session-desktop/ts/receiver/configMessage.ts

import _ from 'lodash';
import { Data, hasSyncedInitialConfigurationItem } from '../data/data';
import {
  joinOpenGroupV2WithUIEvents,
  parseOpenGroupV2,
} from '../session/apis/open_group_api/opengroupV2/JoinOpenGroupV2';
import { getOpenGroupV2ConversationId } from '../session/apis/open_group_api/utils/OpenGroupUtils';
import { SignalService } from '../protobuf';
import { getConversationController } from '../session/conversations';
import { UserUtils } from '../session/utils';
import { toHex } from '../session/utils/String';
import { configurationMessageReceived, trigger } from '../shims/events';
import { BlockedNumberController } from '../util';
import { removeFromCache } from './cache';
import { handleNewClosedGroup } from './closedGroups';
import { EnvelopePlus } from './types';
import { ConversationInteraction } from '../interactions';
import { getLastProfileUpdateTimestamp, setLastProfileUpdateTimestamp } from '../util/storage';
import { appendFetchAvatarAndProfileJob, updateOurProfileSync } from './userProfileImageUpdates';
import { ConversationTypeEnum } from '../models/conversationAttributes';

async function handleOurProfileUpdate(
  sentAt: number | Long,
  configMessage: SignalService.ConfigurationMessage
) {
  const latestProfileUpdateTimestamp = getLastProfileUpdateTimestamp();
  if (!latestProfileUpdateTimestamp || sentAt > latestProfileUpdateTimestamp) {
    window?.log?.info(
      `Handling our profileUdpate ourLastUpdate:${latestProfileUpdateTimestamp}, envelope sent at: ${sentAt}`
    );
    const { profileKey, profilePicture, displayName } = configMessage;

    const lokiProfile = {
      displayName,
      profilePicture,
    };
    await updateOurProfileSync(lokiProfile, profileKey);
    await setLastProfileUpdateTimestamp(_.toNumber(sentAt));
    // do not trigger a signin by linking if the display name is empty
    if (displayName) {
      trigger(configurationMessageReceived, displayName);
    } else {
      window?.log?.warn('Got a configuration message but the display name is empty');
    }
  }
}

async function handleGroupsAndContactsFromConfigMessage(
  envelope: EnvelopePlus,
  configMessage: SignalService.ConfigurationMessage
) {
  const envelopeTimestamp = _.toNumber(envelope.timestamp);
  const lastConfigUpdate = await Data.getItemById(hasSyncedInitialConfigurationItem);
  const lastConfigTimestamp = lastConfigUpdate?.timestamp;
  const isNewerConfig =
    !lastConfigTimestamp || (lastConfigTimestamp && lastConfigTimestamp < envelopeTimestamp);

  if (!isNewerConfig) {
    window?.log?.info('Received outdated configuration message... Dropping message.');
    return;
  }

  await Data.createOrUpdateItem({
    id: 'hasSyncedInitialConfigurationItem',
    value: true,
    timestamp: envelopeTimestamp,
  });

  // we only want to apply changes to closed groups if we never got them
  // new opengroups get added when we get a new closed group message from someone, or a sync'ed message from outself creating the group
  if (!lastConfigTimestamp) {
    await handleClosedGroupsFromConfig(configMessage.closedGroups, envelope);
  }

  handleOpenGroupsFromConfig(configMessage.openGroups);

  if (configMessage.contacts?.length) {
    await Promise.all(configMessage.contacts.map(async c => handleContactFromConfig(c, envelope)));
  }
}

/**
 * Trigger a join for all open groups we are not already in.
 * @param openGroups string array of open group urls
 */
const handleOpenGroupsFromConfig = (openGroups: Array<string>) => {
  const numberOpenGroup = openGroups?.length || 0;
  for (let i = 0; i < numberOpenGroup; i++) {
    const currentOpenGroupUrl = openGroups[i];
    const parsedRoom = parseOpenGroupV2(currentOpenGroupUrl);
    if (!parsedRoom) {
      continue;
    }
    const roomConvoId = getOpenGroupV2ConversationId(parsedRoom.serverUrl, parsedRoom.roomId);
    if (!getConversationController().get(roomConvoId)) {
      window?.log?.info(
        `triggering join of public chat '${currentOpenGroupUrl}' from ConfigurationMessage`
      );
      void joinOpenGroupV2WithUIEvents(currentOpenGroupUrl, false, true);
    }
  }
};

/**
 * Trigger a join for all closed groups which doesn't exist yet
 * @param openGroups string array of open group urls
 */
const handleClosedGroupsFromConfig = async (
  closedGroups: Array<SignalService.ConfigurationMessage.IClosedGroup>,
  envelope: EnvelopePlus
) => {
  const numberClosedGroup = closedGroups?.length || 0;

  window?.log?.info(
    `Received ${numberClosedGroup} closed group on configuration. Creating them... `
  );
  await Promise.all(
    closedGroups.map(async c => {
      const groupUpdate = new SignalService.DataMessage.ClosedGroupControlMessage({
        type: SignalService.DataMessage.ClosedGroupControlMessage.Type.NEW,
        encryptionKeyPair: c.encryptionKeyPair,
        name: c.name,
        admins: c.admins,
        members: c.members,
        publicKey: c.publicKey,
      });
      try {
        // TODO we should not drop the envelope from cache as long as we are still handling a new closed group from that same envelope
        // check the removeFromCache inside handleNewClosedGroup()
        await handleNewClosedGroup(envelope, groupUpdate);
      } catch (e) {
        window?.log?.warn('failed to handle  a new closed group from configuration message');
      }
    })
  );
};

/**
 * Handles adding of a contact and setting approval/block status
 * @param contactReceived Contact to sync
 */
const handleContactFromConfig = async (
  contactReceived: SignalService.ConfigurationMessage.IContact,
  envelope: EnvelopePlus
) => {
  try {
    if (!contactReceived.publicKey?.length) {
      return;
    }
    const contactConvo = await getConversationController().getOrCreateAndWait(
      toHex(contactReceived.publicKey),
      ConversationTypeEnum.PRIVATE
    );
    const profileInDataMessage: SignalService.DataMessage.ILokiProfile = {
      displayName: contactReceived.name,
      profilePicture: contactReceived.profilePicture,
    };

    const existingActiveAt = contactConvo.get('active_at');
    if (!existingActiveAt || existingActiveAt === 0) {
      contactConvo.set('active_at', _.toNumber(envelope.timestamp));
    }

    // checking for existence of field on protobuf
    if (contactReceived.isApproved === true) {
      if (!contactConvo.isApproved()) {
        await contactConvo.setIsApproved(Boolean(contactReceived.isApproved));
        await contactConvo.addOutgoingApprovalMessage(_.toNumber(envelope.timestamp));
      }

      if (contactReceived.didApproveMe === true) {
        // checking for existence of field on message
        await contactConvo.setDidApproveMe(Boolean(contactReceived.didApproveMe));
      }
    }

    // only set for explicit true/false values in case outdated sender doesn't have the fields
    if (contactReceived.isBlocked === true) {
      if (contactConvo.isIncomingRequest()) {
        // handling case where restored device's declined message requests were getting restored
        await ConversationInteraction.deleteAllMessagesByConvoIdNoConfirmation(contactConvo.id);
      }
      await BlockedNumberController.block(contactConvo.id);
    } else if (contactReceived.isBlocked === false) {
      await BlockedNumberController.unblock(contactConvo.id);
    }

    void appendFetchAvatarAndProfileJob(
      contactConvo,
      profileInDataMessage,
      contactReceived.profileKey
    );
  } catch (e) {
    window?.log?.warn('failed to handle  a new closed group from configuration message');
  }
};

export async function handleConfigurationMessage(
  envelope: EnvelopePlus,
  configurationMessage: SignalService.ConfigurationMessage
): Promise<void> {
  window?.log?.info('Handling configuration message');
  const ourPubkey = UserUtils.getOurPubKeyStrFromCache();
  if (!ourPubkey) {
    return;
  }

  if (envelope.source !== ourPubkey) {
    window?.log?.info('Dropping configuration change from someone else than us.');
    return removeFromCache(envelope);
  }

  await handleOurProfileUpdate(envelope.timestamp, configurationMessage);

  await handleGroupsAndContactsFromConfigMessage(envelope, configurationMessage);

  await removeFromCache(envelope);
}