Gemini/Gemini-iOS/Intents/UserActivities.swift

//
//  UserActivities.swift
//  Gemini-iOS
//
//  Created by Shadowfacts on 9/28/21.
//

import Foundation
import BrowserCore

private let browseType = "space.vaccor.Gemini.activity.browse"
private let homepageType = "space.vaccor.Gemini.activity.homepage"
private let encoder = PropertyListEncoder()
private let decoder = PropertyListDecoder()

extension NSUserActivity {
    static func homepage() -> NSUserActivity {
        return NSUserActivity(activityType: homepageType)
    }
    
    convenience init(geminiURL url: URL) {
        self.init(activityType: browseType)
        self.userInfo = [
            "url": url,
        ]
    }
    
    convenience init(navigationManager manager: NavigationManager) {
        self.init(activityType: browseType)
        self.userInfo = [
            "url": manager.currentURL,
        ]
        if let data = try? encoder.encode(manager) {
            self.userInfo!["manager"] = data
        }
    }
    
    var navigationManager: NavigationManager? {
        guard activityType == browseType,
              let data = userInfo?["manager"] as? Data,
              let manager = try? decoder.decode(NavigationManager.self, from: data) else { return nil }
        return manager
    }
    
    var geminiURL: URL? {
        guard activityType == browseType,
              let url = userInfo?["url"] as? URL else { return nil }
        return url
    }
    
    var isHomepage: Bool {
        return activityType == homepageType
    }
}