package.esm2022.src.pipes.keyvalue_pipe.mjs Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of common Show documentation
Show all versions of common Show documentation
Angular - commonly needed directives and services
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.dev/license
*/
import { KeyValueDiffers, Pipe, } from '@angular/core';
import * as i0 from "@angular/core";
function makeKeyValuePair(key, value) {
return { key: key, value: value };
}
/**
* @ngModule CommonModule
* @description
*
* Transforms Object or Map into an array of key value pairs.
*
* The output array will be ordered by keys.
* By default the comparator will be by Unicode point value.
* You can optionally pass a compareFn if your keys are complex types.
*
* @usageNotes
* ### Examples
*
* This examples show how an Object or a Map can be iterated by ngFor with the use of this
* keyvalue pipe.
*
* {@example common/pipes/ts/keyvalue_pipe.ts region='KeyValuePipe'}
*
* @publicApi
*/
export class KeyValuePipe {
constructor(differs) {
this.differs = differs;
this.keyValues = [];
this.compareFn = defaultComparator;
}
transform(input, compareFn = defaultComparator) {
if (!input || (!(input instanceof Map) && typeof input !== 'object')) {
return null;
}
// make a differ for whatever type we've been passed in
this.differ ??= this.differs.find(input).create();
const differChanges = this.differ.diff(input);
const compareFnChanged = compareFn !== this.compareFn;
if (differChanges) {
this.keyValues = [];
differChanges.forEachItem((r) => {
this.keyValues.push(makeKeyValuePair(r.key, r.currentValue));
});
}
if (differChanges || compareFnChanged) {
this.keyValues.sort(compareFn);
this.compareFn = compareFn;
}
return this.keyValues;
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.2.6", ngImport: i0, type: KeyValuePipe, deps: [{ token: i0.KeyValueDiffers }], target: i0.ɵɵFactoryTarget.Pipe }); }
static { this.ɵpipe = i0.ɵɵngDeclarePipe({ minVersion: "14.0.0", version: "18.2.6", ngImport: i0, type: KeyValuePipe, isStandalone: true, name: "keyvalue", pure: false }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.2.6", ngImport: i0, type: KeyValuePipe, decorators: [{
type: Pipe,
args: [{
name: 'keyvalue',
pure: false,
standalone: true,
}]
}], ctorParameters: () => [{ type: i0.KeyValueDiffers }] });
export function defaultComparator(keyValueA, keyValueB) {
const a = keyValueA.key;
const b = keyValueB.key;
// if same exit with 0;
if (a === b)
return 0;
// make sure that undefined are at the end of the sort.
if (a === undefined)
return 1;
if (b === undefined)
return -1;
// make sure that nulls are at the end of the sort.
if (a === null)
return 1;
if (b === null)
return -1;
if (typeof a == 'string' && typeof b == 'string') {
return a < b ? -1 : 1;
}
if (typeof a == 'number' && typeof b == 'number') {
return a - b;
}
if (typeof a == 'boolean' && typeof b == 'boolean') {
return a < b ? -1 : 1;
}
// `a` and `b` are of different types. Compare their string values.
const aString = String(a);
const bString = String(b);
return aString == bString ? 0 : aString < bString ? -1 : 1;
}
//# sourceMappingURL=data:application/json;base64,{"version":3,"file":"keyvalue_pipe.js","sourceRoot":"","sources":["../../../../../../../packages/common/src/pipes/keyvalue_pipe.ts"],"names":[],"mappings":"AAAA;;;;;;GAMG;AAEH,OAAO,EAIL,eAAe,EACf,IAAI,GAEL,MAAM,eAAe,CAAC;;AAEvB,SAAS,gBAAgB,CAAO,GAAM,EAAE,KAAQ;IAC9C,OAAO,EAAC,GAAG,EAAE,GAAG,EAAE,KAAK,EAAE,KAAK,EAAC,CAAC;AAClC,CAAC;AAaD;;;;;;;;;;;;;;;;;;;GAmBG;AAMH,MAAM,OAAO,YAAY;IACvB,YAA6B,OAAwB;QAAxB,YAAO,GAAP,OAAO,CAAiB;QAG7C,cAAS,GAA8B,EAAE,CAAC;QAC1C,cAAS,GAA6D,iBAAiB,CAAC;IAJxC,CAAC;IAuCzD,SAAS,CACP,KAAkF,EAClF,YAA8D,iBAAiB;QAE/E,IAAI,CAAC,KAAK,IAAI,CAAC,CAAC,CAAC,KAAK,YAAY,GAAG,CAAC,IAAI,OAAO,KAAK,KAAK,QAAQ,CAAC,EAAE,CAAC;YACrE,OAAO,IAAI,CAAC;QACd,CAAC;QAED,uDAAuD;QACvD,IAAI,CAAC,MAAM,KAAK,IAAI,CAAC,OAAO,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC,MAAM,EAAE,CAAC;QAElD,MAAM,aAAa,GAAiC,IAAI,CAAC,MAAM,CAAC,IAAI,CAAC,KAAY,CAAC,CAAC;QACnF,MAAM,gBAAgB,GAAG,SAAS,KAAK,IAAI,CAAC,SAAS,CAAC;QAEtD,IAAI,aAAa,EAAE,CAAC;YAClB,IAAI,CAAC,SAAS,GAAG,EAAE,CAAC;YACpB,aAAa,CAAC,WAAW,CAAC,CAAC,CAA6B,EAAE,EAAE;gBAC1D,IAAI,CAAC,SAAS,CAAC,IAAI,CAAC,gBAAgB,CAAC,CAAC,CAAC,GAAG,EAAE,CAAC,CAAC,YAAa,CAAC,CAAC,CAAC;YAChE,CAAC,CAAC,CAAC;QACL,CAAC;QACD,IAAI,aAAa,IAAI,gBAAgB,EAAE,CAAC;YACtC,IAAI,CAAC,SAAS,CAAC,IAAI,CAAC,SAAS,CAAC,CAAC;YAC/B,IAAI,CAAC,SAAS,GAAG,SAAS,CAAC;QAC7B,CAAC;QACD,OAAO,IAAI,CAAC,SAAS,CAAC;IACxB,CAAC;yHAjEU,YAAY;uHAAZ,YAAY;;sGAAZ,YAAY;kBALxB,IAAI;mBAAC;oBACJ,IAAI,EAAE,UAAU;oBAChB,IAAI,EAAE,KAAK;oBACX,UAAU,EAAE,IAAI;iBACjB;;AAqED,MAAM,UAAU,iBAAiB,CAC/B,SAAyB,EACzB,SAAyB;IAEzB,MAAM,CAAC,GAAG,SAAS,CAAC,GAAG,CAAC;IACxB,MAAM,CAAC,GAAG,SAAS,CAAC,GAAG,CAAC;IACxB,uBAAuB;IACvB,IAAI,CAAC,KAAK,CAAC;QAAE,OAAO,CAAC,CAAC;IACtB,uDAAuD;IACvD,IAAI,CAAC,KAAK,SAAS;QAAE,OAAO,CAAC,CAAC;IAC9B,IAAI,CAAC,KAAK,SAAS;QAAE,OAAO,CAAC,CAAC,CAAC;IAC/B,mDAAmD;IACnD,IAAI,CAAC,KAAK,IAAI;QAAE,OAAO,CAAC,CAAC;IACzB,IAAI,CAAC,KAAK,IAAI;QAAE,OAAO,CAAC,CAAC,CAAC;IAC1B,IAAI,OAAO,CAAC,IAAI,QAAQ,IAAI,OAAO,CAAC,IAAI,QAAQ,EAAE,CAAC;QACjD,OAAO,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;IACxB,CAAC;IACD,IAAI,OAAO,CAAC,IAAI,QAAQ,IAAI,OAAO,CAAC,IAAI,QAAQ,EAAE,CAAC;QACjD,OAAO,CAAC,GAAG,CAAC,CAAC;IACf,CAAC;IACD,IAAI,OAAO,CAAC,IAAI,SAAS,IAAI,OAAO,CAAC,IAAI,SAAS,EAAE,CAAC;QACnD,OAAO,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;IACxB,CAAC;IACD,mEAAmE;IACnE,MAAM,OAAO,GAAG,MAAM,CAAC,CAAC,CAAC,CAAC;IAC1B,MAAM,OAAO,GAAG,MAAM,CAAC,CAAC,CAAC,CAAC;IAC1B,OAAO,OAAO,IAAI,OAAO,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,OAAO,GAAG,OAAO,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;AAC7D,CAAC","sourcesContent":["/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.dev/license\n */\n\nimport {\n  KeyValueChangeRecord,\n  KeyValueChanges,\n  KeyValueDiffer,\n  KeyValueDiffers,\n  Pipe,\n  PipeTransform,\n} from '@angular/core';\n\nfunction makeKeyValuePair<K, V>(key: K, value: V): KeyValue<K, V> {\n  return {key: key, value: value};\n}\n\n/**\n * A key value pair.\n * Usually used to represent the key value pairs from a Map or Object.\n *\n * @publicApi\n */\nexport interface KeyValue<K, V> {\n  key: K;\n  value: V;\n}\n\n/**\n * @ngModule CommonModule\n * @description\n *\n * Transforms Object or Map into an array of key value pairs.\n *\n * The output array will be ordered by keys.\n * By default the comparator will be by Unicode point value.\n * You can optionally pass a compareFn if your keys are complex types.\n *\n * @usageNotes\n * ### Examples\n *\n * This examples show how an Object or a Map can be iterated by ngFor with the use of this\n * keyvalue pipe.\n *\n * {@example common/pipes/ts/keyvalue_pipe.ts region='KeyValuePipe'}\n *\n * @publicApi\n */\n@Pipe({\n  name: 'keyvalue',\n  pure: false,\n  standalone: true,\n})\nexport class KeyValuePipe implements PipeTransform {\n  constructor(private readonly differs: KeyValueDiffers) {}\n\n  private differ!: KeyValueDiffer<any, any>;\n  private keyValues: Array<KeyValue<any, any>> = [];\n  private compareFn: (a: KeyValue<any, any>, b: KeyValue<any, any>) => number = defaultComparator;\n\n  /*\n   * NOTE: when the `input` value is a simple Record<K, V> object, the keys are extracted with\n   * Object.keys(). This means that even if the `input` type is Record<number, V> the keys are\n   * compared/returned as `string`s.\n   */\n  transform<K, V>(\n    input: ReadonlyMap<K, V>,\n    compareFn?: (a: KeyValue<K, V>, b: KeyValue<K, V>) => number,\n  ): Array<KeyValue<K, V>>;\n  transform<K extends number, V>(\n    input: Record<K, V>,\n    compareFn?: (a: KeyValue<string, V>, b: KeyValue<string, V>) => number,\n  ): Array<KeyValue<string, V>>;\n  transform<K extends string, V>(\n    input: Record<K, V> | ReadonlyMap<K, V>,\n    compareFn?: (a: KeyValue<K, V>, b: KeyValue<K, V>) => number,\n  ): Array<KeyValue<K, V>>;\n  transform(\n    input: null | undefined,\n    compareFn?: (a: KeyValue<unknown, unknown>, b: KeyValue<unknown, unknown>) => number,\n  ): null;\n  transform<K, V>(\n    input: ReadonlyMap<K, V> | null | undefined,\n    compareFn?: (a: KeyValue<K, V>, b: KeyValue<K, V>) => number,\n  ): Array<KeyValue<K, V>> | null;\n  transform<K extends number, V>(\n    input: Record<K, V> | null | undefined,\n    compareFn?: (a: KeyValue<string, V>, b: KeyValue<string, V>) => number,\n  ): Array<KeyValue<string, V>> | null;\n  transform<K extends string, V>(\n    input: Record<K, V> | ReadonlyMap<K, V> | null | undefined,\n    compareFn?: (a: KeyValue<K, V>, b: KeyValue<K, V>) => number,\n  ): Array<KeyValue<K, V>> | null;\n  transform<K, V>(\n    input: undefined | null | {[key: string]: V; [key: number]: V} | ReadonlyMap<K, V>,\n    compareFn: (a: KeyValue<K, V>, b: KeyValue<K, V>) => number = defaultComparator,\n  ): Array<KeyValue<K, V>> | null {\n    if (!input || (!(input instanceof Map) && typeof input !== 'object')) {\n      return null;\n    }\n\n    // make a differ for whatever type we've been passed in\n    this.differ ??= this.differs.find(input).create();\n\n    const differChanges: KeyValueChanges<K, V> | null = this.differ.diff(input as any);\n    const compareFnChanged = compareFn !== this.compareFn;\n\n    if (differChanges) {\n      this.keyValues = [];\n      differChanges.forEachItem((r: KeyValueChangeRecord<K, V>) => {\n        this.keyValues.push(makeKeyValuePair(r.key, r.currentValue!));\n      });\n    }\n    if (differChanges || compareFnChanged) {\n      this.keyValues.sort(compareFn);\n      this.compareFn = compareFn;\n    }\n    return this.keyValues;\n  }\n}\n\nexport function defaultComparator<K, V>(\n  keyValueA: KeyValue<K, V>,\n  keyValueB: KeyValue<K, V>,\n): number {\n  const a = keyValueA.key;\n  const b = keyValueB.key;\n  // if same exit with 0;\n  if (a === b) return 0;\n  // make sure that undefined are at the end of the sort.\n  if (a === undefined) return 1;\n  if (b === undefined) return -1;\n  // make sure that nulls are at the end of the sort.\n  if (a === null) return 1;\n  if (b === null) return -1;\n  if (typeof a == 'string' && typeof b == 'string') {\n    return a < b ? -1 : 1;\n  }\n  if (typeof a == 'number' && typeof b == 'number') {\n    return a - b;\n  }\n  if (typeof a == 'boolean' && typeof b == 'boolean') {\n    return a < b ? -1 : 1;\n  }\n  // `a` and `b` are of different types. Compare their string values.\n  const aString = String(a);\n  const bString = String(b);\n  return aString == bString ? 0 : aString < bString ? -1 : 1;\n}\n"]}