feat: add example app by sirily11 · Pull Request #2 · rxtech-lab/json-render-swift

sirily11 · 2026-04-03T18:31:23Z

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Pull request overview

This PR adds a macOS example app that demonstrates generating JSONRenderSwift Spec JSON via an AI provider and live-rendering it, while also enhancing the core library’s spec/schema guidance and decoding behavior to better support AI-generated JSON.

Changes:

Added Spec.schemaDescription to provide an LLM-friendly schema description for the JSONRenderSwift output format.
Updated UIElement decoding to tolerate missing props by defaulting to an empty dictionary.
Introduced a full Xcode example app project (views, model, AI service integration), plus starter unit/UI test targets and app assets.

Reviewed changes

Copilot reviewed 17 out of 19 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
Sources/JSONRenderSwift/Models/Spec.swift	Adds LLM schema description and custom `UIElement` decoding defaults.
example/example/AIService.swift	Adds AI provider/model factory used by the example app.
example/example/ChatView.swift	Implements the chat UI for prompting UI generation.
example/example/ChatViewModel.swift	Implements streaming generation, JSON extraction, and persistence for the example app.
example/example/ContentView.swift	Main split UI (chat + JSON/live preview).
example/example/PreviewPanel.swift	Adds JSON vs Live Render preview tabs using `JSONRenderer`.
example/example/SettingsView.swift	Adds settings UI for provider, endpoint, API key, and model selection.
example/example/exampleApp.swift	App entry point and macOS Settings scene.
example/example/Assets.xcassets/Contents.json	Adds asset catalog metadata.
example/example/Assets.xcassets/AccentColor.colorset/Contents.json	Adds accent color set metadata.
example/example/Assets.xcassets/AppIcon.appiconset/Contents.json	Adds app icon set metadata.
example/exampleTests/exampleTests.swift	Adds template unit test target source.
example/exampleUITests/exampleUITests.swift	Adds template UI test target source.
example/exampleUITests/exampleUITestsLaunchTests.swift	Adds UI test launch/screenshot template.
example/example.xcodeproj/project.pbxproj	Adds Xcode project configuration and package dependencies.
example/example.xcodeproj/project.xcworkspace/contents.xcworkspacedata	Adds workspace metadata.
example/example.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved	Pins SwiftPM dependencies for the example project.
example/appicon.icon/icon.json	Adds Icon Composer configuration for the app icon.
example/appicon.icon/Assets/json-render-avatar-icon-1024x1024.png	Adds the source image used to generate the app icon.

Files not reviewed (1)

example/example.xcodeproj/project.xcworkspace/contents.xcworkspacedata: Language not supported

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Copilot · 2026-04-03T18:35:09Z

Sources/JSONRenderSwift/Models/Spec.swift

+        on = try container.decodeIfPresent([String: ActionBindingOrArray].self, forKey: .on)
+        `repeat` = try container.decodeIfPresent(RepeatConfig.self, forKey: .repeat)
+    }
+


UIElement now implements init(from:) while still conforming to Codable, but there is no corresponding encode(to:). In Swift, providing a custom init(from:) prevents automatic synthesis of encode(to:), so this will break compilation unless encode(to:) is added (or the conformance is changed to Decodable).

Suggested change

public func encode(to encoder: Encoder) throws {

var container = encoder.container(keyedBy: CodingKeys.self)

try container.encode(type, forKey: .type)

try container.encode(props, forKey: .props)

try container.encodeIfPresent(children, forKey: .children)

try container.encodeIfPresent(visible, forKey: .visible)

try container.encodeIfPresent(on, forKey: .on)

try container.encodeIfPresent(`repeat`, forKey: .repeat)

}

Copilot · 2026-04-03T18:35:09Z

example/example/SettingsView.swift

+struct SettingsView: View {
+    @AppStorage("providerType") private var providerType: String = AIProviderType.openai.rawValue
+    @AppStorage("apiEndpoint") private var apiEndpoint: String = ""
+    @AppStorage("apiKey") private var apiKey: String = ""
+    @AppStorage("modelName") private var modelName: String = ""


The API key is persisted via @AppStorage("apiKey") (UserDefaults) which stores the value in plaintext on disk. For real credentials, prefer storing/retrieving from Keychain (and keep @AppStorage only for non-sensitive settings).

Copilot · 2026-04-03T18:35:09Z

example/example/ChatViewModel.swift

+        let state = PersistedState(messages: messages, currentJSON: currentJSON)
+        do {
+            let data = try JSONEncoder().encode(state)
+            try data.write(to: Self.stateFileURL)


saveState() writes directly to the target file without .atomic/temp-file semantics. If the app is terminated mid-write, the JSON can be corrupted and subsequent loads will fail. Consider using data.write(to:options: .atomic) (and/or writing to a temporary file then moving).

Suggested change

try data.write(to: Self.stateFileURL)

try data.write(to: Self.stateFileURL, options: .atomic)

Copilot · 2026-04-03T18:35:10Z

example/example/ChatViewModel.swift

+        } catch {
+            // No saved state or failed to load - start fresh
+            print("[ChatViewModel] No saved state or failed to load: \(error)")


loadState() logs an error for the common “file not found” case, which will add noise on first launch. Consider handling the “no such file” error separately (silently start fresh) and only logging unexpected decoding/IO errors.

Suggested change

} catch {

// No saved state or failed to load - start fresh

print("[ChatViewModel] No saved state or failed to load: \(error)")

} catch let error as CocoaError where error.code == .fileReadNoSuchFile {

// No saved state yet - start fresh silently

} catch {

// Failed to read or decode saved state - start fresh and log the unexpected error

print("[ChatViewModel] Failed to load state: \(error)")

Copilot · 2026-04-03T18:35:10Z

example/example.xcodeproj/project.pbxproj

+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = dwarf;
+				DEVELOPMENT_TEAM = P9KK452K8P;


The project file hard-codes a specific DEVELOPMENT_TEAM value. This commonly prevents other contributors from building/signing the example app without editing the project. Consider removing the team ID from the checked-in project (or using a build setting override / leaving it blank).

Suggested change

DEVELOPMENT_TEAM = P9KK452K8P;

Copilot · 2026-04-03T18:35:10Z

example/example.xcodeproj/project.pbxproj

+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
+				MACOSX_DEPLOYMENT_TARGET = 26.2;


MACOSX_DEPLOYMENT_TARGET is set to 26.2 in the project. Please verify this is the intended minimum supported macOS version, since an overly high deployment target will make the example app impossible to build/run on most systems and CI images.

Suggested change

MACOSX_DEPLOYMENT_TARGET = 26.2;

MACOSX_DEPLOYMENT_TARGET = 13.0;

feat: add example app

c6eb942

Copilot AI review requested due to automatic review settings April 3, 2026 18:31

sirily11 enabled auto-merge (squash) April 3, 2026 18:31

autopilot-project-manager bot added the enhancement New feature or request label Apr 3, 2026

Copilot started reviewing on behalf of sirily11 April 3, 2026 18:32 View session

sirily11 merged commit facfd0a into main Apr 3, 2026
3 checks passed

sirily11 deleted the example branch April 3, 2026 18:32

Copilot AI reviewed Apr 3, 2026

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feat: add example app#2

feat: add example app#2
sirily11 merged 1 commit intomainfrom
example

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+    public func encode(to encoder: Encoder) throws {
+        var container = encoder.container(keyedBy: CodingKeys.self)
+        try container.encode(type, forKey: .type)
+        try container.encode(props, forKey: .props)
+        try container.encodeIfPresent(children, forKey: .children)
+        try container.encodeIfPresent(visible, forKey: .visible)
+        try container.encodeIfPresent(on, forKey: .on)
+        try container.encodeIfPresent(`repeat`, forKey: .repeat)
+    }

	try data.write(to: Self.stateFileURL)
	try data.write(to: Self.stateFileURL, options: .atomic)

	MACOSX_DEPLOYMENT_TARGET = 26.2;
	MACOSX_DEPLOYMENT_TARGET = 13.0;

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Pull request overview

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