github.com/kayoticsully/syncthing@v0.8.9-0.20140724133906-c45a2fdc03f8/cmd/translate/main.go

package main

import (
	"encoding/json"
	"log"
	"os"
	"strings"

	"code.google.com/p/go.net/html"
)

var trans = make(map[string]string)

func generalNode(n *html.Node) {
	translate := false
	if n.Type == html.ElementNode {
		for _, a := range n.Attr {
			if a.Key == "translate" {
				translate = true
				break
			}
		}
	} else if n.Type == html.TextNode {
		v := strings.TrimSpace(n.Data)
		if len(v) > 1 && !(strings.HasPrefix(v, "{{") && strings.HasSuffix(v, "}}")) {
			log.Println("Untranslated text node:")
			log.Print("\t" + v)
		}
	}
	for c := n.FirstChild; c != nil; c = c.NextSibling {
		if translate {
			inTranslate(c)
		} else {
			generalNode(c)
		}
	}
}

func inTranslate(n *html.Node) {
	if n.Type == html.TextNode {
		v := strings.TrimSpace(n.Data)
		if _, ok := trans[v]; !ok {
			av := strings.Replace(v, "{%", "{{", -1)
			av = strings.Replace(av, "%}", "}}", -1)
			trans[v] = av
		}
	} else {
		log.Println("translate node with non-text child <")
		log.Println(n)
	}
	if n.FirstChild != nil {
		log.Println("translate node has children:")
		log.Println(n.Data)
	}
}

func main() {
	fd, err := os.Open(os.Args[1])
	if err != nil {
		log.Fatal(err)
	}
	err = json.NewDecoder(fd).Decode(&trans)
	if err != nil {
		log.Fatal(err)
	}
	fd.Close()

	doc, err := html.Parse(os.Stdin)
	if err != nil {
		log.Fatal(err)
	}
	generalNode(doc)
	bs, err := json.MarshalIndent(trans, "", "   ")
	if err != nil {
		log.Fatal(err)
	}
	os.Stdout.Write(bs)
}