1package eu.siacs.conversations.xml;
 2
 3import com.google.common.collect.Iterables;
 4
 5import java.util.HashMap;
 6import java.util.Locale;
 7import java.util.Map;
 8
 9public class LocalizedContent {
10
11    public static final String STREAM_LANGUAGE = "en";
12
13    public final String content;
14    public final String language;
15    public final int count;
16
17    private LocalizedContent(String content, String language, int count) {
18        this.content = content;
19        this.language = language;
20        this.count = count;
21    }
22
23    public static LocalizedContent get(final Element element, String name) {
24        final HashMap<String, String> contents = new HashMap<>();
25        for(Element child : element.children) {
26            if (name.equals(child.getName())) {
27                final String namespace = child.getNamespace();
28                final String lang = child.getAttribute("xml:lang");
29                final String content = child.getContent();
30                if (content != null && (namespace == null || "jabber:client".equals(namespace))) {
31                    if (contents.put(lang, content) != null) {
32                        //anything that has multiple contents for the same language is invalid
33                        return null;
34                    }
35                }
36            }
37        }
38        if (contents.size() == 0) {
39            return null;
40        }
41        final String userLanguage = Locale.getDefault().getLanguage();
42        final String localized = contents.get(userLanguage);
43        if (localized != null) {
44            return new LocalizedContent(localized, userLanguage, contents.size());
45        }
46        final String defaultLanguageContent = contents.get(null);
47        if (defaultLanguageContent != null) {
48            return new LocalizedContent(defaultLanguageContent, STREAM_LANGUAGE, contents.size());
49        }
50        final String streamLanguageContent = contents.get(STREAM_LANGUAGE);
51        if (streamLanguageContent != null) {
52            return new LocalizedContent(streamLanguageContent, STREAM_LANGUAGE, contents.size());
53        }
54        final Map.Entry<String, String> first = Iterables.get(contents.entrySet(), 0);
55        return new LocalizedContent(first.getValue(), first.getKey(), contents.size());
56    }
57}