Function extractFirstJsonObject

packages/shared/src/json.ts:18–47

(text: string)

 * that inner object.
 */
export function extractFirstJsonObject(text: string): unknown {
  const start = text.indexOf("{");
  if (start === -1) return undefined;

  let depth = 0;
  let inString = false;
  let escaped = false;
  for (let i = start; i < text.length; i++) {
    const ch = text[i];
    if (inString) {
      if (escaped) escaped = false;
      else if (ch === "\\") escaped = true;
      else if (ch === '"') inString = false;
      continue;
    }
    if (ch === '"') inString = true;
    else if (ch === "{") depth++;
    else if (ch === "}") {
      depth--;
      if (depth === 0) {
        try {
          return JSON.parse(text.slice(start, i + 1));
        } catch {
          return undefined;
        }
      }
    }
  }
  return undefined;
}