Initial open source release

internal/app/langpack/parser.go

@@ -0,0 +1,109 @@
+package langpack
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strconv"
+	"strings"
+
+	"telesrv/internal/domain"
+)
+
+var tdesktopStringRE = regexp.MustCompile(`(?s)"((?:\\.|[^"\\])*)"\s*=\s*"((?:\\.|[^"\\])*)";`)
+
+// ParseTDesktopFile 解析 TDesktop .strings 文件为 domain 语言包。
+func ParseTDesktopFile(path string) (domain.LangPack, error) {
+	pack, err := packFromFilename(path)
+	if err != nil {
+		return domain.LangPack{}, err
+	}
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return domain.LangPack{}, fmt.Errorf("read tdesktop langpack %q: %w", path, err)
+	}
+
+	plain := make([]domain.LangPackString, 0)
+	plurals := make(map[string]*domain.LangPackString)
+	pluralOrder := make([]string, 0)
+	for _, match := range tdesktopStringRE.FindAllStringSubmatch(string(data), -1) {
+		key := unquoteTDesktop(match[1])
+		value := unquoteTDesktop(match[2])
+		base, plural := splitPluralKey(key)
+		if plural == "" {
+			plain = append(plain, domain.LangPackString{Key: key, Value: value})
+			continue
+		}
+		item, ok := plurals[base]
+		if !ok {
+			plurals[base] = &domain.LangPackString{Key: base, Pluralized: true}
+			item = plurals[base]
+			pluralOrder = append(pluralOrder, base)
+		}
+		setPluralValue(item, plural, value)
+	}
+
+	pack.Strings = make([]domain.LangPackString, 0, len(plain)+len(pluralOrder))
+	pack.Strings = append(pack.Strings, plain...)
+	for _, key := range pluralOrder {
+		pack.Strings = append(pack.Strings, *plurals[key])
+	}
+	return pack, nil
+}
+
+func packFromFilename(path string) (domain.LangPack, error) {
+	name := strings.TrimSuffix(filepath.Base(path), filepath.Ext(path))
+	const prefix = "tdesktop_"
+	if !strings.HasPrefix(name, prefix) {
+		return domain.LangPack{}, fmt.Errorf("invalid tdesktop langpack filename %q", filepath.Base(path))
+	}
+	rest := strings.TrimPrefix(name, prefix)
+	idx := strings.LastIndex(rest, "_v")
+	if idx <= 0 || idx+2 >= len(rest) {
+		return domain.LangPack{}, fmt.Errorf("invalid tdesktop langpack filename %q", filepath.Base(path))
+	}
+	version, err := strconv.Atoi(rest[idx+2:])
+	if err != nil {
+		return domain.LangPack{}, fmt.Errorf("parse langpack version %q: %w", rest[idx+2:], err)
+	}
+	return domain.LangPack{
+		LangPack: "tdesktop",
+		LangCode: rest[:idx],
+		Version:  version,
+	}, nil
+}
+
+func splitPluralKey(key string) (base, plural string) {
+	for _, suffix := range []string{"#zero", "#one", "#two", "#few", "#many", "#other"} {
+		if strings.HasSuffix(key, suffix) {
+			return strings.TrimSuffix(key, suffix), strings.TrimPrefix(suffix, "#")
+		}
+	}
+	return key, ""
+}
+
+func setPluralValue(item *domain.LangPackString, plural, value string) {
+	switch plural {
+	case "zero":
+		item.ZeroValue = value
+	case "one":
+		item.OneValue = value
+	case "two":
+		item.TwoValue = value
+	case "few":
+		item.FewValue = value
+	case "many":
+		item.ManyValue = value
+	case "other":
+		item.OtherValue = value
+	}
+}
+
+func unquoteTDesktop(s string) string {
+	v, err := strconv.Unquote(`"` + s + `"`)
+	if err != nil {
+		return s
+	}
+	return v
+}