OpenSlides/client/src/app/app.component.ts

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import { ApplicationRef, Component } from '@angular/core';
import { Router } from '@angular/router';
import { TranslateService } from '@ngx-translate/core';
import { filter, take } from 'rxjs/operators';
import { ConfigService } from './core/ui-services/config.service';
import { ConstantsService } from './core/core-services/constants.service';
import { CountUsersService } from './core/ui-services/count-users.service';
import { DataStoreUpgradeService } from './core/core-services/data-store-upgrade.service';
import { LoadFontService } from './core/ui-services/load-font.service';
import { LoginDataService } from './core/ui-services/login-data.service';
import { OperatorService } from './core/core-services/operator.service';
import { OverlayService } from './core/ui-services/overlay.service';
import { PingService } from './core/core-services/ping.service';
import { PrioritizeService } from './core/core-services/prioritize.service';
import { RoutingStateService } from './core/ui-services/routing-state.service';
import { ServertimeService } from './core/core-services/servertime.service';
import { ThemeService } from './core/ui-services/theme.service';
import { VotingBannerService } from './core/ui-services/voting-banner.service';
declare global {
/**
* Enhance array with own functions
* TODO: Remove once flatMap made its way into official JS/TS (ES 2019?)
*/
interface Array<T> {
flatMap(o: any): any[];
intersect(a: T[]): T[];
mapToObject(f: (item: T) => { [key: string]: any }): { [key: string]: any };
}
/**
* Enhances the number object to calculate real modulo operations.
* (not remainder)
*/
interface Number {
modulo(n: number): number;
}
}
/**
* Angular's global App Component
*/
@Component({
selector: 'os-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.scss']
})
export class AppComponent {
/**
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* Master-component of all apps.
*
* Inits the translation service, the operator, the login data and the constants.
*
* Handles the altering of Array.toString()
*
* @param translate To set the default language
* @param operator To call the constructor of the OperatorService
* @param loginDataService to call the constructor of the LoginDataService
* @param constantService to call the constructor of the ConstantService
* @param servertimeService executes the scheduler early on
* @param themeService used to listen to theme-changes
* @param countUsersService to call the constructor of the CountUserService
* @param configService to call the constructor of the ConfigService
* @param loadFontService to call the constructor of the LoadFontService
* @param dataStoreUpgradeService
*/
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public constructor(
translate: TranslateService,
appRef: ApplicationRef,
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servertimeService: ServertimeService,
router: Router,
operator: OperatorService,
loginDataService: LoginDataService,
constantsService: ConstantsService, // Needs to be started, so it can register itself to the WebsocketService
themeService: ThemeService,
overlayService: OverlayService,
countUsersService: CountUsersService, // Needed to register itself.
configService: ConfigService,
loadFontService: LoadFontService,
dataStoreUpgradeService: DataStoreUpgradeService, // to start it.
prioritizeService: PrioritizeService,
pingService: PingService,
routingState: RoutingStateService,
votingBannerService: VotingBannerService // needed for initialisation
) {
// manually add the supported languages
translate.addLangs(['en', 'de', 'cs', 'ru']);
// this language will be used as a fallback when a translation isn't found in the current language
translate.setDefaultLang('en');
// get the browsers default language
const browserLang = translate.getBrowserLang();
// try to use the browser language if it is available. If not, uses english.
translate.use(translate.getLangs().includes(browserLang) ? browserLang : 'en');
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// change default JS functions
this.overloadArrayFunctions();
this.overloadModulo();
// Wait until the App reaches a stable state.
// Required for the Service Worker.
appRef.isStable
.pipe(
// take only the stable state
filter(s => s),
take(1)
)
.subscribe(() => servertimeService.startScheduler());
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}
/**
* Function to alter the normal Array.toString - function
*
* Will add a whitespace after a comma and shorten the output to
* three strings.
*
* TODO: Should be renamed
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*/
private overloadArrayFunctions(): void {
Object.defineProperty(Array.prototype, 'toString', {
value: function(): string {
let string = '';
const iterations = Math.min(this.length, 3);
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for (let i = 0; i <= iterations; i++) {
if (i < iterations) {
string += this[i];
}
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if (i < iterations - 1) {
string += ', ';
} else if (i === iterations && this.length > iterations) {
string += ', ...';
}
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}
return string;
},
enumerable: false
});
Object.defineProperty(Array.prototype, 'flatMap', {
value: function(o: any): any[] {
const concatFunction = (x: any, y: any[]) => x.concat(y);
const flatMapLogic = (f: any, xs: any) => xs.map(f).reduce(concatFunction, []);
return flatMapLogic(o, this);
},
enumerable: false
});
// intersect
Object.defineProperty(Array.prototype, 'intersect', {
value: function<T>(other: T[]): T[] {
let a = this;
let b = other;
// indexOf to loop over shorter
if (b.length > a.length) {
[a, b] = [b, a];
}
return a.filter(e => b.indexOf(e) > -1);
},
enumerable: false
});
// mapToObject
Object.defineProperty(Array.prototype, 'mapToObject', {
value: function<T>(f: (item: T) => { [key: string]: any }): { [key: string]: any } {
return this.reduce((aggr, item) => {
const res = f(item);
for (const key in res) {
if (res.hasOwnProperty(key)) {
aggr[key] = res[key];
}
}
return aggr;
}, {});
},
enumerable: false
});
}
/**
* Enhances the number object with a real modulo operation (not remainder).
* TODO: Remove this, if the remainder operation is changed to modulo.
*/
private overloadModulo(): void {
Object.defineProperty(Number.prototype, 'modulo', {
value: function(n: number): number {
return ((this % n) + n) % n;
},
enumerable: false
});
}
}