@coder/backstage-plugin-coder/dist/api/UrlSync.esm.js

Create and manage Coder workspaces from Backstage

import { createApiRef } from '@backstage/core-plugin-api';
import { CODER_API_REF_ID_PREFIX } from '../typesConstants.esm.js';
import { StateSnapshotManager } from '../utils/StateSnapshotManager.esm.js';

const CODER_PROXY_PREFIX = "/coder";
const BASE_URL_KEY_FOR_CONFIG_API = "backend.baseUrl";
const PROXY_URL_KEY_FOR_DISCOVERY_API = "proxy";
const defaultUrlPrefixes = {
  proxyPrefix: `/api/proxy`
};
const proxyRouteReplacer = /\/api\/proxy.*?$/;
class UrlSync {
  discoveryApi;
  urlCache;
  urlPrefixes;
  constructor(setup) {
    const { apis, urlPrefixes = {} } = setup;
    const { discoveryApi, configApi } = apis;
    this.discoveryApi = discoveryApi;
    this.urlPrefixes = { ...defaultUrlPrefixes, ...urlPrefixes };
    const proxyRoot = this.getProxyRootFromConfigApi(configApi);
    this.urlCache = new StateSnapshotManager({
      initialSnapshot: this.prepareNewSnapshot(proxyRoot)
    });
  }
  // ConfigApi is literally only used because it offers a synchronous way to
  // get an initial URL to use from inside the constructor. Should not be used
  // beyond initial constructor call, so it's not being embedded in the class
  getProxyRootFromConfigApi(configApi) {
    const baseUrl = configApi.getString(BASE_URL_KEY_FOR_CONFIG_API);
    return `${baseUrl}${this.urlPrefixes.proxyPrefix}`;
  }
  prepareNewSnapshot(newProxyUrl) {
    return {
      baseUrl: newProxyUrl.replace(proxyRouteReplacer, ""),
      assetsRoute: `${newProxyUrl}${CODER_PROXY_PREFIX}`,
      apiRoute: `${newProxyUrl}${CODER_PROXY_PREFIX}`
    };
  }
  /* ***************************************************************************
   * All public functions should be defined as arrow functions to ensure they
   * can be passed around React without risk of losing their `this` context
   ****************************************************************************/
  getApiEndpoint = async () => {
    const proxyRoot = await this.discoveryApi.getBaseUrl(
      PROXY_URL_KEY_FOR_DISCOVERY_API
    );
    const newSnapshot = this.prepareNewSnapshot(proxyRoot);
    this.urlCache.updateSnapshot(newSnapshot);
    return newSnapshot.apiRoute;
  };
  getAssetsEndpoint = async () => {
    const proxyRoot = await this.discoveryApi.getBaseUrl(
      PROXY_URL_KEY_FOR_DISCOVERY_API
    );
    const newSnapshot = this.prepareNewSnapshot(proxyRoot);
    this.urlCache.updateSnapshot(newSnapshot);
    return newSnapshot.assetsRoute;
  };
  getCachedUrls = () => {
    return this.urlCache.getSnapshot();
  };
  unsubscribe = (callback) => {
    this.urlCache.unsubscribe(callback);
  };
  subscribe = (callback) => {
    this.urlCache.subscribe(callback);
    return () => this.unsubscribe(callback);
  };
}
const urlSyncApiRef = createApiRef({
  id: `${CODER_API_REF_ID_PREFIX}.url-sync`
});

export { CODER_PROXY_PREFIX, UrlSync, defaultUrlPrefixes, urlSyncApiRef };
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