utils.js

// Shared utility functions for Claude Exporter

// Helper function to reconstruct the current branch from the message tree
function getCurrentBranch(data) {
  if (!data.chat_messages || !data.current_leaf_message_uuid) {
    return [];
  }
  
  // Create a map of UUID to message for quick lookup
  const messageMap = new Map();
  data.chat_messages.forEach(msg => {
    messageMap.set(msg.uuid, msg);
  });
  
  // Trace back from the current leaf to the root
  const branch = [];
  let currentUuid = data.current_leaf_message_uuid;
  
  while (currentUuid && messageMap.has(currentUuid)) {
    const message = messageMap.get(currentUuid);
    branch.unshift(message); // Add to beginning to maintain order
    currentUuid = message.parent_message_uuid;
    
    // Stop if we hit the root (parent UUID that doesn't exist in our messages)
    if (!messageMap.has(currentUuid)) {
      break;
    }
  }
  
  return branch;
}

// Convert to markdown format
function convertToMarkdown(data, includeMetadata) {
  let markdown = `# ${data.name || 'Untitled Conversation'}\n\n`;
  
  if (includeMetadata) {
    markdown += `**Created:** ${new Date(data.created_at).toLocaleString()}\n`;
    markdown += `**Updated:** ${new Date(data.updated_at).toLocaleString()}\n`;
    markdown += `**Model:** ${data.model}\n\n`;
    markdown += '---\n\n';
  }
  
  // Get only the current branch messages
  const branchMessages = getCurrentBranch(data);
  
  for (const message of branchMessages) {
    const sender = message.sender === 'human' ? '**You**' : '**Claude**';
    markdown += `${sender}:\n\n`;
    
    if (message.content) {
      for (const content of message.content) {
        if (content.text) {
          markdown += `${content.text}\n\n`;
        }
      }
    } else if (message.text) {
      markdown += `${message.text}\n\n`;
    }
    
    if (includeMetadata && message.created_at) {
      markdown += `*${new Date(message.created_at).toLocaleString()}*\n\n`;
    }
    
    markdown += '---\n\n';
  }
  
  return markdown;
}

// Convert to plain text
function convertToText(data, includeMetadata) {
  let text = '';
  
  // Add metadata header if requested
  if (includeMetadata) {
    text += `${data.name || 'Untitled Conversation'}\n`;
    text += `Created: ${new Date(data.created_at).toLocaleString()}\n`;
    text += `Updated: ${new Date(data.updated_at).toLocaleString()}\n`;
    text += `Model: ${data.model}\n\n`;
    text += '---\n\n';
  }
  
  // Get only the current branch messages
  const branchMessages = getCurrentBranch(data);
  
  // Use simplified format
  let humanSeen = false;
  let assistantSeen = false;
  
  branchMessages.forEach((message) => {
    // Get the message text
    let messageText = '';
    if (message.content) {
      for (const content of message.content) {
        if (content.text) {
          messageText += content.text;
        }
      }
    } else if (message.text) {
      messageText = message.text;
    }
    
    // Use full label on first occurrence, then abbreviate
    let senderLabel;
    if (message.sender === 'human') {
      senderLabel = humanSeen ? 'H' : 'Human';
      humanSeen = true;
    } else {
      senderLabel = assistantSeen ? 'A' : 'Assistant';
      assistantSeen = true;
    }
    
    text += `${senderLabel}: ${messageText}\n\n`;
  });
  
  return text.trim();
}

// Download file utility
function downloadFile(content, filename, type = 'application/json') {
  const blob = new Blob([content], { type });
  const url = URL.createObjectURL(blob);
  const a = document.createElement('a');
  a.href = url;
  a.download = filename;
  document.body.appendChild(a);
  a.click();
  document.body.removeChild(a);
  URL.revokeObjectURL(url);
}

// Functions are available globally in the browser context
// No need for module.exports in browser extensions