add logging and model handling

MVMCoreUI/Atomic/Atoms/Views/Label/Label.swift

@@ -831,11 +831,16 @@ extension Label {
         
         guard let string = string,
               range.location > 0 && range.location < string.length
-        else { return }
+        else {
+            MVMCoreLoggingHandler.shared()?.addError(toLog: MVMCoreErrorObject(title: nil, messageToLog: "Attribute starting location \(range.lowerBound) is out of bounds for '\(string?.string ?? "")'. Attribute is discarded.", code: ErrorCode.default.rawValue, domain: ErrorDomainNative, location: "\(#file): \(#function)")!)
+            return
+        }
         
         var range = range
         if range.upperBound > string.length {
-            range = NSRange(location: range.location, length: string.length - range.location)
+            let newRange = NSRange(location: range.location, length: string.length - range.location)
+            MVMCoreLoggingHandler.shared()?.addError(toLog: MVMCoreErrorObject(title: nil, messageToLog: "Attribute ending location \(range.upperBound) is out of bounds for '\(string)'. Adjusting to \(newRange.upperBound).", code: ErrorCode.default.rawValue, domain: ErrorDomainNative, location: "\(#file): \(#function)")!)
+            range = newRange
         }
         
         string.addAttributes([NSAttributedString.Key.underlineStyle: NSUnderlineStyle.single.rawValue], range: range)

MVMCoreUI/Atomic/Atoms/Views/Label/LabelAttributeImageModel.swift

@@ -36,6 +36,14 @@ class LabelAttributeImageModel: LabelAttributeModel {
         case URL
     }
     
+    public override func validateInRange(of text: String) -> Bool {
+        guard location > 0 && location <= text.count else {
+            MVMCoreLoggingHandler.shared()?.addError(toLog: MVMCoreErrorObject(title: nil, messageToLog: "Attribute starting location \(location) is out of bounds for '\(text)'. Attribute is discarded.", code: ErrorCode.default.rawValue, domain: ErrorDomainNative, location: "\(#file): \(#function)")!)
+            return false
+        }
+        return true
+    }
+    
     //--------------------------------------------------
     // MARK: - Codec
     //--------------------------------------------------

MVMCoreUI/Atomic/Atoms/Views/Label/LabelAttributeModel.swift

@@ -44,6 +44,23 @@
         case length
     }
     
+    public func validateInRange(of text: String) -> Bool {
+        // Prevent invalid starting locations.
+        guard location > 0 && location <= text.count else {
+            MVMCoreLoggingHandler.shared()?.addError(toLog: MVMCoreErrorObject(title: nil, messageToLog: "Attribute starting location \(location) is out of bounds for '\(text)'. Attribute is discarded.", code: ErrorCode.default.rawValue, domain: ErrorDomainNative, location: "\(#file): \(#function)")!)
+            return false
+        }
+        
+        // Truncate long lengths
+        guard length + location <= text.count else {
+            MVMCoreLoggingHandler.shared()?.addError(toLog: MVMCoreErrorObject(title: nil, messageToLog: "Attribute length \(length) is out of bounds for '\(text)'. Adjusting to \(text.count - location).", code: ErrorCode.default.rawValue, domain: ErrorDomainNative, location: "\(#file): \(#function)")!)
+            length = text.count - location
+            return true
+        }
+        
+        return true
+    }
+    
     //--------------------------------------------------
     // MARK: - Codec
     //--------------------------------------------------

MVMCoreUI/Atomic/Atoms/Views/Label/LabelModel.swift

@@ -21,7 +21,17 @@
     public var fontName: String?
     public var fontSize: CGFloat?
     public var textAlignment: NSTextAlignment?
-    public var attributes: [LabelAttributeModel]?
+    private var _attributes: [LabelAttributeModel]?
+    public var attributes: [LabelAttributeModel]? {
+        get { _attributes }
+        set {
+            if let attributes = newValue {
+                _attributes = validate(attributes)
+            } else {
+                _attributes = nil
+            }
+        }
+    }
     public var html: String?
     public var hero: Int?
     public var makeWholeViewClickable: Bool?
@@ -60,6 +70,13 @@
         self.text = text
     }
     
+    //--------------------------------------------------
+    // MARK: - Validations
+    //--------------------------------------------------
+    public func validate(_ attributes: [LabelAttributeModel]) -> [LabelAttributeModel] {
+        return attributes.filter { $0.validateInRange(of: text) }
+    }
+    
     //--------------------------------------------------
     // MARK: - Codec
     //--------------------------------------------------