---
source: tests/backends_swift_snapshot_test.rs
expression: "&file.content"
---
// Generated by alef. Do not edit by hand.
// swift-format-ignore-file
// This file contains generated FFI glue for trait bridge registration.

import Foundation
import RustBridge

/// Protocol for outbound `ImageProcessor` implementations.
/// Conform your Swift class or struct to this protocol to implement
/// a Rust trait from the host side.
public protocol SwiftImageProcessorBridge: SwiftPluginBridge {
    func processImage(imageBytes: Data, config: String) throws -> String
    func supportsLanguage(lang: String) -> Bool
}

public extension SwiftImageProcessorBridge {
}

/// Internal adapter wrapping a `SwiftImageProcessorBridge` conformer.
/// Marshals Swift types and trait calls to/from the C boundary.
/// Excluded/internal types are serialised to/from JSON strings.
final class SwiftImageProcessorAdapter {
    private let bridge: any SwiftImageProcessorBridge

    init(bridge: any SwiftImageProcessorBridge) {
    self.bridge = bridge
    }

    func processImageCall(imageBytes: Data, config: String) throws -> String {
        do {
    let result = try self.bridge.processImage(imageBytes: imageBytes, config: config)
            let encodedData = try marshal_encode_excluded(result)
    if let jsonString = String(data: encodedData, encoding: .utf8) {
        return "{\"ok\": \(jsonString)}"
    }
    return "{\"ok\": null}"
    } catch {
        return marshal_error_result(error)
    }
    }

    func supportsLanguageCall(lang: String) -> Bool {
        let result = self.bridge.supportsLanguage(lang: lang)
        return result
    }

}

// MARK: - Marshalling helpers

private struct Empty: Codable {}

private func marshal_ok_result<T: Encodable>(_ value: T) -> String {
    let encoder = JSONEncoder()
    if let data = try? encoder.encode(value),
       let jsonString = String(data: data, encoding: .utf8) {
        return "{\"ok\": \(jsonString)}"
    }
    return "{\"ok\": null}"
}

private func marshal_encode_excluded<T: Encodable>(_ value: T) throws -> Data {
    let encoder = JSONEncoder()
    return try encoder.encode(value)
}

private func marshal_error_result(_ error: any Error) -> String {
    let errorString = String(describing: error)
    let encoder = JSONEncoder()
    if let data = try? encoder.encode(errorString),
       let jsonString = String(data: data, encoding: .utf8) {
        return "{\"err\": \(jsonString)}"
    }
    return "{\"err\": \"unknown error\"}"
}
