refactor: remove comments and improve printer service

API_CONTRACTS.md

@@ -0,0 +1,109 @@
+# Documentação da API de Impressão
+
+Esta API permite listar impressoras disponíveis no servidor (Windows) e enviar comandos de impressão de texto simples ou layouts HTML (etiquetas).
+
+URL Base: `http://localhost:3000`
+Swagger UI: `http://localhost:3000/api`
+
+## Endpoints
+
+### 1. Listar Impressoras
+
+Retorna a lista de impressoras instaladas no servidor onde a API está rodando.
+
+- **Método:** `GET`
+- **Rota:** `/printer/list`
+- **Exemplo de Resposta:**
+
+```json
+[
+  {
+    "name": "POS-80",
+    "portName": "USB001",
+    "driverName": "Generic / Text Only",
+    "printerStatus": 0,
+    "deviceId": "POS-80"
+  },
+  {
+    "name": "Microsoft Print to PDF",
+    "portName": "PORTPROMPT:",
+    "driverName": "Microsoft Print To PDF",
+    "printerStatus": 0
+  }
+]
+```
+
+---
+
+### 2. Imprimir HTML (Etiquetas/Layouts)
+
+Converte um código HTML (com suporte a Tailwind CSS) para PDF e imprime na impressora selecionada. Ideal para etiquetas.
+
+- **Método:** `POST`
+- **Rota:** `/printer/print-html`
+- **Corpo da Requisição (JSON):**
+
+```json
+{
+  "html": "<div class='text-xl font-bold'>Minha Etiqueta</div>...",
+  "printerName": "POS-80", // Nome exato da impressora (conforme retornado na listagem)
+  "width": "60mm", // Opcional. Largura do papel/etiqueta. Default: 80mm
+  "height": "40mm" // Opcional. Altura da etiqueta. Default: auto
+}
+```
+
+- **Detalhes:**
+  - O backend injeta automaticamente o script do Tailwind CSS.
+  - O HTML é renderizado via Puppeteer (Chrome headless).
+
+---
+
+### 3. Imprimir Texto Simples (ESC/POS)
+
+Envia comandos de texto diretamente para a impressora. Ideal para cupons simples e rápidos, sem formatação complexa.
+
+- **Método:** `POST`
+- **Rota:** `/printer/print`
+- **Corpo da Requisição (JSON):**
+
+```json
+{
+  "lines": [
+    "--------------------------------",
+    "       CUPOM FISCAL       ",
+    "--------------------------------",
+    "Item 1 ................. R$ 10,00"
+  ],
+  "alignment": "center", // "left", "center", "right". Default: left
+  "upsideDown": false, // Se true, imprime de cabeça para baixo
+  "printerInterface": "POS-80" // Pode ser nome da impressora (USB) ou "tcp://192.168.1.100" (Rede)
+}
+```
+
+## Tipos (TypeScript Interfaces)
+
+Se estiver usando TypeScript no Frontend, utilize estas interfaces:
+
+```typescript
+export interface Printer {
+  name: string;
+  portName?: string;
+  driverName?: string;
+  printerStatus?: number;
+  deviceId?: string;
+}
+
+export interface PrintHtmlPayload {
+  html: string;
+  printerName: string;
+  width?: string;
+  height?: string;
+}
+
+export interface PrintTextPayload {
+  lines: string[];
+  alignment?: 'left' | 'center' | 'right';
+  upsideDown?: boolean;
+  printerInterface?: string;
+}
+```

nest-cli.json

@@ -3,6 +3,7 @@
   "collection": "@nestjs/schematics",
   "sourceRoot": "src",
   "compilerOptions": {
-    "deleteOutDir": true
+    "deleteOutDir": true,
+    "plugins": ["@nestjs/swagger"]
   }
 }

package.json

@@ -26,17 +26,20 @@
     "@nestjs/common": "^11.0.17",
     "@nestjs/core": "^11.0.1",
     "@nestjs/platform-express": "^11.0.1",
+    "@nestjs/swagger": "^11.2.5",
     "@nestjs/typeorm": "^11.0.0",
     "@types/multer": "^2.0.0",
     "multer": "^2.0.2",
     "node-printer": "^1.0.4",
+    "node-thermal-printer": "^4.5.0",
     "oracledb": "^6.10.0",
     "pdf-to-printer": "^5.6.1",
-    "printer": "^0.4.0",
     "puppeteer": "^24.35.0",
     "reflect-metadata": "^0.2.2",
     "rxjs": "^7.8.1",
-    "typeorm": "^0.3.28"
+    "swagger-ui-express": "^5.0.1",
+    "typeorm": "^0.3.28",
+    "unix-print": "^1.3.2"
   },
   "devDependencies": {
     "@eslint/eslintrc": "^3.2.0",

src/app.module.ts

@@ -1,10 +1,10 @@
 import { Module } from '@nestjs/common';
 import { AppController } from './app.controller';
 import { AppService } from './app.service';
-import { ListPrinterController } from './controller/list-printer.controller';
-import { ListPrinterService } from './services/list-printer';
 import { TypeOrmModule } from '@nestjs/typeorm';
 import { typeOrmConfig } from './config/typeorm.config';
+import { ListPrinterController } from './controller/list-printer.controller';
+import { ListPrinterService } from './services/create-printer';
 
 @Module({
   imports: [TypeOrmModule.forRoot(typeOrmConfig)],

src/controller/list-printer.controller.ts

@@ -1,17 +1,62 @@
-import { Controller, Get, Post, Body } from '@nestjs/common';
+import { Controller, Post, Body, Get, HttpCode, HttpStatus, Param } from '@nestjs/common';
-import { ListPrinterService } from '../services/list-printer';
+import { ApiTags, ApiOperation, ApiResponse } from '@nestjs/swagger';
+import { ListPrinterService } from '../services/create-printer';
+import { PrintDataDto } from '../dto/print-data.dto';
+import { PrintHtmlDto } from '../dto/print-html.dto';
+import { PrinterDto } from '../dto/printer.dto';
+import { getPrinters } from '../services/get-printer';
 
-@Controller('printers')
+@ApiTags('Printer')
+@Controller('printer')
 export class ListPrinterController {
-  constructor(private readonly listPrinterService: ListPrinterService) {}
+  constructor(private readonly printerService: ListPrinterService) {}
 
-  @Get()
+  @Post(':printerName/print')
-  async getPrinters() {
+  @HttpCode(HttpStatus.OK)
-    return this.listPrinterService.listPrinters();
+  @ApiOperation({ summary: 'Envia um comando de impressão de texto simples (ESC/POS)' })
+  @ApiResponse({ status: 200, description: 'Impressão enviada com sucesso' })
+  async print(
+    @Param('printerName') printerName: string,
+    @Body() printData: PrintDataDto
+  ) {
+    printData.printerInterface = printerName;
+    return this.printerService.printReceipt(printData);
   }
 
   @Post('print')
-  async print(@Body() body: { printerName: string; filePath: string }) {
+  @HttpCode(HttpStatus.OK)
-    return this.listPrinterService.printDocument(body.printerName, body.filePath);
+  @ApiOperation({ summary: 'Envia um comando de impressão (Compatibilidade)' })
+  async printLegacy(@Body() printData: PrintDataDto) {
+    return this.printerService.printReceipt(printData);
+  }
+
+  @Post(':printerName/print-html')
+  @HttpCode(HttpStatus.OK)
+  @ApiOperation({ summary: 'Converte HTML para PDF e imprime na impressora especificada na URL' })
+  @ApiResponse({ status: 200, description: 'HTML enviado para impressão' })
+  async printHtml(
+    @Param('printerName') printerName: string,
+    @Body() printHtmlDto: PrintHtmlDto
+  ) {
+    printHtmlDto.printerName = printerName;
+    return this.printerService.printHtml(printHtmlDto);
+  }
+
+  @Post('print-html')
+  @HttpCode(HttpStatus.OK)
+  @ApiOperation({ summary: 'Converte HTML para PDF (Compatibilidade)' })
+  async printHtmlLegacy(@Body() printHtmlDto: PrintHtmlDto) {
+    return this.printerService.printHtml(printHtmlDto);
+  }
+
+  @Get('list')
+  @ApiOperation({ summary: 'Lista impressoras disponíveis no sistema' })
+  @ApiResponse({ 
+    status: 200, 
+    description: 'Lista de impressoras encontradas',
+    type: [PrinterDto] 
+  })
+  async listPrinters() {
+    return getPrinters();
   }
 }

src/dto/print-data.dto.ts

@@ -0,0 +1,31 @@
+import { ApiProperty } from '@nestjs/swagger';
+
+export class PrintDataDto {
+  @ApiProperty({ 
+    example: ['--------------------------------', '       TESTE DE IMPRESSAO       ', '--------------------------------'], 
+    description: 'Lista de linhas de texto para imprimir' 
+  })
+  lines: string[];
+
+  @ApiProperty({ 
+    required: false, 
+    enum: ['left', 'center', 'right'],
+    example: 'center',
+    description: 'Alinhamento do texto'
+  })
+  alignment?: 'left' | 'center' | 'right';
+
+  @ApiProperty({ 
+    required: false, 
+    example: false,
+    description: 'Se verdadeiro, imprime de cabeça para baixo (se suportado)'
+  })
+  upsideDown?: boolean;
+
+  @ApiProperty({
+    required: false,
+    example: 'tcp://10.1.119.13',
+    description: 'Interface da impressora. Ex: tcp://ip:porta ou printer:NomeDaImpressora'
+  })
+  printerInterface?: string;
+}

src/dto/print-html.dto.ts

@@ -0,0 +1,21 @@
+import { ApiProperty } from '@nestjs/swagger';
+
+export class PrintHtmlDto {
+  @ApiProperty({ 
+    example: '<h1>Titulo</h1><p>Conteudo do pedido...</p>', 
+    description: 'Conteúdo HTML para impressão' 
+  })
+  html: string;
+
+  @ApiProperty({ 
+    example: 'POS-80', 
+    description: 'Nome da impressora onde será impresso o PDF gerado' 
+  })
+  printerName: string;
+
+  @ApiProperty({ example: '60mm', required: false, description: 'Largura da etiqueta (default: 80mm)' })
+  width?: string;
+
+  @ApiProperty({ example: '40mm', required: false, description: 'Altura da etiqueta (default: auto)' })
+  height?: string;
+}

src/dto/printer.dto.ts

@@ -0,0 +1,18 @@
+import { ApiProperty } from '@nestjs/swagger';
+
+export class PrinterDto {
+  @ApiProperty({ example: 'POS-80', description: 'Nome da impressora' })
+  name: string;
+
+  @ApiProperty({ example: 'USB001', description: 'Porta da impressora (Win32)' })
+  portName?: string;
+
+  @ApiProperty({ example: 'Generic / Text Only', description: 'Nome do driver' })
+  driverName?: string;
+
+  @ApiProperty({ example: 0, description: 'Status da impressora (0 = Idle)' })
+  printerStatus?: number;
+
+  @ApiProperty({ example: 'POS-80', description: 'ID do dispositivo (usado para impressão)' })
+  deviceId?: string;
+}

src/interface/printData.ts

@@ -0,0 +1,5 @@
+export interface PrintData {
+  lines: string[];
+  alignment?: 'left' | 'center' | 'right';
+  upsideDown?: boolean;
+}

src/main.ts

@@ -1,10 +1,20 @@
 import { NestFactory } from '@nestjs/core';
+import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
 import { AppModule } from './app.module';
 import { initializeOracleClient } from './helpers/oracle.helper';
 
 async function bootstrap() {
   initializeOracleClient();
   const app = await NestFactory.create(AppModule);
+
+  const config = new DocumentBuilder()
+    .setTitle('API Documentation')
+    .setDescription('The API description')
+    .setVersion('1.0')
+    .build();
+  const document = SwaggerModule.createDocument(app, config);
+  SwaggerModule.setup('api', app, document);
+
   await app.listen(3000);
 }
 bootstrap();

src/services/create-printer.ts

@@ -0,0 +1,143 @@
+import { Injectable } from '@nestjs/common';
+import { PrintDataDto } from '../dto/print-data.dto';
+import { PrintHtmlDto } from '../dto/print-html.dto';
+const { ThermalPrinter, PrinterTypes } = require('node-thermal-printer');
+
+@Injectable()
+export class ListPrinterService {
+  private readonly printerType = PrinterTypes.EPSON;
+
+  async printReceipt(data: PrintDataDto): Promise<{ success: boolean; message: string }> {
+    if (!data.lines?.length) {
+      return { success: false, message: 'No lines provided' };
+    }
+
+    try {
+      let printerInterface = data.printerInterface;
+
+      if (printerInterface && !printerInterface.includes('://') && !printerInterface.startsWith('printer:')) {
+        printerInterface = `printer:${printerInterface}`;
+      }
+
+      const printer = new ThermalPrinter({
+        type: this.printerType,
+        interface: printerInterface,
+      });
+
+      this.applyAlignment(printer, data.alignment);
+
+      for (const line of data.lines) {
+        if (data.upsideDown) {
+          printer.upsideDown(true);
+        }
+        printer.println(line);
+        if (data.upsideDown) {
+          printer.upsideDown(false);
+        }
+      }
+
+      printer.drawLine();
+      printer.cut();
+      printer.beep();
+
+      await printer.execute();
+      
+      return { success: true, message: 'Print successful!' };
+    } catch (error) {
+      return { 
+        success: false, 
+        message: `Print failed: ${error.message || error}` 
+      };
+    }
+  }
+
+  private applyAlignment(printer: any, alignment?: string): void {
+    if (alignment === 'center') {
+      return printer.alignCenter();
+    }
+    
+    if (alignment === 'right') {
+      return printer.alignRight();
+    }
+
+    return printer.alignLeft();
+  }
+
+  async printHtml(data: PrintHtmlDto): Promise<{ success: boolean; message: string }> {
+    const puppeteer = require('puppeteer');
+    const pdfPrinter = require('pdf-to-printer');
+    const path = require('path');
+    const fs = require('fs');
+    const os = require('os');
+    
+    const tempFilePath = path.join(os.tmpdir(), `print-${Date.now()}.pdf`);
+
+    try {
+      const browser = await puppeteer.launch({ headless: true });
+      const page = await browser.newPage();
+      
+      const width = data.width || '80mm';
+      const height = data.height;
+
+      const fullHtml = `
+        <!DOCTYPE html>
+        <html>
+          <head>
+            <meta charset="UTF-8">
+            <script src="https://cdn.tailwindcss.com"></script>
+            <style>
+              html, body { 
+                margin: 0; 
+                padding: 0; 
+                -webkit-print-color-adjust: exact; 
+                width: 100%;
+                height: 100%;
+              }
+              
+              body {
+                transform-origin: top left;
+                zoom: 1.25; 
+              }
+              @page { size: ${width} ${height || 'auto'}; margin: 0; }
+            </style>
+          </head>
+          <body>
+            ${data.html}
+          </body>
+        </html>
+      `;
+
+      await page.setContent(fullHtml, { waitUntil: 'networkidle0' });
+      
+      const pdfOptions: any = { 
+        path: tempFilePath, 
+        printBackground: true,
+        width: width,
+        margin: { top: '0px', right: '0px', bottom: '0px', left: '0px' }
+      };
+
+      if (height) {
+        pdfOptions.height = height;
+      }
+
+      await page.pdf(pdfOptions);
+
+      await browser.close();
+
+      await pdfPrinter.print(tempFilePath, { printer: data.printerName });
+      
+      return { success: true, message: 'HTML convertido (com Tailwind) e enviado para impressão!' };
+    } catch (error) {
+      console.error('Erro na impressão HTML:', error);
+      return { success: false, message: `Erro ao imprimir HTML: ${error.message}` };
+    } finally {
+      try {
+        if (fs.existsSync(tempFilePath)) {
+          fs.unlinkSync(tempFilePath);
+        }
+      } catch (e) {
+        console.warn('Não foi possível deletar arquivo temp:', e);
+      }
+    }
+  }
+}

src/services/get-printer.ts

@@ -0,0 +1,17 @@
+import { exec } from 'child_process';
+import { promisify } from 'util';
+
+const execAsync = promisify(exec);
+
+export const getPrinters = async () => {
+  try {
+    const command = `powershell "Get-Printer | Select-Object Name, DriverName, PrinterStatus | ConvertTo-Json"`;
+    const { stdout } = await execAsync(command);
+    if (!stdout) return [];
+    const data = JSON.parse(stdout);
+    return Array.isArray(data) ? data : [data];
+  } catch (error) {
+    console.error("Erro ao listar impressoras via PowerShell:", error);
+    return [];
+  }
+};

src/services/list-printer.ts

@@ -1,37 +0,0 @@
-import { Injectable } from '@nestjs/common';
-import { exec } from 'child_process';
-import { promisify } from 'util';
-import { print } from 'pdf-to-printer';
-
-
-const execAsync = promisify(exec);
-
-@Injectable()
-export class ListPrinterService {
-  async listPrinters(): Promise<string[]> {
-    try {
-      const { stdout } = await execAsync(
-        'powershell -Command "Get-Printer | Select-Object -ExpandProperty Name"',
-        { encoding: 'utf-8' }
-      );
-      
-      const printers = stdout
-        .split('\r\n')
-        .map(line => line.trim())
-        .filter(line => line && line !== 'Name');
-      
-      return printers;
-    } catch (error) {
-      throw new Error(`Failed to list printers: ${(error as Error).message}`);
-    }
-  }
-
-  async printDocument(printerName: string, filePath: string): Promise<{ success: boolean; message: string }> {
-    try {
-      await print(filePath, { printer: printerName });
-      return { success: true, message: `Document sent to printer: ${printerName}` };
-    } catch (error) {
-      throw new Error(`Failed to print document: ${(error as Error).message}`);
-    }
-  }
-}