//
//  Feed+CoreDataClass.swift
//  Reader
//
//  Created by Shadowfacts on 1/9/22.
//
//

import Foundation
import CoreData
import Fervor

@objc(Feed)
public class Feed: NSManagedObject {
    
    public func updateFromServer(_ serverFeed: Fervor.Feed) {
        guard self.id == nil || self.id == serverFeed.id else { return }
        self.id = serverFeed.id
        self.title = serverFeed.title
        self.url = serverFeed.url
        self.lastUpdated = serverFeed.lastUpdated
        // todo: check this
        self.removeFromGroups(self.groups!.filtered(using: NSPredicate(format: "NOT id IN %@", serverFeed.groupIDs)) as NSSet)
        let groupsToAddReq = Group.fetchRequest()
        groupsToAddReq.predicate = NSPredicate(format: "id IN %@", serverFeed.groupIDs.filter { g in !self.groups!.contains { ($0 as! Group).id == g } })
        let groupsToAdd = try! self.managedObjectContext!.fetch(groupsToAddReq)
        self.addToGroups(NSSet(array: groupsToAdd))
    }

}