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    public 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        final String parentLanguage = element.getAttribute("xml:lang");
26        for(Element child : element.getChildren()) {
27            if (name.equals(child.getName())) {
28                final String namespace = child.getNamespace();
29                final String childLanguage = child.getAttribute("xml:lang");
30                final String lang = childLanguage == null ? parentLanguage : childLanguage;
31                final String content = child.getContent();
32                if (content != null && (namespace == null || Namespace.JABBER_CLIENT.equals(namespace))) {
33                    if (contents.put(lang, content == null ? "" : content) != null) {
34                        //anything that has multiple contents for the same language is invalid
35                        return null;
36                    }
37                }
38            }
39        }
40        if (contents.size() == 0) {
41            return null;
42        }
43        final String userLanguage = Locale.getDefault().getLanguage();
44        final String localized = contents.get(userLanguage);
45        if (localized != null) {
46            return new LocalizedContent(localized, userLanguage, contents.size());
47        }
48        final String defaultLanguageContent = contents.get(null);
49        if (defaultLanguageContent != null) {
50            return new LocalizedContent(defaultLanguageContent, STREAM_LANGUAGE, contents.size());
51        }
52        final String streamLanguageContent = contents.get(STREAM_LANGUAGE);
53        if (streamLanguageContent != null) {
54            return new LocalizedContent(streamLanguageContent, STREAM_LANGUAGE, contents.size());
55        }
56        final Map.Entry<String, String> first = Iterables.get(contents.entrySet(), 0);
57        return new LocalizedContent(first.getValue(), first.getKey(), contents.size());
58    }
59}