mas/mas-cli/Error.swift

//
//  Error.swift
//  mas-cli
//
//  Created by Andrew Naylor on 21/08/2015.
//  Copyright (c) 2015 Andrew Naylor. All rights reserved.
//

enum MASError: Error, CustomStringConvertible {
    case notSignedIn
    case signInFailed(error: NSError?)
    case alreadySignedIn
    
    case purchaseFailed(error: NSError?)
    case downloadFailed(error: NSError?)
    case noDownloads
    case cancelled
    
    case searchFailed
    case noSearchResultsFound
    
    var description: String {
        switch self {
        case .notSignedIn:
            return "Not signed in"
            
        case .signInFailed(error: let error):
            if let error = error {
                return "Sign in failed: \(error.localizedDescription)"
            } else {
                return "Sign in failed"
            }
            
        case .alreadySignedIn:
            return "Already signed in"
            
        case .purchaseFailed(error: let error):
            if let error = error {
                return "Download request failed: \(error.localizedDescription)"
            } else {
                return "Download request failed"
            }
        case .downloadFailed(error: let error):
            if let error = error {
                return "Download failed: \(error.localizedDescription)"
            } else {
                return "Download failed"
            }
            
        case .noDownloads:
            return "No downloads began"
        
        case .cancelled:
            return "Download cancelled"
            
        case .searchFailed:
            return "Search failed"
            
        case .noSearchResultsFound:
            return "No results found"            
        }
    }
}