@ngxs/store
Version:
230 lines • 21.2 kB
JavaScript
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
import * as tslib_1 from "tslib";
import { memoize } from '@ngxs/store/internals';
import { ensureSelectorMetadata, getSelectorMetadata, getStoreMetadata } from '../internal/internals';
/** @type {?} */
var SELECTOR_OPTIONS_META_KEY = 'NGXS_SELECTOR_OPTIONS_META';
/** @type {?} */
export var selectorOptionsMetaAccessor = {
getOptions: (/**
* @param {?} target
* @return {?}
*/
function (target) {
return (target && ((/** @type {?} */ (target)))[SELECTOR_OPTIONS_META_KEY]) || {};
}),
defineOptions: (/**
* @param {?} target
* @param {?} options
* @return {?}
*/
function (target, options) {
if (!target)
return;
((/** @type {?} */ (target)))[SELECTOR_OPTIONS_META_KEY] = options;
})
};
/**
* @record
*/
function CreationMetadata() { }
if (false) {
/** @type {?} */
CreationMetadata.prototype.containerClass;
/** @type {?} */
CreationMetadata.prototype.selectorName;
/** @type {?|undefined} */
CreationMetadata.prototype.getSelectorOptions;
}
/**
* @record
*/
function RuntimeSelectorInfo() { }
if (false) {
/** @type {?} */
RuntimeSelectorInfo.prototype.selectorOptions;
/** @type {?} */
RuntimeSelectorInfo.prototype.argumentSelectorFunctions;
}
/**
* Function for creating a selector
* @template T
* @param {?} selectors The selectors to use to create the arguments of this function
* @param {?} originalFn The original function being made into a selector
* @param {?=} creationMetadata
* @return {?}
*/
export function createSelector(selectors, originalFn, creationMetadata) {
/** @type {?} */
var containerClass = creationMetadata && creationMetadata.containerClass;
/** @type {?} */
var wrappedFn = (/** @type {?} */ ((/**
* @param {...?} args
* @return {?}
*/
function wrappedSelectorFn() {
var args = [];
for (var _i = 0; _i < arguments.length; _i++) {
args[_i] = arguments[_i];
}
/** @type {?} */
var returnValue = originalFn.apply(containerClass, args);
if (returnValue instanceof Function) {
/** @type {?} */
var innerMemoizedFn = memoize.apply(null, [returnValue]);
return innerMemoizedFn;
}
return returnValue;
})));
/** @type {?} */
var memoizedFn = memoize(wrappedFn);
Object.setPrototypeOf(memoizedFn, originalFn);
/** @type {?} */
var selectorMetaData = setupSelectorMetadata(originalFn, creationMetadata);
/** @type {?} */
var makeRootSelector = (/**
* @param {?} context
* @return {?}
*/
function (context) {
var _a = getRuntimeSelectorInfo(context, selectorMetaData, selectors), argumentSelectorFunctions = _a.argumentSelectorFunctions, selectorOptions = _a.selectorOptions;
return (/**
* @param {?} rootState
* @return {?}
*/
function selectFromRoot(rootState) {
// Determine arguments from the app state using the selectors
/** @type {?} */
var results = argumentSelectorFunctions.map((/**
* @param {?} argFn
* @return {?}
*/
function (argFn) { return argFn(rootState); }));
// if the lambda tries to access a something on the
// state that doesn't exist, it will throw a TypeError.
// since this is quite usual behaviour, we simply return undefined if so.
try {
return memoizedFn.apply(void 0, tslib_1.__spread(results));
}
catch (ex) {
if (ex instanceof TypeError && selectorOptions.suppressErrors) {
return undefined;
}
throw ex;
}
});
});
selectorMetaData.makeRootSelector = makeRootSelector;
return memoizedFn;
}
/**
* @template T
* @param {?} originalFn
* @param {?} creationMetadata
* @return {?}
*/
function setupSelectorMetadata(originalFn, creationMetadata) {
/** @type {?} */
var selectorMetaData = ensureSelectorMetadata(originalFn);
selectorMetaData.originalFn = originalFn;
/** @type {?} */
var getExplicitSelectorOptions = (/**
* @return {?}
*/
function () { return ({}); });
if (creationMetadata) {
selectorMetaData.containerClass = creationMetadata.containerClass;
selectorMetaData.selectorName = creationMetadata.selectorName;
getExplicitSelectorOptions =
creationMetadata.getSelectorOptions || getExplicitSelectorOptions;
}
/** @type {?} */
var selectorMetaDataClone = tslib_1.__assign({}, selectorMetaData);
selectorMetaData.getSelectorOptions = (/**
* @return {?}
*/
function () {
return getLocalSelectorOptions(selectorMetaDataClone, getExplicitSelectorOptions());
});
return selectorMetaData;
}
/**
* @param {?} context
* @param {?} selectorMetaData
* @param {?=} selectors
* @return {?}
*/
function getRuntimeSelectorInfo(context, selectorMetaData, selectors) {
if (selectors === void 0) { selectors = []; }
/** @type {?} */
var localSelectorOptions = selectorMetaData.getSelectorOptions();
/** @type {?} */
var selectorOptions = context.getSelectorOptions(localSelectorOptions);
/** @type {?} */
var selectorsToApply = getSelectorsToApply(selectors, selectorOptions, selectorMetaData.containerClass);
/** @type {?} */
var argumentSelectorFunctions = selectorsToApply.map((/**
* @param {?} selector
* @return {?}
*/
function (selector) {
/** @type {?} */
var factory = getRootSelectorFactory(selector);
return factory(context);
}));
return {
selectorOptions: selectorOptions,
argumentSelectorFunctions: argumentSelectorFunctions
};
}
/**
* @param {?} selectorMetaData
* @param {?} explicitOptions
* @return {?}
*/
function getLocalSelectorOptions(selectorMetaData, explicitOptions) {
return tslib_1.__assign({}, (selectorOptionsMetaAccessor.getOptions(selectorMetaData.containerClass) || {}), (selectorOptionsMetaAccessor.getOptions(selectorMetaData.originalFn) || {}), (selectorMetaData.getSelectorOptions() || {}), explicitOptions);
}
/**
* @param {?=} selectors
* @param {?=} selectorOptions
* @param {?=} containerClass
* @return {?}
*/
function getSelectorsToApply(selectors, selectorOptions, containerClass) {
if (selectors === void 0) { selectors = []; }
/** @type {?} */
var selectorsToApply = [];
/** @type {?} */
var canInjectContainerState = selectors.length === 0 || selectorOptions.injectContainerState;
if (containerClass && canInjectContainerState) {
// If we are on a state class, add it as the first selector parameter
/** @type {?} */
var metadata = getStoreMetadata(containerClass);
if (metadata) {
selectorsToApply.push(containerClass);
}
}
if (selectors) {
selectorsToApply.push.apply(selectorsToApply, tslib_1.__spread(selectors));
}
return selectorsToApply;
}
/**
* This function gets the factory function to create the selector to get the selected slice from the app state
* @ignore
* @param {?} selector
* @return {?}
*/
export function getRootSelectorFactory(selector) {
/** @type {?} */
var metadata = getSelectorMetadata(selector) || getStoreMetadata(selector);
return (metadata && metadata.makeRootSelector) || ((/**
* @return {?}
*/
function () { return selector; }));
}
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{ memoize } from '@ngxs/store/internals';\r\n\r\nimport {\r\n  ensureSelectorMetadata,\r\n  getSelectorMetadata,\r\n  getStoreMetadata,\r\n  SelectorMetaDataModel,\r\n  SharedSelectorOptions,\r\n  RuntimeSelectorContext,\r\n  SelectorFactory,\r\n  SelectFromRootState\r\n} from '../internal/internals';\r\n\r\nconst SELECTOR_OPTIONS_META_KEY = 'NGXS_SELECTOR_OPTIONS_META';\r\n\r\nexport const selectorOptionsMetaAccessor = {\r\n  getOptions: (target: any): SharedSelectorOptions => {\r\n    return (target && (<any>target)[SELECTOR_OPTIONS_META_KEY]) || {};\r\n  },\r\n  defineOptions: (target: any, options: SharedSelectorOptions) => {\r\n    if (!target) return;\r\n    (<any>target)[SELECTOR_OPTIONS_META_KEY] = options;\r\n  }\r\n};\r\n\r\ninterface CreationMetadata {\r\n  containerClass: any;\r\n  selectorName: string;\r\n  getSelectorOptions?: () => SharedSelectorOptions;\r\n}\r\n\r\ninterface RuntimeSelectorInfo {\r\n  selectorOptions: SharedSelectorOptions;\r\n  argumentSelectorFunctions: SelectFromRootState[];\r\n}\r\n\r\n/**\r\n * Function for creating a selector\r\n * @param selectors The selectors to use to create the arguments of this function\r\n * @param originalFn The original function being made into a selector\r\n * @param creationMetadata\r\n */\r\nexport function createSelector<T extends (...args: any[]) => any>(\r\n  selectors: any[] | undefined,\r\n  originalFn: T,\r\n  creationMetadata?: CreationMetadata\r\n) {\r\n  const containerClass = creationMetadata && creationMetadata.containerClass;\r\n  const wrappedFn = function wrappedSelectorFn(...args: any[]) {\r\n    const returnValue = originalFn.apply(containerClass, args);\r\n    if (returnValue instanceof Function) {\r\n      const innerMemoizedFn = memoize.apply(null, [returnValue]);\r\n      return innerMemoizedFn;\r\n    }\r\n    return returnValue;\r\n  } as T;\r\n  const memoizedFn = memoize(wrappedFn);\r\n  Object.setPrototypeOf(memoizedFn, originalFn);\r\n\r\n  const selectorMetaData = setupSelectorMetadata<T>(originalFn, creationMetadata);\r\n\r\n  const makeRootSelector: SelectorFactory = (context: RuntimeSelectorContext) => {\r\n    const { argumentSelectorFunctions, selectorOptions } = getRuntimeSelectorInfo(\r\n      context,\r\n      selectorMetaData,\r\n      selectors\r\n    );\r\n\r\n    return function selectFromRoot(rootState: any) {\r\n      // Determine arguments from the app state using the selectors\r\n      const results = argumentSelectorFunctions.map(argFn => argFn(rootState));\r\n\r\n      // if the lambda tries to access a something on the\r\n      // state that doesn't exist, it will throw a TypeError.\r\n      // since this is quite usual behaviour, we simply return undefined if so.\r\n      try {\r\n        return memoizedFn(...results);\r\n      } catch (ex) {\r\n        if (ex instanceof TypeError && selectorOptions.suppressErrors) {\r\n          return undefined;\r\n        }\r\n\r\n        throw ex;\r\n      }\r\n    };\r\n  };\r\n\r\n  selectorMetaData.makeRootSelector = makeRootSelector;\r\n\r\n  return memoizedFn;\r\n}\r\n\r\nfunction setupSelectorMetadata<T extends (...args: any[]) => any>(\r\n  originalFn: T,\r\n  creationMetadata: CreationMetadata | undefined\r\n) {\r\n  const selectorMetaData = ensureSelectorMetadata(originalFn);\r\n  selectorMetaData.originalFn = originalFn;\r\n  let getExplicitSelectorOptions = () => ({});\r\n  if (creationMetadata) {\r\n    selectorMetaData.containerClass = creationMetadata.containerClass;\r\n    selectorMetaData.selectorName = creationMetadata.selectorName;\r\n    getExplicitSelectorOptions =\r\n      creationMetadata.getSelectorOptions || getExplicitSelectorOptions;\r\n  }\r\n  const selectorMetaDataClone = { ...selectorMetaData };\r\n  selectorMetaData.getSelectorOptions = () =>\r\n    getLocalSelectorOptions(selectorMetaDataClone, getExplicitSelectorOptions());\r\n  return selectorMetaData;\r\n}\r\n\r\nfunction getRuntimeSelectorInfo(\r\n  context: RuntimeSelectorContext,\r\n  selectorMetaData: SelectorMetaDataModel,\r\n  selectors: any[] | undefined = []\r\n): RuntimeSelectorInfo {\r\n  const localSelectorOptions = selectorMetaData.getSelectorOptions();\r\n  const selectorOptions = context.getSelectorOptions(localSelectorOptions);\r\n  const selectorsToApply = getSelectorsToApply(\r\n    selectors,\r\n    selectorOptions,\r\n    selectorMetaData.containerClass\r\n  );\r\n\r\n  const argumentSelectorFunctions = selectorsToApply.map(selector => {\r\n    const factory = getRootSelectorFactory(selector);\r\n    return factory(context);\r\n  });\r\n  return {\r\n    selectorOptions,\r\n    argumentSelectorFunctions\r\n  };\r\n}\r\n\r\nfunction getLocalSelectorOptions(\r\n  selectorMetaData: SelectorMetaDataModel,\r\n  explicitOptions: SharedSelectorOptions\r\n): SharedSelectorOptions {\r\n  return {\r\n    ...(selectorOptionsMetaAccessor.getOptions(selectorMetaData.containerClass) || {}),\r\n    ...(selectorOptionsMetaAccessor.getOptions(selectorMetaData.originalFn) || {}),\r\n    ...(selectorMetaData.getSelectorOptions() || {}),\r\n    ...explicitOptions\r\n  };\r\n}\r\n\r\nfunction getSelectorsToApply(\r\n  selectors: any[] | undefined = [],\r\n  selectorOptions: SharedSelectorOptions,\r\n  containerClass: any\r\n) {\r\n  const selectorsToApply = [];\r\n  const canInjectContainerState =\r\n    selectors.length === 0 || selectorOptions.injectContainerState;\r\n  if (containerClass && canInjectContainerState) {\r\n    // If we are on a state class, add it as the first selector parameter\r\n    const metadata = getStoreMetadata(containerClass);\r\n    if (metadata) {\r\n      selectorsToApply.push(containerClass);\r\n    }\r\n  }\r\n  if (selectors) {\r\n    selectorsToApply.push(...selectors);\r\n  }\r\n  return selectorsToApply;\r\n}\r\n\r\n/**\r\n * This function gets the factory function to create the selector to get the selected slice from the app state\r\n * @ignore\r\n */\r\nexport function getRootSelectorFactory(selector: any): SelectorFactory {\r\n  const metadata = getSelectorMetadata(selector) || getStoreMetadata(selector);\r\n  return (metadata && metadata.makeRootSelector) || (() => selector);\r\n}\r\n"]}