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package eu.siacs.conversations.entities;
import android.content.ContentValues;
import android.util.Base64;
import java.io.UnsupportedEncodingException;
import java.lang.Comparable;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import eu.siacs.conversations.xml.Element;
import eu.siacs.conversations.xmpp.stanzas.IqPacket;
public class ServiceDiscoveryResult {
protected static String blankNull(String s) {
return s == null ? "" : s;
}
public static class Identity implements Comparable {
protected final String category;
protected final String type;
protected final String lang;
protected final String name;
public Identity(final String category, final String type, final String lang, final String name) {
this.category = category;
this.type = type;
this.lang = lang;
this.name = name;
}
public Identity(final Element el) {
this.category = el.getAttribute("category");
this.type = el.getAttribute("type");
this.lang = el.getAttribute("xml:lang");
this.name = el.getAttribute("name");
}
public String getCategory() {
return this.category;
}
public String getType() {
return this.type;
}
public String getLang() {
return this.lang;
}
public String getName() {
return this.name;
}
public int compareTo(Object other) {
Identity o = (Identity)other;
int r = blankNull(this.getCategory()).compareTo(blankNull(o.getCategory()));
if(r == 0) {
r = blankNull(this.getType()).compareTo(blankNull(o.getType()));
}
if(r == 0) {
r = blankNull(this.getLang()).compareTo(blankNull(o.getLang()));
}
if(r == 0) {
r = blankNull(this.getName()).compareTo(blankNull(o.getName()));
}
return r;
}
public JSONObject toJSON() {
try {
JSONObject o = new JSONObject();
o.put("category", this.getCategory());
o.put("type", this.getType());
o.put("lang", this.getLang());
o.put("name", this.getName());
return o;
} catch(JSONException e) {
return null;
}
}
}
protected final List<Identity> identities;
protected final List<String> features;
public ServiceDiscoveryResult(final List<Identity> identities, final List<String> features) {
this.identities = identities;
this.features = features;
}
public ServiceDiscoveryResult(final IqPacket packet) {
this.identities = new ArrayList<>();
this.features = new ArrayList<>();
final List<Element> elements = packet.query().getChildren();
for (final Element element : elements) {
if (element.getName().equals("identity")) {
Identity id = new Identity(element);
if (id.getType() != null && id.getCategory() != null) {
identities.add(id);
}
} else if (element.getName().equals("feature")) {
if (element.getAttribute("var") != null) {
features.add(element.getAttribute("var"));
}
}
}
}
public List<Identity> getIdentities() {
return this.identities;
}
public List<String> getFeatures() {
return this.features;
}
public boolean hasIdentity(String category, String type) {
for(Identity id : this.getIdentities()) {
if((category == null || id.getCategory().equals(category)) &&
(type == null || id.getType().equals(type))) {
return true;
}
}
return false;
}
public byte[] getCapHash() {
StringBuilder s = new StringBuilder();
List<Identity> identities = this.getIdentities();
Collections.sort(identities);
for(Identity id : identities) {
s.append(
blankNull(id.getCategory()) + "/" +
blankNull(id.getType()) + "/" +
blankNull(id.getLang()) + "/" +
blankNull(id.getName()) + "<"
);
}
List<String> features = this.getFeatures();
Collections.sort(features);
for (String feature : features) {
s.append(feature + "<");
}
// TODO: data forms?
MessageDigest md;
try {
md = MessageDigest.getInstance("SHA-1");
} catch (NoSuchAlgorithmException e) {
return null;
}
try {
return md.digest(s.toString().getBytes("UTF-8"));
} catch(UnsupportedEncodingException e) {
return null;
}
}
public JSONObject toJSON() {
try {
JSONObject o = new JSONObject();
JSONArray ids = new JSONArray();
for(Identity id : this.getIdentities()) {
ids.put(id.toJSON());
}
o.put("identites", ids);
o.put("features", new JSONArray(this.getFeatures()));
return o;
} catch(JSONException e) {
return null;
}
}
}
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