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server/src/config/variables.ts

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+import fs from 'fs';
+import path from 'path';
+
+export interface ServerVariablesConfig {
+  klipyApiKey: string;
+}
+
+const DATA_DIR = path.join(process.cwd(), 'data');
+const VARIABLES_FILE = path.join(DATA_DIR, 'variables.json');
+
+function normalizeKlipyApiKey(value: unknown): string {
+  return typeof value === 'string' ? value.trim() : '';
+}
+
+function readRawVariables(): { rawContents: string; parsed: Record<string, unknown> } {
+  if (!fs.existsSync(VARIABLES_FILE)) {
+    return { rawContents: '', parsed: {} };
+  }
+
+  const rawContents = fs.readFileSync(VARIABLES_FILE, 'utf8');
+
+  if (!rawContents.trim()) {
+    return { rawContents, parsed: {} };
+  }
+
+  try {
+    const parsed = JSON.parse(rawContents) as unknown;
+
+    if (parsed && typeof parsed === 'object' && !Array.isArray(parsed)) {
+      return { rawContents, parsed: parsed as Record<string, unknown> };
+    }
+  } catch (error) {
+    console.warn('[Config] Failed to parse variables.json. Recreating it with defaults.', error);
+  }
+
+  return { rawContents, parsed: {} };
+}
+
+export function getVariablesConfigPath(): string {
+  return VARIABLES_FILE;
+}
+
+export function ensureVariablesConfig(): ServerVariablesConfig {
+  if (!fs.existsSync(DATA_DIR)) {
+    fs.mkdirSync(DATA_DIR, { recursive: true });
+  }
+
+  const { rawContents, parsed } = readRawVariables();
+  const normalized = {
+    ...parsed,
+    klipyApiKey: normalizeKlipyApiKey(parsed.klipyApiKey)
+  };
+  const nextContents = JSON.stringify(normalized, null, 2) + '\n';
+
+  if (!fs.existsSync(VARIABLES_FILE) || rawContents !== nextContents) {
+    fs.writeFileSync(VARIABLES_FILE, nextContents, 'utf8');
+  }
+
+  return { klipyApiKey: normalized.klipyApiKey };
+}
+
+export function getVariablesConfig(): ServerVariablesConfig {
+  return ensureVariablesConfig();
+}
+
+export function getKlipyApiKey(): string {
+  return getVariablesConfig().klipyApiKey;
+}
+
+export function hasKlipyApiKey(): boolean {
+  return getKlipyApiKey().length > 0;
+}