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import {
Compiler,
Component,
Injectable,
Input,
ModuleWithProviders,
NgModule,
NgModuleFactory,
OnChanges, SimpleChanges, Type,
} from '@angular/core';
import {CommonModule} from '@angular/common';
//import { BrowserModule } from '@angular/platform-browser';
//let SingletonDefaultModule: NgModule;
//import cloneDeep from 'lodash/cloneDeep';
//import { CorifeusMaterialModule } from 'corifeus-web-material';
function reverse(str: string) {
return str.split('').reverse().join('') }
function random() {
return (Math.floor(Math.random() * (99999999999999999 - 10000000000000000)) + 10000000000000000).toString(16) }
let currentIdTime: number;
let currentId = 0;
function nextId(): string {
const now = Date.now(); if (currentIdTime !== now) { currentId = 0; currentIdTime = now } const comingId = ++currentId; const randomHex = reverse(random()).padStart(15, '0'); const timeHex = reverse(currentIdTime.toString(16).padStart(12, '0')) const comingIdHex = reverse(comingId.toString(16).padStart(3, '0'))
const newId: string = `p3x-angular-compile-${timeHex}${comingIdHex}${randomHex}`;
//console.log(newId) return newId }
//const cache : any = {}; @Component({ selector: '[p3x-compile]', template: `
<ng-container *ngIf="renderComponent">
<ng-container *ngComponentOutlet="dynamicComponent; ngModuleFactory: dynamicModule;"></ng-container> </ng-container>
`
})
@Injectable()
export class CompileAttribute implements OnChanges { //export class CompileAttribute implements OnChanges ,OnInit {
@Input('p3x-compile') html: string; @Input('p3x-compile-ctx')
context: any;
@Input('p3x-compile-error-handler')
errorHandler: Function = undefined;
dynamicComponent: any; dynamicModule: NgModuleFactory<any> | any;
@Input('p3x-compile-module')
module: NgModule;
@Input('p3x-compile-imports')
imports: Array<Type<any> | ModuleWithProviders<any> | any[]>;
constructor( // private container: ViewContainerRef, // private service: CompileService private compiler: Compiler, // @Inject('config') private config:CompileServiceConfig ) { } /* // not requires, since ngOnChanges does it first time change ngOnInit() { //console.log('ng init') // this.update(); } */
get renderComponent() { return typeof this.html === 'string' && this.html.trim() !== '' }
ngOnChanges(changes: SimpleChanges) { //console.log('ng one changes') this.update(); }
update() {
try {
if (this.html === undefined || this.html === null || this.html.trim() === '') {
// this.container.clear();
this.dynamicComponent = undefined; this.dynamicModule = undefined; return; } /* // looks like Angular already is caching //console.log('html', this.html) const cacheKey = this.html; //console.log(Object.keys(cache).indexOf(cacheKey), cache) if (cache.hasOwnProperty(cacheKey)) { const currentCache = cache[cacheKey]; this.dynamicComponent = currentCache.dynamicComponent this.dynamicModule = currentCache.dynamicModule return ; } */
this.dynamicComponent = this.createNewComponent(this.html, this.context); this.dynamicModule = this.compiler.compileModuleSync(this.createComponentModule(this.dynamicComponent));
/* cache[cacheKey] = { dynamicComponent: this.dynamicComponent, dynamicModule: this.dynamicModule, }; */
} catch (e) {
if (this.errorHandler === undefined) { throw e; } else { this.errorHandler(e); }
} /*
// now we use it with ngComponentOutlet, since about angular 5
await this.service.compile({ template: this.html, container: this.container, context: this.context,
imports: this.imports, module: this.module
})
*/ }
private createComponentModule(componentType: any) { let module: NgModule = {};
if (this.module !== undefined) {
module = Object.assign({}, this.module);
} /* else if (SingletonDefaultModule !== undefined && SingletonDefaultModule !== null) {
module = cloneDeep(SingletonDefaultModule); }
*/
module.imports = module.imports || [];
module.imports.push(CommonModule);
if (this.imports !== undefined) { module.imports = module.imports.concat(this.imports) } if (module.declarations === undefined) { module.declarations = [ componentType ]; } else { module.declarations.push(componentType); }
@NgModule(module) class RuntimeComponentModule { }
return RuntimeComponentModule; }
private createNewComponent(html: string, context: any) {
const selector: string = nextId()
@Component({
selector: selector,
template: html }) class DynamicComponent { context: any = context; } return DynamicComponent;
}
}