Load server config on react app

geneit_app/src/api/ServerApi.ts

@@ -0,0 +1,47 @@
+import { APIClient } from "./ApiClient";
+
+interface LenConstraint {
+  min: number;
+  max: number;
+}
+
+interface Constraints {
+  mail_len: LenConstraint;
+  user_name_len: LenConstraint;
+  password_len: LenConstraint;
+}
+
+interface OIDCProvider {
+  id: string;
+  name: string;
+}
+
+export interface ServerConfig {
+  constraints: Constraints;
+  mail: string;
+  oidc_providers: OIDCProvider[];
+}
+
+let config: ServerConfig | null = null;
+
+export class ServerApi {
+  /**
+   * Get server configuration
+   */
+  static async LoadConfig(): Promise<void> {
+    config = (
+      await APIClient.exec({
+        uri: "/server/config",
+        method: "GET",
+      })
+    ).data;
+  }
+
+  /**
+   * Get cached configuration
+   */
+  static Config(): ServerConfig {
+    if (config === null) throw new Error("Missing configuration!");
+    return config;
+  }
+}