SideStore/AltStore/Operations/VerifyAppOperation.swift

//
//  VerifyAppOperation.swift
//  AltStore
//
//  Created by Riley Testut on 5/2/20.
//  Copyright © 2020 Riley Testut. All rights reserved.
//

import Foundation

import AltStoreCore
import AltSign
import Roxas

@objc(VerifyAppOperation)
class VerifyAppOperation: ResultOperation<Void>
{
    let context: AppOperationContext
    var verificationHandler: ((VerificationError) -> Bool)?
    
    init(context: AppOperationContext)
    {
        self.context = context
        
        super.init()
    }
    
    override func main()
    {
        super.main()
        
        do
        {
            if let error = self.context.error
            {
                throw error
            }
            
            let appName = self.context.app?.name ?? NSLocalizedString("The app", comment: "")
            self.localizedFailure = String(format: NSLocalizedString("%@ could not be installed.", comment: ""), appName)
            
            guard let app = self.context.app else { throw OperationError.invalidParameters }
            
            guard app.bundleIdentifier == self.context.bundleIdentifier else {
                throw VerificationError.mismatchedBundleIdentifiers(sourceBundleID: self.context.bundleIdentifier, app: app)
            }
            
            guard ProcessInfo.processInfo.isOperatingSystemAtLeast(app.minimumiOSVersion) else {
                throw VerificationError.iOSVersionNotSupported(app: app, requiredOSVersion: app.minimumiOSVersion)
            }
            
            self.finish(.success(()))
        }
        catch
        {
            self.finish(.failure(error))
        }
    }
}