mirror of
https://github.com/truewhile/MeBox.git
synced 2026-09-28 11:16:37 +08:00
truewhile
259 lines
7.4 KiB
Go
259 lines
7.4 KiB
Go
package service
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import (
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"sort"
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"strings"
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"time"
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"github.com/truewhile/MeBox/internal/model"
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)
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// MediaSortSpec is the normalized sort request shared by media and series endpoints.
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type MediaSortSpec struct {
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Field string
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Order string
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}
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// NormalizeMediaSort validates the request against the same fields the web UI
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// exposes. Unknown values fall back to the historical release-date ordering.
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func NormalizeMediaSort(field, order string) MediaSortSpec {
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field = strings.ToLower(strings.TrimSpace(field))
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switch field {
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case "title", "release_date", "year", "created_at", "updated_at", "rating", "duration", "bitrate", "last_played", "random":
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case "imdb_rating":
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field = "rating"
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default:
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field = "release_date"
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}
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order = strings.ToLower(strings.TrimSpace(order))
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if order != "asc" && order != "desc" {
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if field == "title" {
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order = "asc"
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} else {
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order = "desc"
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}
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}
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if field == "random" {
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// The web client shuffles the complete result so pagination stays stable.
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field = "release_date"
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order = "desc"
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}
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return MediaSortSpec{Field: field, Order: order}
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}
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// SortMediaItems returns a sorted copy of the grouped media list. The input is
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// often backed by an immutable runtime cache, so callers must not rely on the
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// returned slice aliasing it.
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func SortMediaItems(items []MediaItem, field, order string, history map[string]time.Time) []MediaItem {
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spec := NormalizeMediaSort(field, order)
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out := append([]MediaItem(nil), items...)
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if len(out) < 2 {
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return out
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}
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sort.SliceStable(out, func(i, j int) bool {
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cmp := compareMediaByField(out[i], out[j], spec, history)
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if cmp == 0 {
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cmp = compareID(out[i].ID, out[j].ID)
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}
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return cmp < 0
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})
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return out
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}
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// SortSeriesCards returns a sorted copy of series cards.
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func SortSeriesCards(cards []SeriesCard, field, order string, history map[string]time.Time) []SeriesCard {
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spec := NormalizeMediaSort(field, order)
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out := append([]SeriesCard(nil), cards...)
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if len(out) < 2 {
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return out
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}
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sort.SliceStable(out, func(i, j int) bool {
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cmp := compareSeriesByField(out[i], out[j], spec, history)
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// updated_at 表示最后一集添加日期。远程卡片可能没有该字段，此时
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// 保持调用方给定的顺序，不要用 ID 再次打乱。
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if cmp == 0 && spec.Field != "updated_at" {
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cmp = compareID(out[i].Key, out[j].Key)
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}
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return cmp < 0
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})
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return out
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}
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func compareMediaByField(a, b MediaItem, spec MediaSortSpec, history map[string]time.Time) int {
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switch spec.Field {
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case "title":
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ta, tb := mediaSortTitle(a.Media), mediaSortTitle(b.Media)
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return compareOrdered(strings.Compare(strings.ToLower(strings.TrimSpace(ta)), strings.ToLower(strings.TrimSpace(tb))), strings.TrimSpace(ta) != "", strings.TrimSpace(tb) != "", spec.Order)
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case "release_date":
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ta, oka := mediaReleaseTime(a.Media)
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tb, okb := mediaReleaseTime(b.Media)
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return compareOrdered(compareTime(ta, tb), oka, okb, spec.Order)
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case "year":
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return compareOrdered(compareInt(a.Year, b.Year), true, true, spec.Order)
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case "created_at":
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return compareOrdered(compareTime(a.CreatedAt, b.CreatedAt), !a.CreatedAt.IsZero(), !b.CreatedAt.IsZero(), spec.Order)
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case "updated_at":
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ta, oka := mediaUpdatedTime(a.Media)
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tb, okb := mediaUpdatedTime(b.Media)
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return compareOrdered(compareTime(ta, tb), oka, okb, spec.Order)
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case "rating":
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return compareOrdered(compareFloat(float64(a.Rating), float64(b.Rating)), true, true, spec.Order)
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case "duration":
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return compareOrdered(compareInt(a.DurationSec, b.DurationSec), true, true, spec.Order)
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case "bitrate":
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return compareOrdered(compareInt64(a.SizeBytes, b.SizeBytes), true, true, spec.Order)
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case "last_played":
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ta, oka := mediaItemLastPlayedTime(a, history)
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tb, okb := mediaItemLastPlayedTime(b, history)
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return compareOrdered(compareTime(ta, tb), oka, okb, spec.Order)
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default:
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return 0
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}
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}
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func compareSeriesByField(a, b SeriesCard, spec MediaSortSpec, history map[string]time.Time) int {
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switch spec.Field {
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case "title":
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return compareOrdered(strings.Compare(strings.ToLower(strings.TrimSpace(mediaSortTitle(a.Rep))), strings.ToLower(strings.TrimSpace(mediaSortTitle(b.Rep)))), strings.TrimSpace(mediaSortTitle(a.Rep)) != "", strings.TrimSpace(mediaSortTitle(b.Rep)) != "", spec.Order)
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case "release_date":
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ta, oka := mediaReleaseTime(a.Rep)
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tb, okb := mediaReleaseTime(b.Rep)
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return compareOrdered(compareTime(ta, tb), oka, okb, spec.Order)
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case "year":
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return compareOrdered(compareInt(a.Rep.Year, b.Rep.Year), true, true, spec.Order)
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case "created_at":
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return compareOrdered(compareTime(a.Rep.CreatedAt, b.Rep.CreatedAt), !a.Rep.CreatedAt.IsZero(), !b.Rep.CreatedAt.IsZero(), spec.Order)
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case "updated_at":
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ta, oka := seriesUpdatedTime(a)
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tb, okb := seriesUpdatedTime(b)
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return compareOrdered(compareTime(ta, tb), oka, okb, spec.Order)
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case "rating":
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return compareOrdered(compareFloat(float64(a.Rep.Rating), float64(b.Rep.Rating)), true, true, spec.Order)
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case "duration":
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return compareOrdered(compareInt(a.Rep.DurationSec, b.Rep.DurationSec), true, true, spec.Order)
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case "bitrate":
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return compareOrdered(compareInt64(a.Rep.SizeBytes, b.Rep.SizeBytes), true, true, spec.Order)
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case "last_played":
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ta, oka := seriesLastPlayed(a, history)
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tb, okb := seriesLastPlayed(b, history)
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return compareOrdered(compareTime(ta, tb), oka, okb, spec.Order)
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default:
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return 0
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}
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}
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func mediaSortTitle(m model.Media) string {
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if strings.TrimSpace(m.Title) != "" {
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return m.Title
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}
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return m.OriginalName
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}
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func mediaReleaseTime(m model.Media) (time.Time, bool) {
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if raw := strings.TrimSpace(m.ReleaseDate); raw != "" {
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if parsed, err := time.Parse("2006-01-02", raw); err == nil {
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return parsed, true
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}
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}
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if m.Year > 0 {
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return time.Date(m.Year, time.January, 1, 0, 0, 0, 0, time.UTC), true
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}
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return time.Time{}, false
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}
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func mediaUpdatedTime(m model.Media) (time.Time, bool) {
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if !m.UpdatedAt.IsZero() {
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return m.UpdatedAt, true
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}
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if !m.CreatedAt.IsZero() {
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return m.CreatedAt, true
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}
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return time.Time{}, false
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}
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func seriesUpdatedTime(card SeriesCard) (time.Time, bool) {
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if card.LastAddedAt != nil && !card.LastAddedAt.IsZero() {
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return *card.LastAddedAt, true
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}
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return time.Time{}, false
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}
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func seriesLastPlayed(card SeriesCard, history map[string]time.Time) (time.Time, bool) {
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for _, id := range []string{card.Rep.ID, card.LinkMedia.ID} {
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if played, ok := history[id]; ok {
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return played, true
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}
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}
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return time.Time{}, false
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}
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func mediaItemLastPlayedTime(item MediaItem, history map[string]time.Time) (time.Time, bool) {
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best, found := history[item.ID]
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for _, version := range item.Versions {
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if played, ok := history[version.ID]; ok && (!found || played.After(best)) {
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best = played
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found = true
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}
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}
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return best, found
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}
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func compareOrdered(cmp int, aValid, bValid bool, order string) int {
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if !aValid && !bValid {
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return 0
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}
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if !aValid {
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return 1
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}
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if !bValid {
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return -1
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}
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if order == "desc" {
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return -cmp
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}
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return cmp
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}
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func compareTime(a, b time.Time) int {
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if a.Before(b) {
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return -1
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}
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if a.After(b) {
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return 1
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}
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return 0
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}
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func compareInt(a, b int) int {
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if a < b {
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return -1
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}
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if a > b {
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return 1
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}
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return 0
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}
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func compareInt64(a, b int64) int {
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if a < b {
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return -1
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}
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if a > b {
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return 1
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}
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return 0
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}
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func compareFloat(a, b float64) int {
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if a < b {
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return -1
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}
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if a > b {
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return 1
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}
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return 0
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}
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func compareID(a, b string) int {
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return strings.Compare(a, b)
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}
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