Refactored configuration loading function.

src/index.ts

@@ -1,58 +1,36 @@
 // SPDX-License-Identifier: MIT
 
-import { readFile } from "node:fs/promises";
-import os from "node:os";
-import path from "node:path";
+import { validate as validateUuid } from "uuid";
+import { getConfig } from "@slawek/sk-tools";
 
 type Config = {
-  tenantId?: string;
-  clientId?: string;
+  tenantId: string;
+  clientId: string;
 };
 
-type ConfigCandidate = {
-  tenantId?: unknown;
-  clientId?: unknown;
-};
-
-export function getUserConfigDir(): string {
-  if (process.platform === "win32") {
-    return process.env.LOCALAPPDATA ?? path.join(os.homedir(), "AppData", "Local");
-  }
-
-  return process.env.XDG_CONFIG_HOME ?? path.join(os.homedir(), ".config");
-}
-
-async function loadConfig(configFileName: string): Promise<Config> {
-  if (typeof configFileName !== "string" || configFileName.trim() === "") {
+export async function loadConfig(configName: string): Promise<Config> {
+  if (typeof configName !== "string" || configName.trim() === "") {
     throw new Error(
-      'Invalid config file name. Expected a non-empty string like "public-config.json" or "confidential-config.json".',
+      'Invalid config name. Expected a non-empty string like "public-config" or "confidential-config".',
     );
   }
 
-  const envConfig: Config = {
+  const envConfig = {
     tenantId: process.env.AZURE_TENANT_ID,
     clientId: process.env.AZURE_CLIENT_ID,
   };
 
-  const configPath = path.join(getUserConfigDir(), "sk-az-tools", configFileName);
-  return readFile(configPath, "utf8")
-    .then((configJson) => JSON.parse(configJson) as ConfigCandidate)
-    .catch((err: unknown) => {
-      if ((err as { code?: string } | null)?.code === "ENOENT") {
-        return {} as ConfigCandidate;
-      }
-      throw err;
-    })
-    .then((json) => ({
-      tenantId: typeof json.tenantId === "string" && json.tenantId ? json.tenantId : envConfig.tenantId,
-      clientId: typeof json.clientId === "string" && json.clientId ? json.clientId : envConfig.clientId,
-    }));
-}
+  const json = (await getConfig("sk-az-tools", configName)) as Record<string, unknown>;
 
-export function loadPublicConfig(): Promise<Config> {
-  return loadConfig("public-config.json");
-}
+  const tenantId = (typeof json.tenantId === "string" && json.tenantId ? json.tenantId : envConfig.tenantId) ?? "";
+  const clientId = (typeof json.clientId === "string" && json.clientId ? json.clientId : envConfig.clientId) ?? "";
 
-export function loadConfidentialConfig(): Promise<Config> {
-  return loadConfig("confidential-config.json");
+  if (!validateUuid(tenantId ?? "") || !validateUuid(clientId ?? "")) {
+    throw new Error("tenantId and clientId must be valid GUIDs.");
+  }
+
+  return {
+    tenantId,
+    clientId,
+  };
 }