Add convenience method that returns BloggingPromptsAttribution

Author: dvdchr

WordPress/Classes/Models/BloggingPrompt+CoreDataClass.swift

@@ -17,6 +17,10 @@ public class BloggingPrompt: NSManagedObject {
         self.displayAvatarURLs = []
     }
 
+    var promptAttribution: BloggingPromptsAttribution? {
+        BloggingPromptsAttribution(rawValue: attribution.lowercased())
+    }
+
     /// Convenience method to map properties from `RemoteBloggingPrompt`.
     ///
     /// - Parameters:

WordPress/Classes/ViewRelated/Blog/Blog Dashboard/Cards/Prompts/DashboardPromptsCardCell.swift

@@ -352,8 +352,7 @@ private extension DashboardPromptsCardCell {
         promptLabel.text = forExampleDisplay ? Strings.examplePrompt : prompt?.text.stringByDecodingXMLCharacters().trim()
         containerStackView.addArrangedSubview(promptTitleView)
 
-        if let promptAttribution = prompt?.attribution.lowercased(),
-           let attribution = BloggingPromptsAttribution(rawValue: promptAttribution) {
+        if let attribution = prompt?.promptAttribution {
             attributionIcon.image = attribution.iconImage
             attributionSourceLabel.attributedText = attribution.attributedText
             containerStackView.addArrangedSubview(attributionStackView)