export function parseSetCookieHeader()

in packages/better-auth/src/cookies/cookie-utils.ts [13:75]
53 lines of code
16 McCabe index (conditional complexity)

export function parseSetCookieHeader(
	setCookie: string,
): Map<string, CookieAttributes> {
	const cookies = new Map<string, CookieAttributes>();
	const cookieArray = setCookie.split(", ");

	cookieArray.forEach((cookieString) => {
		const parts = cookieString.split(";").map((part) => part.trim());
		const [nameValue, ...attributes] = parts;
		const [name, ...valueParts] = nameValue.split("=");

		const value = valueParts.join("=");

		if (!name || value === undefined) {
			return;
		}

		const attrObj: CookieAttributes = { value };

		attributes.forEach((attribute) => {
			const [attrName, ...attrValueParts] = attribute.split("=");
			const attrValue = attrValueParts.join("=");

			const normalizedAttrName = attrName.trim().toLowerCase();

			switch (normalizedAttrName) {
				case "max-age":
					attrObj["max-age"] = attrValue
						? parseInt(attrValue.trim(), 10)
						: undefined;
					break;
				case "expires":
					attrObj.expires = attrValue ? new Date(attrValue.trim()) : undefined;
					break;
				case "domain":
					attrObj.domain = attrValue ? attrValue.trim() : undefined;
					break;
				case "path":
					attrObj.path = attrValue ? attrValue.trim() : undefined;
					break;
				case "secure":
					attrObj.secure = true;
					break;
				case "httponly":
					attrObj.httponly = true;
					break;
				case "samesite":
					attrObj.samesite = attrValue
						? (attrValue.trim().toLowerCase() as "strict" | "lax" | "none")
						: undefined;
					break;
				default:
					// Handle any other attributes
					attrObj[normalizedAttrName] = attrValue ? attrValue.trim() : true;
					break;
			}
		});

		cookies.set(name, attrObj);
	});

	return cookies;
}