Initial Product release

src/data/slides.js

@@ -0,0 +1,158 @@
+const { fetchTemplateById } = require('./templates');
+const { parseJsonSafe } = require('./utils');
+
+const ALLOWED_RICH_TEXT_TAGS = ['b', 'strong', 'i', 'em', 'u', 'br', 'p', 'div', 'ul', 'ol', 'li'];
+
+function sanitizeRichText(html) {
+  let output = String(html || '');
+  output = output.replace(/<script[\s\S]*?<\/script>/gi, '');
+  output = output.replace(/<style[\s\S]*?<\/style>/gi, '');
+  return output.replace(/<[^>]+>/g, (tag) => {
+    const match = tag.match(/^<\s*(\/?)\s*([a-z0-9]+)(?:\s[^>]*)?>$/i);
+    if (!match) {
+      return '';
+    }
+    const closing = Boolean(match[1]);
+    const name = String(match[2] || '').toLowerCase();
+    if (!ALLOWED_RICH_TEXT_TAGS.includes(name)) {
+      return '';
+    }
+    if (name === 'br') {
+      return '<br>';
+    }
+    return closing ? `</${name}>` : `<${name}>`;
+  });
+}
+
+async function fetchSlideById(pool, id) {
+  const [slides] = await pool.query(`
+    SELECT s.id, s.title, s.body, s.template_id, s.content_json, s.media_path, s.media_type, s.created_at, s.modified_at,
+           st.name AS template_name, cs.name AS canvas_size_name, cs.width AS canvas_width, cs.height AS canvas_height
+    FROM slides s
+    LEFT JOIN slide_templates st ON st.id = s.template_id
+    LEFT JOIN canvas_sizes cs ON cs.id = st.canvas_size_id
+    WHERE s.id = ?
+  `, [id]);
+  if (!slides.length) {
+    return null;
+  }
+  const slide = slides[0];
+  slide.content = parseJsonSafe(slide.content_json) || {};
+  if (slide.template_id) {
+    slide.template = await fetchTemplateById(pool, slide.template_id);
+  }
+  return slide;
+}
+
+function getFilesByField(files) {
+  const map = {};
+  (files || []).forEach((file) => {
+    map[file.fieldname] = file;
+  });
+  return map;
+}
+
+function sanitizeTextColor(value, fallback) {
+  const raw = String(value || '').trim();
+  if (/^#[0-9a-fA-F]{6}$/.test(raw) || /^#[0-9a-fA-F]{3}$/.test(raw)) {
+    return raw;
+  }
+  return fallback || '#000000';
+}
+
+function getTextRegionStyle(body, region, existingContent) {
+  const existing = existingContent && existingContent[region.region_key] ? existingContent[region.region_key] : {};
+  const fontFamily = String(body[`region_font_family_${region.id}`] || existing.font_family || region.font_family || 'Arial').trim() || 'Arial';
+  const fontSize = Math.max(8, Number(body[`region_font_size_${region.id}`] || existing.font_size || 24));
+  const fontColor = sanitizeTextColor(body[`region_font_color_${region.id}`] || existing.font_color || region.font_color || '#000000');
+  return {
+    font_family: fontFamily,
+    font_size: fontSize,
+    font_color: fontColor
+  };
+}
+
+function buildTemplateContent(template, body, filesByField, existingContent) {
+  const content = {};
+  template.regions.forEach((region) => {
+    if (region.region_type === 'image') {
+      const uploaded = filesByField[`region_image_${region.id}`];
+      const existing = body[`existing_region_image_${region.id}`];
+      content[region.region_key] = {
+        type: 'image',
+        value: uploaded ? `/uploads/${uploaded.filename}` : String(existing || '').trim() || ((existingContent && existingContent[region.region_key]) ? existingContent[region.region_key].value : '')
+      };
+    } else if (region.region_type === 'webpage') {
+      const submitted = body[`region_webpage_${region.id}`];
+      const current = existingContent && existingContent[region.region_key] ? existingContent[region.region_key].value : '';
+      content[region.region_key] = {
+        type: 'webpage',
+        value: submitted === undefined ? current : String(submitted || '').trim()
+      };
+    } else if (region.region_type === 'html') {
+      const submitted = body[`region_html_${region.id}`];
+      const current = existingContent && existingContent[region.region_key] ? existingContent[region.region_key].value : '';
+      content[region.region_key] = {
+        type: 'html',
+        value: submitted === undefined ? current : String(submitted || '')
+      };
+    } else {
+      const submitted = body[`region_text_${region.id}`];
+      const current = existingContent && existingContent[region.region_key] ? existingContent[region.region_key].value : '';
+      const style = getTextRegionStyle(body, region, existingContent);
+      content[region.region_key] = {
+        type: 'text',
+        value: submitted === undefined ? current : String(submitted),
+        font_family: style.font_family,
+        font_size: style.font_size,
+        font_color: style.font_color
+      };
+    }
+  });
+  return content;
+}
+
+async function buildSlidePayload(pool, req, existingSlide) {
+  const title = String(req.body.title || '').trim();
+  const templateId = req.body.template_id ? Number(req.body.template_id) : null;
+  const filesByField = getFilesByField(req.files || []);
+  const template = templateId ? await fetchTemplateById(pool, templateId) : null;
+  const existingContent = existingSlide ? parseJsonSafe(existingSlide.content_json) || {} : {};
+
+  if (!title) {
+    const error = new Error('Slide title is required.');
+    error.statusCode = 400;
+    throw error;
+  }
+
+  if (templateId && !template) {
+    const error = new Error('Template not found.');
+    error.statusCode = 400;
+    throw error;
+  }
+
+  if (template) {
+    return {
+      title,
+      body: existingSlide ? existingSlide.body : null,
+      templateId: template.id,
+      contentJson: JSON.stringify(buildTemplateContent(template, req.body, filesByField, existingContent)),
+      mediaPath: null,
+      mediaType: null
+    };
+  }
+
+  return {
+    title,
+    body: existingSlide ? existingSlide.body : null,
+    templateId: null,
+    contentJson: existingSlide ? existingSlide.content_json : null,
+    mediaPath: existingSlide ? existingSlide.media_path : null,
+    mediaType: existingSlide ? existingSlide.media_type : null
+  };
+}
+
+module.exports = {
+  fetchSlideById,
+  buildSlidePayload
+};