app/services/server-config.service.ts

0001 import { Injectable } from '@angular/core';
0002 import { HttpClient } from '@angular/common/http';
0003 import * as jsoncParser from 'jsonc-parser';
0004 import {deepCopy} from "../utils/deep-copy";
0005 import {firstValueFrom} from "rxjs";
0006 import { ConfigService } from './config.service';
0007
0008
0009 export interface ServerConfig {
0010   servedByPyrobird: boolean;
0011   apiAvailable: boolean;
0012   apiBaseUrl: string;
0013   logLevel: string;
0014   configs: any[];
0015 }
0016
0017 export const defaultFirebirdConfig: ServerConfig = {
0018   apiAvailable: false,
0019   apiBaseUrl: "",
0020   servedByPyrobird: false,
0021   logLevel: 'info',
0022   configs: []
0023 };
0024
0025
0026 @Injectable({
0027   providedIn: 'root'
0028 })
0029 export class ServerConfigService {
0030   private configUrl = 'assets/config.jsonc'; // URL to the JSONC config file
0031   private _config = deepCopy(defaultFirebirdConfig);
0032   private triedLoading = false;
0033
0034   constructor(
0035     private http: HttpClient,
0036     private configService: ConfigService
0037   ) {}
0038
0039   get config(): ServerConfig {
0040     if (!this.triedLoading) {
0041       this.triedLoading = true;
0042       console.error("[ServerConfigService] config() is called while config is not loaded")
0043     }
0044     return this._config;
0045   }
0046
0047   async loadConfig(): Promise<void> {
0048     try {
0049
0050       const jsoncData = await firstValueFrom(
0051         this.http.get(this.configUrl, { responseType: 'text' })
0052       );
0053       const loadedConfig = this.parseConfig(jsoncData);
0054
0055       // Merge loadedConfig over default config
0056       this._config = { ...defaultFirebirdConfig, ...loadedConfig };
0057
0058       this.registerConfigs();
0059
0060       console.log("[ServerConfigService] Server config loaded file");
0061       console.log(`[ServerConfigService] Subsystems configs loaded: ${this._config?.configs?.length}`);
0062     } catch (error) {
0063       console.error(`Failed to load config: ${error}`);
0064       console.log(`[ServerConfigService] Default config will be used`);
0065     } finally {
0066       this.triedLoading = true;
0067     }
0068   }
0069
0070   private registerConfigs(): void {
0071     if (this._config.configs && Array.isArray(this._config.configs)) {
0072       this._config.configs.forEach(configItem => {
0073         if (configItem.key && configItem.hasOwnProperty('value')) {
0074           this.configService.createConfig(configItem.key, configItem.value);
0075         }
0076       });
0077     }
0078   }
0079
0080   private parseConfig(jsoncData: string): Partial<ServerConfig> {
0081     try {
0082       return jsoncParser.parse(jsoncData);
0083     } catch (parseError) {
0084       console.error('Error parsing JSONC data', parseError);
0085       return {};
0086     }
0087   }
0088
0089   /**
0090    * Sets the configuration - intended for use in unit tests only.
0091    * This method is safeguarded to be operational only in non-production environments.
0092    */
0093   public setUnitTestConfig(value: Partial<ServerConfig>) {
0094     this.triedLoading = true;
0095     this._config = {...defaultFirebirdConfig, ...value};
0096   }
0097 }