Middleware example
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class CheckNilMiddleware: Middleware { | |
override func check(value: MiddlewareItem) -> MiddlewareItem { | |
switch value { | |
case .value(let str): | |
if str == nil { | |
return .error("Значение равно nil") | |
} | |
default: break | |
} | |
return checkNext(value: value) | |
} | |
} | |
class CheckCountMiddleware: Middleware { | |
private let length: Int | |
init(length: Int) { | |
self.length = length | |
} | |
override func check(value: MiddlewareItem) -> MiddlewareItem { | |
switch value { | |
case .value(let str): | |
if str?.count != length { | |
return .error("Длинна должна быть \(length)") | |
} | |
default: break | |
} | |
return checkNext(value: value) | |
} | |
} | |
class PhoneFormatterMiddleware: Middleware { | |
private let format: String // "+X (XXX) XXX XX-XX" | |
init(format: String) { | |
self.format = format | |
} | |
override func check(value: MiddlewareItem) -> MiddlewareItem { | |
switch value { | |
case .value(let str): | |
if let s = str { | |
let cleanPhoneNumber = s.components(separatedBy: CharacterSet.decimalDigits.inverted).joined() | |
let mask = format | |
var result = "" | |
var index = cleanPhoneNumber.startIndex | |
for ch in mask { | |
if index == cleanPhoneNumber.endIndex { | |
break | |
} | |
if ch == "X" { | |
result.append(cleanPhoneNumber[index]) | |
index = cleanPhoneNumber.index(after: index) | |
} else { | |
result.append(ch) | |
} | |
} | |
return .value(result) | |
} | |
default: break | |
} | |
return checkNext(value: value) | |
} | |
} |
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