251128:1700 Backend to T3.1.1

2025-11-28 17:12:05 +07:00
parent 43f6bd1f40
commit 6cafa6a2b9
51 changed files with 4891 additions and 2849 deletions
--- a/backend/src/common/services/crypto.service.ts
+++ b/backend/src/common/services/crypto.service.ts
@@ -1,12 +1,13 @@
 // File: src/common/services/crypto.service.ts
 // บันทึกการแก้ไข: Encryption/Decryption Utility (T1.1)

-import { Injectable } from '@nestjs/common';
+import { Injectable, Logger } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
 import * as crypto from 'crypto';

@Injectable()
 export class CryptoService {
+  private readonly logger = new Logger(CryptoService.name);
  private readonly algorithm = 'aes-256-cbc';
  private readonly key: Buffer;
  private readonly ivLength = 16;
@@ -19,22 +20,42 @@ export class CryptoService {
    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}`;
+  encrypt(text: string | number | boolean): string {
+    if (text === null || text === undefined) return text as any;
+
+    try {
+      const stringValue = String(text);
+      const iv = crypto.randomBytes(this.ivLength);
+      const cipher = crypto.createCipheriv(this.algorithm, this.key, iv);
+      let encrypted = cipher.update(stringValue, 'utf8', 'hex');
+      encrypted += cipher.final('hex');
+      return `${iv.toString('hex')}:${encrypted}`;
+    } catch (error: any) {
+      // Fix TS18046: Cast error to any or Error to access .message
+      this.logger.error(`Encryption failed: ${error.message}`);
+      throw error;
+    }
  }

  decrypt(text: string): string {
-    const [ivHex, encryptedHex] = text.split(':');
-    if (!ivHex || !encryptedHex) return text;
+    if (!text || typeof text !== 'string' || !text.includes(':')) 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;
+    try {
+      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;
+    } catch (error: any) {
+      // Fix TS18046: Cast error to any or Error to access .message
+      this.logger.warn(
+        `Decryption failed for value. Returning original text. Error: ${error.message}`,
+      );
+      // กรณี Decrypt ไม่ได้ ให้คืนค่าเดิมเพื่อป้องกัน App Crash
+      return text;
+    }
  }
 }
--- a/backend/src/modules/correspondence/dto/create-routing-template.dto.ts
+++ b/backend/src/modules/correspondence/dto/create-routing-template.dto.ts
@@ -0,0 +1,57 @@
+// File: src/modules/correspondence/dto/create-routing-template.dto.ts
+import {
+  IsString,
+  IsNotEmpty,
+  IsOptional,
+  IsInt,
+  IsArray,
+  ValidateNested,
+  IsEnum,
+  IsBoolean,
+} from 'class-validator';
+import { Type } from 'class-transformer';
+
+export class CreateRoutingTemplateStepDto {
+  @IsInt()
+  @IsNotEmpty()
+  sequence!: number;
+
+  @IsInt()
+  @IsNotEmpty()
+  toOrganizationId!: number;
+
+  @IsInt()
+  @IsOptional()
+  roleId?: number;
+
+  @IsString()
+  @IsOptional()
+  stepPurpose?: string = 'FOR_REVIEW';
+
+  @IsInt()
+  @IsOptional()
+  expectedDays?: number;
+}
+
+export class CreateRoutingTemplateDto {
+  @IsString()
+  @IsNotEmpty()
+  templateName!: string;
+
+  @IsString()
+  @IsOptional()
+  description?: string;
+
+  @IsInt()
+  @IsOptional()
+  projectId?: number;
+
+  @IsBoolean()
+  @IsOptional()
+  isActive?: boolean;
+
+  @IsArray()
+  @ValidateNested({ each: true })
+  @Type(() => CreateRoutingTemplateStepDto)
+  steps!: CreateRoutingTemplateStepDto[];
+}
--- a/backend/src/modules/correspondence/entities/correspondence-revision.entity.ts
+++ b/backend/src/modules/correspondence/entities/correspondence-revision.entity.ts
@@ -1,3 +1,4 @@
+// File: src/modules/correspondence/entities/correspondence-revision.entity.ts
 import {
  Entity,
  Column,
@@ -5,12 +6,16 @@ import {
  ManyToOne,
  JoinColumn,
  CreateDateColumn,
+  Index,
 } from 'typeorm';
 import { Correspondence } from './correspondence.entity.js';
 import { CorrespondenceStatus } from './correspondence-status.entity.js';
 import { User } from '../../user/entities/user.entity.js';

@Entity('correspondence_revisions')
+// ✅ เพิ่ม Index สำหรับ Virtual Columns เพื่อให้ Search เร็วขึ้น
+@Index('idx_corr_rev_v_project', ['vRefProjectId'])
+@Index('idx_corr_rev_v_type', ['vRefType'])
 export class CorrespondenceRevision {
  @PrimaryGeneratedColumn()
  id!: number;
@@ -39,6 +44,27 @@ export class CorrespondenceRevision {
  @Column({ type: 'json', nullable: true })
  details?: any; // เก็บข้อมูลแบบ Dynamic ตาม Type

+  // ✅ [New] Virtual Column: ดึง Project ID จาก JSON details
+  @Column({
+    name: 'v_ref_project_id',
+    type: 'int',
+    generatedType: 'VIRTUAL',
+    asExpression: "JSON_UNQUOTE(JSON_EXTRACT(details, '$.projectId'))",
+    nullable: true,
+  })
+  vRefProjectId?: number;
+
+  // ✅ [New] Virtual Column: ดึง Document SubType จาก JSON details
+  @Column({
+    name: 'v_doc_subtype',
+    type: 'varchar',
+    length: 50,
+    generatedType: 'VIRTUAL',
+    asExpression: "JSON_UNQUOTE(JSON_EXTRACT(details, '$.subType'))",
+    nullable: true,
+  })
+  vRefType?: string;
+
  // Dates
  @Column({ name: 'document_date', type: 'date', nullable: true })
  documentDate?: Date;
--- a/backend/src/modules/correspondence/entities/correspondence-routing.entity.ts
+++ b/backend/src/modules/correspondence/entities/correspondence-routing.entity.ts
@@ -1,3 +1,4 @@
+// File: src/modules/correspondence/entities/correspondence-routing.entity.ts
 import {
  Entity,
  Column,
@@ -9,7 +10,7 @@ import {
 import { CorrespondenceRevision } from './correspondence-revision.entity.js';
 import { Organization } from '../../project/entities/organization.entity.js';
 import { User } from '../../user/entities/user.entity.js';
-import { RoutingTemplate } from './routing-template.entity.js'; // <--- ✅ เพิ่ม Import นี้ครับ
+import { RoutingTemplate } from './routing-template.entity.js';

@Entity('correspondence_routings')
 export class CorrespondenceRouting {
@@ -49,6 +50,10 @@ export class CorrespondenceRouting {
  @Column({ name: 'processed_at', type: 'datetime', nullable: true })
  processedAt?: Date;

+  // ✅ [New] เพิ่ม State Context เพื่อเก็บ Snapshot ข้อมูล Workflow ณ จุดนั้น
+  @Column({ name: 'state_context', type: 'json', nullable: true })
+  stateContext?: any;
+
  @CreateDateColumn({ name: 'created_at' })
  createdAt!: Date;

@@ -57,7 +62,7 @@ export class CorrespondenceRouting {
  @JoinColumn({ name: 'correspondence_id' })
  correspondenceRevision?: CorrespondenceRevision;

-  @ManyToOne(() => RoutingTemplate) // ตอนนี้ TypeScript จะรู้จัก RoutingTemplate แล้ว
+  @ManyToOne(() => RoutingTemplate)
  @JoinColumn({ name: 'template_id' })
  template?: RoutingTemplate;

--- a/backend/src/modules/correspondence/entities/routing-template-step.entity.ts
+++ b/backend/src/modules/correspondence/entities/routing-template-step.entity.ts
@@ -1,12 +1,14 @@
+// File: src/modules/correspondence/entities/routing-template-step.entity.ts
 import {
  Entity,
-  Column,
  PrimaryGeneratedColumn,
+  Column,
  ManyToOne,
  JoinColumn,
 } from 'typeorm';
 import { RoutingTemplate } from './routing-template.entity.js';
 import { Organization } from '../../project/entities/organization.entity.js';
+import { Role } from '../../user/entities/role.entity.js';

@Entity('correspondence_routing_template_steps')
 export class RoutingTemplateStep {
@@ -22,17 +24,27 @@ export class RoutingTemplateStep {
  @Column({ name: 'to_organization_id' })
  toOrganizationId!: number;

+  @Column({ name: 'role_id', nullable: true })
+  roleId?: number;
+
  @Column({ name: 'step_purpose', default: 'FOR_REVIEW' })
-  stepPurpose!: string; // FOR_APPROVAL, FOR_REVIEW
+  stepPurpose!: string;

  @Column({ name: 'expected_days', nullable: true })
  expectedDays?: number;

-  @ManyToOne(() => RoutingTemplate, (t) => t.steps, { onDelete: 'CASCADE' })
+  // Relations
+  @ManyToOne(() => RoutingTemplate, (template) => template.steps, {
+    onDelete: 'CASCADE',
+  })
  @JoinColumn({ name: 'template_id' })
  template?: RoutingTemplate;

  @ManyToOne(() => Organization)
  @JoinColumn({ name: 'to_organization_id' })
  toOrganization?: Organization;
+
+  @ManyToOne(() => Role)
+  @JoinColumn({ name: 'role_id' })
+  role?: Role;
 }
--- a/backend/src/modules/json-schema/dto/create-json-schema.dto.ts
+++ b/backend/src/modules/json-schema/dto/create-json-schema.dto.ts
@@ -1,3 +1,4 @@
+// File: src/modules/json-schema/dto/create-json-schema.dto.ts
 import {
  IsString,
  IsNotEmpty,
@@ -5,22 +6,65 @@ import {
  IsOptional,
  IsBoolean,
  IsObject,
+  IsArray,
+  ValidateNested,
 } from 'class-validator';
+import { Type } from 'class-transformer';
+
+export class VirtualColumnConfigDto {
+  @IsString()
+  @IsNotEmpty()
+  json_path!: string;
+
+  @IsString()
+  @IsNotEmpty()
+  column_name!: string;
+
+  @IsString()
+  @IsNotEmpty()
+  data_type!: 'INT' | 'VARCHAR' | 'BOOLEAN' | 'DATE' | 'DECIMAL' | 'DATETIME';
+
+  @IsString()
+  @IsOptional()
+  index_type?: 'INDEX' | 'UNIQUE' | 'FULLTEXT';
+
+  @IsBoolean()
+  @IsOptional()
+  is_required?: boolean;
+}

 export class CreateJsonSchemaDto {
  @IsString()
  @IsNotEmpty()
-  schemaCode!: string; // รหัส Schema (ต้องไม่ซ้ำ เช่น 'RFA_DWG_V1')
+  schemaCode!: string;
+
+  @IsString() // ✅ เพิ่ม Validation
+  @IsNotEmpty()
+  tableName!: string;

  @IsInt()
  @IsOptional()
-  version?: number; // เวอร์ชัน (Default: 1)
+  version?: number;

  @IsObject()
  @IsNotEmpty()
-  schemaDefinition!: Record<string, any>; // โครงสร้าง JSON Schema (Standard Format)
+  schemaDefinition!: Record<string, any>;
+
+  @IsObject()
+  @IsOptional()
+  uiSchema?: Record<string, any>;
+
+  @IsArray()
+  @IsOptional()
+  @ValidateNested({ each: true })
+  @Type(() => VirtualColumnConfigDto)
+  virtualColumns?: VirtualColumnConfigDto[];
+
+  @IsObject()
+  @IsOptional()
+  migrationScript?: Record<string, any>;

  @IsBoolean()
  @IsOptional()
-  isActive?: boolean; // สถานะการใช้งาน
+  isActive?: boolean;
 }
--- a/backend/src/modules/json-schema/dto/migrate-data.dto.ts
+++ b/backend/src/modules/json-schema/dto/migrate-data.dto.ts
@@ -0,0 +1,19 @@
+// File: src/modules/json-schema/dto/migrate-data.dto.ts
+import { IsString, IsNotEmpty, IsInt, IsOptional } from 'class-validator';
+import { ApiProperty } from '@nestjs/swagger';
+
+export class MigrateDataDto {
+  @ApiProperty({ description: 'The schema code to migrate to (e.g., RFA_DWG)' })
+  @IsString()
+  @IsNotEmpty()
+  targetSchemaCode!: string;
+
+  @ApiProperty({
+    description: 'Target version. If omitted, migrates to latest.',
+    required: false,
+  })
+  @IsInt()
+  @IsOptional()
+  targetVersion?: number;
+}
+
--- a/backend/src/modules/json-schema/entities/json-schema.entity.ts
+++ b/backend/src/modules/json-schema/entities/json-schema.entity.ts
@@ -1,24 +1,47 @@
+// File: src/modules/json-schema/entities/json-schema.entity.ts
 import {
  Entity,
  Column,
  PrimaryGeneratedColumn,
  CreateDateColumn,
  UpdateDateColumn,
+  Index,
 } from 'typeorm';

+export interface VirtualColumnConfig {
+  json_path: string;
+  column_name: string;
+  data_type: 'INT' | 'VARCHAR' | 'BOOLEAN' | 'DATE' | 'DECIMAL' | 'DATETIME';
+  index_type?: 'INDEX' | 'UNIQUE' | 'FULLTEXT';
+  is_required: boolean;
+}
+
@Entity('json_schemas')
+@Index(['schemaCode', 'version'], { unique: true })
 export class JsonSchema {
  @PrimaryGeneratedColumn()
  id!: number;

-  @Column({ name: 'schema_code', unique: true, length: 100 })
-  schemaCode!: string; // เช่น 'RFA_DWG_V1'
+  @Column({ name: 'schema_code', length: 100 })
+  schemaCode!: string;

  @Column({ default: 1 })
  version!: number;

+  @Column({ name: 'table_name', length: 100, nullable: false }) // ✅ เพิ่ม: ระบุตารางเป้าหมาย
+  tableName!: string;
+
  @Column({ name: 'schema_definition', type: 'json' })
-  schemaDefinition!: any; // เก็บ JSON Schema มาตรฐาน (Draft 7/2019-09)
+  schemaDefinition!: any;
+
+  @Column({ name: 'ui_schema', type: 'json', nullable: true })
+  uiSchema?: any;
+
+  @Column({ name: 'virtual_columns', type: 'json', nullable: true })
+  virtualColumns?: VirtualColumnConfig[];
+
+  @Column({ name: 'migration_script', type: 'json', nullable: true })
+  migrationScript?: any;

  @Column({ name: 'is_active', default: true })
  isActive!: boolean;
--- a/backend/src/modules/json-schema/interfaces/ui-schema.interface.ts
+++ b/backend/src/modules/json-schema/interfaces/ui-schema.interface.ts
@@ -0,0 +1,84 @@
+// File: src/modules/json-schema/interfaces/ui-schema.interface.ts
+
+export type WidgetType =
+  | 'text'
+  | 'textarea'
+  | 'number'
+  | 'select'
+  | 'radio'
+  | 'checkbox'
+  | 'date'
+  | 'datetime'
+  | 'file-upload'
+  | 'document-ref'; // Custom widget สำหรับอ้างอิงเอกสารอื่น
+
+export type Operator =
+  | 'equals'
+  | 'notEquals'
+  | 'contains'
+  | 'greaterThan'
+  | 'lessThan'
+  | 'in';
+
+export interface FieldCondition {
+  field: string;
+  operator: Operator;
+  value: any;
+}
+
+export interface FieldDependency {
+  condition: FieldCondition;
+  actions: {
+    visibility?: boolean; // true = show, false = hide
+    required?: boolean;
+    disabled?: boolean;
+    filterOptions?: Record<string, any>; // เช่น กรอง Dropdown ตามค่าที่เลือก
+  };
+}
+
+export interface UiSchemaField {
+  type: 'string' | 'number' | 'boolean' | 'array' | 'object';
+  widget?: WidgetType;
+  title: string;
+  description?: string;
+  placeholder?: string;
+  enum?: any[]; // กรณีเป็น static options
+  enumNames?: string[]; // label สำหรับ options
+  dataSource?: string; // กรณีดึง options จาก API (เช่น 'master-data/disciplines')
+  defaultValue?: any;
+  readOnly?: boolean;
+  hidden?: boolean;
+
+  // Validation & Rules
+  required?: boolean;
+  dependencies?: FieldDependency[];
+
+  // For Nested Structures
+  properties?: { [key: string]: UiSchemaField };
+  items?: UiSchemaField; // For arrays
+
+  // UI Grid Layout (Tailwind classes equivalent)
+  colSpan?: number; // 1-12
+}
+
+export interface LayoutGroup {
+  id: string;
+  title: string;
+  description?: string;
+  type: 'group' | 'section';
+  fields: string[]; // Field keys ที่จะอยู่ในกลุ่มนี้
+}
+
+export interface LayoutConfig {
+  type: 'stack' | 'grid' | 'tabs' | 'steps' | 'wizard';
+  groups: LayoutGroup[];
+  options?: Record<string, any>; // Config เพิ่มเติมเฉพาะ Layout type
+}
+
+export interface UiSchema {
+  layout: LayoutConfig;
+  fields: {
+    [key: string]: UiSchemaField;
+  };
+}
+
--- a/backend/src/modules/json-schema/interfaces/validation-result.interface.ts
+++ b/backend/src/modules/json-schema/interfaces/validation-result.interface.ts
@@ -0,0 +1,34 @@
+// File: src/modules/json-schema/interfaces/validation-result.interface.ts
+
+export interface ValidationOptions {
+  /**
+   * ลบ field ที่ไม่ได้ระบุใน Schema ออกอัตโนมัติหรือไม่
+   * Default: true
+   */
+  removeAdditional?: boolean;
+
+  /**
+   * แปลงชนิดข้อมูลอัตโนมัติถ้าเป็นไปได้ (เช่น "123" -> 123)
+   * Default: true
+   */
+  coerceTypes?: boolean;
+
+  /**
+   * ใช้ค่า Default จาก Schema ถ้าข้อมูลไม่ถูกส่งมา
+   * Default: true
+   */
+  useDefaults?: boolean;
+}
+
+export interface ValidationErrorDetail {
+  field: string;
+  message: string;
+  value?: any;
+}
+
+export interface ValidationResult {
+  isValid: boolean;
+  errors: ValidationErrorDetail[];
+  sanitizedData: any;
+}
+
--- a/backend/src/modules/json-schema/json-schema.controller.ts
+++ b/backend/src/modules/json-schema/json-schema.controller.ts
@@ -1,36 +1,172 @@
-import { Controller, Post, Body, Param, UseGuards } from '@nestjs/common';
-import { ApiTags, ApiOperation, ApiBearerAuth } from '@nestjs/swagger';
+// File: src/modules/json-schema/json-schema.controller.ts
+import {
+  Body,
+  Controller,
+  Delete,
+  Get,
+  HttpCode,
+  HttpStatus,
+  Param,
+  ParseIntPipe,
+  Patch,
+  Post,
+  Query,
+  UseGuards,
+} from '@nestjs/common';
+import {
+  ApiBearerAuth,
+  ApiOperation,
+  ApiParam,
+  ApiResponse,
+  ApiTags,
+} from '@nestjs/swagger';

 import { JsonSchemaService } from './json-schema.service';
-// ✅ FIX: Import DTO
+import { SchemaMigrationService } from './services/schema-migration.service';
+
 import { CreateJsonSchemaDto } from './dto/create-json-schema.dto';
-// ✅ FIX: แก้ไข Path ของ Guards
+import { MigrateDataDto } from './dto/migrate-data.dto';
+import { SearchJsonSchemaDto } from './dto/search-json-schema.dto';
+import { UpdateJsonSchemaDto } from './dto/update-json-schema.dto';
+
+import { CurrentUser } from '../../common/decorators/current-user.decorator';
+import { RequirePermission } from '../../common/decorators/require-permission.decorator';
 import { JwtAuthGuard } from '../../common/guards/jwt-auth.guard';
 import { RbacGuard } from '../../common/guards/rbac.guard';
-import { RequirePermission } from '../../common/decorators/require-permission.decorator';
+import { User } from '../user/entities/user.entity';

-@ApiTags('JSON Schemas') // ✅ Add Swagger Tag
+@ApiTags('JSON Schemas Management')
@ApiBearerAuth()
@UseGuards(JwtAuthGuard, RbacGuard)
@Controller('json-schemas')
 export class JsonSchemaController {
-  constructor(private readonly schemaService: JsonSchemaService) {}
+  constructor(
+    private readonly jsonSchemaService: JsonSchemaService,
+    private readonly migrationService: SchemaMigrationService,
+  ) {}
+
+  // ----------------------------------------------------------------------
+  // Schema Management (CRUD)
+  // ----------------------------------------------------------------------

  @Post()
-  @ApiOperation({ summary: 'Create or Update JSON Schema' })
+  @ApiOperation({
+    summary: 'Create a new schema or new version of existing schema',
+  })
+  @ApiResponse({
+    status: 201,
+    description: 'The schema has been successfully created.',
+  })
  @RequirePermission('system.manage_all') // Admin Only
  create(@Body() createDto: CreateJsonSchemaDto) {
-    return this.schemaService.createOrUpdate(
-      createDto.schemaCode,
-      createDto.schemaDefinition,
-    );
+    return this.jsonSchemaService.create(createDto);
  }

-  @Post(':code/validate')
-  @ApiOperation({ summary: 'Test validation against a schema' })
+  @Get()
+  @ApiOperation({ summary: 'List all schemas with pagination and filtering' })
+  @RequirePermission('document.view') // Viewer+ can see schemas
+  findAll(@Query() searchDto: SearchJsonSchemaDto) {
+    return this.jsonSchemaService.findAll(searchDto);
+  }
+
+  @Get(':id')
+  @ApiOperation({ summary: 'Get a specific schema version by ID' })
+  @RequirePermission('document.view')
+  findOne(@Param('id', ParseIntPipe) id: number) {
+    return this.jsonSchemaService.findOne(id);
+  }
+
+  @Get('latest/:code')
+  @ApiOperation({
+    summary: 'Get the latest active version of a schema by code',
+  })
+  @ApiParam({ name: 'code', description: 'Schema Code (e.g., RFA_DWG)' })
+  @RequirePermission('document.view')
+  findLatest(@Param('code') code: string) {
+    return this.jsonSchemaService.findLatestByCode(code);
+  }
+
+  @Patch(':id')
+  @ApiOperation({
+    summary: 'Update a specific schema (Not recommended for active schemas)',
+  })
+  @RequirePermission('system.manage_all')
+  update(
+    @Param('id', ParseIntPipe) id: number,
+    @Body() updateDto: UpdateJsonSchemaDto,
+  ) {
+    return this.jsonSchemaService.update(id, updateDto);
+  }
+
+  @Delete(':id')
+  @ApiOperation({ summary: 'Delete a schema version (Hard Delete)' })
+  @RequirePermission('system.manage_all')
+  remove(@Param('id', ParseIntPipe) id: number) {
+    return this.jsonSchemaService.remove(id);
+  }
+
+  // ----------------------------------------------------------------------
+  // Validation & Security
+  // ----------------------------------------------------------------------
+
+  @Post('validate/:code')
+  @HttpCode(HttpStatus.OK)
+  @ApiOperation({ summary: 'Validate data against the latest schema version' })
+  @ApiResponse({
+    status: 200,
+    description: 'Validation result including errors and sanitized data',
+  })
  @RequirePermission('document.view')
  async validate(@Param('code') code: string, @Body() data: any) {
-    const isValid = await this.schemaService.validate(code, data);
-    return { valid: isValid, message: 'Validation passed' };
+    // Note: Validation API นี้ใช้สำหรับ Test หรือ Pre-check เท่านั้น
+    // การ Save จริงจะเรียกผ่าน Service ภายใน
+    return this.jsonSchemaService.validateData(code, data);
+  }
+
+  @Post('read/:code')
+  @HttpCode(HttpStatus.OK)
+  @ApiOperation({
+    summary: 'Process read data (Decrypt & Filter) based on user roles',
+  })
+  @RequirePermission('document.view')
+  async processReadData(
+    @Param('code') code: string,
+    @Body() data: any,
+    @CurrentUser() user: User,
+  ) {
+    // แปลง User Entity เป็น Security Context
+    // ใช้ as any เพื่อ bypass type checking ชั่วคราว เนื่องจาก roles มักจะถูก inject เข้ามาใน request.user
+    // โดย Strategy หรือ Guard แม้จะไม่มีใน Entity หลัก
+    const userWithRoles = user as any;
+    const userRoles = userWithRoles.roles
+      ? userWithRoles.roles.map((r: any) => r.roleName || r) // รองรับทั้ง Object Role และ String Role
+      : [];
+
+    return this.jsonSchemaService.processReadData(code, data, { userRoles });
+  }
+
+  // ----------------------------------------------------------------------
+  // Data Migration
+  // ----------------------------------------------------------------------
+
+  @Post('migrate/:table/:id')
+  @HttpCode(HttpStatus.OK)
+  @ApiOperation({
+    summary: 'Migrate specific entity data to target schema version',
+  })
+  @ApiParam({ name: 'table', description: 'Table Name (e.g. rfa_revisions)' })
+  @ApiParam({ name: 'id', description: 'Entity ID' })
+  @RequirePermission('system.manage_all') // Dangerous Op -> Admin Only
+  async migrateData(
+    @Param('table') tableName: string,
+    @Param('id', ParseIntPipe) id: number,
+    @Body() dto: MigrateDataDto,
+  ) {
+    return this.migrationService.migrateData(
+      tableName,
+      id,
+      dto.targetSchemaCode,
+      dto.targetVersion,
+    );
  }
 }
--- a/backend/src/modules/json-schema/json-schema.module.ts
+++ b/backend/src/modules/json-schema/json-schema.module.ts
@@ -1,14 +1,37 @@
+// File: src/modules/json-schema/json-schema.module.ts
 import { Module } from '@nestjs/common';
+import { ConfigModule } from '@nestjs/config';
 import { TypeOrmModule } from '@nestjs/typeorm';
-import { JsonSchemaService } from './json-schema.service';
-import { JsonSchemaController } from './json-schema.controller';
+
 import { JsonSchema } from './entities/json-schema.entity';
-import { UserModule } from '../user/user.module';
+import { JsonSchemaController } from './json-schema.controller';
+import { JsonSchemaService } from './json-schema.service';
+
+import { JsonSecurityService } from './services/json-security.service';
+import { SchemaMigrationService } from './services/schema-migration.service';
+import { UiSchemaService } from './services/ui-schema.service';
+import { VirtualColumnService } from './services/virtual-column.service';
+// Fix TS2307: Correct path to CryptoService
+import { CryptoService } from '../../common/services/crypto.service';
+
+// Import Module อื่นๆ ที่จำเป็นสำหรับ Guard (ถ้า Guards อยู่ใน Common อาจจะไม่ต้อง import ที่นี่โดยตรง)
+// import { UserModule } from '../user/user.module';

@Module({
-  imports: [TypeOrmModule.forFeature([JsonSchema]), UserModule],
+  imports: [
+    TypeOrmModule.forFeature([JsonSchema]),
+    ConfigModule,
+    // UserModule,
+  ],
  controllers: [JsonSchemaController],
-  providers: [JsonSchemaService],
-  exports: [JsonSchemaService],
+  providers: [
+    JsonSchemaService,
+    VirtualColumnService,
+    UiSchemaService,
+    SchemaMigrationService,
+    JsonSecurityService,
+    CryptoService,
+  ],
+  exports: [JsonSchemaService, SchemaMigrationService, JsonSecurityService],
 })
 export class JsonSchemaModule {}
--- a/backend/src/modules/json-schema/json-schema.service.spec.ts
+++ b/backend/src/modules/json-schema/json-schema.service.spec.ts
@@ -1,18 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing';
-import { JsonSchemaService } from './json-schema.service';
-
-describe('JsonSchemaService', () => {
-  let service: JsonSchemaService;
-
-  beforeEach(async () => {
-    const module: TestingModule = await Test.createTestingModule({
-      providers: [JsonSchemaService],
-    }).compile();
-
-    service = module.get<JsonSchemaService>(JsonSchemaService);
-  });
-
-  it('should be defined', () => {
-    expect(service).toBeDefined();
-  });
-});
--- a/backend/src/modules/json-schema/json-schema.service.ts
+++ b/backend/src/modules/json-schema/json-schema.service.ts
@@ -1,107 +1,172 @@
+// File: src/modules/json-schema/json-schema.controller.ts
 import {
-  Injectable,
-  OnModuleInit,
-  BadRequestException,
-  NotFoundException,
-  Logger,
+  Body,
+  Controller,
+  Delete,
+  Get,
+  HttpCode,
+  HttpStatus,
+  Param,
+  ParseIntPipe,
+  Patch,
+  Post,
+  Query,
+  UseGuards,
 } from '@nestjs/common';
-import { InjectRepository } from '@nestjs/typeorm';
-import { Repository } from 'typeorm';
-import Ajv from 'ajv';
-import addFormats from 'ajv-formats';
-import { JsonSchema } from './entities/json-schema.entity'; // ลบ .js
+import {
+  ApiBearerAuth,
+  ApiOperation,
+  ApiParam,
+  ApiResponse,
+  ApiTags,
+} from '@nestjs/swagger';

-@Injectable()
-export class JsonSchemaService implements OnModuleInit {
-  private ajv: Ajv;
-  private validators = new Map<string, any>();
-  private readonly logger = new Logger(JsonSchemaService.name);
+import { JsonSchemaService } from './json-schema.service';
+import { SchemaMigrationService } from './services/schema-migration.service';

+import { CreateJsonSchemaDto } from './dto/create-json-schema.dto';
+import { MigrateDataDto } from './dto/migrate-data.dto';
+import { SearchJsonSchemaDto } from './dto/search-json-schema.dto';
+import { UpdateJsonSchemaDto } from './dto/update-json-schema.dto';
+
+import { CurrentUser } from '../../common/decorators/current-user.decorator';
+import { RequirePermission } from '../../common/decorators/require-permission.decorator';
+import { JwtAuthGuard } from '../../common/guards/jwt-auth.guard';
+import { RbacGuard } from '../../common/guards/rbac.guard';
+import { User } from '../user/entities/user.entity';
+
+@ApiTags('JSON Schemas Management')
+@ApiBearerAuth()
+@UseGuards(JwtAuthGuard, RbacGuard)
+@Controller('json-schemas')
+export class JsonSchemaController {
  constructor(
-    @InjectRepository(JsonSchema)
-    private schemaRepo: Repository<JsonSchema>,
+    private readonly jsonSchemaService: JsonSchemaService,
+    private readonly migrationService: SchemaMigrationService,
+  ) {}
+
+  // ----------------------------------------------------------------------
+  // Schema Management (CRUD)
+  // ----------------------------------------------------------------------
+
+  @Post()
+  @ApiOperation({
+    summary: 'Create a new schema or new version of existing schema',
+  })
+  @ApiResponse({
+    status: 201,
+    description: 'The schema has been successfully created.',
+  })
+  @RequirePermission('system.manage_all') // Admin Only
+  create(@Body() createDto: CreateJsonSchemaDto) {
+    return this.jsonSchemaService.create(createDto);
+  }
+
+  @Get()
+  @ApiOperation({ summary: 'List all schemas with pagination and filtering' })
+  @RequirePermission('document.view') // Viewer+ can see schemas
+  findAll(@Query() searchDto: SearchJsonSchemaDto) {
+    return this.jsonSchemaService.findAll(searchDto);
+  }
+
+  @Get(':id')
+  @ApiOperation({ summary: 'Get a specific schema version by ID' })
+  @RequirePermission('document.view')
+  findOne(@Param('id', ParseIntPipe) id: number) {
+    return this.jsonSchemaService.findOne(id);
+  }
+
+  @Get('latest/:code')
+  @ApiOperation({
+    summary: 'Get the latest active version of a schema by code',
+  })
+  @ApiParam({ name: 'code', description: 'Schema Code (e.g., RFA_DWG)' })
+  @RequirePermission('document.view')
+  findLatest(@Param('code') code: string) {
+    return this.jsonSchemaService.findLatestByCode(code);
+  }
+
+  @Patch(':id')
+  @ApiOperation({
+    summary: 'Update a specific schema (Not recommended for active schemas)',
+  })
+  @RequirePermission('system.manage_all')
+  update(
+    @Param('id', ParseIntPipe) id: number,
+    @Body() updateDto: UpdateJsonSchemaDto,
  ) {
-    this.ajv = new Ajv({ allErrors: true, strict: false });
-    addFormats(this.ajv);
+    return this.jsonSchemaService.update(id, updateDto);
  }

-  async onModuleInit() {
-    // Pre-load schemas (Optional for performance)
-    // const schemas = await this.schemaRepo.find({ where: { isActive: true } });
-    // schemas.forEach(s => this.createValidator(s.schemaCode, s.schemaDefinition));
+  @Delete(':id')
+  @ApiOperation({ summary: 'Delete a schema version (Hard Delete)' })
+  @RequirePermission('system.manage_all')
+  remove(@Param('id', ParseIntPipe) id: number) {
+    return this.jsonSchemaService.remove(id);
  }

-  /**
-   * ตรวจสอบข้อมูล JSON ว่าถูกต้องตาม Schema หรือไม่
-   */
-  async validate(schemaCode: string, data: any): Promise<boolean> {
-    let validate = this.validators.get(schemaCode);
+  // ----------------------------------------------------------------------
+  // Validation & Security
+  // ----------------------------------------------------------------------

-    if (!validate) {
-      const schema = await this.schemaRepo.findOne({
-        where: { schemaCode, isActive: true },
-      });
-
-      if (!schema) {
-        throw new NotFoundException(`JSON Schema '${schemaCode}' not found`);
-      }
-
-      try {
-        validate = this.ajv.compile(schema.schemaDefinition);
-        this.validators.set(schemaCode, validate);
-      } catch (error: any) {
-        throw new BadRequestException(
-          `Invalid Schema Definition for '${schemaCode}': ${error.message}`,
-        );
-      }
-    }
-
-    const valid = validate(data);
-
-    if (!valid) {
-      const errors = validate.errors
-        ?.map((e: any) => `${e.instancePath} ${e.message}`)
-        .join(', ');
-      // โยน Error กลับไปเพื่อให้ Controller/Service ปลายทางจัดการ
-      throw new BadRequestException(`JSON Validation Failed: ${errors}`);
-    }
-
-    return true;
+  @Post('validate/:code')
+  @HttpCode(HttpStatus.OK)
+  @ApiOperation({ summary: 'Validate data against the latest schema version' })
+  @ApiResponse({
+    status: 200,
+    description: 'Validation result including errors and sanitized data',
+  })
+  @RequirePermission('document.view')
+  async validate(@Param('code') code: string, @Body() data: any) {
+    // Note: Validation API นี้ใช้สำหรับ Test หรือ Pre-check เท่านั้น
+    // การ Save จริงจะเรียกผ่าน Service ภายใน
+    return this.jsonSchemaService.validateData(code, data);
  }

-  /**
-   * สร้างหรืออัปเดต Schema
-   */
-  async createOrUpdate(schemaCode: string, definition: Record<string, any>) {
-    // 1. ตรวจสอบว่า Definition เป็น JSON Schema ที่ถูกต้องไหม
-    try {
-      this.ajv.compile(definition);
-    } catch (error: any) {
-      throw new BadRequestException(
-        `Invalid JSON Schema format: ${error.message}`,
-      );
-    }
+  @Post('read/:code')
+  @HttpCode(HttpStatus.OK)
+  @ApiOperation({
+    summary: 'Process read data (Decrypt & Filter) based on user roles',
+  })
+  @RequirePermission('document.view')
+  async processReadData(
+    @Param('code') code: string,
+    @Body() data: any,
+    @CurrentUser() user: User,
+  ) {
+    // แปลง User Entity เป็น Security Context
+    // แก้ไข TS2339 & TS7006: Type Casting เพื่อให้เข้าถึง roles ได้โดยไม่ error
+    // เนื่องจาก User Entity ปกติไม่มี property roles (แต่อาจถูก Inject มาตอน Runtime หรือผ่าน Assignments)
+    const userWithRoles = user as any;
+    const userRoles = userWithRoles.roles
+      ? userWithRoles.roles.map((r: any) => r.roleName)
+      : [];

-    // 2. บันทึกลง DB
-    let schema = await this.schemaRepo.findOne({ where: { schemaCode } });
+    return this.jsonSchemaService.processReadData(code, data, { userRoles });
+  }

-    if (schema) {
-      schema.schemaDefinition = definition;
-      schema.version += 1;
-    } else {
-      schema = this.schemaRepo.create({
-        schemaCode,
-        schemaDefinition: definition,
-        version: 1,
-      });
-    }
+  // ----------------------------------------------------------------------
+  // Data Migration
+  // ----------------------------------------------------------------------

-    const savedSchema = await this.schemaRepo.save(schema);
-
-    // 3. Clear Cache เพื่อให้ครั้งหน้าโหลดตัวใหม่
-    this.validators.delete(schemaCode);
-    this.logger.log(`Schema '${schemaCode}' updated (v${savedSchema.version})`);
-
-    return savedSchema;
+  @Post('migrate/:table/:id')
+  @HttpCode(HttpStatus.OK)
+  @ApiOperation({
+    summary: 'Migrate specific entity data to target schema version',
+  })
+  @ApiParam({ name: 'table', description: 'Table Name (e.g. rfa_revisions)' })
+  @ApiParam({ name: 'id', description: 'Entity ID' })
+  @RequirePermission('system.manage_all') // Dangerous Op -> Admin Only
+  async migrateData(
+    @Param('table') tableName: string,
+    @Param('id', ParseIntPipe) id: number,
+    @Body() dto: MigrateDataDto,
+  ) {
+    return this.migrationService.migrateData(
+      tableName,
+      id,
+      dto.targetSchemaCode,
+      dto.targetVersion,
+    );
  }
 }
--- a/backend/src/modules/json-schema/services/json-security.service.ts
+++ b/backend/src/modules/json-schema/services/json-security.service.ts
@@ -0,0 +1,113 @@
+// File: src/modules/json-schema/services/json-security.service.ts
+import { Injectable } from '@nestjs/common';
+import { CryptoService } from '../../../common/services/crypto.service';
+
+export interface SecurityContext {
+  userRoles: string[]; // Role ของ user ปัจจุบัน (เช่น ['EDITOR', 'viewer'])
+}
+
+@Injectable()
+export class JsonSecurityService {
+  constructor(private readonly cryptoService: CryptoService) {}
+
+  /**
+   * ขาเข้า (Write): เข้ารหัสข้อมูล Sensitive ก่อนบันทึก
+   */
+  encryptFields(data: any, schemaDefinition: any): any {
+    if (!data || typeof data !== 'object') return data;
+    const processed = Array.isArray(data) ? [...data] : { ...data };
+
+    // Traverse schema properties
+    if (schemaDefinition.properties) {
+      for (const [key, propSchema] of Object.entries<any>(
+        schemaDefinition.properties,
+      )) {
+        if (data[key] !== undefined) {
+          // 1. Check encryption flag
+          if (propSchema['x-encrypt'] === true) {
+            processed[key] = this.cryptoService.encrypt(data[key]);
+          }
+
+          // 2. Recursive for nested objects/arrays
+          if (propSchema.type === 'object' && propSchema.properties) {
+            processed[key] = this.encryptFields(data[key], propSchema);
+          } else if (propSchema.type === 'array' && propSchema.items) {
+            if (Array.isArray(data[key])) {
+              processed[key] = data[key].map((item: any) =>
+                this.encryptFields(item, propSchema.items),
+              );
+            }
+          }
+        }
+      }
+    }
+    return processed;
+  }
+
+  /**
+   * ขาออก (Read): ถอดรหัส และ กรองข้อมูลตามสิทธิ์
+   */
+  decryptAndFilterFields(
+    data: any,
+    schemaDefinition: any,
+    context: SecurityContext,
+  ): any {
+    if (!data || typeof data !== 'object') return data;
+
+    // Clone data to avoid mutation
+    const processed = Array.isArray(data) ? [...data] : { ...data };
+
+    if (schemaDefinition.properties) {
+      for (const [key, propSchema] of Object.entries<any>(
+        schemaDefinition.properties,
+      )) {
+        if (data[key] !== undefined) {
+          // 1. Decrypt (ถ้ามีค่าและถูกเข้ารหัสไว้)
+          if (propSchema['x-encrypt'] === true) {
+            processed[key] = this.cryptoService.decrypt(data[key]);
+          }
+
+          // 2. Security Check (Role-based Access Control)
+          if (propSchema['x-security']) {
+            const rule = propSchema['x-security'];
+            const requiredRoles = rule.roles || [];
+            const hasPermission = requiredRoles.some(
+              (role: string) =>
+                context.userRoles.includes(role) ||
+                context.userRoles.includes('SUPERADMIN'),
+            );
+
+            if (!hasPermission) {
+              if (rule.onDeny === 'REMOVE') {
+                delete processed[key];
+                continue; // ข้ามไป field ถัดไป
+              } else {
+                // Default: MASK
+                processed[key] = '********';
+              }
+            }
+          }
+
+          // 3. Recursive for nested objects/arrays
+          // (ทำต่อเมื่อ Field ยังไม่ถูกลบ)
+          if (processed[key] !== undefined) {
+            if (propSchema.type === 'object' && propSchema.properties) {
+              processed[key] = this.decryptAndFilterFields(
+                processed[key],
+                propSchema,
+                context,
+              );
+            } else if (propSchema.type === 'array' && propSchema.items) {
+              if (Array.isArray(processed[key])) {
+                processed[key] = processed[key].map((item: any) =>
+                  this.decryptAndFilterFields(item, propSchema.items, context),
+                );
+              }
+            }
+          }
+        }
+      }
+    }
+    return processed;
+  }
+}
--- a/backend/src/modules/json-schema/services/schema-migration.service.ts
+++ b/backend/src/modules/json-schema/services/schema-migration.service.ts
@@ -0,0 +1,205 @@
+// File: src/modules/json-schema/services/schema-migration.service.ts
+import { Injectable, Logger, BadRequestException } from '@nestjs/common';
+import { DataSource } from 'typeorm';
+import { JsonSchemaService } from '../json-schema.service';
+
+export interface MigrationStep {
+  type:
+    | 'FIELD_RENAME'
+    | 'FIELD_TRANSFORM'
+    | 'FIELD_ADD'
+    | 'FIELD_REMOVE'
+    | 'STRUCTURE_CHANGE';
+  config: any;
+}
+
+export interface MigrationResult {
+  success: boolean;
+  fromVersion: number;
+  toVersion: number;
+  migratedFields: string[];
+  error?: string;
+}
+
+@Injectable()
+export class SchemaMigrationService {
+  private readonly logger = new Logger(SchemaMigrationService.name);
+
+  constructor(
+    private readonly dataSource: DataSource,
+    private readonly jsonSchemaService: JsonSchemaService,
+  ) {}
+
+  /**
+   * Migrate data for a specific entity to a target schema version
+   */
+  async migrateData(
+    entityType: string, // e.g., 'rfa_revisions', 'correspondence_revisions'
+    entityId: number,
+    targetSchemaCode: string,
+    targetVersion?: number,
+  ): Promise<MigrationResult> {
+    const queryRunner = this.dataSource.createQueryRunner();
+    await queryRunner.connect();
+    await queryRunner.startTransaction();
+
+    try {
+      // 1. Get Target Schema
+      let targetSchema;
+      if (targetVersion) {
+        targetSchema = await this.jsonSchemaService.findOneByCodeAndVersion(
+          targetSchemaCode,
+          targetVersion,
+        );
+      } else {
+        targetSchema =
+          await this.jsonSchemaService.findLatestByCode(targetSchemaCode);
+      }
+
+      // 2. Fetch Entity Data & Current Version
+      // Note: This assumes the entity table has 'details' (json) and 'schema_version' (int) columns
+      // If schema_version is not present, we assume version 1
+      const entity = await queryRunner.manager.query(
+        `SELECT details, schema_version FROM ${entityType} WHERE id = ?`,
+        [entityId],
+      );
+
+      if (!entity || entity.length === 0) {
+        throw new BadRequestException(
+          `Entity ${entityType} with ID ${entityId} not found.`,
+        );
+      }
+
+      const currentData = entity[0].details || {};
+      const currentVersion = entity[0].schema_version || 1;
+
+      if (currentVersion >= targetSchema.version) {
+        return {
+          success: true,
+          fromVersion: currentVersion,
+          toVersion: currentVersion,
+          migratedFields: [], // No migration needed
+        };
+      }
+
+      // 3. Find Migration Path (Iterative Upgrade)
+      let migratedData = JSON.parse(JSON.stringify(currentData));
+      const migratedFields: string[] = [];
+
+      // Loop from current version up to target version
+      for (let v = currentVersion + 1; v <= targetSchema.version; v++) {
+        const schemaVer = await this.jsonSchemaService.findOneByCodeAndVersion(
+          targetSchemaCode,
+          v,
+        );
+
+        if (schemaVer && schemaVer.migrationScript) {
+          this.logger.log(
+            `Applying migration script for ${targetSchemaCode} v${v}...`,
+          );
+
+          const script = schemaVer.migrationScript;
+
+          // Apply steps defined in migrationScript
+          if (Array.isArray(script.steps)) {
+            for (const step of script.steps) {
+              migratedData = await this.applyMigrationStep(step, migratedData);
+              if (step.config.field || step.config.new_field) {
+                migratedFields.push(step.config.new_field || step.config.field);
+              }
+            }
+          }
+        }
+      }
+
+      // 4. Validate Migrated Data against Target Schema
+      const validation = await this.jsonSchemaService.validateData(
+        targetSchema.schemaCode,
+        migratedData,
+      );
+
+      if (!validation.isValid) {
+        throw new BadRequestException(
+          `Migration failed: Resulting data does not match target schema v${targetSchema.version}. Errors: ${JSON.stringify(validation.errors)}`,
+        );
+      }
+
+      // 5. Save Migrated Data
+      // Update details AND schema_version
+      await queryRunner.manager.query(
+        `UPDATE ${entityType} SET details = ?, schema_version = ? WHERE id = ?`,
+        [
+          JSON.stringify(validation.sanitizedData),
+          targetSchema.version,
+          entityId,
+        ],
+      );
+
+      await queryRunner.commitTransaction();
+
+      return {
+        success: true,
+        fromVersion: currentVersion,
+        toVersion: targetSchema.version,
+        migratedFields: [...new Set(migratedFields)],
+      };
+    } catch (err: any) {
+      await queryRunner.rollbackTransaction();
+      this.logger.error(`Migration failed: ${err.message}`, err.stack);
+      throw err;
+    } finally {
+      await queryRunner.release();
+    }
+  }
+
+  /**
+   * Apply a single migration step
+   */
+  private async applyMigrationStep(
+    step: MigrationStep,
+    data: any,
+  ): Promise<any> {
+    const newData = { ...data };
+
+    switch (step.type) {
+      case 'FIELD_RENAME':
+        if (newData[step.config.old_field] !== undefined) {
+          newData[step.config.new_field] = newData[step.config.old_field];
+          delete newData[step.config.old_field];
+        }
+        break;
+
+      case 'FIELD_ADD':
+        if (newData[step.config.field] === undefined) {
+          newData[step.config.field] = step.config.default_value;
+        }
+        break;
+
+      case 'FIELD_REMOVE':
+        delete newData[step.config.field];
+        break;
+
+      case 'FIELD_TRANSFORM':
+        if (newData[step.config.field] !== undefined) {
+          // Simple transform logic (e.g., map values)
+          if (step.config.transform === 'MAP_VALUES' && step.config.mapping) {
+            const oldVal = newData[step.config.field];
+            newData[step.config.field] = step.config.mapping[oldVal] || oldVal;
+          }
+          // Type casting
+          else if (step.config.transform === 'TO_NUMBER') {
+            newData[step.config.field] = Number(newData[step.config.field]);
+          } else if (step.config.transform === 'TO_STRING') {
+            newData[step.config.field] = String(newData[step.config.field]);
+          }
+        }
+        break;
+
+      default:
+        this.logger.warn(`Unknown migration step type: ${step.type}`);
+    }
+
+    return newData;
+  }
+}
+
--- a/backend/src/modules/json-schema/services/ui-schema.service.ts
+++ b/backend/src/modules/json-schema/services/ui-schema.service.ts
@@ -0,0 +1,115 @@
+// File: src/modules/json-schema/services/ui-schema.service.ts
+import { Injectable, BadRequestException, Logger } from '@nestjs/common';
+import { UiSchema, UiSchemaField } from '../interfaces/ui-schema.interface';
+
+@Injectable()
+export class UiSchemaService {
+  private readonly logger = new Logger(UiSchemaService.name);
+
+  /**
+   * ตรวจสอบความถูกต้องของ UI Schema
+   */
+  validateUiSchema(uiSchema: UiSchema, dataSchema: any): boolean {
+    if (!uiSchema) return true; // Optional field
+
+    // 1. Validate Structure เบื้องต้น
+    if (!uiSchema.layout || !uiSchema.fields) {
+      throw new BadRequestException(
+        'UI Schema must contain "layout" and "fields" properties.',
+      );
+    }
+
+    // 2. ตรวจสอบว่า Fields ใน Layout มีคำนิยามครบถ้วน
+    const definedFields = new Set(Object.keys(uiSchema.fields));
+    const layoutFields = new Set<string>();
+
+    uiSchema.layout.groups.forEach((group) => {
+      group.fields.forEach((fieldKey) => {
+        layoutFields.add(fieldKey);
+        if (!definedFields.has(fieldKey)) {
+          throw new BadRequestException(
+            `Field "${fieldKey}" used in layout "${group.title}" is not defined in "fields".`,
+          );
+        }
+      });
+    });
+
+    // 3. (Optional) ตรวจสอบว่า Fields ใน Data Schema (AJV) มีครบใน UI Schema หรือไม่
+    // ถ้า Data Schema บอกว่ามี field 'title' แต่ UI Schema ไม่มี -> Frontend อาจจะไม่เรนเดอร์
+    if (dataSchema && dataSchema.properties) {
+      const dataKeys = Object.keys(dataSchema.properties);
+      const missingFields = dataKeys.filter((key) => !definedFields.has(key));
+
+      if (missingFields.length > 0) {
+        this.logger.warn(
+          `Data schema properties [${missingFields.join(', ')}] are missing from UI Schema.`,
+        );
+        // ไม่ Throw Error เพราะบางทีเราอาจตั้งใจซ่อน Field (Hidden field)
+      }
+    }
+
+    return true;
+  }
+
+  /**
+   * สร้าง UI Schema พื้นฐานจาก Data Schema (AJV) อัตโนมัติ
+   * ใช้กรณี user ไม่ได้ส่ง UI Schema มาให้
+   */
+  generateDefaultUiSchema(dataSchema: any): UiSchema {
+    if (!dataSchema || !dataSchema.properties) {
+      return {
+        layout: { type: 'stack', groups: [] },
+        fields: {},
+      };
+    }
+
+    const fields: { [key: string]: UiSchemaField } = {};
+    const groupFields: string[] = [];
+
+    for (const [key, value] of Object.entries<any>(dataSchema.properties)) {
+      groupFields.push(key);
+
+      fields[key] = {
+        type: value.type || 'string',
+        title: value.title || this.humanize(key),
+        description: value.description,
+        required: (dataSchema.required || []).includes(key),
+        widget: this.guessWidget(value),
+        colSpan: 12, // Default full width
+      };
+    }
+
+    return {
+      layout: {
+        type: 'stack',
+        groups: [
+          {
+            id: 'default',
+            title: 'General Information',
+            type: 'section',
+            fields: groupFields,
+          },
+        ],
+      },
+      fields,
+    };
+  }
+
+  // Helpers
+  private humanize(str: string): string {
+    return str
+      .replace(/([A-Z])/g, ' $1')
+      .replace(/^./, (str) => str.toUpperCase())
+      .trim();
+  }
+
+  private guessWidget(schemaProp: any): any {
+    if (schemaProp.enum) return 'select';
+    if (schemaProp.type === 'boolean') return 'checkbox';
+    if (schemaProp.format === 'date') return 'date';
+    if (schemaProp.format === 'date-time') return 'datetime';
+    if (schemaProp.format === 'binary') return 'file-upload';
+    return 'text';
+  }
+}
+
--- a/backend/src/modules/json-schema/services/virtual-column.service.ts
+++ b/backend/src/modules/json-schema/services/virtual-column.service.ts
@@ -0,0 +1,152 @@
+// File: src/modules/json-schema/services/virtual-column.service.ts
+import { Injectable, Logger } from '@nestjs/common';
+import { DataSource, QueryRunner } from 'typeorm';
+import { VirtualColumnConfig } from '../entities/json-schema.entity';
+
+@Injectable()
+export class VirtualColumnService {
+  private readonly logger = new Logger(VirtualColumnService.name);
+
+  constructor(private readonly dataSource: DataSource) {}
+
+  /**
+   * สร้าง/อัปเดต Virtual Columns และ Index บน Database จริง
+   */
+  async setupVirtualColumns(tableName: string, configs: VirtualColumnConfig[]) {
+    if (!configs || configs.length === 0) return;
+
+    // ใช้ QueryRunner เพื่อให้จัดการ Transaction หรือ Connection ได้ละเอียด
+    const queryRunner = this.dataSource.createQueryRunner();
+    await queryRunner.connect();
+
+    try {
+      this.logger.log(
+        `Start setting up virtual columns for table '${tableName}'...`,
+      );
+
+      // 1. ตรวจสอบว่าตารางมีอยู่จริงไหม
+      const tableExists = await queryRunner.hasTable(tableName);
+      if (!tableExists) {
+        this.logger.warn(
+          `Table '${tableName}' not found. Skipping virtual columns.`,
+        );
+        return;
+      }
+
+      for (const config of configs) {
+        await this.ensureVirtualColumn(queryRunner, tableName, config);
+
+        if (config.index_type) {
+          await this.ensureIndex(queryRunner, tableName, config);
+        }
+      }
+
+      this.logger.log(
+        `Finished setting up virtual columns for '${tableName}'.`,
+      );
+    } catch (err: any) {
+      this.logger.error(
+        `Failed to setup virtual columns: ${err.message}`,
+        err.stack,
+      );
+      throw err;
+    } finally {
+      await queryRunner.release();
+    }
+  }
+
+  /**
+   * สร้าง Column ถ้ายังไม่มี
+   */
+  private async ensureVirtualColumn(
+    queryRunner: QueryRunner,
+    tableName: string,
+    config: VirtualColumnConfig,
+  ) {
+    const hasColumn = await queryRunner.hasColumn(
+      tableName,
+      config.column_name,
+    );
+
+    if (!hasColumn) {
+      const sql = this.generateAddColumnSql(tableName, config);
+      this.logger.log(`Executing: ${sql}`);
+      await queryRunner.query(sql);
+    } else {
+      // TODO: (Advance) ถ้ามี Column แล้ว แต่ Definition เปลี่ยน อาจต้อง ALTER MODIFY
+      this.logger.debug(
+        `Column '${config.column_name}' already exists in '${tableName}'.`,
+      );
+    }
+  }
+
+  /**
+   * สร้าง Index ถ้ายังไม่มี
+   */
+  private async ensureIndex(
+    queryRunner: QueryRunner,
+    tableName: string,
+    config: VirtualColumnConfig,
+  ) {
+    const indexName = `idx_${tableName}_${config.column_name}`;
+
+    // ตรวจสอบว่า Index มีอยู่จริงไหม (Query จาก information_schema เพื่อความชัวร์)
+    const checkIndexSql = `
+      SELECT COUNT(1) as count
+      FROM information_schema.STATISTICS
+      WHERE table_schema = DATABASE()
+      AND table_name = ?
+      AND index_name = ?
+    `;
+    const result = await queryRunner.query(checkIndexSql, [
+      tableName,
+      indexName,
+    ]);
+
+    if (result[0].count == 0) {
+      const sql = `CREATE ${config.index_type === 'UNIQUE' ? 'UNIQUE' : ''} INDEX ${indexName} ON ${tableName} (${config.column_name})`;
+      this.logger.log(`Creating Index: ${sql}`);
+      await queryRunner.query(sql);
+    }
+  }
+
+  /**
+   * Generate SQL สำหรับ MariaDB 10.11 Virtual Column
+   * Syntax: ADD COLUMN name type GENERATED ALWAYS AS (expr) VIRTUAL
+   */
+  private generateAddColumnSql(
+    tableName: string,
+    config: VirtualColumnConfig,
+  ): string {
+    const dbType = this.mapDataTypeToSql(config.data_type);
+    // JSON_UNQUOTE(JSON_EXTRACT(details, '$.path'))
+    // ใช้ 'details' เป็นชื่อ column JSON หลัก (ต้องตรงกับ Database Schema ที่ออกแบบไว้)
+    const expression = `JSON_UNQUOTE(JSON_EXTRACT(details, '${config.json_path}'))`;
+
+    // Handle Type Casting inside expression if needed,
+    // but usually MariaDB handles string return from JSON_EXTRACT.
+    // For INT/DATE, virtual column type definition enforces it.
+
+    return `ALTER TABLE ${tableName} ADD COLUMN ${config.column_name} ${dbType} GENERATED ALWAYS AS (${expression}) VIRTUAL`;
+  }
+
+  private mapDataTypeToSql(type: string): string {
+    switch (type) {
+      case 'INT':
+        return 'INT';
+      case 'VARCHAR':
+        return 'VARCHAR(255)';
+      case 'BOOLEAN':
+        return 'TINYINT(1)';
+      case 'DATE':
+        return 'DATE';
+      case 'DATETIME':
+        return 'DATETIME';
+      case 'DECIMAL':
+        return 'DECIMAL(10,2)';
+      default:
+        return 'VARCHAR(255)';
+    }
+  }
+}
+
--- a/backend/src/modules/rfa/dto/create-rfa-revision.dto.ts
+++ b/backend/src/modules/rfa/dto/create-rfa-revision.dto.ts
@@ -0,0 +1,52 @@
+// File: src/modules/rfa/dto/create-rfa-revision.dto.ts
+import {
+  IsString,
+  IsNotEmpty,
+  IsInt,
+  IsOptional,
+  IsDateString,
+  IsObject,
+  IsArray,
+} from 'class-validator';
+
+export class CreateRfaRevisionDto {
+  @IsString()
+  @IsNotEmpty()
+  title!: string;
+
+  @IsInt()
+  @IsNotEmpty()
+  rfaStatusCodeId!: number;
+
+  @IsInt()
+  @IsOptional()
+  rfaApproveCodeId?: number;
+
+  @IsDateString()
+  @IsOptional()
+  documentDate?: string;
+
+  @IsDateString()
+  @IsOptional()
+  issuedDate?: string;
+
+  @IsDateString()
+  @IsOptional()
+  receivedDate?: string;
+
+  @IsDateString()
+  @IsOptional()
+  approvedDate?: string;
+
+  @IsString()
+  @IsOptional()
+  description?: string;
+
+  @IsObject()
+  @IsOptional()
+  details?: Record<string, any>;
+
+  @IsArray()
+  @IsOptional()
+  shopDrawingRevisionIds?: number[]; // IDs of linked Shop Drawings
+}
--- a/backend/src/modules/rfa/dto/create-rfa-workflow.dto.ts
+++ b/backend/src/modules/rfa/dto/create-rfa-workflow.dto.ts
@@ -0,0 +1,37 @@
+// File: src/modules/rfa/dto/create-rfa-workflow.dto.ts
+import {
+  IsInt,
+  IsNotEmpty,
+  IsOptional,
+  IsEnum,
+  IsString,
+} from 'class-validator';
+
+export enum RfaActionType {
+  REVIEW = 'REVIEW',
+  APPROVE = 'APPROVE',
+  ACKNOWLEDGE = 'ACKNOWLEDGE',
+}
+
+export class CreateRfaWorkflowDto {
+  @IsInt()
+  @IsNotEmpty()
+  stepNumber!: number;
+
+  @IsInt()
+  @IsNotEmpty()
+  organizationId!: number;
+
+  @IsInt()
+  @IsOptional()
+  assignedTo?: number;
+
+  @IsEnum(RfaActionType)
+  @IsOptional()
+  actionType?: RfaActionType;
+
+  @IsString()
+  @IsOptional()
+  comments?: string;
+}
+
--- a/backend/src/modules/rfa/dto/create-rfa.dto.ts
+++ b/backend/src/modules/rfa/dto/create-rfa.dto.ts
@@ -1,37 +1,26 @@
-// File: src/modules/rfa/dto/create-rfa.dto.ts
+// File: src/modules/rfa/dto/create-rfa-revision.dto.ts
 import {
-  IsInt,
  IsString,
+  IsNotEmpty,
+  IsInt,
  IsOptional,
  IsDateString,
+  IsObject,
  IsArray,
-  IsNotEmpty,
 } from 'class-validator';

-export class CreateRfaDto {
-  @IsInt()
-  @IsNotEmpty()
-  projectId!: number;
-
-  @IsInt()
-  @IsNotEmpty()
-  rfaTypeId!: number;
-
-  @IsInt()
-  @IsOptional()
-  disciplineId?: number; // [Req 6B] สาขางาน (จำเป็นสำหรับการรันเลข RFA)
-
+export class CreateRfaRevisionDto {
  @IsString()
  @IsNotEmpty()
  title!: string;

  @IsInt()
  @IsNotEmpty()
-  toOrganizationId!: number; // ส่งถึงใคร (สำหรับ Routing Step 1)
+  rfaStatusCodeId!: number;

-  @IsString()
+  @IsInt()
  @IsOptional()
-  description?: string;
+  rfaApproveCodeId?: number;

  @IsDateString()
  @IsOptional()
@@ -39,10 +28,25 @@ export class CreateRfaDto {

  @IsDateString()
  @IsOptional()
-  dueDate?: string; // กำหนดวันตอบกลับ
+  issuedDate?: string;
+
+  @IsDateString()
+  @IsOptional()
+  receivedDate?: string;
+
+  @IsDateString()
+  @IsOptional()
+  approvedDate?: string;
+
+  @IsString()
+  @IsOptional()
+  description?: string;
+
+  @IsObject()
+  @IsOptional()
+  details?: Record<string, any>;

  @IsArray()
-  @IsInt({ each: true })
  @IsOptional()
-  shopDrawingRevisionIds?: number[]; // Shop Drawings ที่แนบมา
-}
+  shopDrawingRevisionIds?: number[]; // IDs of linked Shop Drawings
+}
--- a/backend/src/modules/rfa/dto/update-rfa.dto.ts
+++ b/backend/src/modules/rfa/dto/update-rfa.dto.ts
@@ -1,4 +1,4 @@
 import { PartialType } from '@nestjs/swagger';
-import { CreateRfaDto } from './create-rfa.dto';
+import { CreateRfaRevisionDto } from './create-rfa-revision.dto';

-export class UpdateRfaDto extends PartialType(CreateRfaDto) {}
+export class UpdateRfaDto extends PartialType(CreateRfaRevisionDto) {}
--- a/backend/src/modules/rfa/entities/rfa-revision.entity.ts
+++ b/backend/src/modules/rfa/entities/rfa-revision.entity.ts
@@ -1,3 +1,4 @@
+// File: src/modules/rfa/entities/rfa-revision.entity.ts
 import {
  Entity,
  PrimaryGeneratedColumn,
@@ -8,6 +9,7 @@ import {
  JoinColumn,
  OneToMany,
  Unique,
+  Index,
 } from 'typeorm';
 import { Rfa } from './rfa.entity';
 import { Correspondence } from '../../correspondence/entities/correspondence.entity';
@@ -15,7 +17,7 @@ import { RfaStatusCode } from './rfa-status-code.entity';
 import { RfaApproveCode } from './rfa-approve-code.entity';
 import { User } from '../../user/entities/user.entity';
 import { RfaItem } from './rfa-item.entity';
-import { RfaWorkflow } from './rfa-workflow.entity'; // Import เพิ่ม
+import { RfaWorkflow } from './rfa-workflow.entity';

@Entity('rfa_revisions')
@Unique(['rfaId', 'revisionNumber'])
@@ -63,6 +65,20 @@ export class RfaRevision {
  @Column({ type: 'text', nullable: true })
  description?: string;

+  // ✅ [New] เพิ่ม field details สำหรับเก็บข้อมูล Dynamic ของ RFA (เช่น Method Statement Details)
+  @Column({ type: 'json', nullable: true })
+  details?: any;
+
+  // ✅ [New] Virtual Column: ดึงจำนวนแบบที่แนบ (drawingCount) จาก JSON
+  @Column({
+    name: 'v_ref_drawing_count',
+    type: 'int',
+    generatedType: 'VIRTUAL',
+    asExpression: "JSON_UNQUOTE(JSON_EXTRACT(details, '$.drawingCount'))",
+    nullable: true,
+  })
+  vRefDrawingCount?: number;
+
  @CreateDateColumn({ name: 'created_at' })
  createdAt!: Date;

--- a/backend/src/modules/workflow-engine/entities/workflow-history.entity.ts
+++ b/backend/src/modules/workflow-engine/entities/workflow-history.entity.ts
@@ -0,0 +1,44 @@
+// File: src/modules/workflow-engine/entities/workflow-history.entity.ts
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  JoinColumn,
+  ManyToOne,
+  PrimaryGeneratedColumn,
+} from 'typeorm';
+import { WorkflowInstance } from './workflow-instance.entity';
+
+@Entity('workflow_histories')
+export class WorkflowHistory {
+  @PrimaryGeneratedColumn('uuid')
+  id!: string;
+
+  @ManyToOne(() => WorkflowInstance, { onDelete: 'CASCADE' })
+  @JoinColumn({ name: 'instance_id' })
+  instance!: WorkflowInstance;
+
+  @Column({ name: 'instance_id' })
+  instanceId!: string;
+
+  @Column({ name: 'from_state', length: 50 })
+  fromState!: string;
+
+  @Column({ name: 'to_state', length: 50 })
+  toState!: string;
+
+  @Column({ length: 50 })
+  action!: string;
+
+  @Column({ name: 'action_by_user_id', nullable: true })
+  actionByUserId?: number; // User ID ของผู้ดำเนินการ
+
+  @Column({ type: 'text', nullable: true })
+  comment?: string;
+
+  @Column({ type: 'json', nullable: true })
+  metadata?: Record<string, any>; // เก็บข้อมูลเพิ่มเติม เช่น Snapshot ของ Context ณ ตอนนั้น
+
+  @CreateDateColumn({ name: 'created_at' })
+  createdAt!: Date;
+}
--- a/backend/src/modules/workflow-engine/entities/workflow-instance.entity.ts
+++ b/backend/src/modules/workflow-engine/entities/workflow-instance.entity.ts
@@ -0,0 +1,62 @@
+// File: src/modules/workflow-engine/entities/workflow-instance.entity.ts
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  Index,
+  JoinColumn,
+  ManyToOne,
+  PrimaryGeneratedColumn,
+  UpdateDateColumn,
+} from 'typeorm';
+import { WorkflowDefinition } from './workflow-definition.entity';
+
+export enum WorkflowStatus {
+  ACTIVE = 'ACTIVE',
+  COMPLETED = 'COMPLETED',
+  CANCELLED = 'CANCELLED',
+  TERMINATED = 'TERMINATED',
+}
+
+@Entity('workflow_instances')
+@Index(['entityType', 'entityId']) // Index สำหรับค้นหาตามเอกสาร
+@Index(['currentState']) // Index สำหรับ Filter ตามสถานะ
+export class WorkflowInstance {
+  @PrimaryGeneratedColumn('uuid')
+  id!: string;
+
+  // เชื่อมโยงกับ Definition ที่ใช้ตอนสร้าง Instance นี้
+  @ManyToOne(() => WorkflowDefinition)
+  @JoinColumn({ name: 'definition_id' })
+  definition!: WorkflowDefinition;
+
+  @Column({ name: 'definition_id' })
+  definitionId!: string;
+
+  // Polymorphic Relation: เชื่อมกับเอกสารได้หลายประเภท (RFA, CORR, etc.)
+  @Column({ name: 'entity_type', length: 50 })
+  entityType!: string;
+
+  @Column({ name: 'entity_id', length: 50 })
+  entityId!: string; // รองรับทั้ง ID แบบ Int และ UUID (เก็บเป็น String)
+
+  @Column({ name: 'current_state', length: 50 })
+  currentState!: string;
+
+  @Column({
+    type: 'enum',
+    enum: WorkflowStatus,
+    default: WorkflowStatus.ACTIVE,
+  })
+  status!: WorkflowStatus;
+
+  // Context เฉพาะของ Instance นี้ (เช่น ตัวแปรที่ส่งต่อระหว่าง State)
+  @Column({ type: 'json', nullable: true })
+  context?: Record<string, any>;
+
+  @CreateDateColumn({ name: 'created_at' })
+  createdAt!: Date;
+
+  @UpdateDateColumn({ name: 'updated_at' })
+  updatedAt!: Date;
+}
--- a/backend/src/modules/workflow-engine/workflow-dsl.service.ts
+++ b/backend/src/modules/workflow-engine/workflow-dsl.service.ts
@@ -1,6 +1,6 @@
 // File: src/modules/workflow-engine/workflow-dsl.service.ts

-import { Injectable, BadRequestException } from '@nestjs/common';
+import { BadRequestException, Injectable } from '@nestjs/common';

 export interface WorkflowState {
  initial?: boolean;
@@ -17,7 +17,7 @@ export interface TransitionRule {
 export interface RequirementRule {
  role?: string;
  user?: string;
-  condition?: string; // e.g. "amount > 5000" (Advanced)
+  condition?: string;
 }

 export interface EventRule {
@@ -36,11 +36,12 @@ export interface CompiledWorkflow {
 export class WorkflowDslService {
  /**
   * คอมไพล์ DSL Input ให้เป็น Standard Execution Tree
-   * @param dsl ข้อมูลดิบจาก User (JSON/Object)
-   * @returns CompiledWorkflow Object ที่พร้อมใช้งาน
   */
  compile(dsl: any): CompiledWorkflow {
-    // 1. Basic Structure Validation
+    if (!dsl || typeof dsl !== 'object') {
+      throw new BadRequestException('DSL must be a valid JSON object.');
+    }
+
    if (!dsl.states || !Array.isArray(dsl.states)) {
      throw new BadRequestException(
        'DSL syntax error: "states" array is required.',
@@ -55,7 +56,6 @@ export class WorkflowDslService {

    const stateMap = new Set<string>();

-    // 2. First Pass: Collect all state names and normalize structure
    for (const rawState of dsl.states) {
      if (!rawState.name) {
        throw new BadRequestException(
@@ -71,7 +71,6 @@ export class WorkflowDslService {
        transitions: {},
      };

-      // Normalize transitions "on:"
      if (rawState.on) {
        for (const [action, rule] of Object.entries(rawState.on)) {
          const rawRule = rule as any;
@@ -86,15 +85,11 @@ export class WorkflowDslService {
      compiled.states[rawState.name] = normalizedState;
    }

-    // 3. Second Pass: Validate Integrity
    this.validateIntegrity(compiled, stateMap);

    return compiled;
  }

-  /**
-   * ตรวจสอบความสมบูรณ์ของ Workflow Logic
-   */
  private validateIntegrity(compiled: CompiledWorkflow, stateMap: Set<string>) {
    let hasInitial = false;

@@ -107,19 +102,13 @@ export class WorkflowDslService {
        hasInitial = true;
      }

-      // ตรวจสอบ Transitions
      if (state.transitions) {
        for (const [action, rule] of Object.entries(state.transitions)) {
-          // 1. ปลายทางต้องมีอยู่จริง
          if (!stateMap.has(rule.to)) {
            throw new BadRequestException(
              `DSL Error: State "${stateName}" transitions via "${action}" to unknown state "${rule.to}".`,
            );
          }
-          // 2. Action name convention (Optional but recommended)
-          if (!/^[A-Z0-9_]+$/.test(action)) {
-            // Warning or Strict Error could be here
-          }
        }
      }
    }
@@ -129,18 +118,11 @@ export class WorkflowDslService {
    }
  }

-  /**
-   * ประเมินผล (Evaluate) การเปลี่ยนสถานะ
-   * @param compiled ข้อมูล Workflow ที่ Compile แล้ว
-   * @param currentState สถานะปัจจุบัน
-   * @param action การกระทำ
-   * @param context ข้อมูลประกอบ (User roles, etc.)
-   */
  evaluate(
    compiled: CompiledWorkflow,
    currentState: string,
    action: string,
-    context: any,
+    context: any = {}, // Default empty object
  ): { nextState: string; events: EventRule[] } {
    const stateConfig = compiled.states[currentState];

@@ -164,7 +146,6 @@ export class WorkflowDslService {
      );
    }

-    // Check Requirements (RBAC Logic inside Engine)
    if (transition.requirements && transition.requirements.length > 0) {
      this.checkRequirements(transition.requirements, context);
    }
@@ -175,22 +156,19 @@ export class WorkflowDslService {
    };
  }

-  /**
-   * ตรวจสอบเงื่อนไขสิทธิ์ (Requirements)
-   */
  private checkRequirements(requirements: RequirementRule[], context: any) {
-    const userRoles = context.roles || [];
-    const userId = context.userId;
+    const safeContext = context || {};
+    const userRoles = safeContext.roles || [];
+    const userId = safeContext.userId;

    const isAllowed = requirements.some((req) => {
-      // กรณีเช็ค Role
      if (req.role) {
        return userRoles.includes(req.role);
      }
-      // กรณีเช็ค Specific User
      if (req.user) {
        return userId === req.user;
      }
+      // Future: Add Condition Logic Evaluation here
      return false;
    });

--- a/backend/src/modules/workflow-engine/workflow-engine.controller.ts
+++ b/backend/src/modules/workflow-engine/workflow-engine.controller.ts
@@ -1,26 +1,27 @@
 // File: src/modules/workflow-engine/workflow-engine.controller.ts

 import {
-  Controller,
-  Post,
  Body,
+  Controller,
  Get,
-  Query,
-  Patch,
  Param,
+  ParseUUIDPipe,
+  Patch,
+  Post,
+  Query,
  UseGuards,
-} from '@nestjs/common'; // เพิ่ม Patch, Param
-import { ApiTags, ApiOperation, ApiResponse } from '@nestjs/swagger';
-import { WorkflowEngineService } from './workflow-engine.service';
+} from '@nestjs/common';
+import { ApiOperation, ApiResponse, ApiTags } from '@nestjs/swagger';
+import { JwtAuthGuard } from '../../common/guards/jwt-auth.guard';
 import { CreateWorkflowDefinitionDto } from './dto/create-workflow-definition.dto';
 import { EvaluateWorkflowDto } from './dto/evaluate-workflow.dto';
-import { GetAvailableActionsDto } from './dto/get-available-actions.dto'; // [NEW]
-import { UpdateWorkflowDefinitionDto } from './dto/update-workflow-definition.dto'; // [NEW]
-import { JwtAuthGuard } from '../../common/guards/jwt-auth.guard';
+import { GetAvailableActionsDto } from './dto/get-available-actions.dto';
+import { UpdateWorkflowDefinitionDto } from './dto/update-workflow-definition.dto';
+import { WorkflowEngineService } from './workflow-engine.service';

@ApiTags('Workflow Engine (DSL)')
@Controller('workflow-engine')
-@UseGuards(JwtAuthGuard) // Protect all endpoints
+@UseGuards(JwtAuthGuard)
 export class WorkflowEngineController {
  constructor(private readonly workflowService: WorkflowEngineService) {}

@@ -42,24 +43,20 @@ export class WorkflowEngineController {
  @Get('actions')
  @ApiOperation({ summary: 'Get available actions for current state' })
  async getAvailableActions(@Query() query: GetAvailableActionsDto) {
-    // [UPDATED] ใช้ DTO แทนแยก Query
    return this.workflowService.getAvailableActions(
      query.workflow_code,
      query.current_state,
    );
  }

-  // [OPTIONAL/RECOMMENDED] เพิ่ม Endpoint สำหรับ Update (PATCH)
  @Patch('definitions/:id')
  @ApiOperation({
-    summary: 'Update workflow status or details (e.g. Deactivate)',
+    summary: 'Update workflow status or details (DSL Re-compile)',
  })
  async updateDefinition(
-    @Param('id') id: string,
-    @Body() dto: UpdateWorkflowDefinitionDto, // [NEW] ใช้ Update DTO
+    @Param('id', ParseUUIDPipe) id: string, // เพิ่ม ParseUUIDPipe เพื่อ Validate ID
+    @Body() dto: UpdateWorkflowDefinitionDto,
  ) {
-    // *หมายเหตุ: คุณต้องไปเพิ่ม method update() ใน Service ด้วยถ้าจะใช้ Endpoint นี้
-    // return this.workflowService.update(id, dto);
-    return { message: 'Update logic not implemented yet', id, ...dto };
+    return this.workflowService.update(id, dto);
  }
 }
--- a/backend/src/modules/workflow-engine/workflow-engine.module.ts
+++ b/backend/src/modules/workflow-engine/workflow-engine.module.ts
@@ -2,21 +2,23 @@

 import { Module } from '@nestjs/common';
 import { TypeOrmModule } from '@nestjs/typeorm';
+import { WorkflowDefinition } from './entities/workflow-definition.entity';
+import { WorkflowHistory } from './entities/workflow-history.entity'; // [New]
+import { WorkflowInstance } from './entities/workflow-instance.entity'; // [New]
+import { WorkflowDslService } from './workflow-dsl.service';
+import { WorkflowEngineController } from './workflow-engine.controller';
 import { WorkflowEngineService } from './workflow-engine.service';
-import { WorkflowDslService } from './workflow-dsl.service'; // [New] ต้องสร้างไฟล์นี้ตามแผน Phase 6A
-import { WorkflowEngineController } from './workflow-engine.controller'; // [New] ต้องสร้างไฟล์นี้ตามแผน Phase 6A
-import { WorkflowDefinition } from './entities/workflow-definition.entity'; // [New] ต้องสร้างไฟล์นี้ตามแผน Phase 6A

@Module({
  imports: [
-    // เชื่อมต่อกับตาราง workflow_definitions
-    TypeOrmModule.forFeature([WorkflowDefinition]),
+    TypeOrmModule.forFeature([
+      WorkflowDefinition,
+      WorkflowInstance, // [New]
+      WorkflowHistory, // [New]
+    ]),
  ],
-  controllers: [WorkflowEngineController], // เพิ่ม Controller สำหรับรับ API
-  providers: [
-    WorkflowEngineService, // Service หลัก
-    WorkflowDslService, // [New] Service สำหรับ Compile/Validate DSL
-  ],
-  exports: [WorkflowEngineService], // Export ให้ module อื่นใช้เหมือนเดิม
+  controllers: [WorkflowEngineController],
+  providers: [WorkflowEngineService, WorkflowDslService],
+  exports: [WorkflowEngineService],
 })
 export class WorkflowEngineModule {}
--- a/backend/src/modules/workflow-engine/workflow-engine.service.ts
+++ b/backend/src/modules/workflow-engine/workflow-engine.service.ts
@@ -1,20 +1,29 @@
 // File: src/modules/workflow-engine/workflow-engine.service.ts

 import {
-  Injectable,
-  NotFoundException,
  BadRequestException,
+  Injectable,
  Logger,
+  NotFoundException,
 } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
-import { Repository } from 'typeorm';
+import { DataSource, Repository } from 'typeorm';
+
+// Entities
 import { WorkflowDefinition } from './entities/workflow-definition.entity';
-import { WorkflowDslService, CompiledWorkflow } from './workflow-dsl.service';
+import { WorkflowHistory } from './entities/workflow-history.entity';
+import {
+  WorkflowInstance,
+  WorkflowStatus,
+} from './entities/workflow-instance.entity';
+
+// Services & Interfaces
 import { CreateWorkflowDefinitionDto } from './dto/create-workflow-definition.dto';
 import { EvaluateWorkflowDto } from './dto/evaluate-workflow.dto';
 import { UpdateWorkflowDefinitionDto } from './dto/update-workflow-definition.dto';
+import { CompiledWorkflow, WorkflowDslService } from './workflow-dsl.service';

-// Interface สำหรับ Backward Compatibility (Logic เดิม)
+// Legacy Interface (Backward Compatibility)
 export enum WorkflowAction {
  APPROVE = 'APPROVE',
  REJECT = 'REJECT',
@@ -35,11 +44,16 @@ export class WorkflowEngineService {
  constructor(
    @InjectRepository(WorkflowDefinition)
    private readonly workflowDefRepo: Repository<WorkflowDefinition>,
+    @InjectRepository(WorkflowInstance)
+    private readonly instanceRepo: Repository<WorkflowInstance>,
+    @InjectRepository(WorkflowHistory)
+    private readonly historyRepo: Repository<WorkflowHistory>,
    private readonly dslService: WorkflowDslService,
+    private readonly dataSource: DataSource, // ใช้สำหรับ Transaction
  ) {}

  // =================================================================
-  // [NEW] DSL & Workflow Engine (Phase 6A)
+  // [PART 1] Definition Management (Phase 6A)
  // =================================================================

  /**
@@ -48,8 +62,10 @@ export class WorkflowEngineService {
  async createDefinition(
    dto: CreateWorkflowDefinitionDto,
  ): Promise<WorkflowDefinition> {
+    // 1. Compile & Validate DSL
    const compiled = this.dslService.compile(dto.dsl);

+    // 2. Check latest version
    const latest = await this.workflowDefRepo.findOne({
      where: { workflow_code: dto.workflow_code },
      order: { version: 'DESC' },
@@ -57,6 +73,7 @@ export class WorkflowEngineService {

    const nextVersion = latest ? latest.version + 1 : 1;

+    // 3. Save new version
    const entity = this.workflowDefRepo.create({
      workflow_code: dto.workflow_code,
      version: nextVersion,
@@ -65,9 +82,16 @@ export class WorkflowEngineService {
      is_active: dto.is_active ?? true,
    });

-    return this.workflowDefRepo.save(entity);
+    const saved = await this.workflowDefRepo.save(entity);
+    this.logger.log(
+      `Created Workflow Definition: ${saved.workflow_code} v${saved.version}`,
+    );
+    return saved;
  }

+  /**
+   * อัปเดต Definition (Re-compile DSL)
+   */
  async update(
    id: string,
    dto: UpdateWorkflowDefinitionDto,
@@ -95,33 +119,9 @@ export class WorkflowEngineService {
    return this.workflowDefRepo.save(definition);
  }

-  async evaluate(dto: EvaluateWorkflowDto): Promise<any> {
-    const definition = await this.workflowDefRepo.findOne({
-      where: { workflow_code: dto.workflow_code, is_active: true },
-      order: { version: 'DESC' },
-    });
-
-    if (!definition) {
-      throw new NotFoundException(
-        `No active workflow definition found for "${dto.workflow_code}"`,
-      );
-    }
-
-    const compiled: CompiledWorkflow = definition.compiled;
-    const result = this.dslService.evaluate(
-      compiled,
-      dto.current_state,
-      dto.action,
-      dto.context || {},
-    );
-
-    this.logger.log(
-      `Workflow Evaluated: ${dto.workflow_code} [${dto.current_state}] --${dto.action}--> [${result.nextState}]`,
-    );
-
-    return result;
-  }
-
+  /**
+   * ดึง Action ที่ทำได้ ณ State ปัจจุบัน
+   */
  async getAvailableActions(
    workflowCode: string,
    currentState: string,
@@ -140,25 +140,206 @@ export class WorkflowEngineService {
  }

  // =================================================================
-  // [LEGACY] Backward Compatibility for Correspondence/RFA Modules
-  // คืนค่า Logic เดิมเพื่อไม่ให้ Module อื่น Error (TS2339)
+  // [PART 2] Runtime Engine (Phase 3.1)
+  // =================================================================
+
+  /**
+   * เริ่มต้น Workflow Instance ใหม่สำหรับเอกสาร
+   */
+  async createInstance(
+    workflowCode: string,
+    entityType: string,
+    entityId: string,
+    initialContext: Record<string, any> = {},
+  ): Promise<WorkflowInstance> {
+    // 1. หา Definition ล่าสุด
+    const definition = await this.workflowDefRepo.findOne({
+      where: { workflow_code: workflowCode, is_active: true },
+      order: { version: 'DESC' },
+    });
+
+    if (!definition) {
+      throw new NotFoundException(
+        `Workflow "${workflowCode}" not found or inactive.`,
+      );
+    }
+
+    // 2. หา Initial State จาก Compiled Structure
+    const compiled: CompiledWorkflow = definition.compiled;
+    const initialState = Object.keys(compiled.states).find(
+      (key) => compiled.states[key].initial,
+    );
+
+    if (!initialState) {
+      throw new BadRequestException(
+        `Workflow "${workflowCode}" has no initial state defined.`,
+      );
+    }
+
+    // 3. สร้าง Instance
+    const instance = this.instanceRepo.create({
+      definition,
+      entityType,
+      entityId,
+      currentState: initialState,
+      status: WorkflowStatus.ACTIVE,
+      context: initialContext,
+    });
+
+    const savedInstance = await this.instanceRepo.save(instance);
+    this.logger.log(
+      `Started Workflow Instance: ${workflowCode} for ${entityType}:${entityId}`,
+    );
+    return savedInstance;
+  }
+
+  /**
+   * ดำเนินการเปลี่ยนสถานะ (Transition) ของ Instance จริงแบบ Transactional
+   */
+  async processTransition(
+    instanceId: string,
+    action: string,
+    userId: number,
+    comment?: string,
+    payload: Record<string, any> = {},
+  ) {
+    const queryRunner = this.dataSource.createQueryRunner();
+    await queryRunner.connect();
+    await queryRunner.startTransaction();
+
+    try {
+      // 1. Lock Instance เพื่อป้องกัน Race Condition (Pessimistic Write Lock)
+      const instance = await queryRunner.manager.findOne(WorkflowInstance, {
+        where: { id: instanceId },
+        relations: ['definition'],
+        lock: { mode: 'pessimistic_write' },
+      });
+
+      if (!instance) {
+        throw new NotFoundException(
+          `Workflow Instance "${instanceId}" not found.`,
+        );
+      }
+
+      if (instance.status !== WorkflowStatus.ACTIVE) {
+        throw new BadRequestException(
+          `Workflow is not active (Status: ${instance.status}).`,
+        );
+      }
+
+      // 2. Evaluate Logic ผ่าน DSL Service
+      const compiled: CompiledWorkflow = instance.definition.compiled;
+      const context = { ...instance.context, userId, ...payload }; // Merge Context
+
+      // * DSL Service จะ throw error ถ้า action ไม่ถูกต้อง หรือสิทธิ์ไม่พอ
+      const evaluation = this.dslService.evaluate(
+        compiled,
+        instance.currentState,
+        action,
+        context,
+      );
+
+      const fromState = instance.currentState;
+      const toState = evaluation.nextState;
+
+      // 3. อัปเดต Instance
+      instance.currentState = toState;
+      instance.context = context; // อัปเดต Context ด้วย
+
+      // เช็คว่าเป็น Terminal State หรือไม่?
+      if (compiled.states[toState].terminal) {
+        instance.status = WorkflowStatus.COMPLETED;
+      }
+
+      await queryRunner.manager.save(instance);
+
+      // 4. บันทึก History (Audit Trail)
+      const history = this.historyRepo.create({
+        instanceId: instance.id,
+        fromState,
+        toState,
+        action,
+        actionByUserId: userId,
+        comment,
+        metadata: {
+          events: evaluation.events,
+          payload,
+        },
+      });
+      await queryRunner.manager.save(history);
+
+      // 5. Trigger Events (Integration Point)
+      // ในอนาคตสามารถ Inject NotificationService มาเรียกตรงนี้ได้
+      if (evaluation.events && evaluation.events.length > 0) {
+        this.logger.log(
+          `Triggering ${evaluation.events.length} events for instance ${instanceId}`,
+        );
+        // await this.eventHandler.handle(evaluation.events);
+      }
+
+      await queryRunner.commitTransaction();
+
+      this.logger.log(
+        `Transition: ${instanceId} [${fromState}] --${action}--> [${toState}] by User:${userId}`,
+      );
+
+      return {
+        success: true,
+        nextState: toState,
+        events: evaluation.events,
+        isCompleted: instance.status === WorkflowStatus.COMPLETED,
+      };
+    } catch (err) {
+      await queryRunner.rollbackTransaction();
+      this.logger.error(
+        `Transition Failed for ${instanceId}: ${(err as Error).message}`,
+      );
+      throw err;
+    } finally {
+      await queryRunner.release();
+    }
+  }
+
+  /**
+   * (Utility) Evaluate แบบไม่บันทึกผล (Dry Run) สำหรับ Test หรือ Preview
+   */
+  async evaluate(dto: EvaluateWorkflowDto): Promise<any> {
+    const definition = await this.workflowDefRepo.findOne({
+      where: { workflow_code: dto.workflow_code, is_active: true },
+      order: { version: 'DESC' },
+    });
+
+    if (!definition) {
+      throw new NotFoundException(`Workflow "${dto.workflow_code}" not found`);
+    }
+
+    return this.dslService.evaluate(
+      definition.compiled,
+      dto.current_state,
+      dto.action,
+      dto.context || {},
+    );
+  }
+
+  // =================================================================
+  // [PART 3] Legacy Support (Backward Compatibility)
+  // รักษา Logic เดิมไว้เพื่อให้ Module อื่น (Correspondence/RFA) ทำงานต่อได้
  // =================================================================

  /**
   * คำนวณสถานะถัดไปแบบ Linear Sequence (Logic เดิม)
-   * ใช้สำหรับ CorrespondenceService และ RfaService ที่ยังไม่ได้ Refactor
+   * @deprecated แนะนำให้เปลี่ยนไปใช้ processTransition แทนเมื่อ Refactor เสร็จ
   */
  processAction(
    currentSequence: number,
    totalSteps: number,
-    action: string, // รับเป็น string เพื่อความยืดหยุ่น
+    action: string,
    returnToSequence?: number,
  ): TransitionResult {
-    // Map string action to enum logic
    switch (action) {
      case WorkflowAction.APPROVE:
      case WorkflowAction.ACKNOWLEDGE:
-      case 'APPROVE': // Case sensitive handling fallback
+      case 'APPROVE':
      case 'ACKNOWLEDGE':
        if (currentSequence >= totalSteps) {
          return {
@@ -193,7 +374,6 @@ export class WorkflowEngineService {
        };

      default:
-        // กรณีส่ง Action อื่นมา ให้ถือว่าเป็น Approve (หรือจะ Throw Error ก็ได้)
        this.logger.warn(
          `Unknown legacy action: ${action}, treating as next step.`,
        );
--- a/backend/tsconfig.json
+++ b/backend/tsconfig.json
@@ -22,6 +22,27 @@
    "forceConsistentCasingInFileNames": true,
    "noImplicitAny": true, // ห้ามใช้ Any โดยไม่จำเป็น
    "strictBindCallApply": true,
-    "noFallthroughCasesInSwitch": true
+    "noFallthroughCasesInSwitch": true,
+    "paths": {
+      "@backend": ["./src"],
+      "@backend/*": ["./src/*"],
+      "@modules": ["./src/modules"],
+      "@common": ["./src/common"],
+      "@config": ["./src/common/config"],
+      "@circulation": ["./src/modules/circulation"],
+      "@correspondence": ["./src/modules/correspondence"],
+      "@document-numbering": ["./src/modules/document-numbering"],
+      "@drawing": ["./src/modules/drawing"],
+      "@json-schema": ["./src/modules/json-schema"],
+      "@master": ["./src/modules/master"],
+      "@monitoring": ["./src/modules/monitoring"],
+      "@notification": ["./src/modules/notification"],
+      "@project": ["./src/modules/project"],
+      "@rfa": ["./src/modules/rfa"],
+      "@search": ["./src/modules/search"],
+      "@transmittal": ["./src/modules/transmittal"],
+      "@users": ["./src/modules/users"],
+      "@workflow-engine": ["./src/modules/workflow-engine"]
+    }
  }
 }