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@ngqp/core

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Synchronizing form controls with the URL for Angular

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import { Directive, ElementRef, forwardRef, HostListener, Renderer2 } from '@angular/core'; import { NG_VALUE_ACCESSOR } from '@angular/forms'; /** @ignore */ const NGQP_MULTI_SELECT_VALUE_ACCESSOR = { provide: NG_VALUE_ACCESSOR, useExisting: forwardRef(() => MultiSelectControlValueAccessorDirective), multi: true }; /** @ignore */ export class MultiSelectControlValueAccessorDirective { constructor(renderer, elementRef) { this.renderer = renderer; this.elementRef = elementRef; this.selectedIds = []; this.options = new Map(); this.optionMap = new Map(); this.idCounter = 0; this.fnChange = (_) => { }; this.fnTouched = () => { }; } onChange() { this.selectedIds = Array.from(this.options.entries()) .filter(([id, option]) => option.selected) .map(([id]) => id); const values = this.selectedIds.map(id => this.optionMap.get(id)); this.fnChange(values); } onTouched() { this.fnTouched(); } writeValue(values) { values = values === null ? [] : values; if (!Array.isArray(values)) { throw new Error(`Provided a non-array value to select[multiple]: ${values}`); } this.selectedIds = values .map(value => this.getOptionId(value)) .filter((id) => id !== null); this.options.forEach((option, id) => option.selected = this.selectedIds.includes(id)); } registerOnChange(fn) { this.fnChange = fn; } registerOnTouched(fn) { this.fnTouched = fn; } setDisabledState(isDisabled) { this.renderer.setProperty(this.elementRef.nativeElement, 'disabled', isDisabled); } registerOption(option) { const newId = (this.idCounter++).toString(); this.options.set(newId, option); return newId; } deregisterOption(id) { this.optionMap.delete(id); } updateOptionValue(id, value) { this.optionMap.set(id, value); if (this.selectedIds.includes(id)) { this.onChange(); } } getOptionId(value) { for (const id of Array.from(this.optionMap.keys())) { if (this.optionMap.get(id) === value) { return id; } } return null; } } MultiSelectControlValueAccessorDirective.decorators = [ { type: Directive, args: [{ selector: 'select[multiple][queryParamName],select[multiple][queryParam]', providers: [NGQP_MULTI_SELECT_VALUE_ACCESSOR], },] } ]; MultiSelectControlValueAccessorDirective.ctorParameters = () => [ { type: Renderer2 }, { type: ElementRef } ]; MultiSelectControlValueAccessorDirective.propDecorators = { onChange: [{ type: HostListener, args: ['change',] }], onTouched: [{ type: HostListener, args: ['blur',] }] }; //# 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{ Directive, ElementRef, forwardRef, HostListener, Provider, Renderer2 } from '@angular/core';\nimport { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';\nimport { MultiSelectOptionDirective } from './multi-select-option.directive';\n\n/** @ignore */\nconst NGQP_MULTI_SELECT_VALUE_ACCESSOR: Provider = {\n    provide: NG_VALUE_ACCESSOR,\n    useExisting: forwardRef(() => MultiSelectControlValueAccessorDirective),\n    multi: true\n};\n\n/** @ignore */\n@Directive({\n    selector: 'select[multiple][queryParamName],select[multiple][queryParam]',\n    providers: [NGQP_MULTI_SELECT_VALUE_ACCESSOR],\n})\nexport class MultiSelectControlValueAccessorDirective<T> implements ControlValueAccessor {\n\n    private selectedIds: string[] = [];\n    private options = new Map<string, MultiSelectOptionDirective<T>>();\n    private optionMap = new Map<string, T>();\n\n    private idCounter = 0;\n    private fnChange = (_: T[]) => {};\n    private fnTouched = () => {};\n\n    @HostListener('change')\n    public onChange() {\n        this.selectedIds = Array.from(this.options.entries())\n            .filter(([id, option]) => option.selected)\n            .map(([id]) => id);\n        const values = this.selectedIds.map(id => this.optionMap.get(id)!);\n        this.fnChange(values);\n    }\n\n    @HostListener('blur')\n    public onTouched() {\n        this.fnTouched();\n    }\n\n    constructor(private renderer: Renderer2, private elementRef: ElementRef<HTMLSelectElement>) {\n    }\n\n    public writeValue(values: T[]) {\n        values = values === null ? <T[]>[] : values;\n        if (!Array.isArray(values)) {\n            throw new Error(`Provided a non-array value to select[multiple]: ${values}`);\n        }\n\n        this.selectedIds = values\n            .map(value => this.getOptionId(value))\n            .filter((id: string | null): id is string => id !== null);\n        this.options.forEach((option, id) => option.selected = this.selectedIds.includes(id));\n    }\n\n    public registerOnChange(fn: any) {\n        this.fnChange = fn;\n    }\n\n    public registerOnTouched(fn: any) {\n        this.fnTouched = fn;\n    }\n\n    public setDisabledState(isDisabled: boolean) {\n        this.renderer.setProperty(this.elementRef.nativeElement, 'disabled', isDisabled);\n    }\n\n    public registerOption(option: MultiSelectOptionDirective<T>): string {\n        const newId = (this.idCounter++).toString();\n        this.options.set(newId, option);\n        return newId;\n    }\n\n    public deregisterOption(id: string): void {\n        this.optionMap.delete(id);\n    }\n\n    public updateOptionValue(id: string, value: T): void {\n        this.optionMap.set(id, value);\n        if (this.selectedIds.includes(id)) {\n            this.onChange();\n        }\n    }\n\n    private getOptionId(value: T): string | null {\n        for (const id of Array.from(this.optionMap.keys())) {\n            if (this.optionMap.get(id) === value) {\n                return id;\n            }\n        }\n\n        return null;\n    }\n\n}"]}