split adult scraper helpers

internal/service/adult_scraper_code.go

@@ -0,0 +1,41 @@
+package service
+
+import (
+	"path/filepath"
+	"strings"
+)
+
+func AdultCodeFromMediaPath(path string) string {
+	if code := normalizeAdultCode(filepath.Base(path)); code != "" {
+		return code
+	}
+	return normalizeAdultCode(path)
+}
+
+func normalizeAdultCode(input string) string {
+	input = strings.ToUpper(strings.TrimSpace(input))
+	if input == "" {
+		return ""
+	}
+	input = strings.ReplaceAll(input, "_", "-")
+	if m := adultFC2Pattern.FindStringSubmatch(input); len(m) > 1 {
+		return "FC2-PPV-" + m[1]
+	}
+	if m := adultHEYZOPattern.FindStringSubmatch(input); len(m) > 1 {
+		return "HEYZO-" + m[1]
+	}
+	if m := adultUncensoredPattern.FindStringSubmatch(input); len(m) > 2 {
+		return m[1] + "-" + m[2]
+	}
+	for _, m := range adultStandardPattern.FindAllStringSubmatch(input, -1) {
+		if len(m) < 3 {
+			continue
+		}
+		prefix := strings.TrimSpace(m[1])
+		if _, excluded := adultExcludedPrefixes[prefix]; excluded {
+			continue
+		}
+		return prefix + "-" + m[2]
+	}
+	return ""
+}