Integrar LibreTranslate para traducao automatica

frontend/src/app/api/translate/route.ts

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+import { NextRequest, NextResponse } from 'next/server';
+
+const LIBRETRANSLATE_URL = process.env.LIBRETRANSLATE_URL || 'https://libretranslate.stackbyte.cloud';
+
+// Cache simples em memória para traduções
+const translationCache = new Map<string, { text: string; timestamp: number }>();
+const CACHE_TTL = 1000 * 60 * 60 * 24; // 24 horas
+
+export async function POST(request: NextRequest) {
+  try {
+    const { text, source = 'pt', target = 'en' } = await request.json();
+
+    if (!text || typeof text !== 'string') {
+      return NextResponse.json({ error: 'Texto é obrigatório' }, { status: 400 });
+    }
+
+    // Se origem e destino são iguais, retorna o texto original
+    if (source === target) {
+      return NextResponse.json({ translatedText: text });
+    }
+
+    // Verificar cache
+    const cacheKey = `${source}:${target}:${text}`;
+    const cached = translationCache.get(cacheKey);
+    
+    if (cached && Date.now() - cached.timestamp < CACHE_TTL) {
+      return NextResponse.json({ translatedText: cached.text, cached: true });
+    }
+
+    // Chamar LibreTranslate
+    const response = await fetch(`${LIBRETRANSLATE_URL}/translate`, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify({
+        q: text,
+        source: source,
+        target: target,
+        format: 'text',
+      }),
+    });
+
+    if (!response.ok) {
+      console.error('LibreTranslate error:', await response.text());
+      return NextResponse.json({ translatedText: text }); // Fallback: retorna original
+    }
+
+    const data = await response.json();
+    const translatedText = data.translatedText || text;
+
+    // Salvar no cache
+    translationCache.set(cacheKey, { text: translatedText, timestamp: Date.now() });
+
+    return NextResponse.json({ translatedText });
+  } catch (error) {
+    console.error('Translation error:', error);
+    return NextResponse.json({ error: 'Erro ao traduzir' }, { status: 500 });
+  }
+}
+
+// Endpoint para traduzir múltiplos textos de uma vez
+export async function PUT(request: NextRequest) {
+  try {
+    const { texts, source = 'pt', target = 'en' } = await request.json();
+
+    if (!texts || !Array.isArray(texts)) {
+      return NextResponse.json({ error: 'Array de textos é obrigatório' }, { status: 400 });
+    }
+
+    if (source === target) {
+      return NextResponse.json({ translations: texts });
+    }
+
+    const translations = await Promise.all(
+      texts.map(async (text: string) => {
+        if (!text) return text;
+
+        const cacheKey = `${source}:${target}:${text}`;
+        const cached = translationCache.get(cacheKey);
+
+        if (cached && Date.now() - cached.timestamp < CACHE_TTL) {
+          return cached.text;
+        }
+
+        try {
+          const response = await fetch(`${LIBRETRANSLATE_URL}/translate`, {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ q: text, source, target, format: 'text' }),
+          });
+
+          if (response.ok) {
+            const data = await response.json();
+            const translatedText = data.translatedText || text;
+            translationCache.set(cacheKey, { text: translatedText, timestamp: Date.now() });
+            return translatedText;
+          }
+        } catch (e) {
+          console.error('Translation error for:', text, e);
+        }
+
+        return text; // Fallback
+      })
+    );
+
+    return NextResponse.json({ translations });
+  } catch (error) {
+    console.error('Batch translation error:', error);
+    return NextResponse.json({ error: 'Erro ao traduzir' }, { status: 500 });
+  }
+}

frontend/src/components/TranslatedText.tsx

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+'use client';
+
+import { useEffect, useState, ElementType, ComponentPropsWithoutRef } from 'react';
+import { useTranslate } from '@/hooks/useTranslate';
+
+interface TranslatedTextProps {
+  text: string;
+  as?: 'span' | 'p' | 'h1' | 'h2' | 'h3' | 'h4' | 'h5' | 'h6' | 'div' | 'li';
+  className?: string;
+}
+
+/**
+ * Componente que traduz texto automaticamente via LibreTranslate
+ * quando o idioma não é português
+ */
+export function TranslatedText({ text, as = 'span', className }: TranslatedTextProps) {
+  const { translate, language } = useTranslate();
+  const [translatedText, setTranslatedText] = useState(text);
+  const [isLoading, setIsLoading] = useState(false);
+
+  useEffect(() => {
+    if (language === 'PT') {
+      setTranslatedText(text);
+      return;
+    }
+
+    let cancelled = false;
+    setIsLoading(true);
+
+    translate(text).then((result) => {
+      if (!cancelled) {
+        setTranslatedText(result);
+        setIsLoading(false);
+      }
+    });
+
+    return () => {
+      cancelled = true;
+    };
+  }, [text, language, translate]);
+
+  const Tag = as;
+
+  return (
+    <Tag className={className} data-translating={isLoading}>
+      {translatedText}
+    </Tag>
+  );
+}
+
+/**
+ * Hook para traduzir objetos de conteúdo do banco de dados
+ */
+export function useTranslatedContent<T extends Record<string, unknown>>(content: T): { 
+  translatedContent: T; 
+  isTranslating: boolean 
+} {
+  const { translateBatch, language } = useTranslate();
+  const [translatedContent, setTranslatedContent] = useState<T>(content);
+  const [isTranslating, setIsTranslating] = useState(false);
+
+  useEffect(() => {
+    if (language === 'PT') {
+      setTranslatedContent(content);
+      return;
+    }
+
+    let cancelled = false;
+
+    const translateContent = async () => {
+      setIsTranslating(true);
+
+      // Extrair todos os textos do objeto
+      const texts: string[] = [];
+      const paths: string[] = [];
+
+      const extractTexts = (obj: unknown, path: string = '') => {
+        if (typeof obj === 'string' && obj.length > 0) {
+          texts.push(obj);
+          paths.push(path);
+        } else if (Array.isArray(obj)) {
+          obj.forEach((item, index) => extractTexts(item, `${path}[${index}]`));
+        } else if (obj && typeof obj === 'object') {
+          Object.entries(obj).forEach(([key, value]) => {
+            extractTexts(value, path ? `${path}.${key}` : key);
+          });
+        }
+      };
+
+      extractTexts(content);
+
+      if (texts.length === 0) {
+        setIsTranslating(false);
+        return;
+      }
+
+      try {
+        const translations = await translateBatch(texts);
+
+        if (cancelled) return;
+
+        // Reconstruir objeto com traduções
+        const newContent = JSON.parse(JSON.stringify(content));
+
+        paths.forEach((path, index) => {
+          const parts = path.replace(/\[(\d+)\]/g, '.$1').split('.');
+          let current: Record<string, unknown> = newContent;
+
+          for (let i = 0; i < parts.length - 1; i++) {
+            current = current[parts[i]] as Record<string, unknown>;
+          }
+
+          current[parts[parts.length - 1]] = translations[index];
+        });
+
+        setTranslatedContent(newContent);
+      } catch (error) {
+        console.error('Translation error:', error);
+      } finally {
+        if (!cancelled) {
+          setIsTranslating(false);
+        }
+      }
+    };
+
+    translateContent();
+
+    return () => {
+      cancelled = true;
+    };
+  }, [content, language, translateBatch]);
+
+  return { translatedContent, isTranslating };
+}

frontend/src/hooks/useTranslate.ts

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+'use client';
+
+import { useState, useCallback } from 'react';
+import { useLanguage } from '@/contexts/LanguageContext';
+
+// Cache local no cliente
+const clientCache = new Map<string, string>();
+
+export function useTranslate() {
+  const { language } = useLanguage();
+  const [isTranslating, setIsTranslating] = useState(false);
+
+  const translate = useCallback(async (text: string): Promise<string> => {
+    if (!text || language === 'PT') return text;
+
+    const targetLang = language.toLowerCase(); // PT -> pt, EN -> en, ES -> es
+    const cacheKey = `pt:${targetLang}:${text}`;
+    
+    // Verificar cache local
+    if (clientCache.has(cacheKey)) {
+      return clientCache.get(cacheKey)!;
+    }
+
+    try {
+      setIsTranslating(true);
+      const response = await fetch('/api/translate', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ text, source: 'pt', target: targetLang }),
+      });
+
+      if (response.ok) {
+        const data = await response.json();
+        clientCache.set(cacheKey, data.translatedText);
+        return data.translatedText;
+      }
+    } catch (error) {
+      console.error('Translation error:', error);
+    } finally {
+      setIsTranslating(false);
+    }
+
+    return text;
+  }, [language]);
+
+  const translateBatch = useCallback(async (texts: string[]): Promise<string[]> => {
+    if (language === 'PT') return texts;
+
+    const targetLang = language.toLowerCase();
+
+    // Separar textos em cache e não em cache
+    const results: string[] = new Array(texts.length);
+    const toTranslate: { index: number; text: string }[] = [];
+
+    texts.forEach((text, index) => {
+      if (!text) {
+        results[index] = text;
+        return;
+      }
+
+      const cacheKey = `pt:${targetLang}:${text}`;
+      if (clientCache.has(cacheKey)) {
+        results[index] = clientCache.get(cacheKey)!;
+      } else {
+        toTranslate.push({ index, text });
+      }
+    });
+
+    if (toTranslate.length === 0) return results;
+
+    try {
+      setIsTranslating(true);
+      const response = await fetch('/api/translate', {
+        method: 'PUT',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          texts: toTranslate.map(t => t.text),
+          source: 'pt',
+          target: targetLang,
+        }),
+      });
+
+      if (response.ok) {
+        const data = await response.json();
+        toTranslate.forEach((item, i) => {
+          const translated = data.translations[i];
+          results[item.index] = translated;
+          clientCache.set(`pt:${targetLang}:${item.text}`, translated);
+        });
+      } else {
+        // Fallback: usar texto original
+        toTranslate.forEach(item => {
+          results[item.index] = item.text;
+        });
+      }
+    } catch (error) {
+      console.error('Batch translation error:', error);
+      toTranslate.forEach(item => {
+        results[item.index] = item.text;
+      });
+    } finally {
+      setIsTranslating(false);
+    }
+
+    return results;
+  }, [language]);
+
+  return { translate, translateBatch, isTranslating, language };
+}