Beer+API.swift

// REQUEST OFFLINE
extension Beer {
    
    public static func getBeerListOffline(completion: @escaping (_ beerList: [Beer], _ error: Error?) -> Void) {
        
        guard let filePath = Bundle.main.url(forResource: "beer",
                                             withExtension: "json") else {
            completion([], AppError.fileNotFound)
            return
        }

        do {
            let data = try Data.init(contentsOf: filePath)
            let json = try JSON(data: data)
            let list: [Beer] = try json.arrayValue.map { try Beer.parse($0) }
            completion(list, nil)
        } catch {
            completion([], error)
        }
    }
}