Taskmaster

/** * @fileoverview Extract JSON from MCP response, handling markdown blocks and other formatting */ /** * Extract JSON from MCP AI response * @param {string} text - The text to extract JSON from * @returns {string} - The extracted JSON string */ export function extractJson(text) { // Remove markdown code blocks if present let jsonText = text.trim(); // Remove ```json blocks jsonText = jsonText.replace(/^```json\s*/gm, ''); jsonText = jsonText.replace(/^```\s*/gm, ''); jsonText = jsonText.replace(/```\s*$/gm, ''); // Remove common TypeScript/JavaScript patterns jsonText = jsonText.replace(/^const\s+\w+\s*=\s*/, ''); // Remove "const varName = " jsonText = jsonText.replace(/^let\s+\w+\s*=\s*/, ''); // Remove "let varName = " jsonText = jsonText.replace(/^var\s+\w+\s*=\s*/, ''); // Remove "var varName = " jsonText = jsonText.replace(/;?\s*$/, ''); // Remove trailing semicolons // Remove explanatory text before JSON (common with AI responses) jsonText = jsonText.replace(/^.*?(?=\{|\[)/s, ''); // Remove explanatory text after JSON const lines = jsonText.split('\n'); let jsonEndIndex = -1; let braceCount = 0; let inString = false; let escapeNext = false; // Find the end of the JSON by tracking braces for (let i = 0; i < jsonText.length; i++) { const char = jsonText[i]; if (escapeNext) { escapeNext = false; continue; } if (char === '\\') { escapeNext = true; continue; } if (char === '"' && !escapeNext) { inString = !inString; continue; } if (!inString) { if (char === '{' || char === '[') { braceCount++; } else if (char === '}' || char === ']') { braceCount--; if (braceCount === 0) { jsonEndIndex = i; break; } } } } if (jsonEndIndex > -1) { jsonText = jsonText.substring(0, jsonEndIndex + 1); } // Try to extract JSON object or array if previous method didn't work if (jsonEndIndex === -1) { const objectMatch = jsonText.match(/{[\s\S]*}/); const arrayMatch = jsonText.match(/\[[\s\S]*\]/); if (objectMatch) { jsonText = objectMatch[0]; } else if (arrayMatch) { jsonText = arrayMatch[0]; } } // First try to parse as valid JSON try { JSON.parse(jsonText); return jsonText; } catch { // If it's not valid JSON, it might be a JavaScript object literal // Try to convert it to valid JSON try { // This is a simple conversion that handles basic cases // Replace unquoted keys with quoted keys const converted = jsonText .replace(/([{,]\s*)([a-zA-Z_$][a-zA-Z0-9_$]*)\s*:/g, '$1"$2":') // Replace single quotes with double quotes .replace(/'/g, '"') // Handle trailing commas .replace(/,\s*([}\]])/g, '$1'); // Validate the converted JSON JSON.parse(converted); return converted; } catch { // If all else fails, return the original text // The calling code will handle the error appropriately return text; } } }