251123:2300 Update T1

backend/src/common/services/crypto.service.ts

@@ -0,0 +1,40 @@
+// File: src/common/services/crypto.service.ts
+// บันทึกการแก้ไข: Encryption/Decryption Utility (T1.1)
+
+import { Injectable } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import * as crypto from 'crypto';
+
+@Injectable()
+export class CryptoService {
+  private readonly algorithm = 'aes-256-cbc';
+  private readonly key: Buffer;
+  private readonly ivLength = 16;
+
+  constructor(private configService: ConfigService) {
+    // Key ต้องมีขนาด 32 bytes (256 bits)
+    const secret =
+      this.configService.get<string>('APP_SECRET_KEY') ||
+      'default-secret-key-32-chars-long!';
+    this.key = crypto.scryptSync(secret, 'salt', 32);
+  }
+
+  encrypt(text: string): string {
+    const iv = crypto.randomBytes(this.ivLength);
+    const cipher = crypto.createCipheriv(this.algorithm, this.key, iv);
+    let encrypted = cipher.update(text, 'utf8', 'hex');
+    encrypted += cipher.final('hex');
+    return `${iv.toString('hex')}:${encrypted}`;
+  }
+
+  decrypt(text: string): string {
+    const [ivHex, encryptedHex] = text.split(':');
+    if (!ivHex || !encryptedHex) return text;
+
+    const iv = Buffer.from(ivHex, 'hex');
+    const decipher = crypto.createDecipheriv(this.algorithm, this.key, iv);
+    let decrypted = decipher.update(encryptedHex, 'hex', 'utf8');
+    decrypted += decipher.final('utf8');
+    return decrypted;
+  }
+}

backend/src/common/services/request-context.service.ts

@@ -0,0 +1,35 @@
+// File: src/common/services/request-context.service.ts
+// บันทึกการแก้ไข: เก็บ Context ระหว่าง Request (User, TraceID) (T1.1)
+
+import { Injectable, Scope } from '@nestjs/common';
+import { AsyncLocalStorage } from 'async_hooks';
+
+@Injectable({ scope: Scope.DEFAULT })
+export class RequestContextService {
+  private static readonly cls = new AsyncLocalStorage<Map<string, any>>();
+
+  static run(fn: () => void) {
+    this.cls.run(new Map(), fn);
+  }
+
+  static set(key: string, value: any) {
+    const store = this.cls.getStore();
+    if (store) {
+      store.set(key, value);
+    }
+  }
+
+  static get<T>(key: string): T | undefined {
+    const store = this.cls.getStore();
+    return store?.get(key);
+  }
+
+  // Helper methods
+  static get currentUserId(): number | null {
+    return this.get('user_id') || null;
+  }
+
+  static get requestId(): string | null {
+    return this.get('request_id') || null;
+  }
+}