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MOBILE-2333 compilehtml: Eval javascript and inject providers

main
Dani Palou 2018-02-13 14:44:08 +01:00
parent 91c8be2167
commit ec4b76b439
1 changed files with 110 additions and 6 deletions
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116
src/components/compile-html/compile-html.ts
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@ -12,9 +12,17 @@
// See the License for the specific language governing permissions and
// limitations under the License.
import { Component, NgModule, Input, OnInit, OnDestroy, ViewContainerRef, Compiler, ViewChild, ComponentRef } from '@angular/core';
import { IonicModule } from 'ionic-angular';
import { TranslateModule } from '@ngx-translate/core';
import {
Component, NgModule, Input, OnInit, OnDestroy, ViewContainerRef, Compiler, ViewChild, ComponentRef, Injector, ChangeDetectorRef
} from '@angular/core';
import {
IonicModule, NavController, Platform, ActionSheetController, AlertController, LoadingController, ModalController,
PopoverController, ToastController
} from 'ionic-angular';
import { TranslateModule, TranslateService } from '@ngx-translate/core';
import { CoreLoggerProvider } from '../../providers/logger';
// Import all modules that define components, directives and pipes.
import { CoreComponentsModule } from '../components.module';
import { CoreDirectivesModule } from '../../directives/directives.module';
import { CorePipesModule } from '../../pipes/pipes.module';
@ -23,15 +31,45 @@ import { CoreCoursesComponentsModule } from '../../core/courses/components/compo
import { CoreSiteHomeComponentsModule } from '../../core/sitehome/components/components.module';
import { CoreUserComponentsModule } from '../../core/user/components/components.module';
// Import core providers.
import { CORE_PROVIDERS } from '../../app/app.module';
import { CORE_CONTENTLINKS_PROVIDERS } from '../../core/contentlinks/contentlinks.module';
import { CORE_COURSE_PROVIDERS } from '../../core/course/course.module';
import { CORE_COURSES_PROVIDERS } from '../../core/courses/courses.module';
import { CORE_FILEUPLOADER_PROVIDERS } from '../../core/fileuploader/fileuploader.module';
import { CORE_GRADES_PROVIDERS } from '../../core/grades/grades.module';
import { CORE_LOGIN_PROVIDERS } from '../../core/login/login.module';
import { CORE_MAINMENU_PROVIDERS } from '../../core/mainmenu/mainmenu.module';
import { CORE_SHAREDFILES_PROVIDERS } from '../../core/sharedfiles/sharedfiles.module';
import { CORE_SITEADDONS_PROVIDERS } from '../../core/siteaddons/siteaddons.module';
import { CORE_SITEHOME_PROVIDERS } from '../../core/sitehome/sitehome.module';
import { CORE_USER_PROVIDERS } from '../../core/user/user.module';
import { IONIC_NATIVE_PROVIDERS } from '../../core/emulator/emulator.module';
// Import other libraries and providers.
import { DomSanitizer } from '@angular/platform-browser';
import { FormBuilder, Validators } from '@angular/forms';
import { Http } from '@angular/http';
import { HttpClient } from '@angular/common/http';
import { CoreConfigConstants } from '../../configconstants';
import { CoreConstants } from '../../core/constants';
import * as moment from 'moment';
import { Md5 } from 'ts-md5/dist/md5';
/**
* This component has a behaviour similar to $compile for AngularJS. Given an HTML code, it will compile it so all its
* components and directives are instantiated.
*
* IMPORTANT Use this component only if it is a must. It will create and compile a new component and module everytime this
* IMPORTANT: Use this component only if it is a must. It will create and compile a new component and module everytime this
* component is used, so it can slow down the app.
*
* This component isn't part of CoreComponentsModule to prevent circular dependencies. If you want to use it,
* you need to import CoreCompileHtmlComponentsModule.
*
* You can provide some Javascript code (as text) to be executed inside the component. The context of the javascript code (this)
* will be the component instance created to compile the template. This means your javascript code can interact with the template.
* The component instance will have most of the providers so you can use them in the javascript code. E.g. if you want to use
* CoreAppProvider, you can do it with "this.CoreAppProvider".
*/
@Component({
selector: 'core-compile-html',
@ -44,14 +82,25 @@ export class CoreCompileHtmlComponent implements OnInit, OnDestroy {
CoreCourseComponentsModule, CoreCoursesComponentsModule, CoreSiteHomeComponentsModule, CoreUserComponentsModule
];
// Other Ionic/Angular providers that don't depend on where they are injected.
protected OTHER_PROVIDERS = [
TranslateService, Http, HttpClient, Platform, DomSanitizer, ActionSheetController, AlertController, LoadingController,
ModalController, PopoverController, ToastController, FormBuilder
];
@Input() text: string; // The HTML text to display.
@Input() javascript: string; // The javascript to execute in the component.
// Get the container where to put the content.
@ViewChild('dynamicComponent', { read: ViewContainerRef }) container: ViewContainerRef;
protected componentRef: ComponentRef<any>;
protected logger;
constructor(protected compiler: Compiler) { }
constructor(logger: CoreLoggerProvider, protected compiler: Compiler, protected injector: Injector,
protected cdr: ChangeDetectorRef, protected navCtrl: NavController) {
this.logger = logger.getInstance('CoreCompileHtmlComponent');
}
/**
* Component being initialized.
@ -59,7 +108,7 @@ export class CoreCompileHtmlComponent implements OnInit, OnDestroy {
ngOnInit(): void {
if (this.text) {
// Create a new component and a new module.
const component = Component({template: this.text})(class {}),
const component = this.createComponent(),
module = NgModule({imports: this.IMPORTS, declarations: [component]})(class {});
// Compile the module and the component.
@ -86,4 +135,59 @@ export class CoreCompileHtmlComponent implements OnInit, OnDestroy {
ngOnDestroy(): void {
this.componentRef && this.componentRef.destroy();
}
/**
* Create a dynamic component to compile the HTML and run the javascript.
*
* @return {any} The component class.
*/
protected createComponent(): any {
// tslint:disable: no-this-assignment
const compileInstance = this,
providers = (<any[]> CORE_PROVIDERS).concat(CORE_CONTENTLINKS_PROVIDERS).concat(CORE_COURSE_PROVIDERS)
.concat(CORE_COURSES_PROVIDERS).concat(CORE_FILEUPLOADER_PROVIDERS).concat(CORE_GRADES_PROVIDERS)
.concat(CORE_LOGIN_PROVIDERS).concat(CORE_MAINMENU_PROVIDERS).concat(CORE_SHAREDFILES_PROVIDERS)
.concat(CORE_SITEHOME_PROVIDERS).concat(CORE_SITEADDONS_PROVIDERS).concat(CORE_USER_PROVIDERS)
.concat(IONIC_NATIVE_PROVIDERS).concat(this.OTHER_PROVIDERS);
// Create the component, using the text as the template.
return Component({
template: this.text
})
(class CoreCompileHtmlFakeComponent implements OnInit {
constructor() {
// We cannot inject anything to this constructor. Use the Injector to inject all the providers into the instance.
for (const i in providers) {
const providerDef = providers[i];
if (typeof providerDef == 'function' && providerDef.name) {
try {
// Inject the provider to the instance. We use the class name as the property name.
this[providerDef.name] = compileInstance.injector.get(providerDef);
} catch (ex) {
compileInstance.logger.warn('Error injecting provider', providerDef.name, ex);
}
}
}
// Add some final components and providers.
this['ChangeDetectorRef'] = compileInstance.cdr;
this['NavController'] = compileInstance.navCtrl;
this['Validators'] = Validators;
this['CoreConfigConstants'] = CoreConfigConstants;
this['CoreConstants'] = CoreConstants;
this['moment'] = moment;
this['Md5'] = Md5;
this['componentContainer'] = compileInstance.container;
}
ngOnInit(): void {
// If there is some javascript to run, do it now.
if (compileInstance.javascript) {
// tslint:disable: no-eval
eval(compileInstance.javascript);
}
}
});
}
}