Add editor types for JSON, arrays, and case iterable strings and ints (#14)

Author: prachigauriar

App/Sources/App/ContentViewModel.swift

@@ -38,7 +38,7 @@ final class ContentViewModel {
     let jsonVariable = ConfigVariable(
         key: "complexConfig",
         defaultValue: ComplexConfiguration(field1: "a", field2: 1),
-        content: .json(representation: .data)
+        content: .json(representation: .string())
     ).metadata(\.displayName, "Complex Config")
 
     let intBackedVariable = ConfigVariable(key: "favoriteCardSuit", defaultValue: CardSuit.spades, isSecret: true)
@@ -96,15 +96,15 @@ struct ComplexConfiguration: Codable, Hashable, Sendable {
 }
 
 
-enum Beatle: String, Codable, Hashable, Sendable {
+enum Beatle: String, CaseIterable, Codable, Hashable, Sendable {
     case john = "John"
     case paul = "Paul"
     case george = "George"
     case ringo = "Ringo"
 }
 
 
-enum CardSuit: Int, Codable, Hashable, Sendable {
+enum CardSuit: Int, CaseIterable, Codable, Hashable, Sendable {
     case spades
     case hearts
     case clubs

Sources/DevConfiguration/Core/CodableValueRepresentation.swift

@@ -47,6 +47,16 @@ public struct CodableValueRepresentation: Sendable {
         CodableValueRepresentation(kind: .data)
     }
 
+    /// Whether this representation supports text-based editing in the editor UI.
+    ///
+    /// String-backed representations can be edited as text, while data-backed representations cannot.
+    var supportsTextEditing: Bool {
+        switch kind {
+        case .string: true
+        case .data: false
+        }
+    }
+
 
     /// Reads raw data synchronously from the reader based on this representation.
     ///
@@ -129,6 +139,30 @@ public struct CodableValueRepresentation: Sendable {
     }
 
 
+    /// Extracts raw `Data` from a ``ConfigContent`` based on this representation.
+    ///
+    /// This is the reverse of ``encodeToContent(_:)``. For string-backed representations, this extracts the string and
+    /// converts it to `Data` using the representation's encoding. For data-backed representations, this extracts the
+    /// byte array and wraps it in `Data`.
+    ///
+    /// - Parameter content: The content to extract data from.
+    /// - Returns: The raw data, or `nil` if the content doesn't match this representation's expected case.
+    func data(from content: ConfigContent) -> Data? {
+        switch kind {
+        case .string(let encoding):
+            guard case .string(let string) = content else {
+                return nil
+            }
+            return string.data(using: encoding)
+        case .data:
+            guard case .bytes(let bytes) = content else {
+                return nil
+            }
+            return Data(bytes)
+        }
+    }
+
+
     /// Watches for raw data changes from the reader based on this representation.
     ///
     /// Each time the underlying configuration value changes, `onUpdate` is called with the new raw data (or `nil` if the

Sources/DevConfiguration/Core/ConfigVariable.swift

@@ -280,6 +280,28 @@ extension ConfigVariable {
 }
 
 
+extension ConfigVariable {
+    /// Creates a `RawRepresentable<String> & CaseIterable` configuration variable.
+    ///
+    /// Content is set to ``ConfigVariableContent/rawRepresentableCaseIterableString()`` automatically. Uses a picker
+    /// control populated with all cases instead of a free-text field.
+    ///
+    /// - Parameters:
+    ///   - key: The configuration key.
+    ///   - defaultValue: The default value to use when variable resolution fails.
+    ///   - isSecret: Whether this variable's value should be treated as secret. Defaults to `false`.
+    public init(key: ConfigKey, defaultValue: Value, isSecret: Bool = false)
+    where Value: RawRepresentable & CaseIterable & Sendable, Value.RawValue == String {
+        self.init(
+            key: key,
+            defaultValue: defaultValue,
+            content: .rawRepresentableCaseIterableString(),
+            isSecret: isSecret
+        )
+    }
+}
+
+
 extension ConfigVariable {
     /// Creates a `[RawRepresentable<String>]` configuration variable.
     ///
@@ -348,6 +370,23 @@ extension ConfigVariable {
 }
 
 
+extension ConfigVariable {
+    /// Creates a `RawRepresentable<Int> & CaseIterable` configuration variable.
+    ///
+    /// Content is set to ``ConfigVariableContent/rawRepresentableCaseIterableInt()`` automatically. Uses a picker
+    /// control populated with all cases instead of a free-text number field.
+    ///
+    /// - Parameters:
+    ///   - key: The configuration key.
+    ///   - defaultValue: The default value to use when variable resolution fails.
+    ///   - isSecret: Whether this variable's value should be treated as secret. Defaults to `false`.
+    public init(key: ConfigKey, defaultValue: Value, isSecret: Bool = false)
+    where Value: RawRepresentable & CaseIterable & Sendable, Value.RawValue == Int {
+        self.init(key: key, defaultValue: defaultValue, content: .rawRepresentableCaseIterableInt(), isSecret: isSecret)
+    }
+}
+
+
 extension ConfigVariable {
     /// Creates a `[RawRepresentable<Int>]` configuration variable.
     ///