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database.ts
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87 lines (74 loc) · 2.55 KB
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import {FirebaseApp} from '../firebase-app';
import {FirebaseDatabaseError} from '../utils/error';
import {FirebaseServiceInterface, FirebaseServiceInternalsInterface} from '../firebase-service';
import {Database} from '@firebase/database';
import * as validator from '../utils/validator';
/**
* Internals of a Database instance.
*/
class DatabaseInternals implements FirebaseServiceInternalsInterface {
public databases: {
[dbUrl: string]: Database,
} = {};
/**
* Deletes the service and its associated resources.
*
* @return {Promise<()>} An empty Promise that will be fulfilled when the service is deleted.
*/
public delete(): Promise<void> {
for (const dbUrl of Object.keys(this.databases)) {
const db: Database = this.databases[dbUrl];
db.INTERNAL.delete();
}
return Promise.resolve(undefined);
}
}
export class DatabaseService implements FirebaseServiceInterface {
public INTERNAL: DatabaseInternals = new DatabaseInternals();
private appInternal: FirebaseApp;
constructor(app: FirebaseApp) {
if (!validator.isNonNullObject(app) || !('options' in app)) {
throw new FirebaseDatabaseError({
code: 'invalid-argument',
message: 'First argument passed to admin.database() must be a valid Firebase app instance.',
});
}
this.appInternal = app;
}
/**
* Returns the app associated with this DatabaseService instance.
*
* @return {FirebaseApp} The app associated with this DatabaseService instance.
*/
get app(): FirebaseApp {
return this.appInternal;
}
public getDatabase(url?: string): Database {
const dbUrl: string = this.ensureUrl(url);
if (!validator.isNonEmptyString(dbUrl)) {
throw new FirebaseDatabaseError({
code: 'invalid-argument',
message: 'Database URL must be a valid, non-empty URL string.',
});
}
let db: Database = this.INTERNAL.databases[dbUrl];
if (typeof db === 'undefined') {
const rtdb = require('@firebase/database');
const { version } = require('../../package.json');
db = rtdb.initStandalone(this.appInternal, dbUrl, version).instance;
this.INTERNAL.databases[dbUrl] = db;
}
return db;
}
private ensureUrl(url?: string): string {
if (typeof url !== 'undefined') {
return url;
} else if (typeof this.appInternal.options.databaseURL !== 'undefined') {
return this.appInternal.options.databaseURL;
}
throw new FirebaseDatabaseError({
code: 'invalid-argument',
message: 'Can\'t determine Firebase Database URL.',
});
}
}