88 lines
2.8 KiB
Swift
88 lines
2.8 KiB
Swift
//
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// MasterFeedDataSource.swift
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// NetNewsWire-iOS
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//
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// Created by Maurice Parker on 8/28/19.
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// Copyright © 2019 Ranchero Software. All rights reserved.
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//
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import UIKit
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import RSCore
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import RSTree
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import Account
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class MasterFeedDataSource<SectionIdentifierType, ItemIdentifierType>: UITableViewDiffableDataSource<SectionIdentifierType, ItemIdentifierType> where SectionIdentifierType : Hashable, ItemIdentifierType : Hashable {
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private var coordinator: AppCoordinator!
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private var errorHandler: ((Error) -> ())!
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init(coordinator: AppCoordinator, errorHandler: @escaping (Error) -> (), tableView: UITableView, cellProvider: @escaping UITableViewDiffableDataSource<SectionIdentifierType, ItemIdentifierType>.CellProvider) {
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super.init(tableView: tableView, cellProvider: cellProvider)
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self.coordinator = coordinator
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self.errorHandler = errorHandler
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}
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override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
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guard let node = coordinator.nodeFor(indexPath), !(node.representedObject is PseudoFeed) else {
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return false
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}
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return true
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}
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override func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
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guard let node = coordinator.nodeFor(indexPath) else {
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return false
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}
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return node.representedObject is Feed
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}
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override func tableView(_ tableView: UITableView, moveRowAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) {
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guard let sourceNode = coordinator.nodeFor(sourceIndexPath), let feed = sourceNode.representedObject as? Feed else {
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return
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}
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// Based on the drop we have to determine a node to start looking for a parent container.
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let destNode: Node = {
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if destinationIndexPath.row == 0 {
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return coordinator.rootNode.childAtIndex(destinationIndexPath.section)!
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} else {
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let movementAdjustment = sourceIndexPath > destinationIndexPath ? 1 : 0
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let adjustedDestIndexPath = IndexPath(row: destinationIndexPath.row - movementAdjustment, section: destinationIndexPath.section)
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return coordinator.nodeFor(adjustedDestIndexPath)!
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}
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}()
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// Now we start looking for the parent container
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let destParentNode: Node? = {
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if destNode.representedObject is Container {
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return destNode
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} else {
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if destNode.parent?.representedObject is Container {
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return destNode.parent!
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} else {
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return nil
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}
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}
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}()
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// Move the Feed
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guard let source = sourceNode.parent?.representedObject as? Container, let destination = destParentNode?.representedObject as? Container else {
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return
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}
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BatchUpdate.shared.start()
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source.account?.moveFeed(feed, from: source, to: destination) { result in
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switch result {
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case .success:
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BatchUpdate.shared.end()
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case .failure(let error):
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self.errorHandler(error)
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}
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}
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}
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}
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