Files
MeBox/internal/service/media_versions.go
T
truewhile 93866d169b 优化
2026-09-16 23:59:38 +08:00

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package service
import (
"fmt"
"path/filepath"
"regexp"
"sort"
"strconv"
"strings"
"github.com/truewhile/MeBox/internal/model"
)
type MediaItem struct {
model.Media
Versions []model.Media `json:"versions,omitempty"`
}
func normalizeGroupedMediaPage(page, pageSize int) (int, int) {
if page < 1 {
page = 1
}
if pageSize <= 0 {
pageSize = 50
}
if pageSize > maxMediaSearchPageSize {
pageSize = maxMediaSearchPageSize
}
return page, pageSize
}
func paginateMediaItems(items []MediaItem, page, pageSize int) []MediaItem {
page, pageSize = normalizeGroupedMediaPage(page, pageSize)
if len(items) == 0 {
// 返回非 nil 空切片:nil 会被 JSON 序列化成 "items": null,
// 前端 concat(null) 会得到 [null] 并在渲染期崩溃(空库进入白屏)。
return []MediaItem{}
}
start := (page - 1) * pageSize
if start >= len(items) {
return []MediaItem{}
}
end := start + pageSize
if end > len(items) {
end = len(items)
}
return items[start:end]
}
// PaginateMediaItems 导出分页辅助函数。
func PaginateMediaItems(items []MediaItem, page, pageSize int) []MediaItem {
return paginateMediaItems(items, page, pageSize)
}
func firstMediaItems(items []MediaItem, limit int) []MediaItem {
if len(items) == 0 {
return nil
}
if limit <= 0 {
limit = 50
}
if limit > maxMediaSearchLimit {
limit = maxMediaSearchLimit
}
if limit > len(items) {
limit = len(items)
}
return items[:limit]
}
// FirstMediaItems 导出截取前 N 项辅助函数。
func FirstMediaItems(items []MediaItem, limit int) []MediaItem {
return firstMediaItems(items, limit)
}
func groupMediaVersions(items []model.Media) []MediaItem {
if len(items) == 0 {
return nil
}
type group struct {
key string
rows []model.Media
}
groups := make([]group, 0, len(items))
byKey := make(map[string]int, len(items))
for _, item := range items {
key := mediaVersionGroupKey(item)
if key == "" {
groups = append(groups, group{rows: []model.Media{item}})
continue
}
if idx, ok := byKey[key]; ok {
groups[idx].rows = append(groups[idx].rows, item)
continue
}
byKey[key] = len(groups)
groups = append(groups, group{key: key, rows: []model.Media{item}})
}
out := make([]MediaItem, 0, len(groups))
for _, g := range groups {
sortMediaVersionsForDisplay(g.rows)
item := MediaItem{Media: g.rows[0]}
if len(g.rows) > 1 {
item.Versions = g.rows
}
out = append(out, item)
}
sort.SliceStable(out, func(i, j int) bool {
return out[i].CreatedAt.After(out[j].CreatedAt)
})
return out
}
// GroupMediaVersions 导出多版本分组函数。
func GroupMediaVersions(items []model.Media) []MediaItem {
return groupMediaVersions(items)
}
// GroupEpisodeVersionsForDisplay folds encoding/container variants into one
// episode while preserving season/episode ordering for episode-list APIs.
func GroupEpisodeVersionsForDisplay(items []model.Media) []MediaItem {
grouped := groupMediaVersions(items)
if grouped == nil {
return []MediaItem{}
}
sort.SliceStable(grouped, func(i, j int) bool {
if grouped[i].SeasonNum != grouped[j].SeasonNum {
return grouped[i].SeasonNum < grouped[j].SeasonNum
}
if grouped[i].EpisodeNum != grouped[j].EpisodeNum {
return grouped[i].EpisodeNum < grouped[j].EpisodeNum
}
return grouped[i].CreatedAt.Before(grouped[j].CreatedAt)
})
return grouped
}
func mediaVersionGroupKey(m model.Media) string {
// 远程 Emby 挂载条目保持独立,不与其它远程条目或本地条目折叠合并。
if IsEmbyRemoteID(m.ID) {
return fmt.Sprintf("embyremote:%s", m.ID)
}
libKey := strings.ToLower(strings.TrimSpace(m.LibraryID))
if libKey == "" {
libKey = strings.ToLower(strings.TrimSpace(m.DisplayLibraryID))
}
specialKind := mediaSpecialKind(m.Path)
season, episode := m.SeasonNum, m.EpisodeNum
if specialKind != "" && specialKind != mediaSpecialTheatrical && episode <= 0 {
if parsedSeason, parsedEpisode := ParseEpisode(m.Path); parsedEpisode > 0 {
season, episode = parsedSeason, parsedEpisode
}
}
if season > 0 || episode > 0 {
kind := specialKind
if kind == "" {
kind = "episode"
}
switch {
case m.TMDbID > 0:
return fmt.Sprintf("episode:%s:tmdb:%d:%d:%d", kind, m.TMDbID, season, episode)
case m.BangumiID > 0:
return fmt.Sprintf("episode:%s:bangumi:%d:%d:%d", kind, m.BangumiID, season, episode)
case strings.TrimSpace(m.DoubanID) != "":
return fmt.Sprintf("episode:%s:douban:%s:%d:%d", kind, strings.ToLower(strings.TrimSpace(m.DoubanID)), season, episode)
case strings.TrimSpace(m.TheTVDBID) != "":
return fmt.Sprintf("episode:%s:thetvdb:%s:%d:%d", kind, strings.ToLower(strings.TrimSpace(m.TheTVDBID)), season, episode)
}
title := firstNonEmpty(m.OriginalName, m.Title)
if title == "" {
title, _ = CleanQuery(m.Path)
}
title, _ = mediaVersionTitleKey(title)
if title == "" {
return ""
}
return strings.Join([]string{
"episode",
kind,
libKey,
title,
fmt.Sprintf("%d:%d", season, episode),
}, "|")
}
if specialKind != "" && specialKind != mediaSpecialTheatrical {
return mediaVersionStemGroupKey(m, libKey)
}
// 成人条目按番号折叠。在线刮削(MetaTube)会把番号与 provider「借用」
// 存进 douban_id/thetvdb_id,本地 NFO 路径则拿不到这两个字段;一旦按
// 外部 ID 分组,同一部片的各个分片就会因为元数据来源不同(在线刮削 vs
// 本地 NFO)裂成两张标题相同的卡。番号取自原文件名/路径/标题,与元数据
// 来源无关,因此这里统一用番号做版本身份。
if code := mediaAdultGroupCode(m); code != "" {
if libKey == "" {
libKey = "_"
}
return fmt.Sprintf("adult:%s:%s", libKey, code)
}
switch {
case m.TMDbID > 0:
if libKey != "" {
if specialKind != "" {
return fmt.Sprintf("movie:%s:%s:tmdb:%d", specialKind, libKey, m.TMDbID)
}
return fmt.Sprintf("movie:%s:tmdb:%d", libKey, m.TMDbID)
}
if specialKind != "" {
return fmt.Sprintf("movie:%s:tmdb:%d", specialKind, m.TMDbID)
}
return fmt.Sprintf("tmdb:%d", m.TMDbID)
case m.BangumiID > 0:
if libKey != "" {
if specialKind != "" {
return fmt.Sprintf("movie:%s:%s:bangumi:%d", specialKind, libKey, m.BangumiID)
}
return fmt.Sprintf("movie:%s:bangumi:%d", libKey, m.BangumiID)
}
if specialKind != "" {
return fmt.Sprintf("movie:%s:bangumi:%d", specialKind, m.BangumiID)
}
return fmt.Sprintf("bangumi:%d", m.BangumiID)
case strings.TrimSpace(m.DoubanID) != "":
if libKey != "" {
if specialKind != "" {
return fmt.Sprintf("movie:%s:%s:douban:%s", specialKind, libKey, strings.ToLower(strings.TrimSpace(m.DoubanID)))
}
return fmt.Sprintf("movie:%s:douban:%s", libKey, strings.ToLower(strings.TrimSpace(m.DoubanID)))
}
if specialKind != "" {
return "movie:" + specialKind + ":douban:" + strings.ToLower(strings.TrimSpace(m.DoubanID))
}
return "douban:" + strings.ToLower(strings.TrimSpace(m.DoubanID))
case strings.TrimSpace(m.TheTVDBID) != "":
if libKey != "" {
if specialKind != "" {
return fmt.Sprintf("movie:%s:%s:thetvdb:%s", specialKind, libKey, strings.ToLower(strings.TrimSpace(m.TheTVDBID)))
}
return fmt.Sprintf("movie:%s:thetvdb:%s", libKey, strings.ToLower(strings.TrimSpace(m.TheTVDBID)))
}
if specialKind != "" {
return "movie:" + specialKind + ":thetvdb:" + strings.ToLower(strings.TrimSpace(m.TheTVDBID))
}
return "thetvdb:" + strings.ToLower(strings.TrimSpace(m.TheTVDBID))
}
title := firstNonEmpty(m.OriginalName, m.Title)
titleYear := 0
if title == "" {
title, _ = CleanQuery(m.Path)
} else {
title, titleYear = mediaVersionTitleKey(title)
}
if title == "" {
// 无标题时退回同目录词干(覆盖 keep_ext 的 name.mkv.strm / name.mp4.strm)
if stemKey := mediaVersionStemGroupKey(m, libKey); stemKey != "" {
return stemKey
}
return ""
}
year := m.Year
if year <= 0 {
year = titleYear
}
if year <= 0 {
_, year = CleanQuery(m.Path)
}
if libKey != "" {
return fmt.Sprintf("movie:%s:%s:%d", libKey, title, year)
}
return fmt.Sprintf("movie:%s:%d", title, year)
}
// mediaAdultGroupCode 返回成人条目的番号,作为与元数据来源无关的版本身份。
//
// 只在已经确认是成人条目(NSFW)时才返回番号:番号本身来自原文件名/路径/
// 标题,不会随「在线刮削(MetaTube 把番号与 provider 借用进 douban_id/
// thetvdb_id)」还是「本地 NFO(不带外部 ID)」而改变,因此两条来源能算出
// 同一个键。未标记 NSFW 的条目仍走标题分组,普通影视库里 "The Matrix 1999"
// 这类文件名不会被当成番号。
func mediaAdultGroupCode(m model.Media) string {
if !m.NSFW {
return ""
}
code := firstText(
normalizeAdultCode(m.OriginalName),
AdultCodeFromMediaPath(m.Path),
normalizeAdultCode(m.Title),
)
if code == "" {
return ""
}
return canonicalAdultGroupCode(code)
}
// canonicalAdultGroupCode 去掉番号数字部分的补零,让 IPVR-00192 与 IPVR-192
// 这类同一部片的不同写法落到同一个分组键上。无法解析数字的番号原样返回
// (如 FC2-PPV-4701981)。
func canonicalAdultGroupCode(code string) string {
code = strings.ToUpper(strings.TrimSpace(code))
prefix, digits, ok := strings.Cut(code, "-")
if !ok {
return code
}
value, err := strconv.Atoi(digits)
if err != nil {
return code
}
return prefix + "-" + strconv.Itoa(value)
}
// mediaVersionStemGroupKey 按「库 + 父目录 + 文件词干」折叠多版本
// (如 竞女01.mkv.strm 与 竞女01.mp4.strm)。
func mediaVersionStemGroupKey(m model.Media, libKey string) string {
path := strings.ReplaceAll(strings.TrimSpace(m.Path), "\\", "/")
if path == "" || strings.HasPrefix(strings.ToLower(path), "cloud://") {
return ""
}
dir := ""
base := path
if idx := strings.LastIndex(path, "/"); idx >= 0 {
dir = path[:idx]
base = path[idx+1:]
}
stem := mediaVersionFileStem(base)
if stem == "" {
return ""
}
stem = normalizeMediaVersionText(stem)
if stem == "" {
return ""
}
if libKey == "" {
libKey = "_"
}
return fmt.Sprintf("stem:%s:%s:%s", libKey, strings.ToLower(dir), stem)
}
// mediaVersionFileStem 去掉最终扩展名;若为 .strm 且前一层是视频扩展,再剥一层。
func mediaVersionFileStem(name string) string {
return mediaFileStem(name)
}
// MediaVersionLabel 生成版本切换展示名(分辨率 / 容器 / 编码 / 体积 / 文件名)。
// 当只有容器等无法区分多版本的信息时,回退到清理后的文件名。
func MediaVersionLabel(m model.Media) string {
parts := make([]string, 0, 4)
isStrm := strings.HasSuffix(strings.ToLower(strings.TrimSpace(m.Path)), ".strm") ||
strings.TrimSpace(m.STRMURL) != ""
if m.Height > 0 {
parts = append(parts, fmt.Sprintf("%dp", m.Height))
} else if m.Width > 0 {
parts = append(parts, fmt.Sprintf("%dw", m.Width))
}
container := strings.Trim(strings.ToLower(strings.TrimSpace(m.Container)), ". ")
if container == "" || container == "strm" {
container = mediaVersionContainerFromPath(m.Path, m.STRMURL)
}
if container != "" && container != "strm" {
parts = append(parts, strings.ToUpper(container))
}
if codec := strings.TrimSpace(m.VideoCodec); codec != "" {
parts = append(parts, strings.ToUpper(codec))
}
// STRM 占位体积(通常几十到几百字节)不能区分分片,跳过。
placeholderSize := isStrm && m.SizeBytes > 0 && m.SizeBytes < 1024*1024
if m.SizeBytes > 0 && !placeholderSize {
parts = append(parts, formatMediaSize(m.SizeBytes))
}
if len(parts) > 0 && !mediaVersionLabelIndistinct(parts) {
return strings.Join(parts, " · ")
}
if cleaned := cleanMediaVersionFilename(m.Path); cleaned != "" {
return cleaned
}
return firstNonEmpty(m.Title, m.OriginalName, m.ID)
}
func mediaVersionLabelIndistinct(parts []string) bool {
if len(parts) == 0 {
return true
}
for _, part := range parts {
upper := strings.ToUpper(strings.TrimSpace(part))
if upper == "" || upper == "云端直链" || upper == "STRM" {
continue
}
if _, ok := videoExtensions["."+strings.ToLower(upper)]; ok {
continue
}
return false
}
return true
}
func cleanMediaVersionFilename(path string) string {
base := filepath.Base(strings.ReplaceAll(strings.TrimSpace(path), "\\", "/"))
if base == "" || base == "." {
return ""
}
stem := mediaFileStem(base)
stem = strings.ReplaceAll(stem, "_", " ")
stem = strings.ReplaceAll(stem, ".", " ")
return strings.Join(strings.Fields(stem), " ")
}
// mediaPartNumber 从路径提取分片序号(part1 / cd2 / -3)。
// 裸后缀只认 1–2 位数字,避免把年份 2024 当成 part。
func mediaPartNumber(path string) (int, bool) {
stem := mediaFileStem(filepath.Base(strings.ReplaceAll(strings.TrimSpace(path), "\\", "/")))
if stem == "" {
return 0, false
}
lower := strings.ToLower(stem)
for _, re := range mediaPartNumberPatterns {
if m := re.FindStringSubmatch(lower); len(m) == 2 {
n, err := strconv.Atoi(m[1])
if err == nil && n > 0 {
return n, true
}
}
}
return 0, false
}
var mediaPartNumberPatterns = []*regexp.Regexp{
regexp.MustCompile(`(?:^|[.\-_])part[\s._-]*(\d{1,3})$`),
regexp.MustCompile(`(?:^|[.\-_])(?:cd|disc|disk)[\s._-]*(\d{1,3})$`),
regexp.MustCompile(`[-_](\d{1,2})$`),
}
func sortMediaVersionsForDisplay(rows []model.Media) {
sort.SliceStable(rows, func(i, j int) bool {
return compareMediaVersionsForDisplay(rows[i], rows[j])
})
}
// compareMediaVersionsForDisplay:有分片号时按 1→2→3… 升序;否则按画质/体积择优。
func compareMediaVersionsForDisplay(a, b model.Media) bool {
pa, oka := mediaPartNumber(a.Path)
pb, okb := mediaPartNumber(b.Path)
if oka && okb {
if pa != pb {
return pa < pb
}
} else if oka != okb {
return oka
}
return betterMediaVersion(a, b)
}
func mediaVersionContainerFromPath(path, strmURL string) string {
base := filepath.Base(strings.ReplaceAll(strings.TrimSpace(path), "\\", "/"))
ext := strings.ToLower(filepath.Ext(base))
name := strings.TrimSuffix(base, ext)
if ext == ".strm" {
if second := strings.ToLower(filepath.Ext(name)); second != "" {
if _, ok := videoExtensions[second]; ok {
return strings.TrimPrefix(second, ".")
}
}
// 从 strm 播放 URL 的 /video.mkv 推断
u := strings.ToLower(strmURL)
if idx := strings.LastIndex(u, "/video."); idx >= 0 {
rest := u[idx+len("/video."):]
if end := strings.IndexAny(rest, "?#&/"); end >= 0 {
rest = rest[:end]
}
rest = strings.Trim(rest, ".")
if rest != "" {
return rest
}
}
return "strm"
}
if ext != "" {
if _, ok := videoExtensions[ext]; ok {
return strings.TrimPrefix(ext, ".")
}
}
return strings.TrimPrefix(ext, ".")
}
func formatMediaSize(bytes int64) string {
if bytes < 1024 {
return fmt.Sprintf("%d B", bytes)
}
const unit = 1024
div, exp := int64(unit), 0
for n := bytes / unit; n >= unit; n /= unit {
div *= unit
exp++
}
return fmt.Sprintf("%.1f %cB", float64(bytes)/float64(div), "KMGTPE"[exp])
}
func mediaVersionTitleKey(value string) (string, int) {
cleaned, year := CleanQuery(value)
if strings.TrimSpace(cleaned) == "" {
cleaned = value
}
return normalizeMediaVersionText(cleaned), year
}
func normalizeMediaVersionText(value string) string {
value = strings.ToLower(strings.TrimSpace(value))
if value == "" {
return ""
}
fields := strings.FieldsFunc(value, func(r rune) bool {
switch r {
case '.', '_', '-', ' ', '\t', '/', '\\', '[', ']', '(', ')', '(', ')', '【', '】':
return true
default:
return false
}
})
out := fields[:0]
for _, field := range fields {
field = strings.TrimSpace(field)
if field == "" {
continue
}
if _, noise := noiseTokenSet[field]; noise {
continue
}
// 去掉视频容器词干残留(keep_ext / 旧标题「竞女01 mkv」)
if _, ok := videoExtensions["."+field]; ok {
continue
}
out = append(out, field)
}
return strings.Join(out, " ")
}
func betterMediaVersion(candidate, current model.Media) bool {
candidateCloud := isCloudMediaVersion(candidate)
currentCloud := isCloudMediaVersion(current)
if candidateCloud != currentCloud {
return !candidateCloud
}
candidatePixels := candidate.Width * candidate.Height
currentPixels := current.Width * current.Height
if candidatePixels != currentPixels {
return candidatePixels > currentPixels
}
if candidate.SizeBytes != current.SizeBytes {
return candidate.SizeBytes > current.SizeBytes
}
return candidate.CreatedAt.After(current.CreatedAt)
}
func isCloudMediaVersion(media model.Media) bool {
return strings.HasPrefix(strings.ToLower(strings.TrimSpace(media.Path)), "cloud://") ||
strings.Contains(strings.ToLower(strings.TrimSpace(media.STRMURL)), "/api/cloud/play/")
}