Add screen slider component

CHDataManagement/Generator/Blocks/ContentBlock.swift

@@ -13,6 +13,8 @@ enum ContentBlock: String, CaseIterable {
 
     case labels
 
+    case screens
+
     var processor: BlockProcessor.Type {
         switch self {
         case .audio: return AudioBlock.self
@@ -21,6 +23,7 @@ enum ContentBlock: String, CaseIterable {
         case .button: return ButtonBlock.self
         case .buttons: return ButtonsBlock.self
         case .labels: return LabelsBlock.self
+        case .screens: return PhoneScreensBlock.self
         }
     }
 }

CHDataManagement/Generator/Blocks/PhoneScreensBlock.swift

@@ -0,0 +1,104 @@
+
+struct PhoneScreensBlock: OrderedKeyBlockProcessor {
+
+    enum Key: String {
+        case id
+        case frame
+        case tall
+        case wide
+    }
+
+    static let blockId: ContentBlock = .screens
+
+    let content: Content
+
+    let results: PageGenerationResults
+
+    let language: ContentLanguage
+
+    init(content: Content, results: PageGenerationResults, language: ContentLanguage) {
+        self.content = content
+        self.results = results
+        self.language = language
+    }
+
+    func process(_ arguments: [(key: Key, value: String)], markdown: Substring) -> String {
+        print("Processing Phone Screens Block")
+        guard let frameId = arguments.first(where: {$0.key == .frame })?.value else {
+            invalid(markdown)
+            return ""
+        }
+        guard let frameFile = content.file(frameId) else {
+            results.missing(file: frameId, source: "Wallpaper Block")
+            return ""
+        }
+
+        guard let id = arguments.first(where: {$0.key == .id })?.value else {
+            invalid(markdown)
+            return ""
+        }
+
+        let remaining = arguments.filter { $0.key == .tall || $0.key == .wide }
+
+        var images = [WallpaperSlider.Image]()
+        var tall: FileResource?
+        var wide: FileResource?
+        for (key, fileId) in remaining {
+            guard let file = content.file(fileId) else {
+                print("Missing file: \(fileId)")
+                results.missing(file: fileId, source: "Wallpaper Block")
+                return ""
+            }
+            if key == .tall {
+                if tall != nil {
+                    print("Another tall image: \(file.id)")
+                    invalid(markdown)
+                    return ""
+                }
+                if let other = wide {
+                    let image = WallpaperSlider.Image(
+                        tall: file,
+                        wide: other,
+                        language: language,
+                        results: results)
+                    images.append(image)
+                    wide = nil
+                    continue
+                }
+                tall = file
+                continue
+            }
+            // key == .wide
+            if wide != nil {
+                print("Another wide image: \(file.id)")
+                invalid(markdown)
+                return ""
+            }
+            guard let other = tall else {
+                wide = file
+                continue
+            }
+            let image = WallpaperSlider.Image(
+                tall: other,
+                wide: file,
+                language: language,
+                results: results)
+            images.append(image)
+            tall = nil
+        }
+        if tall != nil || wide != nil {
+            invalid(markdown)
+            print("Wide/tall does not have the same number of items")
+            return ""
+        }
+
+        let frame = WallpaperSlider.Frame(frame: frameFile, language: language, results: results)
+        let slider = WallpaperSlider(frame: frame, images: images, id: id)
+
+        results.require(footer: slider.script)
+        results.require(headers: .swiperJs, .swiperCss)
+        results.require(header: .style(slider.style))
+
+        return slider.content
+    }
+}