refactor scraper query helpers by responsibility

internal/service/scraper_query_paths.go

@@ -0,0 +1,159 @@
+package service
+
+import "strings"
+
+func mediaFolderTitle(mediaPath, libraryRoot string) string {
+	dir := parentSlashPath(mediaPath)
+	root := comparableLibraryRoot(libraryRoot)
+	for depth := 0; depth < 5 && dir != ""; depth++ {
+		if root != "" && sameSlashPath(dir, root) {
+			return libraryRootTitle(libraryRoot)
+		}
+		base := pathBaseSlash(dir)
+		if base == "" || base == "." {
+			return ""
+		}
+		if isTechnicalMediaFolder(base) || strictSeasonFolderMatched(base) {
+			dir = parentSlashPath(dir)
+			continue
+		}
+		if isGenericMediaCategoryFolder(base) {
+			return ""
+		}
+		title, _ := CleanQuery(base)
+		if title == "" {
+			title = strings.TrimSpace(base)
+		}
+		return strings.TrimSpace(title)
+	}
+	return ""
+}
+
+func isTechnicalMediaFolder(name string) bool {
+	key := strings.ToLower(strings.TrimSpace(name))
+	compact := strings.NewReplacer(" ", "", "_", "", ".", "", "-", "").Replace(key)
+	switch compact {
+	case "bdmv", "stream", "certificate", "videots", "audiots",
+		"subs", "subtitles", "subtitle", "sample", "samples",
+		"extra", "extras", "featurette", "featurettes":
+		return true
+	default:
+		return numberedTechnicalFolder(compact, "disc") ||
+			numberedTechnicalFolder(compact, "disk") ||
+			numberedTechnicalFolder(compact, "cd") ||
+			numberedTechnicalFolder(compact, "dvd") ||
+			numberedTechnicalFolder(compact, "part")
+	}
+}
+
+func numberedTechnicalFolder(value, prefix string) bool {
+	if !strings.HasPrefix(value, prefix) || len(value) == len(prefix) {
+		return false
+	}
+	for _, r := range value[len(prefix):] {
+		if r < '0' || r > '9' {
+			return false
+		}
+	}
+	return true
+}
+
+func cleanSlashPath(value string) string {
+	value = strings.TrimSpace(strings.ReplaceAll(value, "\\", "/"))
+	return strings.TrimRight(value, "/")
+}
+
+func comparableLibraryRoot(libraryRoot string) string {
+	if info, ok := ParseCloudLibraryMount(libraryRoot); ok {
+		if strings.TrimSpace(info.DisplayDir) == "" {
+			return "cloud://" + info.Provider
+		}
+		return "cloud://" + info.Provider + "/" + info.DisplayDir
+	}
+	return cleanSlashPath(libraryRoot)
+}
+
+func sameSlashPath(a, b string) bool {
+	return strings.EqualFold(cleanSlashPath(a), cleanSlashPath(b))
+}
+
+func parentSlashPath(value string) string {
+	value = cleanSlashPath(value)
+	if value == "" {
+		return ""
+	}
+	idx := strings.LastIndex(value, "/")
+	if idx < 0 {
+		return ""
+	}
+	return strings.TrimRight(value[:idx], "/")
+}
+
+func seriesFolderTitle(mediaPath, libraryRoot string) string {
+	dir := parentSlashPath(mediaPath)
+	if strictSeasonFolderMatched(pathBaseSlash(dir)) {
+		dir = parentSlashPath(dir)
+	}
+	if root := comparableLibraryRoot(libraryRoot); root != "" && sameSlashPath(dir, root) {
+		return libraryRootTitle(libraryRoot)
+	}
+	base := pathBaseSlash(dir)
+	if base == "" || base == "." {
+		return ""
+	}
+	if isGenericMediaCategoryFolder(base) || isTechnicalMediaFolder(base) || strictSeasonFolderMatched(base) {
+		return ""
+	}
+	return base
+}
+
+func libraryRootTitle(libraryRoot string) string {
+	base := ""
+	if info, ok := ParseCloudLibraryMount(libraryRoot); ok {
+		base = pathBaseSlash(info.DisplayDir)
+	} else {
+		base = pathBaseSlash(libraryRoot)
+	}
+	if base == "" || base == "." || isGenericMediaCategoryFolder(base) || isTechnicalMediaFolder(base) || strictSeasonFolderMatched(base) {
+		return ""
+	}
+	return base
+}
+
+func isGenericMediaCategoryFolder(name string) bool {
+	key := strings.ToLower(strings.TrimSpace(name))
+	key = strings.Trim(key, `\/`)
+	switch key {
+	case "",
+		"电影", "movies", "movie",
+		"电视剧", "剧集", "tv", "shows", "series",
+		"动漫", "动画", "anime", "bangumi",
+		"国产剧", "国剧", "大陆剧", "国产电视剧",
+		"欧美剧", "欧美电视剧",
+		"日韩剧", "日剧", "韩剧",
+		"华语电影", "国产电影", "大陆电影",
+		"外语电影", "欧美电影", "日韩电影",
+		"动画电影", "动漫电影",
+		"国漫", "国产动漫", "日番", "日漫", "日本动漫", "日本动画", "欧美动漫", "欧美动画", "西方动画",
+		"综艺", "真人秀",
+		"纪录片", "纪录",
+		"儿童", "少儿",
+		"成人", "番号", "9kg",
+		"未分类", "uncategorized":
+		return true
+	default:
+		return false
+	}
+}
+
+func strictSeasonFolder(name string) int {
+	if season, ok := seasonFromDir(name); ok {
+		return season
+	}
+	return 0
+}
+
+func strictSeasonFolderMatched(name string) bool {
+	_, ok := seasonFromDir(name)
+	return ok
+}