feat(db): integrate PostgreSQL into factory, config, and TypeORM data source

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/main/services/config/config-manager.ts

@@ -28,6 +28,7 @@ import {
   type DatabaseType,
   type MySqlConfig,
   type SqlServerConfig,
+  type PostgreSqlConfig,
   type LoggingConfig
 } from '../../types/config.schema'
 
@@ -66,6 +67,14 @@ const DEFAULT_CONFIG: FullConfig = {
       password: '',
       driver: 'ODBC Driver 18 for SQL Server',
       trustServerCertificate: true
+    },
+    postgresql: {
+      host: 'localhost',
+      port: 5432,
+      database: 'erp_db',
+      username: 'postgres',
+      password: '',
+      maxPoolSize: 10
     }
   },
   paths: {
@@ -299,13 +308,17 @@ export class ConfigManager {
   /**
    * 获取当前激活的数据库配置
    */
-  public getActiveDatabaseConfig(): MySqlConfig | SqlServerConfig {
+  public getActiveDatabaseConfig(): MySqlConfig | SqlServerConfig | PostgreSqlConfig {
     if (!this.config) {
       throw new Error('Configuration not initialized')
     }
 
-    const { activeType, mysql, sqlserver } = this.config.database
-    return activeType === 'mysql' ? mysql : sqlserver
+    const { activeType, mysql, sqlserver, postgresql } = this.config.database
+    switch (activeType) {
+      case 'postgresql': return postgresql
+      case 'sqlserver': return sqlserver
+      default: return mysql
+    }
   }
 
   /**

src/main/services/database/data-source.ts

@@ -2,7 +2,7 @@
  * TypeORM Data Source Configuration
  *
  * Provides a centralized database connection for TypeORM entities.
- * Supports both MySQL and SQL Server based on configuration.
+ * Supports MySQL, SQL Server, and PostgreSQL based on configuration.
  *
  * Note: Configuration is now loaded from config.yaml via ConfigManager,
  * not from environment variables.
@@ -18,10 +18,14 @@ const log = createLogger('DataSource')
 /**
  * Get database type from config manager
  */
-function getDatabaseType(): 'mysql' | 'mssql' {
+function getDatabaseType(): 'mysql' | 'mssql' | 'postgres' {
   const configManager = ConfigManager.getInstance()
   const dbType = configManager.getDatabaseType()
-  return dbType === 'sqlserver' ? 'mssql' : 'mysql'
+  switch (dbType) {
+    case 'sqlserver': return 'mssql'
+    case 'postgresql': return 'postgres'
+    default: return 'mysql'
+  }
 }
 
 /**
@@ -54,6 +58,17 @@ function buildDataSourceOptions(): DataSourceOptions {
       },
       ...commonOptions
     } as DataSourceOptions
+  } else if (type === 'postgres') {
+    const dbConfig = config.database.postgresql
+    return {
+      type: 'postgres',
+      host: dbConfig.host,
+      port: dbConfig.port,
+      username: dbConfig.username,
+      password: dbConfig.password,
+      database: dbConfig.database,
+      ...commonOptions
+    } as DataSourceOptions
   }
 
   const dbConfig = config.database.mysql

src/main/services/database/index.ts

@@ -2,17 +2,19 @@
  * Database Factory
  *
  * Creates and manages database service instances based on configuration.
- * Supports both MySQL and SQL Server databases.
+ * Supports MySQL, SQL Server, and PostgreSQL databases.
  */
 
 import { ConfigManager } from '../config/config-manager'
 import { MySqlService } from './mysql'
 import { SqlServerService } from './sql-server'
+import { PostgreSqlService } from './postgresql'
 import type {
   IDatabaseService,
   DatabaseType,
   MySqlConfig,
-  SqlServerConfig
+  SqlServerConfig,
+  PostgreSqlConfig
 } from '../../types/database.types'
 import { createLogger } from '../logger'
 
@@ -65,6 +67,22 @@ export function createSqlServerConfig(): SqlServerConfig {
   }
 }
 
+/**
+ * Create PostgreSQL configuration from config manager
+ */
+export function createPostgreSqlConfig(): PostgreSqlConfig {
+  const configManager = ConfigManager.getInstance()
+  const dbConfig = configManager.getConfig().database.postgresql
+  return {
+    host: dbConfig.host,
+    port: dbConfig.port,
+    user: dbConfig.username,
+    password: dbConfig.password,
+    database: dbConfig.database,
+    maxPoolSize: dbConfig.maxPoolSize
+  }
+}
+
 /**
  * Create a database service instance
  *
@@ -86,7 +104,10 @@ export async function create(type?: DatabaseType): Promise<IDatabaseService> {
   // Create new instance
   let service: IDatabaseService
 
-  if (dbType === 'sqlserver') {
+  if (dbType === 'postgresql') {
+    log.info('Creating PostgreSQL database service')
+    service = new PostgreSqlService(createPostgreSqlConfig())
+  } else if (dbType === 'sqlserver') {
     log.info('Creating SQL Server database service')
     service = new SqlServerService(createSqlServerConfig())
   } else {
@@ -175,10 +196,12 @@ export function isConnected(type?: DatabaseType): boolean {
 // Re-export types and services
 export { MySqlService } from './mysql'
 export { SqlServerService } from './sql-server'
+export { PostgreSqlService } from './postgresql'
 export type {
   IDatabaseService,
   DatabaseType,
   QueryResult,
   MySqlConfig,
-  SqlServerConfig
+  SqlServerConfig,
+  PostgreSqlConfig
 } from '../../types/database.types'