@datorama/akita
Version:
State Management Tailored-Made for JS Applications
161 lines • 13.2 kB
JavaScript
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
import * as tslib_1 from "tslib";
import { coerceArray } from './coerceArray';
import { DEFAULT_ID_KEY } from './defaultIDKey';
import { distinctUntilChanged, map } from 'rxjs/operators';
import { isArray } from './isArray';
import { isFunction } from './isFunction';
import { isEmpty } from './isEmpty';
// @internal
/**
* @template T
* @param {?} collection
* @param {?} idsOrPredicate
* @param {?} idKey
* @return {?}
*/
export function find(collection, idsOrPredicate, idKey) {
var e_1, _a, e_2, _b;
/** @type {?} */
var result = [];
if (isFunction(idsOrPredicate)) {
try {
for (var collection_1 = tslib_1.__values(collection), collection_1_1 = collection_1.next(); !collection_1_1.done; collection_1_1 = collection_1.next()) {
var entity = collection_1_1.value;
if (idsOrPredicate(entity) === true) {
result.push(entity);
}
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (collection_1_1 && !collection_1_1.done && (_a = collection_1.return)) _a.call(collection_1);
}
finally { if (e_1) throw e_1.error; }
}
}
else {
/** @type {?} */
var toSet = coerceArray(idsOrPredicate).reduce((/**
* @param {?} acc
* @param {?} current
* @return {?}
*/
function (acc, current) { return acc.add(current); }), new Set());
try {
for (var collection_2 = tslib_1.__values(collection), collection_2_1 = collection_2.next(); !collection_2_1.done; collection_2_1 = collection_2.next()) {
var entity = collection_2_1.value;
if (toSet.has(entity[idKey])) {
result.push(entity);
}
}
}
catch (e_2_1) { e_2 = { error: e_2_1 }; }
finally {
try {
if (collection_2_1 && !collection_2_1.done && (_b = collection_2.return)) _b.call(collection_2);
}
finally { if (e_2) throw e_2.error; }
}
}
return result;
}
// @internal
/**
* @template T
* @return {?}
*/
export function distinctUntilArrayItemChanged() {
return distinctUntilChanged((/**
* @param {?} prevCollection
* @param {?} currentCollection
* @return {?}
*/
function (prevCollection, currentCollection) {
if (prevCollection === currentCollection) {
return true;
}
if (isArray(prevCollection) === false || isArray(currentCollection) === false) {
return false;
}
if (isEmpty(prevCollection) && isEmpty(currentCollection)) {
return true;
}
// if item is new in the current collection but not exist in the prev collection
/** @type {?} */
var hasNewItem = hasChange(currentCollection, prevCollection);
if (hasNewItem) {
return false;
}
/** @type {?} */
var isOneOfItemReferenceChanged = hasChange(prevCollection, currentCollection);
// return false means there is a change and we want to call next()
return isOneOfItemReferenceChanged === false;
}));
}
// @internal
/**
* @template T
* @param {?} first
* @param {?} second
* @return {?}
*/
function hasChange(first, second) {
/** @type {?} */
var hasChange = second.some((/**
* @param {?} currentItem
* @return {?}
*/
function (currentItem) {
/** @type {?} */
var oldItem = first.find((/**
* @param {?} prevItem
* @return {?}
*/
function (prevItem) { return prevItem === currentItem; }));
return oldItem === undefined;
}));
return hasChange;
}
/**
* @template T
* @param {?} idsOrPredicate
* @param {?=} idKey
* @return {?}
*/
export function arrayFind(idsOrPredicate, idKey) {
return (/**
* @param {?} source
* @return {?}
*/
function (source) {
return source.pipe(map((/**
* @param {?} collection
* @return {?}
*/
function (collection) {
// which means the user deleted the root entity or set the collection to nil
if (isArray(collection) === false) {
return collection;
}
return find(collection, idsOrPredicate, idKey || DEFAULT_ID_KEY);
})), distinctUntilArrayItemChanged(), map((/**
* @param {?} value
* @return {?}
*/
function (value) {
if (isArray(value) === false) {
return value;
}
if (isArray(idsOrPredicate) || isFunction(idsOrPredicate)) {
return value;
}
return value[0];
})));
});
}
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{ IDS, ItemPredicate } from './types';\nimport { coerceArray } from './coerceArray';\nimport { DEFAULT_ID_KEY } from './defaultIDKey';\nimport { distinctUntilChanged, map } from 'rxjs/operators';\nimport { MonoTypeOperatorFunction, Observable } from 'rxjs';\nimport { isArray } from './isArray';\nimport { isFunction } from './isFunction';\nimport { isEmpty } from './isEmpty';\n\n// @internal\nexport function find<T>(collection: T[], idsOrPredicate: IDS | ItemPredicate, idKey: string) {\n  const result = [];\n  if (isFunction(idsOrPredicate)) {\n    for (const entity of collection) {\n      if (idsOrPredicate(entity) === true) {\n        result.push(entity);\n      }\n    }\n  } else {\n    const toSet = coerceArray(idsOrPredicate).reduce((acc, current) => acc.add(current), new Set());\n\n    for (const entity of collection) {\n      if (toSet.has(entity[idKey])) {\n        result.push(entity);\n      }\n    }\n  }\n\n  return result;\n}\n\n// @internal\nexport function distinctUntilArrayItemChanged<T>(): MonoTypeOperatorFunction<T[]> {\n  return distinctUntilChanged((prevCollection: T[], currentCollection: T[]) => {\n    if (prevCollection === currentCollection) {\n      return true;\n    }\n\n    if (isArray(prevCollection) === false || isArray(currentCollection) === false) {\n      return false;\n    }\n\n    if (isEmpty(prevCollection) && isEmpty(currentCollection)) {\n      return true;\n    }\n\n    // if item is new in the current collection but not exist in the prev collection\n    const hasNewItem = hasChange(currentCollection, prevCollection);\n\n    if (hasNewItem) {\n      return false;\n    }\n\n    const isOneOfItemReferenceChanged = hasChange(prevCollection, currentCollection);\n\n    // return false means there is a change and we want to call next()\n    return isOneOfItemReferenceChanged === false;\n  });\n}\n\n// @internal\nfunction hasChange<T>(first: T[], second: T[]) {\n  const hasChange = second.some(currentItem => {\n    const oldItem = first.find(prevItem => prevItem === currentItem);\n    return oldItem === undefined;\n  });\n\n  return hasChange;\n}\n\n/**\n * Find items in a collection\n *\n * @example\n *\n *  selectEntity(1, 'comments').pipe(\n *   arrayFind(comment => comment.text = 'text')\n * )\n */\nexport function arrayFind<T>(ids: ItemPredicate<T>, idKey?: never): (source: Observable<T[]>) => Observable<T[]>;\n/**\n * @example\n *\n * selectEntity(1, 'comments').pipe(\n *   arrayFind(3)\n * )\n */\nexport function arrayFind<T>(ids: number, idKey?: string): (source: Observable<T[]>) => Observable<T>;\n/**\n * @example\n *\n * selectEntity(1, 'comments').pipe(\n *   arrayFind([1, 2, 3])\n * )\n */\nexport function arrayFind<T>(ids: number[], idKey?: string): (source: Observable<T[]>) => Observable<T[]>;\nexport function arrayFind<T>(idsOrPredicate: number[] | number | ItemPredicate<T>, idKey?: string): (source: Observable<T[]>) => Observable<T[] | T> {\n  return function(source: Observable<T[]>) {\n    return source.pipe(\n      map((collection: T[] | undefined | null) => {\n        // which means the user deleted the root entity or set the collection to nil\n        if (isArray(collection) === false) {\n          return collection;\n        }\n        return find(collection, idsOrPredicate, idKey || DEFAULT_ID_KEY);\n      }),\n      distinctUntilArrayItemChanged(),\n      map(value => {\n        if (isArray(value) === false) {\n          return value;\n        }\n\n        if (isArray(idsOrPredicate) || isFunction(idsOrPredicate)) {\n          return value;\n        }\n\n        return value[0];\n      })\n    );\n  };\n}\n"]}