asdk table view manager

ASTableViewManager.swift

//
//  ASTableViewManager.swift
//  cinch
//
//  Created by Ryan Fitzgerald on 3/9/15.
//  Copyright (c) 2015 cinch. All rights reserved.
//

import Foundation
import RFSectionDelta
import INSPullToRefresh

class ASTableViewManager {
    var batchContext : ASBatchContext?
    
    init() {
        
    }
    
    func attachPullToRefresh(tableView : ASTableView, handler : (scrollView : UIScrollView!) -> Void ) {
        tableView.ins_addPullToRefreshWithHeight(48.0, handler : handler)
        
        let defaultFrame = CGRectMake(0, 0, 24, 24)
        let pullToRefresh = INSDefaultPullToRefresh(frame: defaultFrame, backImage: nil, frontImage: UIImage(named : "pullToRefreshIcon"))
        tableView.ins_pullToRefreshBackgroundView.delegate = pullToRefresh
        
        tableView.ins_pullToRefreshBackgroundView.addSubview(pullToRefresh)
    }
    
    func update(tableView: ASTableView, removedSections: NSIndexSet?, insertedSections: NSIndexSet?, movedSections: [MovedIndex]?) {
        var del = NSMutableIndexSet()
        var add = NSMutableIndexSet()
        
        if let remove = removedSections {
            del.addIndexes(remove)
        }
        
        if let inserts = insertedSections {
            add.addIndexes(inserts)
        }
        
        if del.count == 0 && add.count == 0 {
            if let moves = movedSections {
                for move in moves.reverse() {
                    del.addIndex(move.oldIndex)
                    add.addIndex(move.newIndex)
                }
            }
        }
        
        tableView.beginUpdates()
        
        if del.count > 0 {
            tableView.deleteSections(del, withRowAnimation: .None)
        }
        
        if add.count > 0 {
            tableView.insertSections(add, withRowAnimation: .None)
        }
        
        tableView.endUpdates()
        
        if let context = self.batchContext {
            context.completeBatchFetching(true)
            self.batchContext = nil
        }
    }
}