Converted more procedural programming to OOP

src/application/base/baseController.ts

@@ -0,0 +1,18 @@
+import { Request, Response } from 'express'
+
+export abstract class BaseController {
+  protected sendSuccess(res: Response, data?: any, message?: string, status: number = 200) {
+    return res.status(status).json({
+      success: true,
+      message,
+      data
+    })
+  }
+
+  protected sendError(res: Response, message: string, status: number = 400) {
+    return res.status(status).json({
+      success: false,
+      message
+    })
+  }
+}

src/application/base/baseEntity.ts

@@ -0,0 +1,67 @@
+import { Database } from '#application/database'
+import { appLogger } from '#application/logger'
+
+export abstract class BaseEntity {
+  async save(): Promise<this> {
+    try {
+      const orm = await Database.getInstance()
+      const em = orm.em.fork()
+
+      await em.begin()
+      try {
+        em.persist(this)
+        await em.flush()
+        await em.commit()
+        return this
+      } catch (error) {
+        await em.rollback()
+        throw error
+      }
+    } catch (error) {
+      appLogger.error(`Failed to save entity: ${error instanceof Error ? error.message : String(error)}`)
+      throw error
+    }
+  }
+
+  async update(): Promise<this> {
+    try {
+      const orm = await Database.getInstance()
+      const em = orm.em.fork()
+
+      await em.begin()
+      try {
+        em.merge(this)
+        await em.flush()
+        await em.commit()
+        return this
+      } catch (error) {
+        await em.rollback()
+        throw error
+      }
+    } catch (error) {
+      appLogger.error(`Failed to update entity: ${error instanceof Error ? error.message : String(error)}`)
+      throw error
+    }
+  }
+
+  async delete(): Promise<this> {
+    try {
+      const orm = await Database.getInstance()
+      const em = orm.em.fork()
+
+      await em.begin()
+      try {
+        em.remove(this)
+        await em.flush()
+        await em.commit()
+        return this
+      } catch (error) {
+        await em.rollback()
+        throw error
+      }
+    } catch (error) {
+      appLogger.error(`Failed to remove entity: ${error instanceof Error ? error.message : String(error)}`)
+      throw error
+    }
+  }
+}

src/application/base/baseRepository.ts

@@ -0,0 +1,24 @@
+import { appLogger } from '../logger'
+import { Database } from '../database'
+import { EntityManager, MikroORM } from '@mikro-orm/core'
+
+export abstract class BaseRepository {
+  protected orm!: MikroORM
+  protected em!: EntityManager
+
+  constructor() {
+    this.initializeORM().catch((error) => {
+      appLogger.error(`Failed to initialize Repository: ${error instanceof Error ? error.message : String(error)}`)
+    })
+  }
+
+  private async initializeORM() {
+    try {
+      this.orm = await Database.getInstance()
+      this.em = this.orm.em.fork()
+    } catch (error: any) {
+      appLogger.error(`Failed to initialize ORM: ${error instanceof Error ? error.message : String(error)}`)
+      throw error
+    }
+  }
+}