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135 lines
4.1 KiB
135 lines
4.1 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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/**
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Represents a type-safe OpenGraph property name.
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*/
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public struct OpenGraphPropertyName {
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/// The namespace of this open graph property
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public var namespace: String
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/// The name of this open graph property
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public var name: String
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/**
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Attempt to parse an `OpenGraphPropertyName` from a raw OpenGraph formatted property name.
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- parameter string: The string to create from.
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*/
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public init?(_ string: String) {
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let components = string.characters.split(separator: ":")
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guard components.count >= 2 else {
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return nil
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}
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self.namespace = String(components[0])
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let subcharacters = components[1 ... components.count]
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self.name = subcharacters.reduce("", { $0 + ":" + String($1) })
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}
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/**
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Create an `OpenGraphPropertyName` with a specific namespace and name.
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- parameter namespace: The namespace to use.
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- parameter name: The name to use.
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*/
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public init(namespace: String, name: String) {
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self.namespace = namespace
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self.name = name
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}
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}
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extension OpenGraphPropertyName: RawRepresentable {
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public typealias RawValue = String
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/// The raw OpenGraph formatted property name.
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public var rawValue: String {
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return namespace.isEmpty
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? name
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: namespace + ":" + name
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}
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/**
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Attempt to parse an `OpenGraphPropertyName` from a raw OpenGraph formatted proeprty name.
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- parameter rawValue: The string to create from.
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*/
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public init(rawValue: String) {
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self.init(stringLiteral: rawValue)
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}
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}
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extension OpenGraphPropertyName: ExpressibleByStringLiteral {
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/**
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Create an `OpenGraphPropertyName` from a string literal.
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- parameter value: The string literal to create from.
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*/
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public init(stringLiteral value: String) {
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guard let propertyName = OpenGraphPropertyName(value) else {
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print("Warning: Attempting to create OpenGraphPropertyName for string \"\(value)\", which has no namespace!")
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self.namespace = ""
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self.name = value
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return
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}
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self.namespace = propertyName.namespace
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self.name = propertyName.name
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}
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/**
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Create an `OpenGraphPropertyName` from a unicode scalar literal.
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- parameter value: The scalar literal to create from.
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*/
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public init(unicodeScalarLiteral value: UnicodeScalarType) {
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self.init(stringLiteral: value)
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}
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/**
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Create an `OpenGraphPropertyName` from an grapheme cluster literal.
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- parameter value: The grapheme cluster to create from.
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*/
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public init(extendedGraphemeClusterLiteral value: ExtendedGraphemeClusterType) {
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self.init(stringLiteral: value)
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}
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}
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extension OpenGraphPropertyName: Hashable {
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/// Calculates the hash value of this `OpenGraphPropertyName`.
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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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Compares two `OpenGraphPropertyName`s for equality.
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- parameter lhs: The first property name to compare.
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- parameter rhs: The second property name to compare.
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- returns: Whether or not these names are equal.
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*/
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public static func == (lhs: OpenGraphPropertyName, rhs: OpenGraphPropertyName) -> Bool {
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return lhs.rawValue == rhs.rawValue
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}
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}
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