Method getList

api/server/models/Message.ts:148–170

({ userId, chatId, batchNumberForMessages, limit })

class MessageClass extends mongoose.Model {
  public static async getList({ userId, chatId, batchNumberForMessages, limit }) {
    await this.checkPermission({ userId, chatId });

    const filter = { chatId, parentMessageId: null };

    const messages = await this.find(filter)
      .sort({ createdAt: -1, _id: 1 })
      .skip((batchNumberForMessages - 1) * limit)
      .limit(limit)
      .setOptions({ lean: true });

    // use for...of instead of forEach
    // forEach does not care about promises from await
    for (const message of messages) {
      const threadMessages = await this.find({
        parentMessageId: message._id.toString(),
      });

      message.countOfThreadMessages = threadMessages.length;
    }

    return messages;
  }

  public static async getListForThread({ userId, chatId, messageId }) {
    await this.checkPermission({ userId, chatId });