ably-cocoa/Spec/Helpers.swift

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import Foundation
import Runes
// MARK: - Monads
let arrayToJSONData: NSArray -> NSData? = {
try? NSJSONSerialization.dataWithJSONObject($0, options: NSJSONWritingOptions.allZeros)
}
let dictionaryToJSONData: NSDictionary -> NSData? = {
try? NSJSONSerialization.dataWithJSONObject($0, options: NSJSONWritingOptions.allZeros)
}
let arrayToPrettyJSONData: NSArray -> NSData? = {
try? NSJSONSerialization.dataWithJSONObject($0, options: NSJSONWritingOptions.PrettyPrinted)
}
let dictionaryToPrettyJSONData: NSDictionary -> NSData? = {
try? NSJSONSerialization.dataWithJSONObject($0, options: NSJSONWritingOptions.PrettyPrinted)
}
let dataToJSONString: NSData -> NSString? = {
NSString(data: $0, encoding: NSUTF8StringEncoding)
}
let JSONStringToData: String -> NSData? = {
NSString(string: $0).dataUsingEncoding(NSUTF8StringEncoding)
}
let JSONDataToAny: NSData -> AnyObject? = {
try? NSJSONSerialization.JSONObjectWithData($0, options: .mutableLeaves)
}
/**
**Monad** Convert array to JSON
*/
let arrayToJSONString: NSArray -> String? = {
$0 >>- arrayToJSONData >>- dataToJSONString >>- { $0 as String }
}
/**
**Monad** Convert JSON to dictionary
*/
let JSONToDictionary: NSData -> NSDictionary? = {
$0 >>- JSONDataToAny >>- { $0 as? NSDictionary ?? nil }
}
/**
**Monad** Convert JSON to array
*/
let JSONToArray: NSData -> NSArray? = {
$0 >>- JSONDataToAny >>- { $0 as? NSArray ?? nil }
}