mastodon-app-ufficiale-android/tools/VerifyTranslatedStringForma...

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// run: java tools/VerifyTranslatedStringFormatting.java
// Reads all localized strings and makes sure they contain valid formatting placeholders matching the original English strings to avoid crashes.
import org.w3c.dom.*;
import javax.xml.parsers.*;
import java.io.*;
import java.util.*;
import java.util.regex.*;
public class VerifyTranslatedStringFormatting{
// %[argument_index$][flags][width][.precision][t]conversion
private static final String formatSpecifier="%(\\d+\\$)?([-#+ 0,(\\<]*)?(\\d+)?(\\.\\d+)?([tT])?([a-zA-Z%])";
private static final Pattern fsPattern=Pattern.compile(formatSpecifier);
private static HashMap<String, List<String>> placeholdersInStrings=new HashMap<>();
private static int errorCount=0;
public static void main(String[] args) throws Exception{
DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(false);
DocumentBuilder builder=factory.newDocumentBuilder();
Document doc;
try(FileInputStream in=new FileInputStream("mastodon/src/main/res/values/strings.xml")){
doc=builder.parse(in);
}
NodeList list=doc.getDocumentElement().getChildNodes(); // why does this stupid NodeList thing exist at all?
for(int i=0;i<list.getLength();i++){
if(list.item(i) instanceof Element el){
String name=el.getAttribute("name");
String value;
if("string".equals(el.getTagName())){
value=el.getTextContent();
}else if("plurals".equals(el.getTagName())){
value=el.getElementsByTagName("item").item(0).getTextContent();
}else{
System.out.println("Warning: unexpected tag "+name);
continue;
}
ArrayList<String> placeholders=new ArrayList<>();
Matcher matcher=fsPattern.matcher(value);
while(matcher.find()){
placeholders.add(matcher.group());
}
placeholdersInStrings.put(name, placeholders);
}
}
for(File file:new File("mastodon/src/main/res").listFiles()){
if(file.getName().startsWith("values-")){
File stringsXml=new File(file, "strings.xml");
if(stringsXml.exists()){
processFile(stringsXml);
}
}
}
if(errorCount>0){
System.err.println("Found "+errorCount+" problems in localized strings");
System.exit(1);
}
}
private static void processFile(File file) throws Exception{
DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(false);
DocumentBuilder builder=factory.newDocumentBuilder();
Document doc;
try(FileInputStream in=new FileInputStream(file)){
doc=builder.parse(in);
}
NodeList list=doc.getDocumentElement().getChildNodes();
for(int i=0;i<list.getLength();i++){
if(list.item(i) instanceof Element el){
String name=el.getAttribute("name");
String value;
if("string".equals(el.getTagName())){
value=el.getTextContent();
if(!verifyString(value, placeholdersInStrings.get(name))){
errorCount++;
System.out.println(file+": string "+name+" is missing placeholders");
}
}else if("plurals".equals(el.getTagName())){
NodeList items=el.getElementsByTagName("item");
for(int j=0;j<items.getLength();j++){
Element item=(Element)items.item(j);
value=item.getTextContent();
String quantity=item.getAttribute("quantity");
if(!verifyString(value, placeholdersInStrings.get(name))){
// Some languages use zero/one/two for just these numbers so they may skip the placeholder
// still make sure that there's no '%' characters to avoid crashes
if(List.of("zero", "one", "two").contains(quantity) && !value.contains("%")){
continue;
}
errorCount++;
System.out.println(file+": string "+name+"["+quantity+"] is missing placeholders");
}
}
}else{
System.out.println("Warning: unexpected tag "+name);
continue;
}
}
}
}
private static boolean verifyString(String str, List<String> placeholders){
for(String placeholder:placeholders){
if(placeholder.equals("%,d")){
// %,d and %d are interchangeable but %,d provides nicer formatting
if(!str.contains(placeholder) && !str.contains("%d"))
return false;
}else if(!str.contains(placeholder)){
return false;
}
}
return true;
}
}