0001    //
0002    //  Input.swift
0003    //  Example
0004    //
0005    //  Created by Jake Heiser on 8/17/14.
0006    //  Copyright (c) 2014 jakeheis. All rights reserved.
0007    //
0008    
0009    import Foundation
0010    
0011    public class Input
CLI.swift:45
        Input.checkForPipedData() {
0012        
0013        private static let inputHandle
Input.swift:35
        var input = String(data: inputHandle.availableData, encoding: NSUTF8StringEncoding)!
Input.swift:102
        inputHandle.readabilityHandler = {(inputHandle) in = NSFileHandle.fileHandleWithStandardInput()
0014        
0015        public private(set) static var pipedData
Input.swift:27
        if pipedData != nil {
Input.swift:103
            pipedData = String(data: inputHandle.availableData, encoding: NSUTF8StringEncoding): String? = nil
0016        
0017        static let PipeUserInputOverlapError
Input.swift:28
            throw PipeUserInputOverlapError = CLIError.Error("Data should not be both piped and input")
0018        
0019        //  MARK: - Public
0020        
0021        /**
0022            Awaits a string of input
0023            - Parameter message: message to be printed before accepting input (e.g. "Name: ")
0024            - Throws: Input.PipeUserInputOverlapError if the user piped data and this method was called
0025        */
0026        public class func awaitInput
Input.swift:49
            let str = try awaitInput(message: message)(message message: String?) throws -> String {
0027            if pipedData != nil {
0028                throw PipeUserInputOverlapError
0029            }
0030            
0031            if let message = message {
0032                print(message)
0033            }
0034            
0035            var input = String(data: inputHandle.availableData, encoding: NSUTF8StringEncoding)!
0036            input = input.substringToIndex(input.endIndex.advancedBy(-))
0037            
0038            return input
0039        }
0040        
0041        /**
0042            Awaits a string of valid input; continues accepting input until the given input is determined to be valid
0043            - Parameter message: message to be printed before accepting input (e.g. "Name: ")
0044            - Parameter validation: closure evaluating whether the given input was valid
0045            - Throws: Input.PipeUserInputOverlapError if the user piped data and this method was called
0046        */
0047        public class func awaitInputWithValidation
Input.swift:66
        let input = try awaitInputWithValidation(message: message) {(input) in(message message: String?, validation: (input: String) -> Bool) throws -> String {
0048            while (true) {
0049                let str = try awaitInput(message: message)
0050                
0051                if validation(input: str) {
0052                    return str
0053                } else {
0054                    print("Invalid input")
0055                }
0056            }
0057        }
0058        
0059        /**
0060            Awaits a string of convertible input; continues accepting input until the given input is successfully converted
0061            - Parameter message: message to be printed before accepting input (e.g. "Name: ")
0062            - Parameter conversion: closure attempting to convert the input to the desired output
0063            - Throws: Input.PipeUserInputOverlapError if the user piped data and this method was called
0064        */
0065        public class func awaitInputWithConversion
Input.swift:79
        return try awaitInputWithConversion(message: message) { Int($0) }
Input.swift:88
        return try awaitInputWithConversion(message: "\(message) [y/N]: ") {(input) in<T>(message message: String?, conversion: (input: String) -> T?) throws -> T {
0066            let input = try awaitInputWithValidation(message: message) {(input) in
0067                return conversion(input: input) != nil
0068            }
0069            
0070            return conversion(input: input)!
0071        }
0072        
0073        /**
0074            Awaits the input of an Int
0075            - Parameter message: message to be printed before accepting input (e.g. "Name: ")
0076            - Throws: Input.PipeUserInputOverlapError if the user piped data and this method was called
0077        */
0078        public class func awaitInt(message message: String?) throws -> Int {
0079            return try awaitInputWithConversion(message: message) { Int($0) }
0080        }
0081        
0082        /**
0083            Awaits yes/no input; "y" and "yes" are accepted as yes and "n" and "no" are accepted as no (case insensitive)
0084            - Parameter message: message to be printed before accepting input (e.g. "Name: ")
0085            - Throws: Input.PipeUserInputOverlapError if the user piped data and this method was called
0086        */
0087        public class func awaitYesNoInput(message message: String = "Confirm?") throws -> Bool {
0088            return try awaitInputWithConversion(message: "\(message) [y/N]: ") {(input) in
0089                if input.lowercaseString == "y" || input.lowercaseString == "yes" {
0090                    return true
0091                } else if input.lowercaseString == "n" || input.lowercaseString == "no" {
0092                    return false
0093                }
0094                
0095                return nil
0096            }
0097        }
0098        
0099        // MARK: - Internal
0100        
0101        class func checkForPipedData
CLI.swift:45
        Input.checkForPipedData()() {
0102            inputHandle.readabilityHandler = {(inputHandle) in
0103                pipedData = String(data: inputHandle.availableData, encoding: NSUTF8StringEncoding)
0104                inputHandle.readabilityHandler = nil
0105            }
0106            NSProcessInfo.processInfo().arguments // For whatever reason, this triggers readabilityHandler for the pipe data
0107        }
0108        
0109    }