JSON से CSV कनवर्टर - JSON ऐरे को CSV में बदलें ऑनलाइन

// JSON Array to CSV Converter (Client-side, no dependencies)

function flattenObject(obj, prefix = "") {
  const result = {};
  for (const [key, value] of Object.entries(obj)) {
    const fullKey = prefix ? `${prefix}.${key}` : key;
    if (value !== null && typeof value === "object" && !Array.isArray(value)) {
      Object.assign(result, flattenObject(value, fullKey));
    } else {
      result[fullKey] = value;
    }
  }
  return result;
}

function escapeField(value, delimiter = ",") {
  if (value === null || value === undefined) return "";
  const str = typeof value === "object" ? JSON.stringify(value) : String(value);
  if (str.includes(delimiter) || str.includes('"') || str.includes("\n")) {
    return `"${str.replace(/"/g, '""')}"`;
  }
  return str;
}

function jsonToCsv(jsonArray, options = {}) {
  const { delimiter = ",", includeHeader = true, flatten = true } = options;
  const rows = flatten ? jsonArray.map(item => flattenObject(item)) : jsonArray;
  const headerSet = new Set();
  rows.forEach(row => Object.keys(row).forEach(key => headerSet.add(key)));
  const headers = Array.from(headerSet);
  const lines = [];
  if (includeHeader) {
    lines.push(headers.map(h => escapeField(h, delimiter)).join(delimiter));
  }
  for (const row of rows) {
    lines.push(headers.map(h => escapeField(row[h], delimiter)).join(delimiter));
  }
  return lines.join("\n");
}

// Example usage
const data = [
  { name: "Alice", age: 30, address: { city: "Seoul" } },
  { name: "Bob", age: 25, address: { city: "Tokyo" } }
];
console.log(jsonToCsv(data));
// name,age,address.city
// Alice,30,Seoul
// Bob,25,Tokyo