127 lines
4.1 KiB
Java
127 lines
4.1 KiB
Java
package org.thoughtcrime.securesms.util;
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import android.content.Context;
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import android.support.annotation.NonNull;
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import android.support.annotation.Nullable;
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import android.util.Log;
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import org.thoughtcrime.securesms.R;
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import org.thoughtcrime.securesms.database.Address;
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import org.thoughtcrime.securesms.recipients.Recipient;
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import org.thoughtcrime.securesms.recipients.RecipientModifiedListener;
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import java.io.IOException;
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import java.util.LinkedList;
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import java.util.List;
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import static org.whispersystems.signalservice.internal.push.SignalServiceProtos.GroupContext;
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public class GroupUtil {
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private static final String ENCODED_SIGNAL_GROUP_PREFIX = "__textsecure_group__!";
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private static final String ENCODED_MMS_GROUP_PREFIX = "__signal_mms_group__!";
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private static final String TAG = GroupUtil.class.getSimpleName();
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public static String getEncodedId(byte[] groupId, boolean mms) {
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return (mms ? ENCODED_MMS_GROUP_PREFIX : ENCODED_SIGNAL_GROUP_PREFIX) + Hex.toStringCondensed(groupId);
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}
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public static byte[] getDecodedId(String groupId) throws IOException {
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if (!isEncodedGroup(groupId)) {
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throw new IOException("Invalid encoding");
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}
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return Hex.fromStringCondensed(groupId.split("!", 2)[1]);
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}
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public static boolean isEncodedGroup(@NonNull String groupId) {
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return groupId.startsWith(ENCODED_SIGNAL_GROUP_PREFIX) || groupId.startsWith(ENCODED_MMS_GROUP_PREFIX);
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}
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public static boolean isMmsGroup(@NonNull String groupId) {
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return groupId.startsWith(ENCODED_MMS_GROUP_PREFIX);
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}
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public static @NonNull GroupDescription getDescription(@NonNull Context context, @Nullable String encodedGroup) {
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if (encodedGroup == null) {
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return new GroupDescription(context, null);
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}
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try {
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GroupContext groupContext = GroupContext.parseFrom(Base64.decode(encodedGroup));
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return new GroupDescription(context, groupContext);
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} catch (IOException e) {
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Log.w(TAG, e);
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return new GroupDescription(context, null);
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}
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}
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public static class GroupDescription {
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@NonNull private final Context context;
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@Nullable private final GroupContext groupContext;
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@Nullable private final List<Recipient> members;
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public GroupDescription(@NonNull Context context, @Nullable GroupContext groupContext) {
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this.context = context.getApplicationContext();
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this.groupContext = groupContext;
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if (groupContext == null || groupContext.getMembersList().isEmpty()) {
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this.members = null;
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} else {
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this.members = new LinkedList<>();
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for (String member : groupContext.getMembersList()) {
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this.members.add(Recipient.from(context, Address.fromExternal(context, member), true));
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}
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}
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}
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public String toString(Recipient sender) {
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StringBuilder description = new StringBuilder();
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description.append(context.getString(R.string.MessageRecord_s_updated_group, sender.toShortString()));
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if (groupContext == null) {
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return description.toString();
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}
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String title = groupContext.getName();
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if (members != null) {
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description.append("\n");
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description.append(context.getResources().getQuantityString(R.plurals.GroupUtil_joined_the_group,
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members.size(), toString(members)));
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}
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if (title != null && !title.trim().isEmpty()) {
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if (members != null) description.append(" ");
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else description.append("\n");
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description.append(context.getString(R.string.GroupUtil_group_name_is_now, title));
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}
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return description.toString();
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}
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public void addListener(RecipientModifiedListener listener) {
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if (this.members != null) {
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for (Recipient member : this.members) {
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member.addListener(listener);
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}
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}
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}
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private String toString(List<Recipient> recipients) {
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String result = "";
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for (int i=0;i<recipients.size();i++) {
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result += recipients.get(i).toShortString();
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if (i != recipients.size() -1 )
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result += ", ";
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}
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return result;
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}
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}
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}
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