@notesnook/localforage-getitems/lib/getitems-generic.js

Adds getItems method to localForage.

import { getItemKeyValue } from "./utils";

export function getItemsGeneric(keys /*, callback*/) {
  var localforageInstance = this;
  var promise = new Promise(function(resolve, reject) {
    var itemPromises = [];

    for (var i = 0, len = keys.length; i < len; i++) {
      itemPromises.push(getItemKeyValue.call(localforageInstance, keys[i]));
    }

    Promise.all(itemPromises)
      .then(function(keyValuePairs) {
        var result = [];
        for (var i = 0, len = keyValuePairs.length; i < len; i++) {
          var keyValuePair = keyValuePairs[i];

          result.push([keyValuePair.key, keyValuePair.value]);
        }
        resolve(result);
      })
      .catch(reject);
  });
  return promise;
}

export function getAllItemsUsingKeys() {
  var localforageInstance = this;
  return localforageInstance.keys().then(function(keys) {
    return localforageInstance.getItems(keys);
  });
}

export function getAllItemsUsingKeysParallel() {
  var localforageInstance = this;
  return localforageInstance.keys().then(function(keys) {
    var itemPromises = [];
    for (var i = 0, len = keys.length; i < len; i++) {
      itemPromises.push(localforageInstance.getItem(keys[i]));
    }
    return Promise.all(itemPromises);
  });
}

export function getAllItemsUsingIterate() {
  var localforageInstance = this;
  var accumulator = {};
  return localforageInstance
    .iterate(function(value, key /*, iterationNumber*/) {
      accumulator[key] = value;
    })
    .then(function() {
      return accumulator;
    });
}