Merge pull request #258 from the-luap/feat/email-template-translations

feat: multilingual email templates with translations table

backend/migrations/core/075_email_template_translations.js

@@ -0,0 +1,281 @@
+/**
+ * Migration to create email_template_translations table
+ * Moves from per-column language support (subject_en, subject_de) to a
+ * normalized translations table where each language is a row.
+ * This allows adding new languages without schema changes.
+ */
+exports.up = async function(knex) {
+  // 1. Create the email_template_translations table
+  await knex.schema.createTable('email_template_translations', (table) => {
+    table.increments('id').primary();
+    table.integer('template_id').unsigned().notNullable()
+      .references('id').inTable('email_templates').onDelete('CASCADE');
+    table.string('language', 10).notNullable();
+    table.text('subject');
+    table.text('body_html');
+    table.text('body_text');
+    table.datetime('created_at').defaultTo(knex.fn.now());
+    table.datetime('updated_at').defaultTo(knex.fn.now());
+    table.unique(['template_id', 'language']);
+  });
+
+  console.log('Created email_template_translations table');
+
+  // 2. Migrate existing data from email_templates columns into rows
+  const templates = await knex('email_templates').select('*');
+  const columnInfo = await knex('email_templates').columnInfo();
+  const hasLangColumns = !!columnInfo.subject_en;
+
+  for (const template of templates) {
+    // Extract EN translation
+    const enSubject = hasLangColumns
+      ? (template.subject_en || template.subject || '')
+      : (template.subject || '');
+    const enHtml = hasLangColumns
+      ? (template.body_html_en || template.body_html || '')
+      : (template.body_html || '');
+    const enText = hasLangColumns
+      ? (template.body_text_en || template.body_text || '')
+      : (template.body_text || '');
+
+    // Insert EN translation
+    if (enSubject || enHtml) {
+      await knex('email_template_translations').insert({
+        template_id: template.id,
+        language: 'en',
+        subject: enSubject,
+        body_html: enHtml,
+        body_text: enText,
+        created_at: new Date(),
+        updated_at: new Date(),
+      });
+    }
+
+    // Extract DE translation (only if lang columns exist)
+    if (hasLangColumns) {
+      const deSubject = template.subject_de || '';
+      const deHtml = template.body_html_de || '';
+      const deText = template.body_text_de || '';
+
+      // Only insert if DE content differs from EN or has content
+      if (deSubject || deHtml) {
+        await knex('email_template_translations').insert({
+          template_id: template.id,
+          language: 'de',
+          subject: deSubject,
+          body_html: deHtml,
+          body_text: deText,
+          created_at: new Date(),
+          updated_at: new Date(),
+        });
+      }
+    }
+  }
+
+  console.log(`Migrated ${templates.length} templates to translations table`);
+
+  // 3. Seed NL, PT, RU translations for customer-facing templates
+  // Look up template IDs
+  const customerTemplates = await knex('email_templates')
+    .whereIn('template_key', [
+      'gallery_created', 'expiration_warning', 'gallery_expired', 'archive_complete'
+    ])
+    .select('id', 'template_key');
+
+  const templateMap = {};
+  customerTemplates.forEach(t => { templateMap[t.template_key] = t.id; });
+
+  const seedTranslations = [];
+
+  // --- gallery_created ---
+  if (templateMap.gallery_created) {
+    const id = templateMap.gallery_created;
+    seedTranslations.push(
+      {
+        template_id: id, language: 'nl',
+        subject: 'Uw fotogalerij is klaar!',
+        body_html: `<h2>Galerij succesvol aangemaakt</h2>
+<p>Beste {{host_name}},</p>
+<p>Uw fotogalerij "{{event_name}}" is succesvol aangemaakt!</p>
+<p><strong>Galerij details:</strong></p>
+<ul>
+  <li>Evenementdatum: {{event_date}}</li>
+  <li>Galerij link: <a href="{{gallery_link}}">{{gallery_link}}</a></li>
+  <li>Wachtwoord: {{gallery_password}}</li>
+  <li>Verloopt op: {{expiry_date}}</li>
+</ul>
+<p>Deel deze link en het wachtwoord met uw gasten zodat zij de foto's kunnen bekijken en downloaden.</p>
+{{#if welcome_message}}<p><em>{{welcome_message}}</em></p>{{/if}}`,
+        body_text: `Galerij succesvol aangemaakt\n\nBeste {{host_name}},\n\nUw fotogalerij "{{event_name}}" is succesvol aangemaakt!\n\nGalerij link: {{gallery_link}}\nWachtwoord: {{gallery_password}}\nVerloopt op: {{expiry_date}}`,
+      },
+      {
+        template_id: id, language: 'pt',
+        subject: 'Sua galeria de fotos está pronta!',
+        body_html: `<h2>Galeria criada com sucesso</h2>
+<p>Prezado(a) {{host_name}},</p>
+<p>Sua galeria de fotos "{{event_name}}" foi criada com sucesso!</p>
+<p><strong>Detalhes da galeria:</strong></p>
+<ul>
+  <li>Data do evento: {{event_date}}</li>
+  <li>Link da galeria: <a href="{{gallery_link}}">{{gallery_link}}</a></li>
+  <li>Senha: {{gallery_password}}</li>
+  <li>Expira em: {{expiry_date}}</li>
+</ul>
+<p>Compartilhe este link e senha com seus convidados para que possam visualizar e baixar as fotos.</p>
+{{#if welcome_message}}<p><em>{{welcome_message}}</em></p>{{/if}}`,
+        body_text: `Galeria criada com sucesso\n\nPrezado(a) {{host_name}},\n\nSua galeria de fotos "{{event_name}}" foi criada com sucesso!\n\nLink da galeria: {{gallery_link}}\nSenha: {{gallery_password}}\nExpira em: {{expiry_date}}`,
+      },
+      {
+        template_id: id, language: 'ru',
+        subject: 'Ваша фотогалерея готова!',
+        body_html: `<h2>Галерея успешно создана</h2>
+<p>Уважаемый(ая) {{host_name}},</p>
+<p>Ваша фотогалерея "{{event_name}}" была успешно создана!</p>
+<p><strong>Детали галереи:</strong></p>
+<ul>
+  <li>Дата события: {{event_date}}</li>
+  <li>Ссылка на галерею: <a href="{{gallery_link}}">{{gallery_link}}</a></li>
+  <li>Пароль: {{gallery_password}}</li>
+  <li>Срок действия: {{expiry_date}}</li>
+</ul>
+<p>Поделитесь этой ссылкой и паролем с вашими гостями, чтобы они могли просматривать и скачивать фотографии.</p>
+{{#if welcome_message}}<p><em>{{welcome_message}}</em></p>{{/if}}`,
+        body_text: `Галерея успешно создана\n\nУважаемый(ая) {{host_name}},\n\nВаша фотогалерея "{{event_name}}" была успешно создана!\n\nСсылка: {{gallery_link}}\nПароль: {{gallery_password}}\nСрок действия: {{expiry_date}}`,
+      },
+    );
+  }
+
+  // --- expiration_warning ---
+  if (templateMap.expiration_warning) {
+    const id = templateMap.expiration_warning;
+    seedTranslations.push(
+      {
+        template_id: id, language: 'nl',
+        subject: 'Uw fotogalerij verloopt binnenkort',
+        body_html: `<h2>Galerij verloopt binnenkort</h2>
+<p>Beste {{host_name}},</p>
+<p>Uw fotogalerij "{{event_name}}" verloopt over {{days_remaining}} dagen.</p>
+<p>Na het verlopen wordt de galerij gearchiveerd en is niet meer toegankelijk voor gasten.</p>
+<p><a href="{{gallery_link}}">Galerij bezoeken</a></p>`,
+        body_text: `Galerij verloopt binnenkort\n\nBeste {{host_name}},\n\nUw fotogalerij "{{event_name}}" verloopt over {{days_remaining}} dagen.\n\nGalerij: {{gallery_link}}`,
+      },
+      {
+        template_id: id, language: 'pt',
+        subject: 'Sua galeria de fotos expira em breve',
+        body_html: `<h2>Galeria expirando em breve</h2>
+<p>Prezado(a) {{host_name}},</p>
+<p>Sua galeria de fotos "{{event_name}}" expirará em {{days_remaining}} dias.</p>
+<p>Após a expiração, a galeria será arquivada e não estará mais acessível aos convidados.</p>
+<p><a href="{{gallery_link}}">Visitar galeria</a></p>`,
+        body_text: `Galeria expirando em breve\n\nPrezado(a) {{host_name}},\n\nSua galeria de fotos "{{event_name}}" expirará em {{days_remaining}} dias.\n\nGaleria: {{gallery_link}}`,
+      },
+      {
+        template_id: id, language: 'ru',
+        subject: 'Срок действия вашей фотогалереи скоро истекает',
+        body_html: `<h2>Срок действия галереи истекает</h2>
+<p>Уважаемый(ая) {{host_name}},</p>
+<p>Срок действия вашей фотогалереи "{{event_name}}" истекает через {{days_remaining}} дней.</p>
+<p>После истечения срока галерея будет архивирована и станет недоступна для гостей.</p>
+<p><a href="{{gallery_link}}">Перейти в галерею</a></p>`,
+        body_text: `Срок действия галереи истекает\n\nУважаемый(ая) {{host_name}},\n\nСрок действия вашей фотогалереи "{{event_name}}" истекает через {{days_remaining}} дней.\n\nГалерея: {{gallery_link}}`,
+      },
+    );
+  }
+
+  // --- gallery_expired ---
+  if (templateMap.gallery_expired) {
+    const id = templateMap.gallery_expired;
+    seedTranslations.push(
+      {
+        template_id: id, language: 'nl',
+        subject: 'Uw fotogalerij {{event_name}} is verlopen',
+        body_html: `<h2>Galerij verlopen</h2>
+<p>Beste {{host_name}},</p>
+<p>Uw fotogalerij "{{event_name}}" is verlopen en niet meer toegankelijk.</p>
+<p>De foto's zijn gearchiveerd. Als u toegang nodig heeft, neem dan contact op met de beheerder via {{admin_email}}.</p>`,
+        body_text: `Galerij verlopen\n\nBeste {{host_name}},\n\nUw fotogalerij "{{event_name}}" is verlopen en niet meer toegankelijk.\n\nNeem contact op met: {{admin_email}}`,
+      },
+      {
+        template_id: id, language: 'pt',
+        subject: 'Sua galeria de fotos {{event_name}} expirou',
+        body_html: `<h2>Galeria expirada</h2>
+<p>Prezado(a) {{host_name}},</p>
+<p>Sua galeria de fotos "{{event_name}}" expirou e não está mais acessível.</p>
+<p>As fotos foram arquivadas. Se precisar de acesso, entre em contato com o administrador em {{admin_email}}.</p>`,
+        body_text: `Galeria expirada\n\nPrezado(a) {{host_name}},\n\nSua galeria de fotos "{{event_name}}" expirou e não está mais acessível.\n\nContato: {{admin_email}}`,
+      },
+      {
+        template_id: id, language: 'ru',
+        subject: 'Срок действия фотогалереи {{event_name}} истёк',
+        body_html: `<h2>Срок действия галереи истёк</h2>
+<p>Уважаемый(ая) {{host_name}},</p>
+<p>Срок действия вашей фотогалереи "{{event_name}}" истёк, и она больше недоступна.</p>
+<p>Фотографии были архивированы. Если вам нужен доступ, свяжитесь с администратором: {{admin_email}}.</p>`,
+        body_text: `Срок действия галереи истёк\n\nУважаемый(ая) {{host_name}},\n\nСрок действия вашей фотогалереи "{{event_name}}" истёк.\n\nКонтакт: {{admin_email}}`,
+      },
+    );
+  }
+
+  // --- archive_complete ---
+  if (templateMap.archive_complete) {
+    const id = templateMap.archive_complete;
+    seedTranslations.push(
+      {
+        template_id: id, language: 'nl',
+        subject: 'Archivering voltooid: {{event_name}}',
+        body_html: `<h2>Archivering voltooid</h2>
+<p>Beste {{host_name}},</p>
+<p>De fotogalerij "{{event_name}}" is succesvol gearchiveerd.</p>
+<p><strong>Archief details:</strong></p>
+<ul>
+  <li>Aantal foto's: {{photo_count}}</li>
+  <li>Archiefgrootte: {{archive_size}}</li>
+  <li>Archiefdatum: {{archive_date}}</li>
+</ul>`,
+        body_text: `Archivering voltooid\n\nBeste {{host_name}},\n\nDe fotogalerij "{{event_name}}" is succesvol gearchiveerd.\n\nAantal foto's: {{photo_count}}\nGrootte: {{archive_size}}`,
+      },
+      {
+        template_id: id, language: 'pt',
+        subject: 'Arquivamento concluído: {{event_name}}',
+        body_html: `<h2>Arquivamento concluído</h2>
+<p>Prezado(a) {{host_name}},</p>
+<p>A galeria de fotos "{{event_name}}" foi arquivada com sucesso.</p>
+<p><strong>Detalhes do arquivo:</strong></p>
+<ul>
+  <li>Número de fotos: {{photo_count}}</li>
+  <li>Tamanho do arquivo: {{archive_size}}</li>
+  <li>Data do arquivamento: {{archive_date}}</li>
+</ul>`,
+        body_text: `Arquivamento concluído\n\nPrezado(a) {{host_name}},\n\nA galeria de fotos "{{event_name}}" foi arquivada com sucesso.\n\nFotos: {{photo_count}}\nTamanho: {{archive_size}}`,
+      },
+      {
+        template_id: id, language: 'ru',
+        subject: 'Архивация завершена: {{event_name}}',
+        body_html: `<h2>Архивация завершена</h2>
+<p>Уважаемый(ая) {{host_name}},</p>
+<p>Фотогалерея "{{event_name}}" была успешно архивирована.</p>
+<p><strong>Детали архива:</strong></p>
+<ul>
+  <li>Количество фото: {{photo_count}}</li>
+  <li>Размер архива: {{archive_size}}</li>
+  <li>Дата архивации: {{archive_date}}</li>
+</ul>`,
+        body_text: `Архивация завершена\n\nУважаемый(ая) {{host_name}},\n\nФотогалерея "{{event_name}}" была успешно архивирована.\n\nФото: {{photo_count}}\nРазмер: {{archive_size}}`,
+      },
+    );
+  }
+
+  // Insert all seed translations
+  const now = new Date();
+  for (const trans of seedTranslations) {
+    trans.created_at = now;
+    trans.updated_at = now;
+    await knex('email_template_translations').insert(trans);
+  }
+
+  console.log(`Seeded ${seedTranslations.length} translations for customer-facing templates`);
+};
+
+exports.down = async function(knex) {
+  await knex.schema.dropTableIfExists('email_template_translations');
+};

backend/src/routes/adminEmail.js

@@ -248,6 +248,58 @@ router.post('/test', adminAuth, requirePermission('email.send'), async (req, res
   }
 });
 
+// Helper: parse variables JSON safely
+function parseVariables(template) {
+  try {
+    if (!template.variables) return [];
+    if (typeof template.variables === 'object') return template.variables;
+    return JSON.parse(template.variables);
+  } catch (e) {
+    console.warn('Failed to parse variables for template:', template.template_key, e.message);
+    return [];
+  }
+}
+
+// Helper: get translations for a template, with legacy column fallback
+async function getTemplateTranslations(templateId, template) {
+  const translations = {};
+  try {
+    const rows = await db('email_template_translations')
+      .where('template_id', templateId)
+      .select('language', 'subject', 'body_html', 'body_text');
+
+    rows.forEach(row => {
+      translations[row.language] = {
+        subject: row.subject || '',
+        body_html: row.body_html || '',
+        body_text: row.body_text || '',
+      };
+    });
+  } catch (error) {
+    // Translations table might not exist yet (pre-migration)
+    // Fall back to legacy columns
+    if (template.subject_en !== undefined) {
+      translations.en = {
+        subject: template.subject_en || '',
+        body_html: template.body_html_en || '',
+        body_text: template.body_text_en || '',
+      };
+      translations.de = {
+        subject: template.subject_de || '',
+        body_html: template.body_html_de || '',
+        body_text: template.body_text_de || '',
+      };
+    } else {
+      translations.en = {
+        subject: template.subject || '',
+        body_html: template.body_html || '',
+        body_text: template.body_text || '',
+      };
+    }
+  }
+  return translations;
+}
+
 // Get email templates
 router.get('/templates', adminAuth, requirePermission('email.view'), async (req, res) => {
   try {
@@ -255,45 +307,17 @@ router.get('/templates', adminAuth, requirePermission('email.view'), async (req,
       .select('*')
       .orderBy('template_key');
 
-    // Parse variables JSON and format for multi-language support
-    const formattedTemplates = templates.map(template => {
-      const result = {
+    const formattedTemplates = [];
+    for (const template of templates) {
+      const translations = await getTemplateTranslations(template.id, template);
+      formattedTemplates.push({
         id: template.id,
         template_key: template.template_key,
-        variables: (() => {
-          try {
-            if (!template.variables) return [];
-            if (typeof template.variables === 'object') return template.variables;
-            return JSON.parse(template.variables);
-          } catch (e) {
-            console.warn('Failed to parse variables for template:', template.template_key, e.message);
-            return [];
-          }
-        })(),
-        updated_at: template.updated_at
-      };
-      
-      // Handle both old and new schema formats
-      if (template.subject_en !== undefined) {
-        // New schema with language columns
-        result.subject_en = template.subject_en;
-        result.body_html_en = template.body_html_en;
-        result.body_text_en = template.body_text_en;
-        result.subject_de = template.subject_de;
-        result.body_html_de = template.body_html_de;
-        result.body_text_de = template.body_text_de;
-      } else {
-        // Old schema - use basic columns for both languages
-        result.subject_en = template.subject;
-        result.body_html_en = template.body_html;
-        result.body_text_en = template.body_text;
-        result.subject_de = template.subject;
-        result.body_html_de = template.body_html;
-        result.body_text_de = template.body_text;
-      }
-      
-      return result;
-    });
+        variables: parseVariables(template),
+        translations,
+        updated_at: template.updated_at,
+      });
+    }
 
     res.json(formattedTemplates);
   } catch (error) {
@@ -313,119 +337,99 @@ router.get('/templates/:key', adminAuth, requirePermission('email.view'), async
       return res.status(404).json({ error: 'Template not found' });
     }
 
-    // Handle both old and new schema formats
-    const response = {
+    const translations = await getTemplateTranslations(template.id, template);
+
+    res.json({
       id: template.id,
       template_key: template.template_key,
-      variables: (() => {
-        try {
-          if (!template.variables) return [];
-          if (typeof template.variables === 'object') return template.variables;
-          return JSON.parse(template.variables);
-        } catch (e) {
-          console.warn('Failed to parse variables for template:', template.template_key, e.message);
-          return [];
-        }
-      })(),
-      updated_at: template.updated_at
-    };
-    
-    // Check which columns exist and use them appropriately
-    if (template.subject_en !== undefined) {
-      // New schema with language columns
-      response.subject_en = template.subject_en;
-      response.body_html_en = template.body_html_en;
-      response.body_text_en = template.body_text_en;
-      response.subject_de = template.subject_de;
-      response.body_html_de = template.body_html_de;
-      response.body_text_de = template.body_text_de;
-    } else {
-      // Old schema - use basic columns for both languages
-      response.subject_en = template.subject;
-      response.body_html_en = template.body_html;
-      response.body_text_en = template.body_text;
-      response.subject_de = template.subject;
-      response.body_html_de = template.body_html;
-      response.body_text_de = template.body_text;
-    }
-    
-    res.json(response);
+      variables: parseVariables(template),
+      translations,
+      updated_at: template.updated_at,
+    });
   } catch (error) {
     console.error('Email template fetch error:', error);
     res.status(500).json({ error: 'Failed to fetch email template' });
   }
 });
 
-// Update email template
+// Update email template translations
 router.put('/templates/:key', [
   adminAuth,
   requirePermission('email.edit'),
-  body('subject_en').optional().notEmpty().withMessage('English subject cannot be empty'),
-  body('subject_de').optional().notEmpty().withMessage('German subject cannot be empty'),
-  body('body_html_en').optional().notEmpty().withMessage('English HTML body cannot be empty'),
-  body('body_html_de').optional().notEmpty().withMessage('German HTML body cannot be empty')
 ], async (req, res) => {
   try {
-    const errors = validationResult(req);
-    if (!errors.isEmpty()) {
-      return res.status(400).json({ errors: errors.array() });
-    }
-
-    const {
-      subject_en, subject_de,
-      body_html_en, body_html_de,
-      body_text_en, body_text_de
-    } = req.body;
-
-    const updateData = {
-      updated_at: new Date()
-    };
-
-    // Check which columns exist in the database
     const template = await db('email_templates')
       .where('template_key', req.params.key)
       .first();
-      
+
     if (!template) {
       return res.status(404).json({ error: 'Template not found' });
     }
 
-    // Determine schema type and update accordingly
-    if (template.subject_en !== undefined) {
-      // New schema with language columns
-      if (subject_en !== undefined) updateData.subject_en = subject_en;
-      if (subject_de !== undefined) updateData.subject_de = subject_de;
-      if (body_html_en !== undefined) updateData.body_html_en = body_html_en;
-      if (body_html_de !== undefined) updateData.body_html_de = body_html_de;
-      if (body_text_en !== undefined) updateData.body_text_en = body_text_en || '';
-      if (body_text_de !== undefined) updateData.body_text_de = body_text_de || '';
-      
-      // Also update basic columns if they exist
-      if (template.subject !== undefined) {
-        updateData.subject = subject_en || updateData.subject_en;
-        updateData.body_html = body_html_en || updateData.body_html_en;
-        updateData.body_text = body_text_en || updateData.body_text_en || '';
-      }
-    } else {
-      // Old schema - only update basic columns
-      if (subject_en !== undefined) {
-        updateData.subject = subject_en;
-        updateData.body_html = body_html_en;
-        updateData.body_text = body_text_en || '';
+    const { translations } = req.body;
+
+    if (!translations || typeof translations !== 'object') {
+      return res.status(400).json({ error: 'translations object is required' });
+    }
+
+    // Upsert each language translation
+    for (const [language, data] of Object.entries(translations)) {
+      if (!data || typeof data !== 'object') continue;
+
+      const existing = await db('email_template_translations')
+        .where({ template_id: template.id, language })
+        .first();
+
+      const row = {
+        subject: data.subject || '',
+        body_html: data.body_html || '',
+        body_text: data.body_text || '',
+        updated_at: new Date(),
+      };
+
+      if (existing) {
+        await db('email_template_translations')
+          .where({ template_id: template.id, language })
+          .update(row);
+      } else {
+        await db('email_template_translations').insert({
+          template_id: template.id,
+          language,
+          ...row,
+          created_at: new Date(),
+        });
       }
     }
 
-    const updated = await db('email_templates')
-      .where('template_key', req.params.key)
-      .update(updateData);
+    // Update timestamp on parent template
+    await db('email_templates')
+      .where('id', template.id)
+      .update({ updated_at: new Date() });
 
-    if (!updated) {
-      return res.status(404).json({ error: 'Template not found' });
+    // Also sync legacy columns for backward compatibility
+    const enData = translations.en;
+    const deData = translations.de;
+    const legacyUpdate = { updated_at: new Date() };
+    const columnInfo = await db('email_templates').columnInfo();
+
+    if (enData && columnInfo.subject_en) {
+      legacyUpdate.subject_en = enData.subject || '';
+      legacyUpdate.body_html_en = enData.body_html || '';
+      legacyUpdate.body_text_en = enData.body_text || '';
     }
+    if (deData && columnInfo.subject_de) {
+      legacyUpdate.subject_de = deData.subject || '';
+      legacyUpdate.body_html_de = deData.body_html || '';
+      legacyUpdate.body_text_de = deData.body_text || '';
+    }
+
+    await db('email_templates')
+      .where('id', template.id)
+      .update(legacyUpdate);
 
     // Log activity
     await logActivity('email_template_updated',
-      { template_key: req.params.key },
+      { template_key: req.params.key, languages: Object.keys(translations) },
       null,
       { type: 'admin', id: req.admin.id, name: req.admin.username }
     );
@@ -449,16 +453,40 @@ router.post('/templates/:key/preview', adminAuth, requirePermission('email.view'
     }
 
     const { preview_data, language = 'en' } = req.body;
-    
-    // Get the appropriate language version
-    const subjectField = language === 'de' && template.subject_de ? 'subject_de' : 'subject_en';
-    const htmlField = language === 'de' && template.body_html_de ? 'body_html_de' : 'body_html_en';
-    const textField = language === 'de' && template.body_text_de ? 'body_text_de' : 'body_text_en';
-    
-    // Handle backward compatibility
-    let htmlContent = template[htmlField] || template.body_html || '';
-    let textContent = template[textField] || template.body_text || '';
-    let subject = template[subjectField] || template.subject || '';
+
+    // Get translation from translations table with fallback
+    let translation = null;
+    try {
+      translation = await db('email_template_translations')
+        .where({ template_id: template.id, language })
+        .first();
+
+      if (!translation && language !== 'en') {
+        translation = await db('email_template_translations')
+          .where({ template_id: template.id, language: 'en' })
+          .first();
+      }
+    } catch (e) {
+      // Fallback to legacy columns
+    }
+
+    let subject = '';
+    let htmlContent = '';
+    let textContent = '';
+
+    if (translation) {
+      subject = translation.subject || '';
+      htmlContent = translation.body_html || '';
+      textContent = translation.body_text || '';
+    } else {
+      // Legacy column fallback
+      const subjectField = language === 'de' && template.subject_de ? 'subject_de' : 'subject_en';
+      const htmlField = language === 'de' && template.body_html_de ? 'body_html_de' : 'body_html_en';
+      const textField = language === 'de' && template.body_text_de ? 'body_text_de' : 'body_text_en';
+      subject = template[subjectField] || template.subject || '';
+      htmlContent = template[htmlField] || template.body_html || '';
+      textContent = template[textField] || template.body_text || '';
+    }
 
     if (preview_data) {
       const escapeHtml = (str) => String(str)
@@ -472,7 +500,7 @@ router.post('/templates/:key/preview', adminAuth, requirePermission('email.view'
         const regex = new RegExp(`{{${key}}}`, 'g');
         const escapedValue = escapeHtml(preview_data[key]);
         htmlContent = htmlContent.replace(regex, escapedValue);
-        textContent = textContent.replace(regex, preview_data[key]); // text doesn't need HTML escaping
+        textContent = textContent.replace(regex, preview_data[key]);
         subject = subject.replace(regex, escapeHtml(preview_data[key]));
       });
     }

backend/src/services/emailProcessor.js

@@ -99,15 +99,22 @@ async function getRecipientLanguage(email, eventId = null) {
     logger.error('Error fetching email config language:', error);
   }
   
-  // Fourth priority: Check if the email domain suggests German
+  // Fourth priority: Check if the email domain suggests a language
   if (email) {
-    const germanDomains = ['.de', '.at', '.ch', '.li'];
     const domain = email.toLowerCase();
-    if (germanDomains.some(d => domain.endsWith(d))) {
-      return 'de';
+    const domainLanguageMap = [
+      { domains: ['.de', '.at', '.ch', '.li'], language: 'de' },
+      { domains: ['.nl', '.be'], language: 'nl' },
+      { domains: ['.br', '.pt'], language: 'pt' },
+      { domains: ['.ru', '.su'], language: 'ru' },
+    ];
+    for (const { domains, language: lang } of domainLanguageMap) {
+      if (domains.some(d => domain.endsWith(d))) {
+        return lang;
+      }
     }
   }
-  
+
   return 'en'; // Default to English
 }
 
@@ -300,30 +307,73 @@ async function processTemplate(template, variables, language = 'en') {
   const { formatDate } = require('../utils/dateFormatter');
   const { formatWelcomeMessage } = require('../utils/formatters');
 
-  // Get the appropriate language fields
-  const subjectField = language === 'de' ? 'subject_de' : 'subject_en';
-  const htmlField = language === 'de' ? 'body_html_de' : 'body_html_en';
-  const textField = language === 'de' ? 'body_text_de' : 'body_text_en';
+  // Get translation from email_template_translations table with fallback chain
+  let subject = '';
+  let htmlBody = '';
+  let textBody = '';
 
-  // Fall back to non-language-specific fields for backward compatibility
-  let subject = template[subjectField] || template.subject || '';
-  let htmlBody = template[htmlField] || template.body_html || '';
-  let textBody = template[textField] || template.body_text || '';
+  try {
+    // Try requested language first, then English, then any available
+    let translation = await db('email_template_translations')
+      .where({ template_id: template.id, language })
+      .first();
+
+    if (!translation && language !== 'en') {
+      translation = await db('email_template_translations')
+        .where({ template_id: template.id, language: 'en' })
+        .first();
+    }
+
+    if (!translation) {
+      translation = await db('email_template_translations')
+        .where({ template_id: template.id })
+        .first();
+    }
+
+    if (translation) {
+      subject = translation.subject || '';
+      htmlBody = translation.body_html || '';
+      textBody = translation.body_text || '';
+    }
+  } catch (error) {
+    logger.warn('email_template_translations table not available, falling back to columns:', error.message);
+  }
+
+  // Fallback to legacy column-based fields if no translation found
+  if (!subject && !htmlBody) {
+    const subjectField = language === 'de' ? 'subject_de' : 'subject_en';
+    const htmlField = language === 'de' ? 'body_html_de' : 'body_html_en';
+    const textField = language === 'de' ? 'body_text_de' : 'body_text_en';
+    subject = template[subjectField] || template.subject_en || template.subject || '';
+    htmlBody = template[htmlField] || template.body_html_en || template.body_html || '';
+    textBody = template[textField] || template.body_text_en || template.body_text || '';
+  }
 
   // Process variables before template compilation
   const processedVariables = { ...variables };
 
   // Handle password security message
+  const passwordSecurityI18n = {
+    en: '(Not shown for security reasons)',
+    de: '(Aus Sicherheitsgründen nicht angezeigt)',
+    nl: '(Om veiligheidsredenen niet weergegeven)',
+    pt: '(Não exibido por motivos de segurança)',
+    ru: '(Не показано в целях безопасности)',
+  };
+  const noPasswordI18n = {
+    en: 'No password required',
+    de: 'Kein Passwort erforderlich',
+    nl: 'Geen wachtwoord vereist',
+    pt: 'Nenhuma senha necessária',
+    ru: 'Пароль не требуется',
+  };
+
   if (processedVariables.gallery_password === '{{password_security_message}}') {
-    processedVariables.gallery_password = language === 'de'
-      ? '(Aus Sicherheitsgründen nicht angezeigt)'
-      : '(Not shown for security reasons)';
+    processedVariables.gallery_password = passwordSecurityI18n[language] || passwordSecurityI18n.en;
   }
 
   if (processedVariables.gallery_password === 'No password required') {
-    processedVariables.gallery_password = language === 'de'
-      ? 'Kein Passwort erforderlich'
-      : 'No password required';
+    processedVariables.gallery_password = noPasswordI18n[language] || noPasswordI18n.en;
   }
 
   // Format dates if they exist
@@ -371,6 +421,12 @@ async function processTemplate(template, variables, language = 'en') {
         link: 'Открыть доступ клиента',
         warning: 'Не делитесь этой ссылкой — она позволяет скрывать фотографии из гостевой галереи.',
       },
+      nl: {
+        label: 'Klanttoegang (Privé)',
+        desc: 'Bekijk en beheer de zichtbaarheid van foto\'s voordat u deelt met gasten:',
+        link: 'Klanttoegang openen',
+        warning: 'Deel deze link niet — hiermee kunnen foto\'s worden verborgen in de gastengalerij.',
+      },
       pt: {
         label: 'Acesso do Cliente (Privado)',
         desc: 'Revise e gerencie a visibilidade das fotos antes de compartilhar com os convidados:',