refactor: split modules and harden scraping workflows

internal/service/emby_series_ids.go

@@ -0,0 +1,106 @@
+package service
+
+import (
+	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"path/filepath"
+	"sort"
+	"strconv"
+	"strings"
+
+	"github.com/ShukeBta/MediaStationGo/internal/model"
+)
+
+func (e *EmbyService) seriesIDForMedia(m *model.Media) string {
+	if strings.TrimSpace(m.SeriesID) != "" {
+		return m.SeriesID
+	}
+	return stableEmbyID(embyVirtualSeriesPrefix, m.LibraryID, e.seriesNameForMedia(m))
+}
+
+func (e *EmbyService) seasonIDForMedia(m *model.Media) string {
+	return seasonID(e.seriesIDForMedia(m), m.SeasonNum)
+}
+
+func (e *EmbyService) seriesNameForMedia(m *model.Media) string {
+	if strings.TrimSpace(m.SeriesID) != "" {
+		if series, err := e.repo.Series.FindByID(context.Background(), m.SeriesID); err == nil && series != nil && strings.TrimSpace(series.Title) != "" {
+			return series.Title
+		}
+	}
+	if name := inferSeriesNameFromPath(m.Path); name != "" {
+		return name
+	}
+	name := strings.TrimSpace(m.Title)
+	name = embyEpisodeTitleRE.ReplaceAllString(name, "")
+	name = embyYearSuffixRE.ReplaceAllString(name, "")
+	if name == "" {
+		name = strings.TrimSpace(m.OriginalName)
+	}
+	return name
+}
+
+func inferSeriesNameFromPath(path string) string {
+	path = strings.TrimSpace(path)
+	if path == "" {
+		return ""
+	}
+	dir := filepath.Dir(path)
+	base := filepath.Base(dir)
+	if embySeasonDirRE.MatchString(base) {
+		dir = filepath.Dir(dir)
+		base = filepath.Base(dir)
+	}
+	base = strings.TrimSpace(embyYearSuffixRE.ReplaceAllString(base, ""))
+	if base == "." || base == string(filepath.Separator) {
+		return ""
+	}
+	return base
+}
+
+func stableEmbyID(prefix string, parts ...string) string {
+	h := sha256.New()
+	for _, part := range parts {
+		_, _ = h.Write([]byte(strings.ToLower(strings.TrimSpace(part))))
+		_, _ = h.Write([]byte{0})
+	}
+	return prefix + hex.EncodeToString(h.Sum(nil))[:32]
+}
+
+func seasonID(seriesID string, seasonNum int) string {
+	if seasonNum < 0 {
+		seasonNum = 1
+	}
+	return stableEmbyID(embyVirtualSeasonPrefix, seriesID, strconv.Itoa(seasonNum))
+}
+
+func seasonName(seasonNum int) string {
+	if seasonNum == 0 {
+		return "特别篇"
+	}
+	if seasonNum < 0 {
+		seasonNum = 1
+	}
+	return fmt.Sprintf("第 %d 季", seasonNum)
+}
+
+func sortSeriesGroups(groups []embySeriesGroup, p ItemsParams) {
+	switch strings.ToLower(p.SortBy) {
+	case "sortname", "name":
+		sort.SliceStable(groups, func(i, j int) bool {
+			if strings.EqualFold(p.SortOrder, "Descending") {
+				return groups[i].Name > groups[j].Name
+			}
+			return groups[i].Name < groups[j].Name
+		})
+	default:
+		sort.SliceStable(groups, func(i, j int) bool {
+			if strings.EqualFold(p.SortOrder, "Ascending") {
+				return groups[i].CreatedAt.Before(groups[j].CreatedAt)
+			}
+			return groups[i].CreatedAt.After(groups[j].CreatedAt)
+		})
+	}
+}