source: trip-planner-front/node_modules/@angular/compiler/esm2015/src/directive_resolver.js@ e29cc2e

/**
 * @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.io/license
 */
import { createComponent, createContentChild, createContentChildren, createDirective, createHostBinding, createHostListener, createInput, createOutput, createViewChild, createViewChildren } from './core';
import { resolveForwardRef, splitAtColon, stringify } from './util';
const QUERY_METADATA_IDENTIFIERS = [
    createViewChild,
    createViewChildren,
    createContentChild,
    createContentChildren,
];
/*
 * Resolve a `Type` for {@link Directive}.
 *
 * This interface can be overridden by the application developer to create custom behavior.
 *
 * See {@link Compiler}
 */
export class DirectiveResolver {
    constructor(_reflector) {
        this._reflector = _reflector;
    }
    isDirective(type) {
        const typeMetadata = this._reflector.annotations(resolveForwardRef(type));
        return typeMetadata && typeMetadata.some(isDirectiveMetadata);
    }
    resolve(type, throwIfNotFound = true) {
        const typeMetadata = this._reflector.annotations(resolveForwardRef(type));
        if (typeMetadata) {
            const metadata = findLast(typeMetadata, isDirectiveMetadata);
            if (metadata) {
                const propertyMetadata = this._reflector.propMetadata(type);
                const guards = this._reflector.guards(type);
                return this._mergeWithPropertyMetadata(metadata, propertyMetadata, guards, type);
            }
        }
        if (throwIfNotFound) {
            throw new Error(`No Directive annotation found on ${stringify(type)}`);
        }
        return null;
    }
    _mergeWithPropertyMetadata(dm, propertyMetadata, guards, directiveType) {
        const inputs = [];
        const outputs = [];
        const host = {};
        const queries = {};
        Object.keys(propertyMetadata).forEach((propName) => {
            const input = findLast(propertyMetadata[propName], (a) => createInput.isTypeOf(a));
            if (input) {
                if (input.bindingPropertyName) {
                    inputs.push(`${propName}: ${input.bindingPropertyName}`);
                }
                else {
                    inputs.push(propName);
                }
            }
            const output = findLast(propertyMetadata[propName], (a) => createOutput.isTypeOf(a));
            if (output) {
                if (output.bindingPropertyName) {
                    outputs.push(`${propName}: ${output.bindingPropertyName}`);
                }
                else {
                    outputs.push(propName);
                }
            }
            const hostBindings = propertyMetadata[propName].filter(a => createHostBinding.isTypeOf(a));
            hostBindings.forEach(hostBinding => {
                if (hostBinding.hostPropertyName) {
                    const startWith = hostBinding.hostPropertyName[0];
                    if (startWith === '(') {
                        throw new Error(`@HostBinding can not bind to events. Use @HostListener instead.`);
                    }
                    else if (startWith === '[') {
                        throw new Error(`@HostBinding parameter should be a property name, 'class.<name>', or 'attr.<name>'.`);
                    }
                    host[`[${hostBinding.hostPropertyName}]`] = propName;
                }
                else {
                    host[`[${propName}]`] = propName;
                }
            });
            const hostListeners = propertyMetadata[propName].filter(a => createHostListener.isTypeOf(a));
            hostListeners.forEach(hostListener => {
                const args = hostListener.args || [];
                host[`(${hostListener.eventName})`] = `${propName}(${args.join(',')})`;
            });
            const query = findLast(propertyMetadata[propName], (a) => QUERY_METADATA_IDENTIFIERS.some(i => i.isTypeOf(a)));
            if (query) {
                queries[propName] = query;
            }
        });
        return this._merge(dm, inputs, outputs, host, queries, guards, directiveType);
    }
    _extractPublicName(def) {
        return splitAtColon(def, [null, def])[1].trim();
    }
    _dedupeBindings(bindings) {
        const names = new Set();
        const publicNames = new Set();
        const reversedResult = [];
        // go last to first to allow later entries to overwrite previous entries
        for (let i = bindings.length - 1; i >= 0; i--) {
            const binding = bindings[i];
            const name = this._extractPublicName(binding);
            publicNames.add(name);
            if (!names.has(name)) {
                names.add(name);
                reversedResult.push(binding);
            }
        }
        return reversedResult.reverse();
    }
    _merge(directive, inputs, outputs, host, queries, guards, directiveType) {
        const mergedInputs = this._dedupeBindings(directive.inputs ? directive.inputs.concat(inputs) : inputs);
        const mergedOutputs = this._dedupeBindings(directive.outputs ? directive.outputs.concat(outputs) : outputs);
        const mergedHost = directive.host ? Object.assign(Object.assign({}, directive.host), host) : host;
        const mergedQueries = directive.queries ? Object.assign(Object.assign({}, directive.queries), queries) : queries;
        if (createComponent.isTypeOf(directive)) {
            const comp = directive;
            return createComponent({
                selector: comp.selector,
                inputs: mergedInputs,
                outputs: mergedOutputs,
                host: mergedHost,
                exportAs: comp.exportAs,
                moduleId: comp.moduleId,
                queries: mergedQueries,
                changeDetection: comp.changeDetection,
                providers: comp.providers,
                viewProviders: comp.viewProviders,
                entryComponents: comp.entryComponents,
                template: comp.template,
                templateUrl: comp.templateUrl,
                styles: comp.styles,
                styleUrls: comp.styleUrls,
                encapsulation: comp.encapsulation,
                animations: comp.animations,
                interpolation: comp.interpolation,
                preserveWhitespaces: directive.preserveWhitespaces,
            });
        }
        else {
            return createDirective({
                selector: directive.selector,
                inputs: mergedInputs,
                outputs: mergedOutputs,
                host: mergedHost,
                exportAs: directive.exportAs,
                queries: mergedQueries,
                providers: directive.providers,
                guards
            });
        }
    }
}
function isDirectiveMetadata(type) {
    return createDirective.isTypeOf(type) || createComponent.isTypeOf(type);
}
export function findLast(arr, condition) {
    for (let i = arr.length - 1; i >= 0; i--) {
        if (condition(arr[i])) {
            return arr[i];
        }
    }
    return null;
}
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* @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.io/license\n */\n\nimport {CompileReflector} from './compile_reflector';\nimport {Component, createComponent, createContentChild, createContentChildren, createDirective, createHostBinding, createHostListener, createInput, createOutput, createViewChild, createViewChildren, Directive, Type} from './core';\nimport {resolveForwardRef, splitAtColon, stringify} from './util';\n\nconst QUERY_METADATA_IDENTIFIERS = [\n  createViewChild,\n  createViewChildren,\n  createContentChild,\n  createContentChildren,\n];\n\n/*\n * Resolve a `Type` for {@link Directive}.\n *\n * This interface can be overridden by the application developer to create custom behavior.\n *\n * See {@link Compiler}\n */\nexport class DirectiveResolver {\n  constructor(private _reflector: CompileReflector) {}\n\n  isDirective(type: Type) {\n    const typeMetadata = this._reflector.annotations(resolveForwardRef(type));\n    return typeMetadata && typeMetadata.some(isDirectiveMetadata);\n  }\n\n  /**\n   * Return {@link Directive} for a given `Type`.\n   */\n  resolve(type: Type): Directive;\n  resolve(type: Type, throwIfNotFound: true): Directive;\n  resolve(type: Type, throwIfNotFound: boolean): Directive|null;\n  resolve(type: Type, throwIfNotFound = true): Directive|null {\n    const typeMetadata = this._reflector.annotations(resolveForwardRef(type));\n    if (typeMetadata) {\n      const metadata = findLast(typeMetadata, isDirectiveMetadata);\n      if (metadata) {\n        const propertyMetadata = this._reflector.propMetadata(type);\n        const guards = this._reflector.guards(type);\n        return this._mergeWithPropertyMetadata(metadata, propertyMetadata, guards, type);\n      }\n    }\n\n    if (throwIfNotFound) {\n      throw new Error(`No Directive annotation found on ${stringify(type)}`);\n    }\n\n    return null;\n  }\n\n  private _mergeWithPropertyMetadata(\n      dm: Directive, propertyMetadata: {[key: string]: any[]}, guards: {[key: string]: any},\n      directiveType: Type): Directive {\n    const inputs: string[] = [];\n    const outputs: string[] = [];\n    const host: {[key: string]: string} = {};\n    const queries: {[key: string]: any} = {};\n    Object.keys(propertyMetadata).forEach((propName: string) => {\n      const input = findLast(propertyMetadata[propName], (a) => createInput.isTypeOf(a));\n      if (input) {\n        if (input.bindingPropertyName) {\n          inputs.push(`${propName}: ${input.bindingPropertyName}`);\n        } else {\n          inputs.push(propName);\n        }\n      }\n      const output = findLast(propertyMetadata[propName], (a) => createOutput.isTypeOf(a));\n      if (output) {\n        if (output.bindingPropertyName) {\n          outputs.push(`${propName}: ${output.bindingPropertyName}`);\n        } else {\n          outputs.push(propName);\n        }\n      }\n      const hostBindings = propertyMetadata[propName].filter(a => createHostBinding.isTypeOf(a));\n      hostBindings.forEach(hostBinding => {\n        if (hostBinding.hostPropertyName) {\n          const startWith = hostBinding.hostPropertyName[0];\n          if (startWith === '(') {\n            throw new Error(`@HostBinding can not bind to events. Use @HostListener instead.`);\n          } else if (startWith === '[') {\n            throw new Error(\n                `@HostBinding parameter should be a property name, 'class.<name>', or 'attr.<name>'.`);\n          }\n          host[`[${hostBinding.hostPropertyName}]`] = propName;\n        } else {\n          host[`[${propName}]`] = propName;\n        }\n      });\n      const hostListeners = propertyMetadata[propName].filter(a => createHostListener.isTypeOf(a));\n      hostListeners.forEach(hostListener => {\n        const args = hostListener.args || [];\n        host[`(${hostListener.eventName})`] = `${propName}(${args.join(',')})`;\n      });\n      const query = findLast(\n          propertyMetadata[propName], (a) => QUERY_METADATA_IDENTIFIERS.some(i => i.isTypeOf(a)));\n      if (query) {\n        queries[propName] = query;\n      }\n    });\n    return this._merge(dm, inputs, outputs, host, queries, guards, directiveType);\n  }\n\n  private _extractPublicName(def: string) {\n    return splitAtColon(def, [null!, def])[1].trim();\n  }\n\n  private _dedupeBindings(bindings: string[]): string[] {\n    const names = new Set<string>();\n    const publicNames = new Set<string>();\n    const reversedResult: string[] = [];\n    // go last to first to allow later entries to overwrite previous entries\n    for (let i = bindings.length - 1; i >= 0; i--) {\n      const binding = bindings[i];\n      const name = this._extractPublicName(binding);\n      publicNames.add(name);\n      if (!names.has(name)) {\n        names.add(name);\n        reversedResult.push(binding);\n      }\n    }\n    return reversedResult.reverse();\n  }\n\n  private _merge(\n      directive: Directive, inputs: string[], outputs: string[], host: {[key: string]: string},\n      queries: {[key: string]: any}, guards: {[key: string]: any}, directiveType: Type): Directive {\n    const mergedInputs =\n        this._dedupeBindings(directive.inputs ? directive.inputs.concat(inputs) : inputs);\n    const mergedOutputs =\n        this._dedupeBindings(directive.outputs ? directive.outputs.concat(outputs) : outputs);\n    const mergedHost = directive.host ? {...directive.host, ...host} : host;\n    const mergedQueries = directive.queries ? {...directive.queries, ...queries} : queries;\n    if (createComponent.isTypeOf(directive)) {\n      const comp = directive as Component;\n      return createComponent({\n        selector: comp.selector,\n        inputs: mergedInputs,\n        outputs: mergedOutputs,\n        host: mergedHost,\n        exportAs: comp.exportAs,\n        moduleId: comp.moduleId,\n        queries: mergedQueries,\n        changeDetection: comp.changeDetection,\n        providers: comp.providers,\n        viewProviders: comp.viewProviders,\n        entryComponents: comp.entryComponents,\n        template: comp.template,\n        templateUrl: comp.templateUrl,\n        styles: comp.styles,\n        styleUrls: comp.styleUrls,\n        encapsulation: comp.encapsulation,\n        animations: comp.animations,\n        interpolation: comp.interpolation,\n        preserveWhitespaces: directive.preserveWhitespaces,\n      });\n    } else {\n      return createDirective({\n        selector: directive.selector,\n        inputs: mergedInputs,\n        outputs: mergedOutputs,\n        host: mergedHost,\n        exportAs: directive.exportAs,\n        queries: mergedQueries,\n        providers: directive.providers,\n        guards\n      });\n    }\n  }\n}\n\nfunction isDirectiveMetadata(type: any): type is Directive {\n  return createDirective.isTypeOf(type) || createComponent.isTypeOf(type);\n}\n\nexport function findLast<T>(arr: T[], condition: (value: T) => boolean): T|null {\n  for (let i = arr.length - 1; i >= 0; i--) {\n    if (condition(arr[i])) {\n      return arr[i];\n    }\n  }\n  return null;\n}\n"]}