src/contacts/ContactCache.js

import Hashes from 'jshashes';
import {
	getItem,
	setItem,
	removeItem,
} from '../utils';

const VALID_CACHE = 'validCache';
const SAVED_USER = 'savedUser';
const SAVED_DEVICE_CONTACTS = 'savedDeviceContacts';
const SAVED_DEVICE_WAC_CONTACTS = 'savedDeviceWacContacts';
const SAVED_WAC_CONTACTS = 'savedWacContacts';
const HASH_DEVICE_CONTACTS = 'hashDeviceContacts';
const HASH_WAC_CONTACTS = 'hashWacContacts';
const SAVED_AVATAR_DEVICE_CONTACTS = 'savedAvatarDeviceContacts';
const SAVED_FAVORITE_CONTACTS = 'favoriteContacts';

function doHash(data) {
	let md5 = new Hashes.MD5();
	return md5.hex(JSON.stringify(data));
}

/** @private */
export function getDeviceWacContacts() {
	return getItem(SAVED_DEVICE_WAC_CONTACTS);
}

/** @private */
export function setDeviceWacContacts(deviceWacContacts) {
	setItem(SAVED_DEVICE_WAC_CONTACTS, deviceWacContacts);
}

/** @private */
export function setAvatarDeviceContacts(avatars) {
	setItem(SAVED_AVATAR_DEVICE_CONTACTS, avatars);
}

/** @private */
export function getAvatarDeviceContacts() {
	return getItem(SAVED_AVATAR_DEVICE_CONTACTS);
}

/** @private */
export function setWacContacts(wacContacts) {
	setItem(SAVED_WAC_CONTACTS, wacContacts);
	setItem(HASH_WAC_CONTACTS, doHash(wacContacts));
}

/** @private */
export function getWacContacts() {
	return getItem(SAVED_WAC_CONTACTS);
}

/** @private */
export function setDeviceContacts(deviceContacts) {
	setItem(HASH_DEVICE_CONTACTS, doHash(deviceContacts));
	setItem(SAVED_DEVICE_CONTACTS, deviceContacts);
}

/** @private */
export function validateCache() {
	setItem(VALID_CACHE, true);
}

/** @private */
export function invalidateCache() {
	setItem(VALID_CACHE, false);
	removeItem(SAVED_DEVICE_CONTACTS);
	removeItem(HASH_DEVICE_CONTACTS);
	removeItem(SAVED_AVATAR_DEVICE_CONTACTS);
}

/** @private */
export function isValidCache() {
	return getItem(VALID_CACHE);
}

/** @private */
export function isCacheUpdated(deviceContacts) {
	let hashSavedContacts = getItem(HASH_DEVICE_CONTACTS);
	let hashDeviceContacts = doHash(deviceContacts);
	return hashSavedContacts === hashDeviceContacts;
}

/** @private */
export function getFavoriteContacts() {
	return getItem(SAVED_FAVORITE_CONTACTS);
}

/** @private */
export function updateFavoriteContacts(favorites) {
	setItem(SAVED_FAVORITE_CONTACTS, favorites);
}

/** @private */
export function emptyAllContactData() {
	removeItem(SAVED_DEVICE_WAC_CONTACTS);
	removeItem(SAVED_WAC_CONTACTS);
	removeItem(HASH_WAC_CONTACTS);
	removeItem(SAVED_USER);
	invalidateCache();
}

/** @private */
export function invalidateCacheIfNeeded(stack) {
	if (stack.getCurrentSession().user === getItem(SAVED_USER)) {
		return;
	}
	emptyAllContactData();
	setItem(SAVED_USER, stack.getCurrentSession().user);
}