Refactoring

Sources/LibMakeColors/Color.swift

@@ -1,27 +0,0 @@
-struct Color: CustomStringConvertible, Equatable {
-    var description: String {
-        return a != 0xFF ? String(format: "#%02X%02X%02X%02X", r, g, b, a): String(format: "#%02X%02X%02X", r, g, b)
-    }
-
-    let r, g, b, a: UInt8
-
-    init(r: UInt8, g: UInt8, b: UInt8, a: UInt8 = 0xFF) {
-        self.r = r
-        self.g = g
-        self.b = b
-        self.a = a
-    }
-
-    init?(_ array: [UInt8]) {
-        guard array.count >= 3 else { return nil }
-        r = array[0]
-        g = array[1]
-        b = array[2]
-        a = array.count >= 4 ? array[3] : 0xFF
-    }
-}
-
-enum ColorDef {
-    case reference(String)
-    case color(Color)
-}

Sources/LibMakeColors/Extensions/FileWrapper+Extensions.swift

@@ -0,0 +1,7 @@
+import Foundation
+
+extension FileWrapper {
+    convenience init(_ string: String) {
+        self.init(regularFileWithContents: Data(string.utf8))
+    }
+}

Sources/LibMakeColors/Extensions/String+Extensions.swift

@@ -0,0 +1,40 @@
+extension StringProtocol {
+    var capitalizeFirst: String {
+        guard !isEmpty else {
+            return String(self)
+        }
+
+        return prefix(1).uppercased() + dropFirst()
+    }
+
+    var lowercasedFirst: String {
+        guard !isEmpty else {
+            return String(self)
+        }
+
+        return prefix(1).lowercased() + dropFirst()
+    }
+
+    func droppingSuffix(_ suffix: String) -> SubSequence {
+        guard hasSuffix(suffix) else {
+            return self[...]
+        }
+
+        return dropLast(suffix.count)
+    }
+
+    func insertCamelCaseSeparators(separator: String = " ") -> String {
+        replacingOccurrences(
+            of: "(?<=[a-z0-9])([A-Z])",
+            with: "\(separator)$1",
+            options: .regularExpression,
+            range: nil
+        )
+    }
+
+    func camelCasePathToSnakeCase() -> String {
+        insertCamelCaseSeparators(separator: "_")
+            .replacingOccurrences(of: "/", with: "_")
+            .lowercased()
+    }
+}

Sources/LibMakeColors/Generators/AndroidGenerator.swift

@@ -0,0 +1,44 @@
+import Foundation
+
+final class AndroidGenerator: Generator {
+    static let defaultExtension = "xml"
+
+    let context: Context
+
+    init(context: Context) {
+        self.context = context
+    }
+
+    func generate(data: [String : ColorDef]) throws -> FileWrapper {
+        var xml = """
+        <?xml version="1.0" encoding="utf-8"?>
+        <resources>
+
+        """
+
+        let prefix = context.prefix.map { $0.camelCasePathToSnakeCase() + "_" } ?? ""
+
+        for (key, color) in data.sorted() {
+            _ = try data.resolve(key)
+
+            let value: String
+            switch color {
+            case .color(let colorValue): value = colorValue.description
+            case .reference(let ref): value = "@color/\(prefix)\(ref.camelCasePathToSnakeCase())"
+            }
+
+            xml += """
+                <color name="\(prefix)\(key.camelCasePathToSnakeCase())">\(value)</color>
+
+            """
+        }
+
+        xml += """
+        </resources>
+        </xml>
+
+        """
+
+        return FileWrapper(xml)
+    }
+}

Sources/LibMakeColors/Generators/AssetCatalogGenerator.swift

@@ -0,0 +1,107 @@
+import Foundation
+
+final class AssetCatalogGenerator: Generator {
+    static let defaultExtension = "xcasset"
+    static let option = "ios"
+
+    let context: Context
+
+    init(context: Context) {
+        self.context = context
+    }
+
+    func generate(data: [String : ColorDef]) throws -> FileWrapper {
+        let root = FileWrapper(directoryWithFileWrappers: ["Contents.json" : FileWrapper(catalog)])
+        let colorRoot: FileWrapper
+
+        if let prefix = context.prefix?.insertCamelCaseSeparators() {
+            colorRoot = FileWrapper(directoryWithFileWrappers: ["Contents.json": FileWrapper(group)])
+            colorRoot.filename = prefix
+            colorRoot.preferredFilename = prefix
+            root.addFileWrapper(colorRoot)
+        } else {
+            colorRoot = root
+        }
+
+        for key in data.keys {
+            var path = key.insertCamelCaseSeparators().split(separator: "/").map(\.capitalizeFirst)
+            let colorSet = path.removeLast()
+
+            var current = colorRoot
+            for pathSegment in path {
+                if let next = current.fileWrappers?[pathSegment] {
+                    current = next
+                } else {
+                    let next = FileWrapper(directoryWithFileWrappers: ["Contents.json": FileWrapper(group)])
+                    next.filename = pathSegment
+                    next.preferredFilename = pathSegment
+                    _ = current.addFileWrapper(next)
+                    current = next
+                }
+            }
+
+            let colorWrapper = try data.resolve(key).fileWrapper()
+            colorWrapper.filename = "\(colorSet).colorset"
+            colorWrapper.preferredFilename = "\(colorSet).colorset"
+
+            current.addFileWrapper(colorWrapper)
+        }
+
+        return root
+    }
+}
+
+private extension Color {
+    func json() -> String {
+        return """
+        {
+        "colors" : [
+            {
+            "color" : {
+                "color-space" : "srgb",
+                "components" : {
+                "alpha" : "\(Float(a) / 256)",
+                "blue" : "0x\(String(b, radix: 16))",
+                "green" : "0x\(String(g, radix: 16))",
+                "red" : "0x\(String(r, radix: 16))"
+                }
+            },
+            "idiom" : "universal"
+            }
+        ],
+        "info" : {
+            "author" : "xcode",
+            "version" : 1
+        }
+        }
+        """
+    }
+
+    func fileWrapper() -> FileWrapper {
+        FileWrapper(directoryWithFileWrappers: [
+            "Contents.json": FileWrapper(json())
+        ])
+    }
+}
+
+
+private let group = """
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  },
+  "properties" : {
+    "provides-namespace" : true
+  }
+}
+"""
+
+private let catalog = """
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
+"""

Sources/LibMakeColors/Generators/Generator.swift

@@ -0,0 +1,20 @@
+import Foundation
+
+protocol Generator: class {
+    static var defaultExtension: String { get }
+    static var option: String { get }
+
+    init(context: Context)
+
+    func generate(data: [String: ColorDef]) throws -> FileWrapper
+}
+
+protocol Context: class {
+    var prefix: String? { get }
+}
+
+extension Generator {
+    static var option: String {
+        String(String(describing: self).droppingSuffix("Generator"))
+    }
+}

Sources/LibMakeColors/Generators/HTMLGenerator.swift

@@ -0,0 +1,74 @@
+import Foundation
+
+final class HTMLGenerator: Generator {
+    static let defaultExtension = "html"
+    let context: Context
+
+    init(context: Context) {
+        self.context = context
+    }
+
+    func generate(data: [String : ColorDef]) throws -> FileWrapper {
+        var html = """
+        <html>
+        <head>
+            <style type="text/css">
+                .checkered {
+                    padding: 5px;
+                    margin: 5px;
+
+                    background-image:
+                        linear-gradient(45deg, #000 25%, transparent 25%),
+                        linear-gradient(45deg, transparent 75%, #000 75%),
+                        linear-gradient(45deg, transparent 75%, #000 75%),
+                        linear-gradient(45deg, #000 25%, transparent 25%);
+
+                    background-size:30px 30px;
+
+                    background-position:0 0, 0 0, -15px -15px, 15px 15px;
+                }
+            </style>
+        <body>
+        <table>
+            <thead>
+            <tr>
+                <th>&nbsp;</th>
+                <th>Name</th>
+                <th>Value</th>
+            </tr>
+            </thead>
+            <tbody>
+
+        """
+
+        for (key, color) in data.sorted() {
+            let actualColor = try data.resolve(key)
+            let value: String
+
+            switch color {
+            case let .reference(name): value = """
+                <a href="#cref/\(name)">\(name.insertCamelCaseSeparators())</a><br>\(actualColor)
+                """
+            case .color: value = actualColor.description
+            }
+
+            html += """
+                <tr>
+                    <td class="checkered" id="cref/\(key)"><span style="background:\(actualColor); width:50px; height:50px;display:inline-block;">&nbsp;&nbsp;</span></td>
+                    <td>\(key.insertCamelCaseSeparators())</td>
+                    <td>\(value)</td>
+                </tr>
+
+            """
+        }
+
+        html += """
+        </table>
+        </body>
+        </html>
+
+        """
+
+        return FileWrapper(html)
+    }
+}

Sources/LibMakeColors/MakeColors.swift

@@ -1,10 +1,22 @@
 import ArgumentParser
 import Foundation
 
-enum Formatter: String, EnumerableFlag {
-    case ios
-    case android
-    case html
+private struct GeneratorOption: EnumerableFlag, CustomStringConvertible {
+    let type: Generator.Type
+
+    var description: String {
+        type.option
+    }
+
+    static let allCases: [GeneratorOption] = [
+        .init(type: AssetCatalogGenerator.self),
+        .init(type: AndroidGenerator.self),
+        .init(type: HTMLGenerator.self)
+    ]
+
+    static func == (lhs: GeneratorOption, rhs: GeneratorOption) -> Bool {
+        lhs.type == rhs.type
+    }
 }
 
 enum Errors: Error {
@@ -14,12 +26,12 @@ enum Errors: Error {
     case cyclicReference(String)
 }
 
-public struct MakeColors: ParsableCommand {
+public final class MakeColors: ParsableCommand, Context {
     @Argument(help: "The color list to proces")
     var input: String
 
     @Flag(help: "The formatter to use")
-    var formatter = Formatter.ios
+    private var formatter = GeneratorOption.allCases[0]
 
     @Option(help: "Prefix for color names")
     var prefix: String?
@@ -38,18 +50,19 @@ public struct MakeColors: ParsableCommand {
 
         let data = try scanner.colorList()
 
-        print(data)
-
-        switch formatter {
-        case .ios:
-            try writeAssetCatalog(data: data)
-
-        case .android:
-            try writeAndroidXML(data: data)
-
-        case .html:
-            try writeHtmlPreview(data: data)
+        for (key, color) in data.sorted() {
+            let resolved = try data.resolve(key)
+            switch color {
+            case .color: print(key.insertCamelCaseSeparators(), resolved, separator: ": ")
+            case .reference(let r): print("\(key.insertCamelCaseSeparators()) (@\(r.insertCamelCaseSeparators()))", resolved, separator: ": ")
+            }
         }
+
+        let generator = formatter.type.init(context: self)
+        let fileWrapper = try generator.generate(data: data)
+
+        let writeURL = outputURL(extension: formatter.type.defaultExtension)
+        try fileWrapper.write(to: writeURL, options: .atomic, originalContentsURL: nil)
     }
 
     func outputURL(extension: String) -> URL {
@@ -59,270 +72,5 @@ public struct MakeColors: ParsableCommand {
             return URL(fileURLWithPath: input).deletingPathExtension().appendingPathExtension(`extension`)
         }
     }
-
-    func mapColorName(_ name: String) -> String {
-        mapSpaceColorName(name, separator: "_")
-            .replacingOccurrences(of: "/", with: "_")
-            .lowercased()
-    }
-
-    func mapSpaceColorName(_ name: String, separator: String = " ") -> String {
-        name.replacingOccurrences(
-            of: "(?<=[a-z0-9])([A-Z])",
-            with: "\(separator)$1",
-            options: .regularExpression,
-            range: nil
-        )
-    }
-
-    func writeAndroidXML(data: [String: ColorDef]) throws {
-        var xml = """
-        <?xml version="1.0" encoding="utf-8"?>
-        <resources>
-
-        """
-
-        let prefix = self.prefix.map { mapColorName($0) + "_" } ?? ""
-
-        for (key, color) in data.sorted(by: compare) {
-            _ = try data.resolve(key)
-
-            let value: String
-            switch color {
-            case .color(let colorValue): value = colorValue.description
-            case .reference(let ref): value = "@color/\(prefix)\(mapColorName(ref))"
-            }
-
-            xml += """
-                <color name="\(prefix)\(mapColorName(key))">\(value)</color>
-
-            """
-        }
-
-        xml += """
-        </resources>
-        </xml>
-
-        """
-
-        try xml.write(to: outputURL(extension: "xml"), atomically: true, encoding: .utf8)
-    }
-
-    func writeHtmlPreview(data: [String: ColorDef]) throws {
-        var html = """
-        <html>
-        <head>
-            <style type="text/css">
-                .checkered {
-                    padding: 5px;
-                    margin: 5px;
-
-                    background-image:
-                        linear-gradient(45deg, #000 25%, transparent 25%),
-                        linear-gradient(45deg, transparent 75%, #000 75%),
-                        linear-gradient(45deg, transparent 75%, #000 75%),
-                        linear-gradient(45deg, #000 25%, transparent 25%);
-
-                    background-size:30px 30px;
-
-                    background-position:0 0, 0 0, -15px -15px, 15px 15px;
-                }
-            </style>
-        <body>
-        <table>
-            <thead>
-            <tr>
-                <th>&nbsp;</th>
-                <th>Name</th>
-                <th>Value</th>
-            </tr>
-            </thead>
-            <tbody>
-
-        """
-
-        for (key, color) in data.sorted(by: compare) {
-            let actualColor = try data.resolve(key)
-            let value: String
-
-            switch color {
-            case let .reference(name): value = """
-                <a href="#cref/\(name)">\(mapSpaceColorName(name))</a><br>\(actualColor)
-                """
-            case .color: value = actualColor.description
-            }
-
-            html += """
-                <tr>
-                    <td class="checkered" id="cref/\(key)"><span style="background:\(actualColor); width:50px; height:50px;display:inline-block;">&nbsp;&nbsp;</span></td>
-                    <td>\(mapSpaceColorName(key))</td>
-                    <td>\(value)</td>
-                </tr>
-
-            """
-        }
-
-        html += """
-        </table>
-        </body>
-        </html>
-
-        """
-
-        try html.write(to: outputURL(extension: "html"), atomically: true, encoding: .utf8)
-    }
-
-    func writeAssetCatalog(data: [String: ColorDef]) throws {
-        let root = FileWrapper(directoryWithFileWrappers: ["Contents.json" : FileWrapper(catalog)])
-        let colorRoot: FileWrapper
-
-        if let prefix = prefix {
-            let name = mapSpaceColorName(prefix)
-            colorRoot = FileWrapper(directoryWithFileWrappers: ["Contents.json": FileWrapper(group)])
-            colorRoot.filename = name
-            colorRoot.preferredFilename = name
-            root.addFileWrapper(colorRoot)
-        } else {
-            colorRoot = root
-        }
-
-        for key in data.keys {
-            var path = mapSpaceColorName(key).split(separator: "/").map(\.capitalizeFirst)
-            let colorSet = path.removeLast()
-
-            var current = colorRoot
-            for pathSegment in path {
-                if let next = current.fileWrappers?[pathSegment] {
-                    current = next
-                } else {
-                    let next = FileWrapper(directoryWithFileWrappers: ["Contents.json": FileWrapper(group)])
-                    next.filename = pathSegment
-                    next.preferredFilename = pathSegment
-                    _ = current.addFileWrapper(next)
-                    current = next
-                }
-            }
-
-            let colorWrapper = try data.resolve(key).fileWrapper()
-            colorWrapper.filename = "\(colorSet).colorset"
-            colorWrapper.preferredFilename = "\(colorSet).colorset"
-
-            current.addFileWrapper(colorWrapper)
-        }
-
-        let outputUrl = outputURL(extension: "xcassets")
-
-        try root.write(to: outputUrl, options: .atomic, originalContentsURL: nil)
-    }
 }
 
-extension StringProtocol {
-    var capitalizeFirst: String {
-        guard !isEmpty else {
-            return String(self)
-        }
-
-        return prefix(1).uppercased() + dropFirst()
-    }
-}
-
-func compareDef(_ a: ColorDef, _ b: ColorDef) -> ComparisonResult {
-    switch (a, b) {
-    case (.color, .reference): return .orderedAscending
-    case (.reference, .color): return .orderedDescending
-    case (.color, .color), (.reference, .reference): return .orderedSame
-    }
-}
-
-func compare(_ a: (String, ColorDef), b: (String, ColorDef)) -> Bool {
-    switch (compareDef(a.1, b.1)) {
-    case .orderedAscending: return true
-    case .orderedDescending: return false
-    case .orderedSame: return a.0.localizedStandardCompare(b.0) == .orderedAscending
-    }
-}
-
-
-
-
-extension Dictionary where Key == String, Value == ColorDef {
-    func resolve(_ name: String, visited: Set<String> = []) throws -> Color {
-        var visited = visited
-        guard visited.insert(name).inserted else {
-            throw Errors.cyclicReference(name)
-        }
-
-        switch self[name] {
-        case nil:
-            throw Errors.missingReference(name)
-
-        case .color(let color):
-            return color
-
-        case .reference(let referenced):
-            return try resolve(referenced, visited: visited)
-        }
-    }
-
-}
-
-extension Color {
-    func json() -> String {
-        return """
-        {
-        "colors" : [
-            {
-            "color" : {
-                "color-space" : "srgb",
-                "components" : {
-                "alpha" : "\(Float(a) / 256)",
-                "blue" : "0x\(String(b, radix: 16))",
-                "green" : "0x\(String(g, radix: 16))",
-                "red" : "0x\(String(r, radix: 16))"
-                }
-            },
-            "idiom" : "universal"
-            }
-        ],
-        "info" : {
-            "author" : "xcode",
-            "version" : 1
-        }
-        }
-        """
-    }
-
-    func fileWrapper() -> FileWrapper {
-        FileWrapper(directoryWithFileWrappers: [
-            "Contents.json": FileWrapper(json())
-        ])
-    }
-}
-
-extension FileWrapper {
-    convenience init(_ string: String) {
-        self.init(regularFileWithContents: Data(string.utf8))
-    }
-}
-
-let group = """
-{
-  "info" : {
-    "author" : "xcode",
-    "version" : 1
-  },
-  "properties" : {
-    "provides-namespace" : true
-  }
-}
-"""
-
-let catalog = """
-{
-  "info" : {
-    "author" : "xcode",
-    "version" : 1
-  }
-}
-"""
-

Sources/LibMakeColors/Model/Color.swift

@@ -0,0 +1,60 @@
+struct Color: CustomStringConvertible, Equatable {
+    let r, g, b, a: UInt8
+
+    init(r: UInt8, g: UInt8, b: UInt8, a: UInt8 = 0xFF) {
+        self.r = r
+        self.g = g
+        self.b = b
+        self.a = a
+    }
+
+    init?(_ array: [UInt8]) {
+        guard array.count >= 3 else { return nil }
+        r = array[0]
+        g = array[1]
+        b = array[2]
+        a = array.count >= 4 ? array[3] : 0xFF
+    }
+
+    var description: String {
+        return a != 0xFF ? String(format: "#%02X%02X%02X%02X", r, g, b, a): String(format: "#%02X%02X%02X", r, g, b)
+    }
+}
+
+enum ColorDef {
+    case reference(String)
+    case color(Color)
+}
+
+extension Dictionary where Key == String, Value == ColorDef {
+    func resolve(_ name: String, visited: Set<String> = []) throws -> Color {
+        var visited = visited
+        guard visited.insert(name).inserted else {
+            throw Errors.cyclicReference(name)
+        }
+
+        switch self[name] {
+        case nil:
+            throw Errors.missingReference(name)
+
+        case .color(let color):
+            return color
+
+        case .reference(let referenced):
+            return try resolve(referenced, visited: visited)
+        }
+    }
+
+    func sorted() -> [Element] {
+        sorted(by: Self.compare)
+    }
+
+    static func compare(_ a: (String, ColorDef), _ b: (String, ColorDef)) -> Bool {
+        switch (a, b) {
+        case ((_, .color), (_, .reference)): return true
+        case ((_, .reference), (_, .color)): return false
+        case let ((left, _), (right, _)): return left.localizedStandardCompare(right) == .orderedAscending
+        }
+    }
+
+}

Sources/LibMakeColors/Model/Parser.swift

@@ -1,12 +1,11 @@
 import Foundation
 
-
-extension CharacterSet {
+private extension CharacterSet {
     static let hex = CharacterSet(charactersIn: "0123456789abcdef")
     static let name = alphanumerics.union(CharacterSet.init(charactersIn: "_/"))
 }
 
-extension Collection {
+private extension Collection {
     func chunks(size: Int) -> UnfoldSequence<Self.SubSequence, Self.Index> {
         sequence(state: startIndex) { state -> SubSequence? in
             guard state != endIndex else { return nil }