feat(pdf): rename acquisition-library to pdf-library and update package name to @mintel/pdf

packages/pdf-library/src/utils/cache/FileCacheAdapter.ts

@@ -0,0 +1,78 @@
+import * as fs from 'node:fs/promises';
+import * as path from 'node:path';
+import { existsSync } from 'node:fs';
+import * as crypto from 'node:crypto';
+
+export class FileCacheAdapter {
+    private cacheDir: string;
+    private prefix: string;
+    private defaultTTL: number;
+
+    constructor(config?: { cacheDir?: string; prefix?: string; defaultTTL?: number }) {
+        this.cacheDir = config?.cacheDir || path.resolve(process.cwd(), '.cache');
+        this.prefix = config?.prefix || '';
+        this.defaultTTL = config?.defaultTTL || 3600;
+
+        if (!existsSync(this.cacheDir)) {
+            fs.mkdir(this.cacheDir, { recursive: true }).catch(() => { });
+        }
+    }
+
+    private sanitize(key: string): string {
+        const clean = key.replace(/[^a-z0-9]/gi, '_');
+        if (clean.length > 64) {
+            return crypto.createHash('md5').update(key).digest('hex');
+        }
+        return clean;
+    }
+
+    private getFilePath(key: string): string {
+        const safeKey = this.sanitize(`${this.prefix}${key}`).toLowerCase();
+        return path.join(this.cacheDir, `${safeKey}.json`);
+    }
+
+    async get<T>(key: string): Promise<T | null> {
+        const filePath = this.getFilePath(key);
+        try {
+            if (!existsSync(filePath)) return null;
+            const content = await fs.readFile(filePath, 'utf8');
+            const data = JSON.parse(content);
+
+            if (data.expiry && Date.now() > data.expiry) {
+                await this.del(key);
+                return null;
+            }
+
+            return data.value;
+        } catch (_error) {
+            return null; // Keeping original return type Promise<T | null>
+        }
+    }
+
+    async set<T>(key: string, value: T, ttl?: number): Promise<void> {
+        const filePath = this.getFilePath(key);
+        const effectiveTTL = ttl !== undefined ? ttl : this.defaultTTL;
+        const data = {
+            value,
+            expiry: effectiveTTL > 0 ? Date.now() + effectiveTTL * 1000 : null,
+            updatedAt: new Date().toISOString()
+        };
+
+        try {
+            await fs.writeFile(filePath, JSON.stringify(data, null, 2), 'utf8');
+        } catch (_error) {
+            // Ignore
+        }
+    }
+
+    async del(key: string): Promise<void> {
+        const filePath = this.getFilePath(key);
+        try {
+            if (existsSync(filePath)) {
+                await fs.unlink(filePath);
+            }
+        } catch (_error) {
+            // Ignored - best effort cleanup
+        }
+    }
+}