初始化

初始化项目

internal/service/download_helpers.go

@@ -0,0 +1,75 @@
+package service
+
+import (
+	"strings"
+	"unicode"
+)
+
+// 整理入库与外部搜索依赖的通用标题归一化辅助函数。
+// 这些函数原本与订阅/下载逻辑共存，移除对应功能时保留为通用帮助函数。
+
+func normalizeAvailabilityComparable(value string) string {
+	var b strings.Builder
+	for _, r := range strings.ToLower(value) {
+		if unicode.IsLetter(r) || unicode.IsDigit(r) {
+			b.WriteRune(r)
+		}
+	}
+	return b.String()
+}
+
+func firstNonEmpty(values ...string) string {
+	for _, value := range values {
+		if strings.TrimSpace(value) != "" {
+			return strings.TrimSpace(value)
+		}
+	}
+	return ""
+}
+
+func compactUniqueStrings(values ...string) []string {
+	seen := map[string]struct{}{}
+	out := make([]string, 0, len(values))
+	for _, value := range values {
+		value = strings.TrimSpace(value)
+		if value == "" {
+			continue
+		}
+		key := normalizeAvailabilityComparable(value)
+		if key == "" {
+			continue
+		}
+		if _, ok := seen[key]; ok {
+			continue
+		}
+		seen[key] = struct{}{}
+		out = append(out, value)
+	}
+	return out
+}
+
+func titleMatchesResolution(titleFold, resolution string) bool {
+	switch strings.ToLower(strings.TrimSpace(resolution)) {
+	case "2160p", "4k", "uhd":
+		return strings.Contains(titleFold, "2160p") || strings.Contains(titleFold, "4k") || strings.Contains(titleFold, "uhd")
+	case "1080p":
+		return strings.Contains(titleFold, "1080p") || strings.Contains(titleFold, "fhd")
+	case "720p":
+		return strings.Contains(titleFold, "720p")
+	default:
+		return strings.Contains(titleFold, strings.ToLower(strings.TrimSpace(resolution)))
+	}
+}
+
+func detectResolutionScore(titleFold string) int {
+	switch {
+	case titleMatchesResolution(titleFold, "2160p"):
+		return 4
+	case titleMatchesResolution(titleFold, "1080p"):
+		return 3
+	case titleMatchesResolution(titleFold, "720p"):
+		return 2
+	default:
+		return 1
+	}
+}