searchMembers.js

class SearchMembers {
  constructor(channel) {
    this.targetChannel = channel;
    this.dictionary = {};
  }

  addQueryUsersToDictionary(users, searchTerm) {
    if (users.length === 0) {
      this.dictionary[searchTerm] = {};
      return;
    }

    users.forEach((user) => {
      for (var i = 1; i <= 10; i++) {
        let dictionaryKey = user.nickname.slice(0, i).toLowerCase();
        const userId = user.userId;
        let entry = {};
        entry[userId] = user;
        if (this.dictionary[dictionaryKey]) {
          entry = this.dictionary[dictionaryKey];
          entry[userId] = user;
        }
        this.dictionary[dictionaryKey] = entry;
      }
    });
  }

  querySendbirdForNicknames(searchTerm) {
    return new Promise((resolve, reject) => {
      let query = this.targetChannel.createMemberListQuery();
      query.nicknameStartsWithFilter = searchTerm;
      query.limit = 100;

      const fetch = () => {
        if (query.hasNext) {
          query.next((users, error) => {
            if (error) reject(error);
            this.addQueryUsersToDictionary(users, searchTerm);
            fetch();
          });
        } else {
          resolve(this.dictionary);
        }
      };
      fetch();
    });
  }

  searchChannelMembers(searchTerm) {
    return new Promise((resolve, reject) => {
      if (searchTerm.length <= 1) reject(null);
      if (this.dictionary[searchTerm]) {
        console.log("CALLED_IN");
        resolve(this.dictionary[searchTerm]);
        return;
      }
      console.log("CALLED OUT");
      this.querySendbirdForNicknames(searchTerm)
        .then((dictionary) => {
          resolve(dictionary[searchTerm]);
        })
        .catch((error) => {
          reject(error);
        });
    });
  }
}

export default SearchMembers;