Stub out support for Twitter entities

Frameworks/Account/FeedProvider/Twitter/TwitterEntities.swift

@@ -8,6 +8,28 @@
 
 import Foundation
 
+protocol TwitterEntity {
+	var indices: [Int]? { get }
+	func renderAsHTML() -> String
+}
+
+extension TwitterEntity {
+	var startIndex: Int? {
+		if indices?.count ?? 0 > 0 {
+			return indices?[0]
+		}
+		return nil
+	}
+	
+	var endIndex: Int? {
+		if indices?.count ?? 0 > 1 {
+			return indices?[1]
+		}
+		return nil
+	}
+	
+}
+
 struct TwitterEntities: Codable {
 	
 	let hashtags: [TwitterHashtag]?
@@ -22,4 +44,21 @@ struct TwitterEntities: Codable {
 		case symbols = "symbols"
 	}
 	
+	func combineAndSort() -> [TwitterEntity] {
+		var entities = [TwitterEntity]()
+		if let hashtags = hashtags {
+			entities.append(contentsOf: hashtags)
+		}
+		if let urls = urls {
+			entities.append(contentsOf: urls)
+		}
+		if let userMentions = userMentions {
+			entities.append(contentsOf: userMentions)
+		}
+		if let symbols = symbols {
+			entities.append(contentsOf: symbols)
+		}
+		return entities
+	}
+	
 }

Frameworks/Account/FeedProvider/Twitter/TwitterHashtag.swift

@@ -8,7 +8,7 @@
 
 import Foundation
 
-struct TwitterHashtag: Codable {
+struct TwitterHashtag: Codable, TwitterEntity {
 	
 	let text: String?
 	let indices: [Int]?
@@ -18,4 +18,7 @@ struct TwitterHashtag: Codable {
 		case indices = "indices"
 	}
 	
+	func renderAsHTML() -> String {
+		return ""
+	}
 }

Frameworks/Account/FeedProvider/Twitter/TwitterMention.swift

@@ -8,7 +8,7 @@
 
 import Foundation
 
-struct TwitterMention: Codable {
+struct TwitterMention: Codable, TwitterEntity {
 	
 	let name: String?
 	let indices: [Int]?
@@ -24,4 +24,8 @@ struct TwitterMention: Codable {
 		case idStr = "idStr"
 	}
 	
+	func renderAsHTML() -> String {
+		return ""
+	}
+	
 }

Frameworks/Account/FeedProvider/Twitter/TwitterSymbol.swift

@@ -8,7 +8,7 @@
 
 import Foundation
 
-struct TwitterSymbol: Codable {
+struct TwitterSymbol: Codable, TwitterEntity {
 	
 	let name: String?
 	let indices: [Int]?
@@ -18,4 +18,8 @@ struct TwitterSymbol: Codable {
 		case indices = "indices"
 	}
 	
+	func renderAsHTML() -> String {
+		return ""
+	}
+	
 }

Frameworks/Account/FeedProvider/Twitter/TwitterURL.swift

@@ -8,7 +8,7 @@
 
 import Foundation
 
-struct TwitterURL: Codable {
+struct TwitterURL: Codable, TwitterEntity {
 	
 	let url: String?
 	let indices: [Int]?
@@ -22,4 +22,8 @@ struct TwitterURL: Codable {
 		case expandedURL = "expandedURL"
 	}
 	
+	func renderAsHTML() -> String {
+		return ""
+	}
+	
 }