@sendbird/uikit-utils/src/shared/index.ts

A collection of utility functions and constants for building chat UI components with Sendbird UIKit.

/**
 * Converts a given string to a hashed string.
 * */
export function hash(str: string) {
  return String(Math.abs(str.split('').reduce((a, c) => ((a << 5) - a + c.charCodeAt(0)) | 0, 0)));
}

/**
 * Replace a specific range of text in the string with another text.
 * */
export function replace(str: string, start: number, end: number, text: string) {
  return str.slice(0, start) + text + str.slice(end);
}

/**
 * Returns the value corresponding to the first true index of a given condition array.
 * */
export function conditionChaining<T, V>(conditions: T[], values: V[]) {
  const idx = conditions.findIndex((state) => Boolean(state));
  return idx > -1 ? values[idx] : values[values.length - 1];
}

/**
 * Returns a new object with only the specified keys from the input object.
 *
 * @param {Object} obj - The input object to pick keys from.
 * @param {Array<string>} keys - An array of keys to pick from the input object.
 * @returns {Object} - A new object containing only the specified keys from the input object.
 * @example
 * ```ts
 *   pick({ a: 1, b: '2', c: true }, ['a', 'c']); // returns { a: 1, c: true }
 * ```
 */
export function pick<T extends { [key: string]: unknown }, Keys extends keyof T>(obj: T, keys: Keys[]) {
  return keys.reduce((pickedObj, key) => {
    pickedObj[key] = obj[key];
    return pickedObj;
  }, {} as { [key in Keys]: T[key] });
}

export function mergeObjectArrays<T>(A: T[], B: T[], key: keyof T): T[] {
  const uniqueValues = new Set(A.map((obj) => obj[key]));
  const newArr = [...A];

  for (let i = 0; i < B.length; i++) {
    if (!uniqueValues.has(B[i][key])) {
      newArr.push(B[i]);
      uniqueValues.add(B[i][key]);
    }
  }

  return newArr;
}

export function sleep(ms: number) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

export function matchesOneOf<V, C extends V[]>(value: V, candidates: C) {
  return candidates.includes(value);
}