pdf: add new feature

Signed-off-by: Rodrigo Bertoldo de Sousa Martins <rodrigo.sousa.577@gmail.com>

src/App.tsx

@@ -50,6 +50,9 @@ import { DetalhesCalculo } from './components/calculos/DetalhesCalculo';
 import { NovoPensaoAlimenticia } from './components/calculos/NovoPensaoAlimenticia';
 import { DetalhePensaoAlimenticia } from './components/calculos/DetalhePensaoAlimenticia';
 
+// Importar componente de manipulação de PDF
+import { PDFManipulationPage } from './components/pdf/PDFManipulationPage';
+
 const queryClient = new QueryClient();
 
 const router = createBrowserRouter(
@@ -126,6 +129,13 @@ const router = createBrowserRouter(
               <DetalhePensaoAlimenticia />
             </ProtectedRoute>
           } />
+          
+          {/* Rota para Manipulação de PDF */}
+          <Route path="/pdf" element={
+            <ProtectedRoute>
+              <PDFManipulationPage />
+            </ProtectedRoute>
+          } />
         </Route>
       </Route>
       <Route path="*" element={<Navigate to="/login" />} />

src/components/pdf/PDFManipulationPage.tsx

@@ -0,0 +1,658 @@
+import React, { useState, useCallback } from 'react';
+import { useDropzone } from 'react-dropzone';
+import axios from 'axios';
+import { toast } from 'react-toastify';
+import {
+  DocumentIcon,
+  CloudArrowUpIcon,
+  ArrowsPointingInIcon,
+  ScissorsIcon,
+  ArrowsUpDownIcon,
+  PhotoIcon,
+  DocumentTextIcon,
+  InformationCircleIcon,
+  ArrowDownTrayIcon,
+  ClockIcon,
+} from '@heroicons/react/24/outline';
+
+interface OperationResult {
+  operacaoId: string;
+  outputPaths?: string[];
+  outputPath?: string;
+  processingTime?: number;
+  reduction?: number;
+  filesCreated?: number;
+  text?: string;
+  confidence?: number;
+}
+
+type OperationType =
+  | 'compress'
+  | 'split'
+  | 'merge'
+  | 'pdfToImages'
+  | 'imagesToPDF'
+  | 'ocr'
+  | 'info';
+
+export const PDFManipulationPage: React.FC = () => {
+  const [selectedOperation, setSelectedOperation] = useState<OperationType>('compress');
+  const [files, setFiles] = useState<File[]>([]);
+  const [processing, setProcessing] = useState(false);
+  const [result, setResult] = useState<OperationResult | null>(null);
+  const [history, setHistory] = useState<any[]>([]);
+
+  // Configurações para cada operação
+  const [compressQuality, setCompressQuality] = useState(95);
+  const [splitType, setSplitType] = useState<'pages' | 'range' | 'chunks'>('pages');
+  const [splitPages, setSplitPages] = useState<string>('1,2,3');
+  const [splitRanges, setSplitRanges] = useState<string>('1-5,6-10');
+  const [chunkSize, setChunkSize] = useState(5);
+  const [imageFormat, setImageFormat] = useState<'png' | 'jpg' | 'webp'>('png');
+  const [imageQuality, setImageQuality] = useState(95);
+  const [imageDensity, setImageDensity] = useState(300);
+  const [ocrLanguage, setOcrLanguage] = useState('por');
+
+  const onDrop = useCallback((acceptedFiles: File[]) => {
+    setFiles((prev) => [...prev, ...acceptedFiles]);
+  }, []);
+
+  const { getRootProps, getInputProps, isDragActive } = useDropzone({
+    onDrop,
+    accept: {
+      'application/pdf': ['.pdf'],
+      'image/*': ['.png', '.jpg', '.jpeg', '.webp'],
+    },
+  });
+
+  const removeFile = (index: number) => {
+    setFiles((prev) => prev.filter((_, i) => i !== index));
+  };
+
+  const clearFiles = () => {
+    setFiles([]);
+    setResult(null);
+  };
+
+  const getToken = () => {
+    return localStorage.getItem('token');
+  };
+
+  const processFiles = async () => {
+    if (files.length === 0) {
+      toast.error('Selecione pelo menos um arquivo');
+      return;
+    }
+
+    setProcessing(true);
+    setResult(null);
+
+    try {
+      const formData = new FormData();
+      files.forEach((file) => {
+        formData.append('files', file);
+      });
+
+      const token = getToken();
+      const config = {
+        headers: {
+          'Content-Type': 'multipart/form-data',
+          Authorization: `Bearer ${token}`,
+        },
+      };
+
+      let response;
+
+      switch (selectedOperation) {
+        case 'compress':
+          formData.append('quality', compressQuality.toString());
+          response = await axios.post('/api/pdf/compress', formData, config);
+          toast.success('PDFs comprimidos com sucesso!');
+          break;
+
+        case 'split':
+          formData.append('splitType', splitType);
+          if (splitType === 'pages') {
+            const pages = splitPages.split(',').map((p) => parseInt(p.trim()));
+            formData.append('pages', JSON.stringify(pages));
+          } else if (splitType === 'range') {
+            const ranges = splitRanges.split(',').map((r) => {
+              const [start, end] = r.trim().split('-').map(Number);
+              return { start, end };
+            });
+            formData.append('ranges', JSON.stringify(ranges));
+          } else {
+            formData.append('chunkSize', chunkSize.toString());
+          }
+          response = await axios.post('/api/pdf/split', formData, config);
+          toast.success('PDF dividido com sucesso!');
+          break;
+
+        case 'merge':
+          response = await axios.post('/api/pdf/merge', formData, config);
+          toast.success('PDFs mesclados com sucesso!');
+          break;
+
+        case 'pdfToImages':
+          formData.append('format', imageFormat);
+          formData.append('quality', imageQuality.toString());
+          formData.append('density', imageDensity.toString());
+          response = await axios.post('/api/pdf/pdf-to-images', formData, config);
+          toast.success('PDF convertido em imagens!');
+          break;
+
+        case 'imagesToPDF':
+          formData.append('fitToPage', 'true');
+          response = await axios.post('/api/pdf/images-to-pdf', formData, config);
+          toast.success('Imagens convertidas em PDF!');
+          break;
+
+        case 'ocr':
+          formData.append('language', ocrLanguage);
+          response = await axios.post('/api/pdf/ocr', formData, config);
+          toast.success('OCR realizado com sucesso!');
+          break;
+
+        case 'info':
+          response = await axios.post('/api/pdf/info', formData, config);
+          break;
+      }
+
+      setResult(response.data);
+      loadHistory();
+    } catch (error: any) {
+      console.error('Erro ao processar arquivos:', error);
+      toast.error(error.response?.data?.message || 'Erro ao processar arquivos');
+    } finally {
+      setProcessing(false);
+    }
+  };
+
+  const loadHistory = async () => {
+    try {
+      const token = getToken();
+      const response = await axios.get('/api/pdf/history', {
+        headers: { Authorization: `Bearer ${token}` },
+      });
+      setHistory(response.data.operacoes || []);
+    } catch (error) {
+      console.error('Erro ao carregar histórico:', error);
+    }
+  };
+
+  const downloadFile = async (operacaoId: string, fileIndex: number) => {
+    try {
+      const token = getToken();
+      const response = await axios.get(`/api/pdf/download/${operacaoId}/${fileIndex}`, {
+        headers: { Authorization: `Bearer ${token}` },
+        responseType: 'blob',
+      });
+
+      const url = window.URL.createObjectURL(new Blob([response.data]));
+      const link = document.createElement('a');
+      link.href = url;
+      link.setAttribute('download', `arquivo-${fileIndex}.pdf`);
+      document.body.appendChild(link);
+      link.click();
+      link.remove();
+
+      toast.success('Download iniciado!');
+    } catch (error) {
+      console.error('Erro ao fazer download:', error);
+      toast.error('Erro ao fazer download');
+    }
+  };
+
+  React.useEffect(() => {
+    loadHistory();
+  }, []);
+
+  const operations = [
+    {
+      id: 'compress' as OperationType,
+      name: 'Comprimir PDF',
+      icon: ArrowsPointingInIcon,
+      description: 'Reduza o tamanho mantendo a qualidade',
+    },
+    {
+      id: 'split' as OperationType,
+      name: 'Dividir PDF',
+      icon: ScissorsIcon,
+      description: 'Separe páginas específicas',
+    },
+    {
+      id: 'merge' as OperationType,
+      name: 'Mesclar PDFs',
+      icon: ArrowsUpDownIcon,
+      description: 'Combine múltiplos PDFs',
+    },
+    {
+      id: 'pdfToImages' as OperationType,
+      name: 'PDF para Imagens',
+      icon: PhotoIcon,
+      description: 'Converta páginas em imagens',
+    },
+    {
+      id: 'imagesToPDF' as OperationType,
+      name: 'Imagens para PDF',
+      icon: DocumentIcon,
+      description: 'Crie PDF a partir de imagens',
+    },
+    {
+      id: 'ocr' as OperationType,
+      name: 'OCR',
+      icon: DocumentTextIcon,
+      description: 'Extraia texto de PDFs',
+    },
+    {
+      id: 'info' as OperationType,
+      name: 'Informações',
+      icon: InformationCircleIcon,
+      description: 'Obtenha detalhes do PDF',
+    },
+  ];
+
+  const formatBytes = (bytes: number) => {
+    if (bytes === 0) return '0 Bytes';
+    const k = 1024;
+    const sizes = ['Bytes', 'KB', 'MB', 'GB'];
+    const i = Math.floor(Math.log(bytes) / Math.log(k));
+    return Math.round((bytes / Math.pow(k, i)) * 100) / 100 + ' ' + sizes[i];
+  };
+
+  return (
+    <div className="min-h-screen bg-gray-50 py-8">
+      <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
+        <div className="mb-8">
+          <h1 className="text-3xl font-bold text-gray-900">Manipulação de PDFs</h1>
+          <p className="mt-2 text-gray-600">
+            Ferramentas completas para trabalhar com arquivos PDF
+          </p>
+        </div>
+
+        {/* Seleção de operação */}
+        <div className="grid grid-cols-2 md:grid-cols-4 lg:grid-cols-7 gap-4 mb-8">
+          {operations.map((op) => (
+            <button
+              key={op.id}
+              onClick={() => {
+                setSelectedOperation(op.id);
+                clearFiles();
+              }}
+              className={`p-4 rounded-lg border-2 transition-all ${
+                selectedOperation === op.id
+                  ? 'border-blue-500 bg-blue-50 text-blue-700'
+                  : 'border-gray-200 bg-white hover:border-gray-300'
+              }`}
+            >
+              <op.icon className="h-8 w-8 mx-auto mb-2" />
+              <div className="text-sm font-medium">{op.name}</div>
+            </button>
+          ))}
+        </div>
+
+        <div className="grid grid-cols-1 lg:grid-cols-3 gap-8">
+          {/* Área principal */}
+          <div className="lg:col-span-2 space-y-6">
+            {/* Upload de arquivos */}
+            <div className="bg-white rounded-lg shadow p-6">
+              <h2 className="text-xl font-semibold mb-4">Arquivos</h2>
+
+              <div
+                {...getRootProps()}
+                className={`border-2 border-dashed rounded-lg p-12 text-center cursor-pointer transition-colors ${
+                  isDragActive
+                    ? 'border-blue-500 bg-blue-50'
+                    : 'border-gray-300 hover:border-gray-400'
+                }`}
+              >
+                <input {...getInputProps()} />
+                <CloudArrowUpIcon className="h-12 w-12 mx-auto text-gray-400 mb-4" />
+                {isDragActive ? (
+                  <p className="text-blue-600">Solte os arquivos aqui...</p>
+                ) : (
+                  <div>
+                    <p className="text-gray-600 mb-2">
+                      Arraste e solte arquivos aqui, ou clique para selecionar
+                    </p>
+                    <p className="text-sm text-gray-500">
+                      PDFs e imagens (PNG, JPG, WEBP)
+                    </p>
+                  </div>
+                )}
+              </div>
+
+              {/* Lista de arquivos */}
+              {files.length > 0 && (
+                <div className="mt-4">
+                  <div className="flex justify-between items-center mb-2">
+                    <h3 className="font-medium">
+                      Arquivos selecionados ({files.length})
+                    </h3>
+                    <button
+                      onClick={clearFiles}
+                      className="text-sm text-red-600 hover:text-red-700"
+                    >
+                      Limpar todos
+                    </button>
+                  </div>
+                  <div className="space-y-2">
+                    {files.map((file, index) => (
+                      <div
+                        key={index}
+                        className="flex items-center justify-between p-3 bg-gray-50 rounded"
+                      >
+                        <div className="flex items-center space-x-3">
+                          <DocumentIcon className="h-5 w-5 text-gray-400" />
+                          <div>
+                            <p className="text-sm font-medium">{file.name}</p>
+                            <p className="text-xs text-gray-500">
+                              {formatBytes(file.size)}
+                            </p>
+                          </div>
+                        </div>
+                        <button
+                          onClick={() => removeFile(index)}
+                          className="text-red-600 hover:text-red-700"
+                        >
+                          Remover
+                        </button>
+                      </div>
+                    ))}
+                  </div>
+                </div>
+              )}
+            </div>
+
+            {/* Configurações específicas */}
+            <div className="bg-white rounded-lg shadow p-6">
+              <h2 className="text-xl font-semibold mb-4">Configurações</h2>
+
+              {selectedOperation === 'compress' && (
+                <div>
+                  <label className="block text-sm font-medium mb-2">
+                    Qualidade ({compressQuality}%)
+                  </label>
+                  <input
+                    type="range"
+                    min="50"
+                    max="100"
+                    value={compressQuality}
+                    onChange={(e) => setCompressQuality(parseInt(e.target.value))}
+                    className="w-full"
+                  />
+                  <p className="text-xs text-gray-500 mt-1">
+                    95% recomendado para qualidade sem perda perceptível
+                  </p>
+                </div>
+              )}
+
+              {selectedOperation === 'split' && (
+                <div className="space-y-4">
+                  <div>
+                    <label className="block text-sm font-medium mb-2">
+                      Tipo de divisão
+                    </label>
+                    <select
+                      value={splitType}
+                      onChange={(e) => setSplitType(e.target.value as any)}
+                      className="w-full border border-gray-300 rounded-lg px-3 py-2"
+                    >
+                      <option value="pages">Páginas específicas</option>
+                      <option value="range">Intervalos</option>
+                      <option value="chunks">Chunks (partes iguais)</option>
+                    </select>
+                  </div>
+
+                  {splitType === 'pages' && (
+                    <div>
+                      <label className="block text-sm font-medium mb-2">
+                        Páginas (separadas por vírgula)
+                      </label>
+                      <input
+                        type="text"
+                        value={splitPages}
+                        onChange={(e) => setSplitPages(e.target.value)}
+                        placeholder="1,2,3,5,8"
+                        className="w-full border border-gray-300 rounded-lg px-3 py-2"
+                      />
+                    </div>
+                  )}
+
+                  {splitType === 'range' && (
+                    <div>
+                      <label className="block text-sm font-medium mb-2">
+                        Intervalos (ex: 1-5,6-10)
+                      </label>
+                      <input
+                        type="text"
+                        value={splitRanges}
+                        onChange={(e) => setSplitRanges(e.target.value)}
+                        placeholder="1-5,6-10,11-15"
+                        className="w-full border border-gray-300 rounded-lg px-3 py-2"
+                      />
+                    </div>
+                  )}
+
+                  {splitType === 'chunks' && (
+                    <div>
+                      <label className="block text-sm font-medium mb-2">
+                        Páginas por chunk
+                      </label>
+                      <input
+                        type="number"
+                        value={chunkSize}
+                        onChange={(e) => setChunkSize(parseInt(e.target.value))}
+                        min="1"
+                        className="w-full border border-gray-300 rounded-lg px-3 py-2"
+                      />
+                    </div>
+                  )}
+                </div>
+              )}
+
+              {selectedOperation === 'pdfToImages' && (
+                <div className="space-y-4">
+                  <div>
+                    <label className="block text-sm font-medium mb-2">Formato</label>
+                    <select
+                      value={imageFormat}
+                      onChange={(e) => setImageFormat(e.target.value as any)}
+                      className="w-full border border-gray-300 rounded-lg px-3 py-2"
+                    >
+                      <option value="png">PNG</option>
+                      <option value="jpg">JPG</option>
+                      <option value="webp">WEBP</option>
+                    </select>
+                  </div>
+
+                  <div>
+                    <label className="block text-sm font-medium mb-2">
+                      Qualidade ({imageQuality}%)
+                    </label>
+                    <input
+                      type="range"
+                      min="50"
+                      max="100"
+                      value={imageQuality}
+                      onChange={(e) => setImageQuality(parseInt(e.target.value))}
+                      className="w-full"
+                    />
+                  </div>
+
+                  <div>
+                    <label className="block text-sm font-medium mb-2">
+                      DPI ({imageDensity})
+                    </label>
+                    <input
+                      type="range"
+                      min="150"
+                      max="600"
+                      step="50"
+                      value={imageDensity}
+                      onChange={(e) => setImageDensity(parseInt(e.target.value))}
+                      className="w-full"
+                    />
+                  </div>
+                </div>
+              )}
+
+              {selectedOperation === 'ocr' && (
+                <div>
+                  <label className="block text-sm font-medium mb-2">Idioma</label>
+                  <select
+                    value={ocrLanguage}
+                    onChange={(e) => setOcrLanguage(e.target.value)}
+                    className="w-full border border-gray-300 rounded-lg px-3 py-2"
+                  >
+                    <option value="por">Português</option>
+                    <option value="eng">Inglês</option>
+                    <option value="spa">Espanhol</option>
+                  </select>
+                </div>
+              )}
+
+              <button
+                onClick={processFiles}
+                disabled={processing || files.length === 0}
+                className={`mt-6 w-full py-3 rounded-lg font-medium transition-colors ${
+                  processing || files.length === 0
+                    ? 'bg-gray-300 text-gray-500 cursor-not-allowed'
+                    : 'bg-blue-600 text-white hover:bg-blue-700'
+                }`}
+              >
+                {processing ? (
+                  <span className="flex items-center justify-center">
+                    <svg
+                      className="animate-spin h-5 w-5 mr-2"
+                      xmlns="http://www.w3.org/2000/svg"
+                      fill="none"
+                      viewBox="0 0 24 24"
+                    >
+                      <circle
+                        className="opacity-25"
+                        cx="12"
+                        cy="12"
+                        r="10"
+                        stroke="currentColor"
+                        strokeWidth="4"
+                      ></circle>
+                      <path
+                        className="opacity-75"
+                        fill="currentColor"
+                        d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"
+                      ></path>
+                    </svg>
+                    Processando...
+                  </span>
+                ) : (
+                  'Processar'
+                )}
+              </button>
+            </div>
+
+            {/* Resultado */}
+            {result && (
+              <div className="bg-white rounded-lg shadow p-6">
+                <h2 className="text-xl font-semibold mb-4">Resultado</h2>
+
+                {selectedOperation === 'compress' && result.reduction !== undefined && (
+                  <div className="space-y-2">
+                    <p className="text-green-600 font-medium">
+                      Redução de {result.reduction.toFixed(2)}%
+                    </p>
+                    <p className="text-sm text-gray-600">
+                      Tempo de processamento: {result.processingTime}ms
+                    </p>
+                  </div>
+                )}
+
+                {(result.outputPaths || result.outputPath) && (
+                  <div className="mt-4">
+                    <p className="font-medium mb-2">Arquivos gerados:</p>
+                    {result.outputPaths?.map((path, index) => (
+                      <button
+                        key={index}
+                        onClick={() => downloadFile(result.operacaoId, index)}
+                        className="flex items-center space-x-2 w-full p-2 hover:bg-gray-50 rounded"
+                      >
+                        <ArrowDownTrayIcon className="h-5 w-5 text-blue-600" />
+                        <span className="text-sm">Arquivo {index + 1}</span>
+                      </button>
+                    ))}
+                    {result.outputPath && (
+                      <button
+                        onClick={() => downloadFile(result.operacaoId, 0)}
+                        className="flex items-center space-x-2 w-full p-2 hover:bg-gray-50 rounded"
+                      >
+                        <ArrowDownTrayIcon className="h-5 w-5 text-blue-600" />
+                        <span className="text-sm">Download</span>
+                      </button>
+                    )}
+                  </div>
+                )}
+
+                {selectedOperation === 'ocr' && result.text && (
+                  <div className="mt-4">
+                    <p className="font-medium mb-2">Texto extraído:</p>
+                    <div className="bg-gray-50 p-4 rounded max-h-64 overflow-y-auto">
+                      <pre className="text-sm whitespace-pre-wrap">{result.text}</pre>
+                    </div>
+                    {result.confidence && (
+                      <p className="text-sm text-gray-600 mt-2">
+                        Confiança: {result.confidence.toFixed(2)}%
+                      </p>
+                    )}
+                  </div>
+                )}
+              </div>
+            )}
+          </div>
+
+          {/* Histórico */}
+          <div className="lg:col-span-1">
+            <div className="bg-white rounded-lg shadow p-6 sticky top-8">
+              <h2 className="text-xl font-semibold mb-4">Histórico</h2>
+
+              {history.length === 0 ? (
+                <p className="text-gray-500 text-sm">Nenhuma operação ainda</p>
+              ) : (
+                <div className="space-y-3 max-h-96 overflow-y-auto">
+                  {history.map((op) => (
+                    <div key={op.id} className="border-b pb-3">
+                      <div className="flex items-center justify-between">
+                        <span className="text-sm font-medium">
+                          {op.tipoOperacao.replace('_', ' ')}
+                        </span>
+                        <span
+                          className={`text-xs px-2 py-1 rounded ${
+                            op.status === 'CONCLUIDO'
+                              ? 'bg-green-100 text-green-800'
+                              : op.status === 'ERRO'
+                              ? 'bg-red-100 text-red-800'
+                              : 'bg-yellow-100 text-yellow-800'
+                          }`}
+                        >
+                          {op.status}
+                        </span>
+                      </div>
+                      <div className="flex items-center text-xs text-gray-500 mt-1">
+                        <ClockIcon className="h-3 w-3 mr-1" />
+                        {new Date(op.criadoEm).toLocaleString('pt-BR')}
+                      </div>
+                      {op.tempoProcessamento && (
+                        <p className="text-xs text-gray-500 mt-1">
+                          {op.tempoProcessamento}ms
+                        </p>
+                      )}
+                    </div>
+                  ))}
+                </div>
+              )}
+            </div>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+};

src/services/pdfService.ts

@@ -0,0 +1,588 @@
+import { PDFDocument } from 'pdf-lib';
+import sharp from 'sharp';
+import { createWorker } from 'tesseract.js';
+import { fromPath } from 'pdf2pic';
+import fs from 'fs/promises';
+import path from 'path';
+import { v4 as uuidv4 } from 'uuid';
+
+/**
+ * Serviço completo de manipulação de PDFs
+ * Implementa compressão sem perda, divisão, mesclagem, conversão e OCR
+ */
+
+interface CompressOptions {
+  quality?: number; // 0-100, padrão 95 para qualidade alta
+  maxSizeMB?: number;
+}
+
+interface SplitOptions {
+  splitType: 'pages' | 'range' | 'chunks';
+  pages?: number[]; // Páginas específicas para extrair
+  ranges?: Array<{ start: number; end: number }>; // Intervalos de páginas
+  chunkSize?: number; // Tamanho de cada chunk em páginas
+}
+
+interface MergeOptions {
+  filePaths: string[];
+  outputPath: string;
+}
+
+interface PDFToImageOptions {
+  format?: 'png' | 'jpg' | 'webp';
+  quality?: number;
+  density?: number; // DPI, padrão 300
+  pages?: number[] | 'all'; // Páginas específicas ou todas
+}
+
+interface ImageToPDFOptions {
+  imagePaths: string[];
+  outputPath: string;
+  pageSize?: { width: number; height: number };
+  fitToPage?: boolean;
+}
+
+interface OCROptions {
+  language?: string; // padrão 'por' (português)
+  pages?: number[] | 'all';
+}
+
+interface OCRResult {
+  text: string;
+  confidence: number;
+  pages: Array<{
+    pageNumber: number;
+    text: string;
+    confidence: number;
+  }>;
+}
+
+export class PDFService {
+  private static readonly TEMP_DIR = path.join(process.cwd(), 'storage', 'temp', 'pdf-ops');
+  private static readonly OUTPUT_DIR = path.join(process.cwd(), 'storage', 'pdf-output');
+
+  /**
+   * Inicializa os diretórios necessários
+   */
+  static async initialize(): Promise<void> {
+    try {
+      await fs.mkdir(this.TEMP_DIR, { recursive: true });
+      await fs.mkdir(this.OUTPUT_DIR, { recursive: true });
+    } catch (error) {
+      console.error('Erro ao criar diretórios:', error);
+      throw new Error('Falha ao inicializar diretórios para operações de PDF');
+    }
+  }
+
+  /**
+   * Comprime um PDF mantendo a qualidade máxima possível
+   * Usa otimização de streams e remoção de metadados desnecessários
+   */
+  static async compressPDF(
+    inputPath: string,
+    outputPath?: string,
+    options: CompressOptions = {}
+  ): Promise<{ outputPath: string; originalSize: number; compressedSize: number; reduction: number }> {
+    try {
+      await this.initialize();
+
+      const { quality = 95 } = options;
+
+      // Lê o PDF original
+      const pdfBytes = await fs.readFile(inputPath);
+      const originalSize = pdfBytes.length;
+
+      // Carrega o PDF
+      const pdfDoc = await PDFDocument.load(pdfBytes, {
+        updateMetadata: false,
+      });
+
+      // Remove metadados desnecessários mas mantém metadados essenciais
+      pdfDoc.setTitle('');
+      pdfDoc.setAuthor('');
+      pdfDoc.setSubject('');
+      pdfDoc.setKeywords([]);
+      pdfDoc.setProducer('');
+      pdfDoc.setCreator('');
+
+      // Salva com compressão
+      const compressedBytes = await pdfDoc.save({
+        useObjectStreams: true, // Comprime streams de objetos
+        addDefaultPage: false,
+        objectsPerTick: 50,
+      });
+
+      // Se a compressão não foi suficiente, otimiza as imagens
+      let finalBytes = compressedBytes;
+      
+      if (options.maxSizeMB && compressedBytes.length > options.maxSizeMB * 1024 * 1024) {
+        // Recarrega para otimizar imagens
+        const reloadedDoc = await PDFDocument.load(compressedBytes);
+        const pages = reloadedDoc.getPages();
+
+        // Processa cada página para otimizar imagens
+        for (const page of pages) {
+          // A otimização de imagens seria feita aqui
+          // Por limitações da pdf-lib, mantemos a qualidade original
+        }
+
+        finalBytes = await reloadedDoc.save({
+          useObjectStreams: true,
+          addDefaultPage: false,
+        });
+      }
+
+      // Define o caminho de saída
+      const finalOutputPath = outputPath || path.join(
+        this.OUTPUT_DIR,
+        `compressed-${uuidv4()}.pdf`
+      );
+
+      // Salva o arquivo comprimido
+      await fs.writeFile(finalOutputPath, finalBytes);
+
+      const compressedSize = finalBytes.length;
+      const reduction = ((originalSize - compressedSize) / originalSize) * 100;
+
+      return {
+        outputPath: finalOutputPath,
+        originalSize,
+        compressedSize,
+        reduction: Math.max(0, reduction),
+      };
+    } catch (error) {
+      console.error('Erro ao comprimir PDF:', error);
+      throw new Error(`Falha ao comprimir PDF: ${error instanceof Error ? error.message : 'Erro desconhecido'}`);
+    }
+  }
+
+  /**
+   * Divide um PDF em múltiplos arquivos
+   */
+  static async splitPDF(
+    inputPath: string,
+    options: SplitOptions
+  ): Promise<string[]> {
+    try {
+      await this.initialize();
+
+      const pdfBytes = await fs.readFile(inputPath);
+      const pdfDoc = await PDFDocument.load(pdfBytes);
+      const totalPages = pdfDoc.getPageCount();
+      const outputPaths: string[] = [];
+
+      if (options.splitType === 'pages' && options.pages) {
+        // Divide em páginas específicas
+        for (const pageNum of options.pages) {
+          if (pageNum < 1 || pageNum > totalPages) {
+            throw new Error(`Página ${pageNum} inválida. O PDF tem ${totalPages} páginas.`);
+          }
+
+          const newDoc = await PDFDocument.create();
+          const [copiedPage] = await newDoc.copyPages(pdfDoc, [pageNum - 1]);
+          newDoc.addPage(copiedPage);
+
+          const outputPath = path.join(this.OUTPUT_DIR, `split-page-${pageNum}-${uuidv4()}.pdf`);
+          const newPdfBytes = await newDoc.save();
+          await fs.writeFile(outputPath, newPdfBytes);
+          outputPaths.push(outputPath);
+        }
+      } else if (options.splitType === 'range' && options.ranges) {
+        // Divide em intervalos de páginas
+        for (let i = 0; i < options.ranges.length; i++) {
+          const { start, end } = options.ranges[i];
+
+          if (start < 1 || end > totalPages || start > end) {
+            throw new Error(`Intervalo inválido: ${start}-${end}. O PDF tem ${totalPages} páginas.`);
+          }
+
+          const newDoc = await PDFDocument.create();
+          const pageIndices = Array.from({ length: end - start + 1 }, (_, idx) => start - 1 + idx);
+          const copiedPages = await newDoc.copyPages(pdfDoc, pageIndices);
+          copiedPages.forEach((page) => newDoc.addPage(page));
+
+          const outputPath = path.join(this.OUTPUT_DIR, `split-range-${start}-${end}-${uuidv4()}.pdf`);
+          const newPdfBytes = await newDoc.save();
+          await fs.writeFile(outputPath, newPdfBytes);
+          outputPaths.push(outputPath);
+        }
+      } else if (options.splitType === 'chunks' && options.chunkSize) {
+        // Divide em chunks de tamanho fixo
+        const chunkSize = options.chunkSize;
+        const numChunks = Math.ceil(totalPages / chunkSize);
+
+        for (let i = 0; i < numChunks; i++) {
+          const startPage = i * chunkSize;
+          const endPage = Math.min((i + 1) * chunkSize, totalPages);
+
+          const newDoc = await PDFDocument.create();
+          const pageIndices = Array.from({ length: endPage - startPage }, (_, idx) => startPage + idx);
+          const copiedPages = await newDoc.copyPages(pdfDoc, pageIndices);
+          copiedPages.forEach((page) => newDoc.addPage(page));
+
+          const outputPath = path.join(this.OUTPUT_DIR, `split-chunk-${i + 1}-${uuidv4()}.pdf`);
+          const newPdfBytes = await newDoc.save();
+          await fs.writeFile(outputPath, newPdfBytes);
+          outputPaths.push(outputPath);
+        }
+      } else {
+        throw new Error('Opções de divisão inválidas');
+      }
+
+      return outputPaths;
+    } catch (error) {
+      console.error('Erro ao dividir PDF:', error);
+      throw new Error(`Falha ao dividir PDF: ${error instanceof Error ? error.message : 'Erro desconhecido'}`);
+    }
+  }
+
+  /**
+   * Mescla múltiplos PDFs em um único arquivo
+   */
+  static async mergePDFs(options: MergeOptions): Promise<string> {
+    try {
+      await this.initialize();
+
+      if (!options.filePaths || options.filePaths.length === 0) {
+        throw new Error('Nenhum arquivo fornecido para mesclagem');
+      }
+
+      const mergedDoc = await PDFDocument.create();
+
+      // Mescla cada PDF
+      for (const filePath of options.filePaths) {
+        try {
+          const pdfBytes = await fs.readFile(filePath);
+          const pdfDoc = await PDFDocument.load(pdfBytes);
+          const copiedPages = await mergedDoc.copyPages(pdfDoc, pdfDoc.getPageIndices());
+          copiedPages.forEach((page) => mergedDoc.addPage(page));
+        } catch (error) {
+          console.error(`Erro ao processar arquivo ${filePath}:`, error);
+          throw new Error(`Falha ao processar arquivo ${path.basename(filePath)}`);
+        }
+      }
+
+      const outputPath = options.outputPath || path.join(
+        this.OUTPUT_DIR,
+        `merged-${uuidv4()}.pdf`
+      );
+
+      const mergedBytes = await mergedDoc.save();
+      await fs.writeFile(outputPath, mergedBytes);
+
+      return outputPath;
+    } catch (error) {
+      console.error('Erro ao mesclar PDFs:', error);
+      throw new Error(`Falha ao mesclar PDFs: ${error instanceof Error ? error.message : 'Erro desconhecido'}`);
+    }
+  }
+
+  /**
+   * Converte páginas de PDF em imagens
+   */
+  static async pdfToImages(
+    inputPath: string,
+    options: PDFToImageOptions = {}
+  ): Promise<string[]> {
+    try {
+      await this.initialize();
+
+      const {
+        format = 'png',
+        quality = 95,
+        density = 300,
+        pages = 'all',
+      } = options;
+
+      const pdfBytes = await fs.readFile(inputPath);
+      const pdfDoc = await PDFDocument.load(pdfBytes);
+      const totalPages = pdfDoc.getPageCount();
+
+      // Determina quais páginas converter
+      const pagesToConvert = pages === 'all'
+        ? Array.from({ length: totalPages }, (_, i) => i + 1)
+        : pages;
+
+      const outputPaths: string[] = [];
+
+      // Configura o conversor
+      const converter = fromPath(inputPath, {
+        density,
+        saveFilename: uuidv4(),
+        savePath: this.OUTPUT_DIR,
+        format,
+        width: 2480, // A4 em 300 DPI
+        height: 3508,
+      });
+
+      // Converte cada página
+      for (const pageNum of pagesToConvert) {
+        if (pageNum < 1 || pageNum > totalPages) {
+          console.warn(`Página ${pageNum} ignorada - fora do intervalo`);
+          continue;
+        }
+
+        try {
+          const result = await converter(pageNum, { responseType: 'image' });
+          
+          if (result && typeof result === 'object' && 'path' in result) {
+            const imagePath = result.path as string;
+            
+            // Otimiza a imagem com sharp
+            const optimizedPath = path.join(
+              this.OUTPUT_DIR,
+              `page-${pageNum}-${uuidv4()}.${format}`
+            );
+
+            if (format === 'jpg') {
+              await sharp(imagePath)
+                .jpeg({ quality, progressive: true })
+                .toFile(optimizedPath);
+            } else if (format === 'png') {
+              await sharp(imagePath)
+                .png({ quality, progressive: true, compressionLevel: 9 })
+                .toFile(optimizedPath);
+            } else if (format === 'webp') {
+              await sharp(imagePath)
+                .webp({ quality })
+                .toFile(optimizedPath);
+            }
+
+            // Remove o arquivo temporário
+            await fs.unlink(imagePath).catch(() => {});
+
+            outputPaths.push(optimizedPath);
+          }
+        } catch (error) {
+          console.error(`Erro ao converter página ${pageNum}:`, error);
+        }
+      }
+
+      return outputPaths;
+    } catch (error) {
+      console.error('Erro ao converter PDF para imagens:', error);
+      throw new Error(`Falha ao converter PDF para imagens: ${error instanceof Error ? error.message : 'Erro desconhecido'}`);
+    }
+  }
+
+  /**
+   * Converte imagens em PDF
+   */
+  static async imagesToPDF(options: ImageToPDFOptions): Promise<string> {
+    try {
+      await this.initialize();
+
+      if (!options.imagePaths || options.imagePaths.length === 0) {
+        throw new Error('Nenhuma imagem fornecida para conversão');
+      }
+
+      const pdfDoc = await PDFDocument.create();
+
+      for (const imagePath of options.imagePaths) {
+        try {
+          const imageBytes = await fs.readFile(imagePath);
+          const ext = path.extname(imagePath).toLowerCase();
+
+          let image;
+          if (ext === '.png') {
+            image = await pdfDoc.embedPng(imageBytes);
+          } else if (ext === '.jpg' || ext === '.jpeg') {
+            image = await pdfDoc.embedJpg(imageBytes);
+          } else {
+            // Converte outros formatos para PNG primeiro
+            const pngBuffer = await sharp(imageBytes).png().toBuffer();
+            image = await pdfDoc.embedPng(pngBuffer);
+          }
+
+          const { width, height } = image;
+
+          // Define o tamanho da página
+          let pageWidth = width;
+          let pageHeight = height;
+
+          if (options.pageSize) {
+            pageWidth = options.pageSize.width;
+            pageHeight = options.pageSize.height;
+          }
+
+          const page = pdfDoc.addPage([pageWidth, pageHeight]);
+
+          // Calcula dimensões para ajustar à página se necessário
+          if (options.fitToPage) {
+            const scale = Math.min(pageWidth / width, pageHeight / height);
+            const scaledWidth = width * scale;
+            const scaledHeight = height * scale;
+            const x = (pageWidth - scaledWidth) / 2;
+            const y = (pageHeight - scaledHeight) / 2;
+
+            page.drawImage(image, {
+              x,
+              y,
+              width: scaledWidth,
+              height: scaledHeight,
+            });
+          } else {
+            page.drawImage(image, {
+              x: 0,
+              y: 0,
+              width: pageWidth,
+              height: pageHeight,
+            });
+          }
+        } catch (error) {
+          console.error(`Erro ao processar imagem ${imagePath}:`, error);
+          throw new Error(`Falha ao processar imagem ${path.basename(imagePath)}`);
+        }
+      }
+
+      const outputPath = options.outputPath || path.join(
+        this.OUTPUT_DIR,
+        `images-to-pdf-${uuidv4()}.pdf`
+      );
+
+      const pdfBytes = await pdfDoc.save();
+      await fs.writeFile(outputPath, pdfBytes);
+
+      return outputPath;
+    } catch (error) {
+      console.error('Erro ao converter imagens para PDF:', error);
+      throw new Error(`Falha ao converter imagens para PDF: ${error instanceof Error ? error.message : 'Erro desconhecido'}`);
+    }
+  }
+
+  /**
+   * Realiza OCR em um PDF e extrai o texto
+   */
+  static async performOCR(
+    inputPath: string,
+    options: OCROptions = {}
+  ): Promise<OCRResult> {
+    try {
+      await this.initialize();
+
+      const { language = 'por', pages = 'all' } = options;
+
+      // Primeiro converte o PDF em imagens
+      const imageOptions: PDFToImageOptions = {
+        format: 'png',
+        density: 300,
+        pages,
+      };
+
+      const imagePaths = await this.pdfToImages(inputPath, imageOptions);
+
+      // Cria um worker do Tesseract
+      const worker = await createWorker(language);
+
+      const pageResults: Array<{
+        pageNumber: number;
+        text: string;
+        confidence: number;
+      }> = [];
+
+      let allText = '';
+      let totalConfidence = 0;
+
+      // Processa cada imagem
+      for (let i = 0; i < imagePaths.length; i++) {
+        try {
+          const imagePath = imagePaths[i];
+          const { data } = await worker.recognize(imagePath);
+
+          pageResults.push({
+            pageNumber: i + 1,
+            text: data.text,
+            confidence: data.confidence,
+          });
+
+          allText += data.text + '\n\n';
+          totalConfidence += data.confidence;
+
+          // Remove a imagem temporária
+          await fs.unlink(imagePath).catch(() => {});
+        } catch (error) {
+          console.error(`Erro ao processar OCR na página ${i + 1}:`, error);
+        }
+      }
+
+      await worker.terminate();
+
+      const averageConfidence = pageResults.length > 0
+        ? totalConfidence / pageResults.length
+        : 0;
+
+      return {
+        text: allText.trim(),
+        confidence: averageConfidence,
+        pages: pageResults,
+      };
+    } catch (error) {
+      console.error('Erro ao realizar OCR:', error);
+      throw new Error(`Falha ao realizar OCR: ${error instanceof Error ? error.message : 'Erro desconhecido'}`);
+    }
+  }
+
+  /**
+   * Limpa arquivos temporários antigos
+   */
+  static async cleanupOldFiles(olderThanHours: number = 24): Promise<void> {
+    try {
+      const dirs = [this.TEMP_DIR, this.OUTPUT_DIR];
+      const now = Date.now();
+      const maxAge = olderThanHours * 60 * 60 * 1000;
+
+      for (const dir of dirs) {
+        try {
+          const files = await fs.readdir(dir);
+
+          for (const file of files) {
+            const filePath = path.join(dir, file);
+            const stats = await fs.stat(filePath);
+
+            if (now - stats.mtimeMs > maxAge) {
+              await fs.unlink(filePath);
+              console.log(`Arquivo removido: ${filePath}`);
+            }
+          }
+        } catch (error) {
+          console.error(`Erro ao limpar diretório ${dir}:`, error);
+        }
+      }
+    } catch (error) {
+      console.error('Erro ao limpar arquivos antigos:', error);
+    }
+  }
+
+  /**
+   * Obtém informações sobre um PDF
+   */
+  static async getPDFInfo(filePath: string): Promise<{
+    pages: number;
+    size: number;
+    title?: string;
+    author?: string;
+    creator?: string;
+    producer?: string;
+    creationDate?: Date;
+    modificationDate?: Date;
+  }> {
+    try {
+      const pdfBytes = await fs.readFile(filePath);
+      const pdfDoc = await PDFDocument.load(pdfBytes);
+
+      return {
+        pages: pdfDoc.getPageCount(),
+        size: pdfBytes.length,
+        title: pdfDoc.getTitle(),
+        author: pdfDoc.getAuthor(),
+        creator: pdfDoc.getCreator(),
+        producer: pdfDoc.getProducer(),
+        creationDate: pdfDoc.getCreationDate(),
+        modificationDate: pdfDoc.getModificationDate(),
+      };
+    } catch (error) {
+      console.error('Erro ao obter informações do PDF:', error);
+      throw new Error(`Falha ao obter informações do PDF: ${error instanceof Error ? error.message : 'Erro desconhecido'}`);
+    }
+  }
+}