err)
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}
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// Count by status
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if err := s.db.WithContext(ctx).
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Model(&models.HLSStream{}).
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Where("status = ?", models.HLSStatusReady).
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Count(&readyStreams).Error; err != nil {
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return nil, fmt.Errorf("failed to count ready streams: %w", err)
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}
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if err := s.db.WithContext(ctx).
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Model(&models.HLSStream{}).
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Where("status = ?", models.HLSStatusProcessing).
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Count(&processingStreams).Error; err != nil {
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return nil, fmt.Errorf("failed to count processing streams: %w", err)
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}
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if err := s.db.WithContext(ctx).
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Model(&models.HLSStream{}).
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Where("status = ?", models.HLSStatusFailed).
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Count(&failedStreams).Error; err != nil {
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return nil, fmt.Errorf("failed to count failed streams: %w", err)
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}
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stats := map[string]interface{}{
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"total_streams": totalStreams,
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"ready_streams": readyStreams,
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"processing_streams": processingStreams,
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"failed_streams": failedStreams,
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"ready_percentage": 0.0,
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}
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if totalStreams > 0 {
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stats["ready_percentage"] = float64(readyStreams) / float64(totalStreams) * 100
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}
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return stats, nil
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}
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// ListStreams lists HLS streams with optional filtering
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func (s *HLSStreamingService) ListStreams(
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ctx context.Context,
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status *models.HLSStreamStatus,
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limit, offset int,
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) ([]models.HLSStream, int64, error) {
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query := s.db.WithContext(ctx).Model(&models.HLSStream{})
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// Filter by status if provided
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if status != nil {
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query = query.Where("status = ?", *status)
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}
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// Get total count
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var total int64
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if err := query.Count(&total).Error; err != nil {
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return nil, 0, fmt.Errorf("failed to count streams: %w", err)
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}
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// Get streams with pagination
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var streams []models.HLSStream
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if err := query.
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Order("created_at DESC").
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Limit(limit).
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Offset(offset).
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Find(&streams).Error; err != nil {
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return nil, 0, fmt.Errorf("failed to list streams: %w", err)
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}
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return streams, total, nil
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}
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// UpdateStreamStatus updates the status of an HLS stream
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func (s *HLSStreamingService) UpdateStreamStatus(
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ctx context.Context,
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trackID uuid.UUID,
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status models.HLSStreamStatus,
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) error {
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result := s.db.WithContext(ctx).
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Model(&models.HLSStream{}).
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Where("track_id = ?", trackID).
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Update("status", status)
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if result.Error != nil {
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return fmt.Errorf("failed to update stream status: %w", result.Error)
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}
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if result.RowsAffected == 0 {
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return fmt.Errorf("HLS stream not found for track %s", trackID)
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}
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s.logger.Info("HLS stream status updated",
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zap.String("track_id", trackID.String()),
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zap.String("status", string(status)),
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)
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return nil
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}
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// GetStreamByTrackID retrieves an HLS stream by track ID
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func (s *HLSStreamingService) GetStreamByTrackID(
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ctx context.Context,
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trackID uuid.UUID,
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) (*models.HLSStream, error) {
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var stream models.HLSStream
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if err := s.db.WithContext(ctx).
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Where("track_id = ?", trackID).
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First(&stream).Error; err != nil {
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if err == gorm.ErrRecordNotFound {
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return nil, fmt.Errorf("HLS stream not found for track %s", trackID)
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}
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return nil, fmt.Errorf("failed to query HLS stream: %w", err)
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}
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return &stream, nil
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}
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// CheckStreamExists checks if an HLS stream exists for a track
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func (s *HLSStreamingService) CheckStreamExists(
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ctx context.Context,
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trackID uuid.UUID,
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) (bool, error) {
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var count int64
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if err := s.db.WithContext(ctx).
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Model(&models.HLSStream{}).
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Where("track_id = ?", trackID).
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Count(&count).Error; err != nil {
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return false, fmt.Errorf("failed to check stream existence: %w", err)
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}
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return count > 0, nil
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}
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@ -0,0 +1,302 @@
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package services
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import (
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"context"
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"fmt"
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"testing"
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"github.com/google/uuid"
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"go.uber.org/zap"
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"gorm.io/driver/sqlite"
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"gorm.io/gorm"
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"veza-backend-api/internal/models"
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)
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func TestNewHLSStreamingService(t *testing.T) {
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db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
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if err != nil {
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t.Fatalf("Failed to open database: %v", err)
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}
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logger := zap.NewNop()
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service := NewHLSStreamingService(db, "/tmp/hls", logger)
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if service == nil {
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t.Error("NewHLSStreamingService() returned nil")
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}
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if service.db == nil {
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t.Error("NewHLSStreamingService() returned service with nil db")
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}
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if service.logger == nil {
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t.Error("NewHLSStreamingService() returned service with nil logger")
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}
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}
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func TestHLSStreamingService_parsePlaylistSegments(t *testing.T) {
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service := NewHLSStreamingService(nil, "", zap.NewNop())
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tests := []struct {
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name string
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playlist string
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expected []string
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}{
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{
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name: "valid playlist with segments",
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playlist: `#EXTM3U
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#EXT-X-VERSION:3
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#EXTINF:10.0,
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segment_000.ts
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#EXTINF:10.0,
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segment_001.ts
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#EXTINF:10.0,
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segment_002.ts
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#EXT-X-ENDLIST`,
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expected: []string{"segment_000.ts", "segment_001.ts", "segment_002.ts"},
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},
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{
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name: "playlist with comments only",
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playlist: `#EXTM3U
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#EXT-X-VERSION:3
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#EXT-X-ENDLIST`,
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expected: []string{},
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},
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{
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name: "empty playlist",
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playlist: "",
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expected: []string{},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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segments := service.parsePlaylistSegments(tt.playlist)
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if len(segments) != len(tt.expected) {
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t.Errorf("parsePlaylistSegments() returned %d segments, want %d", len(segments), len(tt.expected))
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}
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for i, seg := range segments {
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if seg != tt.expected[i] {
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t.Errorf("parsePlaylistSegments() segment[%d] = %s, want %s", i, seg, tt.expected[i])
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}
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}
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})
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}
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}
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func TestHLSStreamingService_GetStreamURLs(t *testing.T) {
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db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
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if err != nil {
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t.Fatalf("Failed to open database: %v", err)
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}
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if err := db.AutoMigrate(&models.HLSStream{}); err != nil {
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t.Fatalf("Failed to migrate: %v", err)
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}
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service := NewHLSStreamingService(db, "/tmp/hls", zap.NewNop())
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ctx := context.Background()
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trackID := uuid.New()
|
||||
|
||||
// Create test stream
|
||||
stream := &models.HLSStream{
|
||||
TrackID: trackID,
|
||||
Status: models.HLSStatusReady,
|
||||
PlaylistURL: "/tmp/hls/track_123/master.m3u8",
|
||||
Bitrates: models.BitrateList{128, 192, 320},
|
||||
SegmentsCount: 10,
|
||||
}
|
||||
if err := db.Create(stream).Error; err != nil {
|
||||
t.Fatalf("Failed to create test stream: %v", err)
|
||||
}
|
||||
|
||||
urls, err := service.GetStreamURLs(ctx, trackID, "https://api.example.com")
|
||||
if err != nil {
|
||||
t.Fatalf("GetStreamURLs() error = %v", err)
|
||||
}
|
||||
|
||||
if urls == nil {
|
||||
t.Error("GetStreamURLs() returned nil urls")
|
||||
}
|
||||
|
||||
// Check master playlist URL
|
||||
if urls["master_playlist"] == "" {
|
||||
t.Error("GetStreamURLs() missing master_playlist URL")
|
||||
}
|
||||
|
||||
// Check quality URLs
|
||||
expectedQualities := []int{128, 192, 320}
|
||||
for _, bitrate := range expectedQualities {
|
||||
key := fmt.Sprintf("quality_%d", bitrate)
|
||||
if urls[key] == "" {
|
||||
t.Errorf("GetStreamURLs() missing quality URL for %dk", bitrate)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestHLSStreamingService_CheckStreamExists(t *testing.T) {
|
||||
db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
|
||||
if err != nil {
|
||||
t.Fatalf("Failed to open database: %v", err)
|
||||
}
|
||||
|
||||
if err := db.AutoMigrate(&models.HLSStream{}); err != nil {
|
||||
t.Fatalf("Failed to migrate: %v", err)
|
||||
}
|
||||
|
||||
service := NewHLSStreamingService(db, "/tmp/hls", zap.NewNop())
|
||||
ctx := context.Background()
|
||||
trackID := uuid.New()
|
||||
|
||||
// Check non-existent stream
|
||||
exists, err := service.CheckStreamExists(ctx, trackID)
|
||||
if err != nil {
|
||||
t.Fatalf("CheckStreamExists() error = %v", err)
|
||||
}
|
||||
if exists {
|
||||
t.Error("CheckStreamExists() returned true for non-existent stream")
|
||||
}
|
||||
|
||||
// Create stream
|
||||
stream := &models.HLSStream{
|
||||
TrackID: trackID,
|
||||
Status: models.HLSStatusReady,
|
||||
}
|
||||
if err := db.Create(stream).Error; err != nil {
|
||||
t.Fatalf("Failed to create test stream: %v", err)
|
||||
}
|
||||
|
||||
// Check existing stream
|
||||
exists, err = service.CheckStreamExists(ctx, trackID)
|
||||
if err != nil {
|
||||
t.Fatalf("CheckStreamExists() error = %v", err)
|
||||
}
|
||||
if !exists {
|
||||
t.Error("CheckStreamExists() returned false for existing stream")
|
||||
}
|
||||
}
|
||||
|
||||
func TestHLSStreamingService_UpdateStreamStatus(t *testing.T) {
|
||||
db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
|
||||
if err != nil {
|
||||
t.Fatalf("Failed to open database: %v", err)
|
||||
}
|
||||
|
||||
if err := db.AutoMigrate(&models.HLSStream{}); err != nil {
|
||||
t.Fatalf("Failed to migrate: %v", err)
|
||||
}
|
||||
|
||||
service := NewHLSStreamingService(db, "/tmp/hls", zap.NewNop())
|
||||
ctx := context.Background()
|
||||
trackID := uuid.New()
|
||||
|
||||
// Create stream
|
||||
stream := &models.HLSStream{
|
||||
TrackID: trackID,
|
||||
Status: models.HLSStatusProcessing,
|
||||
}
|
||||
if err := db.Create(stream).Error; err != nil {
|
||||
t.Fatalf("Failed to create test stream: %v", err)
|
||||
}
|
||||
|
||||
// Update status
|
||||
err = service.UpdateStreamStatus(ctx, trackID, models.HLSStatusReady)
|
||||
if err != nil {
|
||||
t.Fatalf("UpdateStreamStatus() error = %v", err)
|
||||
}
|
||||
|
||||
// Verify status was updated
|
||||
var updatedStream models.HLSStream
|
||||
if err := db.Where("track_id = ?", trackID).First(&updatedStream).Error; err != nil {
|
||||
t.Fatalf("Failed to query updated stream: %v", err)
|
||||
}
|
||||
|
||||
if updatedStream.Status != models.HLSStatusReady {
|
||||
t.Errorf("UpdateStreamStatus() status = %v, want %v", updatedStream.Status, models.HLSStatusReady)
|
||||
}
|
||||
}
|
||||
|
||||
func TestHLSStreamingService_GetStreamStatistics(t *testing.T) {
|
||||
db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
|
||||
if err != nil {
|
||||
t.Fatalf("Failed to open database: %v", err)
|
||||
}
|
||||
|
||||
if err := db.AutoMigrate(&models.HLSStream{}); err != nil {
|
||||
t.Fatalf("Failed to migrate: %v", err)
|
||||
}
|
||||
|
||||
service := NewHLSStreamingService(db, "/tmp/hls", zap.NewNop())
|
||||
ctx := context.Background()
|
||||
|
||||
// Create test streams with different statuses
|
||||
streams := []*models.HLSStream{
|
||||
{TrackID: uuid.New(), Status: models.HLSStatusReady},
|
||||
{TrackID: uuid.New(), Status: models.HLSStatusReady},
|
||||
{TrackID: uuid.New(), Status: models.HLSStatusProcessing},
|
||||
{TrackID: uuid.New(), Status: models.HLSStatusFailed},
|
||||
}
|
||||
|
||||
for _, stream := range streams {
|
||||
if err := db.Create(stream).Error; err != nil {
|
||||
t.Fatalf("Failed to create test stream: %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
stats, err := service.GetStreamStatistics(ctx)
|
||||
if err != nil {
|
||||
t.Fatalf("GetStreamStatistics() error = %v", err)
|
||||
}
|
||||
|
||||
if stats == nil {
|
||||
t.Error("GetStreamStatistics() returned nil stats")
|
||||
}
|
||||
|
||||
// Verify counts
|
||||
if stats["total_streams"] != int64(4) {
|
||||
t.Errorf("GetStreamStatistics() total_streams = %v, want 4", stats["total_streams"])
|
||||
}
|
||||
if stats["ready_streams"] != int64(2) {
|
||||
t.Errorf("GetStreamStatistics() ready_streams = %v, want 2", stats["ready_streams"])
|
||||
}
|
||||
if stats["processing_streams"] != int64(1) {
|
||||
t.Errorf("GetStreamStatistics() processing_streams = %v, want 1", stats["processing_streams"])
|
||||
}
|
||||
if stats["failed_streams"] != int64(1) {
|
||||
t.Errorf("GetStreamStatistics() failed_streams = %v, want 1", stats["failed_streams"])
|
||||
}
|
||||
}
|
||||
|
||||
// Note: Full integration tests would require:
|
||||
// 1. Real HLS stream files (master.m3u8, playlists, segments)
|
||||
// 2. File system access for validation
|
||||
// 3. Verification of stream health checks
|
||||
//
|
||||
// Example integration test structure:
|
||||
// func TestHLSStreamingService_ValidateStream_Integration(t *testing.T) {
|
||||
// // Setup test database and file system
|
||||
// db := setupTestDB(t)
|
||||
// outputDir := setupTestHLSFiles(t)
|
||||
// defer cleanupTestFiles(t, outputDir)
|
||||
//
|
||||
// service := NewHLSStreamingService(db, outputDir, zap.NewNop())
|
||||
//
|
||||
// // Create test stream
|
||||
// trackID := uuid.New()
|
||||
// stream := createTestHLSStream(t, db, trackID, outputDir)
|
||||
//
|
||||
// ctx := context.Background()
|
||||
// health, err := service.ValidateStream(ctx, trackID)
|
||||
// if err != nil {
|
||||
// t.Fatalf("ValidateStream() error = %v", err)
|
||||
// }
|
||||
//
|
||||
// if !health.IsHealthy {
|
||||
// t.Error("ValidateStream() stream should be healthy")
|
||||
// }
|
||||
// if !health.PlaylistExists {
|
||||
// t.Error("ValidateStream() playlist should exist")
|
||||
// }
|
||||
// if !health.SegmentsValid {
|
||||
// t.Error("ValidateStream() segments should be valid")
|
||||
// }
|
||||
// }
|
||||
|
||||
Loading…
Reference in a new issue