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113 lines
3.5 KiB
113 lines
3.5 KiB
// Copyright (c) 2016-present, Facebook, Inc. All rights reserved.
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//
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// You are hereby granted a non-exclusive, worldwide, royalty-free license to use,
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// copy, modify, and distribute this software in source code or binary form for use
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// in connection with the web services and APIs provided by Facebook.
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//
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// As with any software that integrates with the Facebook platform, your use of
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// this software is subject to the Facebook Developer Principles and Policies
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// [http://developers.facebook.com/policy/]. This copyright notice shall be
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// included in all copies or substantial portions of the software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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import Foundation
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extension AppInvite {
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/**
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A promo code for an App Invite promotion. This can be between 0 and 10 characters long, and can contain alphanumeric
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and spaces only.
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If you attempt to create a Promo Code with an invalid string literal, you will receive a runtime warning, and your
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code will be truncated.
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*/
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public struct PromoCode {
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internal let rawValue: String
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/**
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Attempt to create a promo code from a string.
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- parameter string: The string to initialize from.
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*/
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public init?(string: String) {
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let truncated = PromoCode.truncate(string: string)
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if string != truncated {
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return nil
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}
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rawValue = string
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}
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}
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}
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extension AppInvite.PromoCode: Hashable {
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/// The hash of this promo code.
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public var hashValue: Int {
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return rawValue.hashValue
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}
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/**
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Compare two `PromoCode`s for equality.
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- parameter lhs: The first promo code to compare.
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- parameter rhs: The second promo code to compare.
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- returns: Whether or not the promo codes are equal.
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*/
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public static func == (lhs: AppInvite.PromoCode, rhs: AppInvite.PromoCode) -> Bool {
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return lhs.rawValue == rhs.rawValue
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}
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}
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extension AppInvite.PromoCode: ExpressibleByStringLiteral {
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/**
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Create a PromoCode from a string literal.
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- parameter value: The string literal to intiialize from.
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*/
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public init(stringLiteral value: String) {
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let truncated = AppInvite.PromoCode.truncate(string: value)
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if truncated != value {
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print("Warning: Attempted to create a PromoCode from \"\(value)\" which contained invalid characters, or was too long.")
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}
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rawValue = truncated
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}
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/**
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Create a PromoCode from a unicode scalar literal.
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- parameter value: The string literal to intiialize from.
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*/
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public init(unicodeScalarLiteral value: String) {
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self.init(stringLiteral: value)
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}
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/**
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Create a PromoCode from an extended grapheme cluster literal.
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- parameter value: The string literal to initialize from.
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*/
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public init(extendedGraphemeClusterLiteral value: String) {
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self.init(stringLiteral: value)
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}
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}
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extension AppInvite.PromoCode {
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fileprivate static func truncate(string: String) -> String {
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let validCharacters = CharacterSet.alphanumerics
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let cleaned = string
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.unicodeScalars
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.filter({
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validCharacters.contains(UnicodeScalar(UInt16($0.value))!)
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})
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.map(Character.init)
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return String(cleaned)
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}
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}
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