const { replacementRegex, replaceInObject } = require('./shared');

class RequestCache {
	constructor() {
		this.$cache = {};
	}

	exists(key) {
		return typeof this.$cache[key] !== 'undefined';
	}

	add(key, value) {
		this.$cache[key] = value;
	}

	get(path) {
		let result = this.$cache;
		path.split('.').forEach(part => {
			if (result[part] === undefined) {
				throw new Error(`${path} not found in cache.`);
			}

			result = result[part];
		});

		return result;
	}

	parse(item) {
		if (item === null) {
			return null;
		}

		return replaceInObject(item, item => {
			return item.replace(replacementRegex, (match, key) => {
				if (match.startsWith('\\')) {
					return match.replace('\\$', '$');
				}

				return this.get(key);
			});
		});
	}
}

module.exports = RequestCache;