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GroupsV2UpdateMessageProducer.java
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GroupsV2UpdateMessageProducer.java
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package org.thoughtcrime.securesms.database.model;
import android.content.Context;
import androidx.annotation.NonNull;
import com.google.protobuf.ByteString;
import org.signal.storageservice.protos.groups.AccessControl;
import org.signal.storageservice.protos.groups.Member;
import org.signal.storageservice.protos.groups.local.DecryptedGroup;
import org.signal.storageservice.protos.groups.local.DecryptedGroupChange;
import org.signal.storageservice.protos.groups.local.DecryptedMember;
import org.signal.storageservice.protos.groups.local.DecryptedModifyMemberRole;
import org.signal.storageservice.protos.groups.local.DecryptedPendingMember;
import org.signal.storageservice.protos.groups.local.DecryptedPendingMemberRemoval;
import org.thoughtcrime.securesms.R;
import org.thoughtcrime.securesms.groups.GV2AccessLevelUtil;
import org.thoughtcrime.securesms.util.ExpirationUtil;
import org.whispersystems.libsignal.util.guava.Optional;
import org.whispersystems.signalservice.api.groupsv2.DecryptedGroupUtil;
import org.whispersystems.signalservice.api.util.UuidUtil;
import java.util.LinkedList;
import java.util.List;
import java.util.UUID;
final class GroupsV2UpdateMessageProducer {
@NonNull private final Context context;
@NonNull private final DescribeMemberStrategy descriptionStrategy;
@NonNull private final UUID selfUuid;
@NonNull private final ByteString selfUuidBytes;
/**
* @param descriptionStrategy Strategy for member description.
*/
GroupsV2UpdateMessageProducer(@NonNull Context context,
@NonNull DescribeMemberStrategy descriptionStrategy,
@NonNull UUID selfUuid)
{
this.context = context;
this.descriptionStrategy = descriptionStrategy;
this.selfUuid = selfUuid;
this.selfUuidBytes = UuidUtil.toByteString(selfUuid);
}
/**
* Describes a group that is new to you, use this when there is no available change record.
* <p>
* Invitation and groups you create are the most common cases where no change is available.
*/
String describeNewGroup(@NonNull DecryptedGroup group) {
Optional<DecryptedPendingMember> selfPending = DecryptedGroupUtil.findPendingByUuid(group.getPendingMembersList(), selfUuid);
if (selfPending.isPresent()) {
return context.getString(R.string.MessageRecord_s_invited_you_to_the_group, describe(selfPending.get().getAddedByUuid()));
}
if (group.getRevision() == 0) {
Optional<DecryptedMember> foundingMember = DecryptedGroupUtil.firstMember(group.getMembersList());
if (foundingMember.isPresent()) {
ByteString foundingMemberUuid = foundingMember.get().getUuid();
if (selfUuidBytes.equals(foundingMemberUuid)) {
return context.getString(R.string.MessageRecord_you_created_the_group);
} else {
return context.getString(R.string.MessageRecord_s_added_you, describe(foundingMemberUuid));
}
}
}
if (DecryptedGroupUtil.findMemberByUuid(group.getMembersList(), selfUuid).isPresent()) {
return context.getString(R.string.MessageRecord_you_joined_the_group);
} else {
return context.getString(R.string.MessageRecord_group_updated);
}
}
List<String> describeChange(@NonNull DecryptedGroupChange change) {
List<String> updates = new LinkedList<>();
describeMemberAdditions(change, updates);
describeMemberRemovals(change, updates);
describeModifyMemberRoles(change, updates);
describeInvitations(change, updates);
describeRevokedInvitations(change, updates);
describePromotePending(change, updates);
describeNewTitle(change, updates);
describeNewAvatar(change, updates);
describeNewTimer(change, updates);
describeNewAttributeAccess(change, updates);
describeNewMembershipAccess(change, updates);
if (updates.isEmpty()) {
describeUnknownChange(change, updates);
}
return updates;
}
/**
* Handles case of future protocol versions where we don't know what has changed.
*/
private void describeUnknownChange(@NonNull DecryptedGroupChange change, @NonNull List<String> updates) {
boolean editorIsYou = change.getEditor().equals(selfUuidBytes);
if (editorIsYou) {
updates.add(context.getString(R.string.MessageRecord_you_updated_group));
} else {
updates.add(context.getString(R.string.MessageRecord_s_updated_group, describe(change.getEditor())));
}
}
private void describeMemberAdditions(@NonNull DecryptedGroupChange change, @NonNull List<String> updates) {
boolean editorIsYou = change.getEditor().equals(selfUuidBytes);
for (DecryptedMember member : change.getNewMembersList()) {
boolean newMemberIsYou = member.getUuid().equals(selfUuidBytes);
if (editorIsYou) {
if (newMemberIsYou) {
updates.add(context.getString(R.string.MessageRecord_you_joined_the_group));
} else {
updates.add(context.getString(R.string.MessageRecord_you_added_s, describe(member.getUuid())));
}
} else {
if (newMemberIsYou) {
updates.add(context.getString(R.string.MessageRecord_s_added_you, describe(change.getEditor())));
} else {
if (member.getUuid().equals(change.getEditor())) {
updates.add(context.getString(R.string.MessageRecord_s_joined_the_group, describe(member.getUuid())));
} else {
updates.add(context.getString(R.string.MessageRecord_s_added_s, describe(change.getEditor()), describe(member.getUuid())));
}
}
}
}
}
private void describeMemberRemovals(@NonNull DecryptedGroupChange change, @NonNull List<String> updates) {
boolean editorIsYou = change.getEditor().equals(selfUuidBytes);
for (ByteString member : change.getDeleteMembersList()) {
boolean removedMemberIsYou = member.equals(selfUuidBytes);
if (editorIsYou) {
if (removedMemberIsYou) {
updates.add(context.getString(R.string.MessageRecord_you_left_the_group));
} else {
updates.add(context.getString(R.string.MessageRecord_you_removed_s, describe(member)));
}
} else {
if (removedMemberIsYou) {
updates.add(context.getString(R.string.MessageRecord_s_removed_you_from_the_group, describe(change.getEditor())));
} else {
if (member.equals(change.getEditor())) {
updates.add(context.getString(R.string.MessageRecord_s_left_the_group, describe(member)));
} else {
updates.add(context.getString(R.string.MessageRecord_s_removed_s, describe(change.getEditor()), describe(member)));
}
}
}
}
}
private void describeModifyMemberRoles(@NonNull DecryptedGroupChange change, @NonNull List<String> updates) {
boolean editorIsYou = change.getEditor().equals(selfUuidBytes);
for (DecryptedModifyMemberRole roleChange : change.getModifyMemberRolesList()) {
if (roleChange.getRole() == Member.Role.ADMINISTRATOR) {
boolean newMemberIsYou = roleChange.getUuid().equals(selfUuidBytes);
if (editorIsYou) {
updates.add(context.getString(R.string.MessageRecord_you_made_s_an_admin, describe(roleChange.getUuid())));
} else {
if (newMemberIsYou) {
updates.add(context.getString(R.string.MessageRecord_s_made_you_an_admin, describe(change.getEditor())));
} else {
updates.add(context.getString(R.string.MessageRecord_s_made_s_an_admin, describe(change.getEditor()), describe(roleChange.getUuid())));
}
}
} else {
boolean newMemberIsYou = roleChange.getUuid().equals(selfUuidBytes);
if (editorIsYou) {
updates.add(context.getString(R.string.MessageRecord_you_revoked_admin_privileges_from_s, describe(roleChange.getUuid())));
} else {
if (newMemberIsYou) {
updates.add(context.getString(R.string.MessageRecord_s_revoked_your_admin_privileges, describe(change.getEditor())));
} else {
updates.add(context.getString(R.string.MessageRecord_s_revoked_admin_privileges_from_s, describe(change.getEditor()), describe(roleChange.getUuid())));
}
}
}
}
}
private void describeInvitations(@NonNull DecryptedGroupChange change, @NonNull List<String> updates) {
boolean editorIsYou = change.getEditor().equals(selfUuidBytes);
int notYouInviteCount = 0;
for (DecryptedPendingMember invitee : change.getNewPendingMembersList()) {
boolean newMemberIsYou = invitee.getUuid().equals(selfUuidBytes);
if (newMemberIsYou) {
updates.add(context.getString(R.string.MessageRecord_s_invited_you_to_the_group, describe(change.getEditor())));
} else {
if (editorIsYou) {
updates.add(context.getString(R.string.MessageRecord_you_invited_s_to_the_group, describe(invitee.getUuid())));
} else {
notYouInviteCount++;
}
}
}
if (notYouInviteCount > 0) {
updates.add(context.getResources().getQuantityString(R.plurals.MessageRecord_s_invited_members, notYouInviteCount, describe(change.getEditor()), notYouInviteCount));
}
}
private void describeRevokedInvitations(@NonNull DecryptedGroupChange change, @NonNull List<String> updates) {
boolean editorIsYou = change.getEditor().equals(selfUuidBytes);
int notDeclineCount = 0;
for (DecryptedPendingMemberRemoval invitee : change.getDeletePendingMembersList()) {
boolean decline = invitee.getUuid().equals(change.getEditor());
if (decline) {
if (editorIsYou) {
updates.add(context.getString(R.string.MessageRecord_you_declined_the_invitation_to_the_group));
} else {
updates.add(context.getString(R.string.MessageRecord_someone_declined_an_invitation_to_the_group));
}
} else {
notDeclineCount++;
}
}
if (notDeclineCount > 0) {
if (editorIsYou) {
updates.add(context.getResources().getQuantityString(R.plurals.MessageRecord_you_revoked_invites, notDeclineCount, notDeclineCount));
} else {
updates.add(context.getResources().getQuantityString(R.plurals.MessageRecord_s_revoked_invites, notDeclineCount, describe(change.getEditor()), notDeclineCount));
}
}
}
private void describePromotePending(@NonNull DecryptedGroupChange change, @NonNull List<String> updates) {
boolean editorIsYou = change.getEditor().equals(selfUuidBytes);
for (DecryptedMember newMember : change.getPromotePendingMembersList()) {
ByteString uuid = newMember.getUuid();
boolean newMemberIsYou = uuid.equals(selfUuidBytes);
if (editorIsYou) {
if (newMemberIsYou) {
updates.add(context.getString(R.string.MessageRecord_you_accepted_invite));
} else {
updates.add(context.getString(R.string.MessageRecord_you_added_invited_member_s, describe(uuid)));
}
} else {
if (newMemberIsYou) {
updates.add(context.getString(R.string.MessageRecord_s_added_you, describe(change.getEditor())));
} else {
if (uuid.equals(change.getEditor())) {
updates.add(context.getString(R.string.MessageRecord_s_accepted_invite, describe(uuid)));
} else {
updates.add(context.getString(R.string.MessageRecord_s_added_invited_member_s, describe(change.getEditor()), describe(uuid)));
}
}
}
}
}
private void describeNewTitle(@NonNull DecryptedGroupChange change, @NonNull List<String> updates) {
boolean editorIsYou = change.getEditor().equals(selfUuidBytes);
if (change.hasNewTitle()) {
if (editorIsYou) {
updates.add(context.getString(R.string.MessageRecord_you_changed_the_group_name_to_s, change.getNewTitle().getValue()));
} else {
updates.add(context.getString(R.string.MessageRecord_s_changed_the_group_name_to_s, describe(change.getEditor()), change.getNewTitle().getValue()));
}
}
}
private void describeNewAvatar(@NonNull DecryptedGroupChange change, @NonNull List<String> updates) {
boolean editorIsYou = change.getEditor().equals(selfUuidBytes);
if (change.hasNewAvatar()) {
if (editorIsYou) {
updates.add(context.getString(R.string.MessageRecord_you_changed_the_group_avatar));
} else {
updates.add(context.getString(R.string.MessageRecord_s_changed_the_group_avatar, describe(change.getEditor())));
}
}
}
private void describeNewTimer(@NonNull DecryptedGroupChange change, @NonNull List<String> updates) {
boolean editorIsYou = change.getEditor().equals(selfUuidBytes);
if (change.hasNewTimer()) {
String time = ExpirationUtil.getExpirationDisplayValue(context, change.getNewTimer().getDuration());
if (editorIsYou) {
updates.add(context.getString(R.string.MessageRecord_you_set_disappearing_message_time_to_s, time));
} else {
updates.add(context.getString(R.string.MessageRecord_s_set_disappearing_message_time_to_s, describe(change.getEditor()), time));
}
}
}
private void describeNewAttributeAccess(@NonNull DecryptedGroupChange change, @NonNull List<String> updates) {
boolean editorIsYou = change.getEditor().equals(selfUuidBytes);
if (change.getNewAttributeAccess() != AccessControl.AccessRequired.UNKNOWN) {
String accessLevel = GV2AccessLevelUtil.toString(context, change.getNewAttributeAccess());
if (editorIsYou) {
updates.add(context.getString(R.string.MessageRecord_you_changed_who_can_edit_group_info_to_s, accessLevel));
} else {
updates.add(context.getString(R.string.MessageRecord_s_changed_who_can_edit_group_info_to_s, describe(change.getEditor()), accessLevel));
}
}
}
private void describeNewMembershipAccess(@NonNull DecryptedGroupChange change, @NonNull List<String> updates) {
boolean editorIsYou = change.getEditor().equals(selfUuidBytes);
if (change.getNewMemberAccess() != AccessControl.AccessRequired.UNKNOWN) {
String accessLevel = GV2AccessLevelUtil.toString(context, change.getNewMemberAccess());
if (editorIsYou) {
updates.add(context.getString(R.string.MessageRecord_you_changed_who_can_edit_group_membership_to_s, accessLevel));
} else {
updates.add(context.getString(R.string.MessageRecord_s_changed_who_can_edit_group_membership_to_s, describe(change.getEditor()), accessLevel));
}
}
}
private @NonNull String describe(@NonNull ByteString uuid) {
return descriptionStrategy.describe(UuidUtil.fromByteString(uuid));
}
interface DescribeMemberStrategy {
/**
* Map a UUID to a string that describes the group member.
*/
@NonNull String describe(@NonNull UUID uuid);
}
}