dynamoose-utils/lib/wildcard_allowed_check.ts

Dynamoose is a modeling tool for Amazon's DynamoDB (inspired by Mongoose)

export default (saveUnknown: string[] | boolean, checkKey: string, settings = {"splitString": ".", "prefixesDisallowed": true}): boolean => {
	if (Array.isArray(saveUnknown)) {
		return Boolean(saveUnknown.find((key) => {
			const keyParts = key.split(settings.splitString);
			const checkKeyParts = checkKey.split(settings.splitString);
			let index = 0, keyPart = keyParts[0];
			for (let i = 0; i < checkKeyParts.length; i++) {
				if (keyPart === "**") {
					return true;
				}
				if (keyPart !== "*" && checkKeyParts[i] !== keyPart) {
					return false;
				}
				keyPart = keyParts[++index];
			}
			if (!settings.prefixesDisallowed && keyPart) {
				return false;
			}
			return true;
		}));
	} else {
		return saveUnknown;
	}
};