optonaut · pisces · Mar 30, 2022 · Apr 1, 2022
diff --git a/ActiveLabel.xcodeproj/project.pbxproj b/ActiveLabel.xcodeproj/project.pbxproj
@@ -20,6 +20,8 @@
 		C1D15C791D7C9B610041D119 /* StringTrimExtension.swift in Sources */ = {isa = PBXBuildFile; fileRef = C1D15C781D7C9B610041D119 /* StringTrimExtension.swift */; };
 		C1D15C7B1D7C9B7E0041D119 /* ActiveBuilder.swift in Sources */ = {isa = PBXBuildFile; fileRef = C1D15C7A1D7C9B7E0041D119 /* ActiveBuilder.swift */; };
 		C1E867D61C3D7AEA00FD687A /* RegexParser.swift in Sources */ = {isa = PBXBuildFile; fileRef = C1E867D51C3D7AEA00FD687A /* RegexParser.swift */; };
+		CE3BE94027F4F509006A3145 /* StringSubscriptExtension.swift in Sources */ = {isa = PBXBuildFile; fileRef = CE3BE93E27F4F509006A3145 /* StringSubscriptExtension.swift */; };
+		CE3BE94127F4F509006A3145 /* Timestamp.swift in Sources */ = {isa = PBXBuildFile; fileRef = CE3BE93F27F4F509006A3145 /* Timestamp.swift */; };
 		E267FA251DB3A34900EEAC4C /* ActiveLabel.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 8F0249A21B9989B1005D8035 /* ActiveLabel.framework */; };
 		E267FA261DB3A34900EEAC4C /* ActiveLabel.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 8F0249A21B9989B1005D8035 /* ActiveLabel.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 /* End PBXBuildFile section */
@@ -74,6 +76,8 @@
 		C1D15C781D7C9B610041D119 /* StringTrimExtension.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = StringTrimExtension.swift; sourceTree = "<group>"; };
 		C1D15C7A1D7C9B7E0041D119 /* ActiveBuilder.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ActiveBuilder.swift; sourceTree = "<group>"; };
 		C1E867D51C3D7AEA00FD687A /* RegexParser.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = RegexParser.swift; sourceTree = "<group>"; };
+		CE3BE93E27F4F509006A3145 /* StringSubscriptExtension.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = StringSubscriptExtension.swift; sourceTree = "<group>"; };
+		CE3BE93F27F4F509006A3145 /* Timestamp.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Timestamp.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -131,7 +135,9 @@
 				8F0249D21B998C00005D8035 /* ActiveLabel.swift */,
 				C1D15C7A1D7C9B7E0041D119 /* ActiveBuilder.swift */,
 				C1E867D51C3D7AEA00FD687A /* RegexParser.swift */,
+				CE3BE93E27F4F509006A3145 /* StringSubscriptExtension.swift */,
 				C1D15C781D7C9B610041D119 /* StringTrimExtension.swift */,
+				CE3BE93F27F4F509006A3145 /* Timestamp.swift */,
 				8F0249A71B9989B1005D8035 /* Info.plist */,
 			);
 			path = ActiveLabel;
@@ -305,6 +311,8 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				CE3BE94127F4F509006A3145 /* Timestamp.swift in Sources */,
+				CE3BE94027F4F509006A3145 /* StringSubscriptExtension.swift in Sources */,
 				C1D15C791D7C9B610041D119 /* StringTrimExtension.swift in Sources */,
 				8F0249D31B998C00005D8035 /* ActiveLabel.swift in Sources */,
 				8F0249D51B998D21005D8035 /* ActiveType.swift in Sources */,

diff --git a/ActiveLabel/ActiveBuilder.swift b/ActiveLabel/ActiveBuilder.swift
@@ -22,6 +22,8 @@ struct ActiveBuilder {
             return createElements(from: text, for: type, range: range, minLength: 1, filterPredicate: filterPredicate)
         case .email:
             return createElements(from: text, for: type, range: range, filterPredicate: filterPredicate)
+        case .timestamp:
+            return createElements(from: text, for: type, range: range, filterPredicate: filterPredicate)
         }
     }
 
@@ -38,7 +40,7 @@ struct ActiveBuilder {
 
             guard let maxLength = maximumLength, word.count > maxLength else {
                 let range = maximumLength == nil ? match.range : (text as NSString).range(of: word)
-                let element = ActiveElement.create(with: type, text: word)
+                let element = ActiveElement.create(with: type, range: range, text: word, fullText: text)
                 elements.append((range, element, type))
                 continue
             }
@@ -67,7 +69,7 @@ struct ActiveBuilder {
             let word = nsstring.substring(with: match.range)
                 .trimmingCharacters(in: CharacterSet.whitespacesAndNewlines)
             if filterPredicate?(word) ?? true {
-                let element = ActiveElement.create(with: type, text: word)
+                let element = ActiveElement.create(with: type, range: match.range, text: word, fullText: text)
                 elements.append((match.range, element, type))
             }
         }
@@ -93,7 +95,7 @@ struct ActiveBuilder {
             }
 
             if filterPredicate?(word) ?? true {
-                let element = ActiveElement.create(with: type, text: word)
+                let element = ActiveElement.create(with: type, range: match.range, text: word, fullText: text)
                 elements.append((match.range, element, type))
             }
         }

diff --git a/ActiveLabel/ActiveLabel.swift b/ActiveLabel/ActiveLabel.swift
@@ -39,6 +39,12 @@ typealias ElementTuple = (range: NSRange, element: ActiveElement, type: ActiveTy
     @IBInspectable open var hashtagSelectedColor: UIColor? {
         didSet { updateTextStorage(parseText: false) }
     }
+    @IBInspectable open var timestampColor: UIColor = .blue {
+        didSet { updateTextStorage(parseText: false) }
+    }
+    @IBInspectable open var timestampSelectedColor: UIColor? {
+        didSet { updateTextStorage(parseText: false) }
+    }
     @IBInspectable open var URLColor: UIColor = .blue {
         didSet { updateTextStorage(parseText: false) }
     }
@@ -90,6 +96,10 @@ typealias ElementTuple = (range: NSRange, element: ActiveElement, type: ActiveTy
     open func handleEmailTap(_ handler: @escaping (String) -> ()) {
         emailTapHandler = handler
     }
+
+    open func handleTimestampTap(_ handler: @escaping (Timestamp) -> ()) {
+        timestampTapHandler = handler
+    }
 
     open func removeHandle(for type: ActiveType) {
         switch type {
@@ -103,6 +113,8 @@ typealias ElementTuple = (range: NSRange, element: ActiveElement, type: ActiveTy
             customTapHandlers[type] = nil
         case .email:
             emailTapHandler = nil
+        case .timestamp:
+            timestampTapHandler = nil
         }
     }
 
@@ -115,6 +127,11 @@ typealias ElementTuple = (range: NSRange, element: ActiveElement, type: ActiveTy
         hashtagFilterPredicate = predicate
         updateTextStorage()
     }
+
+    open func filterTimestamp(_ predicate: @escaping (String) -> Bool) {
+        timestampFilterPredicate = predicate
+        updateTextStorage()
+    }
 
     // MARK: - override UILabel properties
     override open var text: String? {
@@ -223,6 +240,7 @@ typealias ElementTuple = (range: NSRange, element: ActiveElement, type: ActiveTy
             case .url(let originalURL, _): didTapStringURL(originalURL)
             case .custom(let element): didTap(element, for: selectedElement.type)
             case .email(let element): didTapStringEmail(element)
+            case .timestamp(let element): didTapTimestamp(element)
             }
 
             let when = DispatchTime.now() + Double(Int64(0.25 * Double(NSEC_PER_SEC))) / Double(NSEC_PER_SEC)
@@ -251,10 +269,12 @@ typealias ElementTuple = (range: NSRange, element: ActiveElement, type: ActiveTy
     internal var hashtagTapHandler: ((String) -> ())?
     internal var urlTapHandler: ((URL) -> ())?
     internal var emailTapHandler: ((String) -> ())?
+    internal var timestampTapHandler: ((Timestamp) -> ())?
     internal var customTapHandlers: [ActiveType : ((String) -> ())] = [:]
 
     fileprivate var mentionFilterPredicate: ((String) -> Bool)?
     fileprivate var hashtagFilterPredicate: ((String) -> Bool)?
+    fileprivate var timestampFilterPredicate: ((String) -> Bool)?
 
     fileprivate var selectedElement: ElementTuple?
     fileprivate var heightCorrection: CGFloat = 0
@@ -333,6 +353,7 @@ typealias ElementTuple = (range: NSRange, element: ActiveElement, type: ActiveTy
             case .url: attributes[NSAttributedString.Key.foregroundColor] = URLColor
             case .custom: attributes[NSAttributedString.Key.foregroundColor] = customColor[type] ?? defaultCustomColor
             case .email: attributes[NSAttributedString.Key.foregroundColor] = URLColor
+            case .timestamp: attributes[NSAttributedString.Key.foregroundColor] = timestampColor
             }
 
             if let highlightFont = hightlightFont {
@@ -371,8 +392,13 @@ typealias ElementTuple = (range: NSRange, element: ActiveElement, type: ActiveTy
                 filter = mentionFilterPredicate
             } else if type == .hashtag {
                 filter = hashtagFilterPredicate
+            } else if type == .timestamp {
+                filter = timestampFilterPredicate
             }
-            let hashtagElements = ActiveBuilder.createElements(type: type, from: textString, range: textRange, filterPredicate: filter)
+            let hashtagElements = ActiveBuilder
+                .createElements(type: type, from: textString, range: textRange, filterPredicate: filter)
+                .filter { $0.type != .timestamp || Timestamp.filter(at: $0.range, with: textString) }
+
             activeElements[type] = hashtagElements
         }
 
@@ -416,6 +442,7 @@ typealias ElementTuple = (range: NSRange, element: ActiveElement, type: ActiveTy
                 let possibleSelectedColor = customSelectedColor[selectedElement.type] ?? customColor[selectedElement.type]
                 selectedColor = possibleSelectedColor ?? defaultCustomColor
             case .email: selectedColor = URLSelectedColor ?? URLColor
+            case .timestamp: selectedColor = timestampSelectedColor ?? timestampColor
             }
             attributes[NSAttributedString.Key.foregroundColor] = selectedColor
         } else {
@@ -426,6 +453,7 @@ typealias ElementTuple = (range: NSRange, element: ActiveElement, type: ActiveTy
             case .url: unselectedColor = URLColor
             case .custom: unselectedColor = customColor[selectedElement.type] ?? defaultCustomColor
             case .email: unselectedColor = URLColor
+            case .timestamp: unselectedColor = timestampColor
             }
             attributes[NSAttributedString.Key.foregroundColor] = unselectedColor
         }
@@ -524,6 +552,14 @@ typealias ElementTuple = (range: NSRange, element: ActiveElement, type: ActiveTy
         }
         emailHandler(stringEmail)
     }
+
+    fileprivate func didTapTimestamp(_ timestamp: Timestamp) {
+        guard let timestampTapHandler = timestampTapHandler else {
+            delegate?.didSelect(timestamp.timeString, type: .timestamp)
+            return
+        }
+        timestampTapHandler(timestamp)
+    }
 
     fileprivate func didTap(_ element: String, for type: ActiveType) {
         guard let elementHandler = customTapHandlers[type] else {

diff --git a/ActiveLabel/ActiveType.swift b/ActiveLabel/ActiveType.swift
@@ -13,14 +13,16 @@ enum ActiveElement {
     case hashtag(String)
     case email(String)
     case url(original: String, trimmed: String)
+    case timestamp(Timestamp)
     case custom(String)
 
-    static func create(with activeType: ActiveType, text: String) -> ActiveElement {
+    static func create(with activeType: ActiveType, range: NSRange, text: String, fullText: String) -> ActiveElement {
         switch activeType {
         case .mention: return mention(text)
         case .hashtag: return hashtag(text)
         case .email: return email(text)
         case .url: return url(original: text, trimmed: text)
+        case .timestamp: return timestamp(.create(text, range: range, in: fullText))
         case .custom: return custom(text)
         }
     }
@@ -31,6 +33,7 @@ public enum ActiveType {
     case hashtag
     case url
     case email
+    case timestamp
     case custom(pattern: String)
 
     var pattern: String {
@@ -39,6 +42,7 @@ public enum ActiveType {
         case .hashtag: return RegexParser.hashtagPattern
         case .url: return RegexParser.urlPattern
         case .email: return RegexParser.emailPattern
+        case .timestamp: return RegexParser.timestampPattern
         case .custom(let regex): return regex
         }
     }
@@ -51,6 +55,7 @@ extension ActiveType: Hashable, Equatable {
         case .hashtag: hasher.combine(-2)
         case .url: hasher.combine(-3)
         case .email: hasher.combine(-4)
+        case .timestamp: hasher.combine(-5)
         case .custom(let regex): hasher.combine(regex)
         }
     }
@@ -62,6 +67,7 @@ public func ==(lhs: ActiveType, rhs: ActiveType) -> Bool {
     case (.hashtag, .hashtag): return true
     case (.url, .url): return true
     case (.email, .email): return true
+    case (.timestamp, .timestamp): return true
     case (.custom(let pattern1), .custom(let pattern2)): return pattern1 == pattern2
     default: return false
     }

diff --git a/ActiveLabel/RegexParser.swift b/ActiveLabel/RegexParser.swift
@@ -13,6 +13,8 @@ struct RegexParser {
     static let hashtagPattern = "(?:^|\\s|$)#[\\p{L}0-9_]*"
     static let mentionPattern = "(?:^|\\s|$|[.])@[\\p{L}0-9_]*"
     static let emailPattern = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
+    static let timestampPattern = "([0-9][0-9]{0,1}:)?[0-5]{0,1}[0-9]{1}:[0-5]{1}[0-9]{1}"
+    static let timestampChapterTitlePattern = "[^\\s](.*[^\\s])(\n|$)"
     static let urlPattern = "(^|[\\s.:;?\\-\\]<\\(])" +
         "((https?://|www\\.|pic\\.)[-\\w;/?:@&=+$\\|\\_.!~*\\|'()\\[\\]%#,☺]+[\\w/#](\\(\\))?)" +
     "(?=$|[\\s',\\|\\(\\).:;?\\-\\[\\]>\\)])"
@@ -24,6 +26,12 @@ struct RegexParser {
         return elementRegex.matches(in: text, options: [], range: range)
     }
 
+    static func isMatchToAnyPatterns(from text: String, range: NSRange) -> Bool {
+        [hashtagPattern, mentionPattern, emailPattern, timestampPattern, urlPattern]
+            .compactMap { getElements(from: text, with: $0, range: range).first }
+            .count > 0
+    }
+
     private static func regularExpression(for pattern: String) -> NSRegularExpression? {
         if let regex = cachedRegularExpressions[pattern] {
             return regex

diff --git a/ActiveLabel/StringSubscriptExtension.swift b/ActiveLabel/StringSubscriptExtension.swift
@@ -0,0 +1,23 @@
+//
+//  StringSubscriptExtension.swift
+//  ActiveLabel
+//
+//  Created by Steve Kim on 2022/03/31.
+//  Copyright © 2022 Optonaut. All rights reserved.
+//
+
+import Foundation
+
+extension String {
+    subscript(at range: NSRange?) -> Self? {
+        guard let range = range else { return nil }
+        let endIndexOf = range.location + range.length - 1
+        let isSafeRange = range.location >= 0 && endIndexOf < count
+
+        guard isSafeRange else { return nil }
+
+        let startIndex = index(self.startIndex, offsetBy: range.location)
+        let endIndex = index(self.startIndex, offsetBy: range.location + range.length)
+        return Self(self[startIndex..<endIndex])
+    }
+}