simplenote-web/public/js/views/document.js

// Document View

import { api } from '../api.js';

export async function renderDocument(app) {
  const { id } = app.state.params;
  let doc;
  
  try {
    doc = await api.getDocument(id);
  } catch (e) {
    app.showToast('Failed to load document', 'error');
    app.navigate('dashboard');
    return;
  }

  const appEl = document.getElementById('app');
  
  function render() {
    const priorityEmoji = { high: '🔴', medium: '🟡', low: '🟢' };
    const priority = doc.priority || 'medium';
    const renderedContent = renderMarkdown(doc.content || '');

    appEl.innerHTML = `
      <header class="app-header">
        <button class="btn btn-ghost" onclick="window.app.navigate('dashboard')">← Back</button>
        <div class="header-actions">
          <button class="btn btn-ghost" onclick="window.app.navigate('editor', {id: '${doc.id}'})">✏️ Edit</button>
          <button class="btn btn-ghost" onclick="exportDoc()">📥 Export</button>
          <button class="btn btn-ghost danger" onclick="deleteDoc()">🗑️ Delete</button>
        </div>
      </header>
      <main class="main-content">
        <div class="content-body">
          <div class="doc-viewer">
            <div class="doc-content">
              <div class="doc-viewer-header">
                <span class="doc-id">${doc.id}</span>
                <span class="type-badge ${doc.type || 'general'}">${doc.type || 'general'}</span>
              </div>
              <div class="prose">${renderedContent}</div>
            </div>
            <aside class="doc-sidebar">
              <div class="meta-section">
                <div class="meta-header">Details</div>
                <div class="meta-body">
                  <div class="meta-row">
                    <span class="meta-label">Status</span>
                    <span class="status-badge ${doc.status || 'draft'}">${doc.status || 'draft'}</span>
                  </div>
                  <div class="meta-row">
                    <span class="meta-label">Priority</span>
                    <span class="meta-value">${priorityEmoji[priority]} ${priority}</span>
                  </div>
                  <div class="meta-row">
                    <span class="meta-label">Author</span>
                    <span class="meta-value">${escapeHtml(doc.author || 'unknown')}</span>
                  </div>
                  <div class="meta-row">
                    <span class="meta-label">Created</span>
                    <span class="meta-value">${formatDate(doc.createdAt)}</span>
                  </div>
                  <div class="meta-row">
                    <span class="meta-label">Updated</span>
                    <span class="meta-value">${formatDate(doc.updatedAt)}</span>
                  </div>
                </div>
              </div>
              ${doc.tags && doc.tags.length ? `
                <div class="meta-section">
                  <div class="meta-header">Tags</div>
                  <div class="meta-body doc-tags">
                    ${doc.tags.map(t => `<span class="tag-pill" onclick="filterByTag('${escapeHtml(t)}')">${escapeHtml(t)}</span>`).join('')}
                  </div>
                </div>
              ` : ''}
            </aside>
          </div>
        </div>
      </main>
    `;

    window.filterByTag = (tag) => {
      // Store the tag to filter by in app state so dashboard can pick it up
      app.state.selectedTag = tag;
      app.state.selectedLibrary = null;
      app.navigate('dashboard');
    };
  }

  render();

  async function exportDoc() {
    try {
      const markdown = await api.exportDocument(id);
      const blob = new Blob([markdown], { type: 'text/markdown' });
      const url = URL.createObjectURL(blob);
      const a = document.createElement('a');
      a.href = url;
      // Sanitize filename to prevent path traversal
      const safeFilename = (doc.title || 'untitled')
        .replace(/[^a-zA-Z0-9_\-\s]/g, '')
        .replace(/\s+/g, '-')
        .substring(0, 100);
      a.download = `${doc.id}-${safeFilename}.md`;
      a.click();
      URL.revokeObjectURL(url);
      app.showToast('Document exported', 'success');
    } catch (e) {
      app.showToast('Failed to export', 'error');
    }
  }

  async function deleteDoc() {
    const confirmed = await app.confirmDelete(`Delete "${doc.title}"? This cannot be undone.`);
    if (confirmed) {
      try {
        await api.deleteDocument(id);
        app.showToast('Document deleted', 'success');
        app.navigate('dashboard');
      } catch (e) {
        app.showToast('Failed to delete', 'error');
      }
    }
  }
}

function escapeHtml(str) {
  if (!str) return '';
  const div = document.createElement('div');
  div.textContent = str;
  return div.innerHTML;
}

function formatDate(dateStr) {
  if (!dateStr) return '';
  const date = new Date(dateStr);
  return date.toLocaleDateString('en-US', { month: 'short', day: 'numeric', year: 'numeric' });
}

function renderMarkdown(content) {
  // Simple markdown rendering using marked library if available
  if (typeof marked !== 'undefined') {
    return marked.parse(content);
  }
  
  // Fallback simple rendering
  return content
    .replace(/^### (.+)$/gm, '<h3>$1</h3>')
    .replace(/^## (.+)$/gm, '<h2>$1</h2>')
    .replace(/^# (.+)$/gm, '<h1>$1</h1>')
    .replace(/\*\*(.+?)\*\*/g, '<strong>$1</strong>')
    .replace(/\*(.+?)\*/g, '<em>$1</em>')
    .replace(/`(.+?)`/g, '<code>$1</code>')
    .replace(/^- (.+)$/gm, '<li>$1</li>')
    .replace(/(<li>.*<\/li>)/s, '<ul>$1</ul>')
    .replace(/\n\n/g, '</p><p>')
    .replace(/^(.+)$/gm, (match) => {
      if (match.startsWith('<')) return match;
      return `<p>${match}</p>`;
    });
}