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package main
import (
"errors"
"flag"
"fmt"
"go/ast"
"go/parser"
"go/token"
"io/fs"
"os"
"path/filepath"
"regexp"
"strconv"
"strings"
"github.com/martinlehoux/kagamigo/kcore"
"golang.org/x/exp/slog"
"gopkg.in/yaml.v3"
)
func isIdentifierRune(char rune) bool {
return (char >= 'a' && char <= 'z') || (char >= 'A' && char <= 'Z') || char == '.'
}
type ArgsParser struct {
argsCount int
currentBlock string
currentNesting int
currentStringLiteral bool
}
func (p *ArgsParser) parseStringLiteral(char rune) {
switch char {
case '"':
p.currentStringLiteral = false
p.currentBlock = ""
default:
p.currentBlock += string(char)
}
}
func (p *ArgsParser) parseNonStringLiteral(char rune) {
if isIdentifierRune(char) {
p.currentBlock += string(char)
return
}
switch char {
case ' ':
if p.currentBlock != "" {
if p.currentNesting == 0 {
p.argsCount++
}
p.currentBlock = ""
}
case '(':
p.currentBlock = ""
p.currentNesting++
case ')':
p.currentBlock = ""
p.currentNesting--
p.argsCount++
case '"':
p.currentStringLiteral = true
}
}
func (p *ArgsParser) Parse(args string) {
for _, char := range args {
switch p.currentStringLiteral {
case true:
p.parseStringLiteral(char)
case false:
p.parseNonStringLiteral(char)
}
}
}
func (p ArgsParser) ArgsCount() int {
if p.currentBlock != "" {
p.argsCount++
}
return p.argsCount
}
func extractKeys(content string) map[string]int {
extractedKeys := make(map[string]int, 0)
reg := regexp.MustCompile(`\{ ?((?:login\.)?Tr\("[^"]*"[^}]*\) ?)\}`)
matches := reg.FindAllStringSubmatch(content, -1)
for _, match := range matches {
fakePackage := fmt.Sprintf(`package main
func main() {
%s
}
`, match[1])
fset := token.NewFileSet()
f, err := parser.ParseFile(fset, "", fakePackage, 0)
kcore.Expect(err, "error parsing file")
main := f.Decls[0].(*ast.FuncDecl)
call := main.Body.List[0].(*ast.ExprStmt).X.(*ast.CallExpr)
isTrCall := false
switch call.Fun.(type) {
case *ast.SelectorExpr:
selector := call.Fun.(*ast.SelectorExpr)
isTrCall = selector.Sel.Name == "Tr"
case *ast.Ident:
ident := call.Fun.(*ast.Ident)
isTrCall = ident.Name == "Tr"
}
if isTrCall {
keyLiteral := call.Args[1].(*ast.BasicLit).Value
key, err := strconv.Unquote(keyLiteral)
if err != nil {
slog.Warn("error unquoting key", "key", keyLiteral)
key = strings.Trim(keyLiteral, `"`)
}
extractedKeys[key] = len(call.Args) - 2
}
}
return extractedKeys
}
func extractAllKeys() map[string]int {
extractedKeys := make(map[string]int, 0)
err := filepath.Walk(".", func(path string, info fs.FileInfo, err error) error {
if !info.IsDir() && filepath.Ext(path) == ".templ" {
content, err := os.ReadFile(path) // #nosec G304
kcore.Expect(err, "error reading file")
for key, value := range extractKeys(string(content)) {
extractedKeys[key] = value
}
}
return nil
})
kcore.Expect(err, "error walking templates directory")
return extractedKeys
}
func getOrCreateLocale(lang string, logger *slog.Logger) map[string]string {
currentLocales := make(map[string]string, 0)
locales, err := os.ReadFile(filepath.Join("locales", lang, "index.yml")) // #nosec G304
if errors.Is(err, os.ErrNotExist) {
logger.Info("no locales file found, creating")
err = os.MkdirAll(filepath.Join("locales", lang), 0o700)
kcore.Expect(err, "error creating directory")
err = os.WriteFile(filepath.Join("locales", lang, "index.yml"), []byte{}, 0o600)
kcore.Expect(err, "error writing file")
locales, err = os.ReadFile(filepath.Join("locales", lang, "index.yml")) // #nosec G304
kcore.Expect(err, "error reading file")
} else {
kcore.Expect(err, "error reading file")
}
kcore.Expect(yaml.Unmarshal(locales, ¤tLocales), "error unmarshalling yaml")
return currentLocales
}
func main() {
write := flag.Bool("write", false, "write new locales")
flag.Parse()
baseLogger := slog.Default()
langs := [...]string{"en-GB", "fr-FR"}
extractedKeys := extractAllKeys()
baseLogger.Info("extracted keys from templates", slog.Int("count", len(extractedKeys)))
for _, lang := range langs {
logger := baseLogger.With(slog.String("lang", lang))
currentLocales := getOrCreateLocale(lang, logger)
newLocales := make(map[string]string, 0)
correctLocales := 0
for key, translation := range currentLocales {
currentArgsCount := strings.Count(translation, "%")
expectedArgsCount, ok := extractedKeys[key]
switch {
case !ok:
logger.Info(`found unused key`, slog.String("key", key))
case currentArgsCount != expectedArgsCount:
logger.Info(`found translation with incorrect number of arguments`, slog.String("key", key), slog.Int("current", currentArgsCount), slog.Int("expected", expectedArgsCount))
newLocales[key] = ""
case translation == "":
newLocales[key] = ""
default:
newLocales[key] = currentLocales[key]
correctLocales++
}
}
for key := range extractedKeys {
if _, ok := currentLocales[key]; !ok {
logger.Info(`found missing key`, slog.String("key", key))
newLocales[key] = ""
}
}
var completion string
if len(extractedKeys) > 0 {
completion = fmt.Sprintf("%d%%", correctLocales*100/len(extractedKeys))
} else {
completion = "?%"
}
logger.Info("finished checking locales", slog.Int("count", len(newLocales)), slog.Int("correct", correctLocales), slog.String("completion", completion))
if *write {
content, err := yaml.Marshal(newLocales)
kcore.Expect(err, "error marshalling yaml")
kcore.Expect(os.WriteFile(filepath.Join("locales", lang, "index.yml"), content, 0o600), "error writing file")
}
}
}
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