legacy/swift/Sources/PiranhaKit/InputCommand/Validators/CleanupStaleFlagsCommandInputValidator.swift

/**
 *    Copyright (c) 2019 Uber Technologies, Inc.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

import Foundation
import ArgumentParser

struct CleanupStaleFlagsCommandInputValidator {
    
    private let configProvider: PiranhaConfigProviding
    
    init(configProvider: PiranhaConfigProviding = PiranhaConfigProviderDefaultImpl()) {
        self.configProvider = configProvider
    }
    
    func validateInput(sourceFileURL: URL?,
                       configFileURL: URL?,
                       flag: String,
                       fileManager: FileManager) throws {
        guard let sourceFileURL = sourceFileURL,
              fileManager.fileExists(atPath: sourceFileURL.path) else {
            throw ValidationError("Please provide valid source file path")
        }
        
        guard let configFileURL = configFileURL,
              fileManager.fileExists(atPath: configFileURL.path) else {
            throw ValidationError("Please provide valid config file path")
        }
        
        _ = try configProvider.config(fromFileURL: configFileURL)
        
        
        guard !flag.isEmpty else {
            throw ValidationError("Please provide valid flag name")
        }
    }
}