@langchain/core/dist/utils/json.js

Core LangChain.js abstractions and schemas

//#region src/utils/json.ts
function parseJsonMarkdown(s, parser = parsePartialJson) {
	s = s.trim();
	const firstFenceIndex = s.indexOf("```");
	if (firstFenceIndex === -1) return parser(s);
	let contentAfterFence = s.substring(firstFenceIndex + 3);
	if (contentAfterFence.startsWith("json\n")) contentAfterFence = contentAfterFence.substring(5);
	else if (contentAfterFence.startsWith("json")) contentAfterFence = contentAfterFence.substring(4);
	else if (contentAfterFence.startsWith("\n")) contentAfterFence = contentAfterFence.substring(1);
	const closingFenceIndex = contentAfterFence.indexOf("```");
	let finalContent = contentAfterFence;
	if (closingFenceIndex !== -1) finalContent = contentAfterFence.substring(0, closingFenceIndex);
	return parser(finalContent.trim());
}
function parsePartialJson(s) {
	if (typeof s === "undefined") return null;
	try {
		return JSON.parse(s);
	} catch {}
	let new_s = "";
	const stack = [];
	let isInsideString = false;
	let escaped = false;
	for (let char of s) {
		if (isInsideString) if (char === "\"" && !escaped) isInsideString = false;
		else if (char === "\n" && !escaped) char = "\\n";
		else if (char === "\\") escaped = !escaped;
		else escaped = false;
		else if (char === "\"") {
			isInsideString = true;
			escaped = false;
		} else if (char === "{") stack.push("}");
		else if (char === "[") stack.push("]");
		else if (char === "}" || char === "]") if (stack && stack[stack.length - 1] === char) stack.pop();
		else return null;
		new_s += char;
	}
	if (isInsideString) new_s += "\"";
	for (let i = stack.length - 1; i >= 0; i -= 1) new_s += stack[i];
	try {
		return JSON.parse(new_s);
	} catch {
		return null;
	}
}

//#endregion
export { parseJsonMarkdown, parsePartialJson };
//# sourceMappingURL=json.js.map