ActivityPods Solid-OIDC auth flow in AuthGate with pod provider picker and /login callback

src/shared/utils/runtimeConfig.ts

@@ -0,0 +1,38 @@
+/**
+ * Runtime configuration — values the server injects via `/festipod-config.json`.
+ *
+ * The browser bundle cannot read `process.env`, and `build.ts` only bakes in the
+ * shared-wallet material. Everything else the frontend needs at runtime lives
+ * here: backend URL, Solid-OIDC client id, and default Pod provider URL.
+ *
+ * `frontend.tsx` fetches the config endpoint and calls `setRuntimeConfig` before
+ * the app tree evaluates, so any module that imports this file reads the current
+ * values. Keeping the shape flat and env-driven lets dev/staging/prod differ
+ * without rebuilding.
+ */
+
+export interface RuntimeConfig {
+  /** URL of the Festipod backend as seen by the browser. */
+  backendUrl?: string;
+  /** Solid-OIDC `client_id`; when empty, derived as `${backendUrl}/app`. */
+  backendClientId?: string;
+  /** Default Pod provider URL; when empty, the picker asks the user. */
+  podProviderUrl?: string;
+}
+
+let runtimeConfig: RuntimeConfig = {};
+
+/** Replace the runtime config. Called once by `frontend.tsx` before `App` loads. */
+export function setRuntimeConfig(cfg: RuntimeConfig): void {
+  runtimeConfig = cfg;
+}
+
+/** The current runtime config. */
+export function getRuntimeConfig(): RuntimeConfig {
+  return runtimeConfig;
+}
+
+/** URL of the Festipod backend, when configured. */
+export function getBackendUrl(): string | undefined {
+  return runtimeConfig.backendUrl?.trim() || undefined;
+}