package de.thedevstack.conversationsplus.xmpp.avatar;

import de.thedevstack.conversationsplus.xml.Element;
import de.thedevstack.conversationsplus.xmpp.pep.Avatar;
import de.thedevstack.conversationsplus.xmpp.stanzas.PresencePacket;

/**
 */
public final class AvatarVcardParser {
    private AvatarVcardParser() {}

    public static Avatar parseVcardPresenceInformation(PresencePacket packet) {
        return AvatarVcardParser.parsePresence(packet.findChild("x", "vcard-temp:x:update"));
    }

    public static Avatar parsePresence(Element x) {
        String hash = (x == null) ? null : x.findChildContent("photo");
        if (hash == null) {
            return null;
        }
        if (!Avatar.isValidSHA1(hash)) {
            return null;
        }
        Avatar avatar = new Avatar();
        avatar.sha1sum = hash;
        avatar.origin = Avatar.Origin.VCARD;
        return avatar;
    }
}