NetNewsWire/Evergreen/MainWindow/Sidebar/SidebarTreeControllerDelega...

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//
// SidebarTreeControllerDelegate.swift
// Evergreen
//
// Created by Brent Simmons on 7/24/16.
// Copyright © 2016 Ranchero Software, LLC. All rights reserved.
//
import Foundation
import RSTree
import Data
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import Account
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final class SidebarTreeControllerDelegate: TreeControllerDelegate {
func treeController(treeController: TreeController, childNodesFor node: Node) -> [Node]? {
if node.isRoot {
return childNodesForRootNode(node)
}
if node.representedObject is Container {
return childNodesForContainerNode(node)
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}
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return nil
}
}
private extension SidebarTreeControllerDelegate {
func childNodesForRootNode(_ rootNode: Node) -> [Node]? {
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// The top-level nodes are pseudo-feeds (All Unread, Starred, etc.) and accounts.
return pseudoFeedNodes(rootNode) + sortedAccountNodes(rootNode)
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}
func pseudoFeedNodes(_ rootNode: Node) -> [Node] {
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// The appDelegates pseudoFeeds are already sorted properly.
return appDelegate.pseudoFeeds.map { rootNode.createChildNode($0) }
}
func childNodesForContainerNode(_ containerNode: Node) -> [Node]? {
let container = containerNode.representedObject as! Container
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var updatedChildNodes = [Node]()
container.children.forEach { (representedObject) in
if let existingNode = containerNode.childNodeRepresentingObject(representedObject) {
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if !updatedChildNodes.contains(existingNode) {
updatedChildNodes += [existingNode]
return
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}
}
if let newNode = self.createNode(representedObject: representedObject, parent: containerNode) {
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updatedChildNodes += [newNode]
}
}
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return updatedChildNodes.sortedAlphabeticallyWithFoldersAtEnd()
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}
func createNode(representedObject: Any, parent: Node) -> Node? {
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if let feed = representedObject as? Feed {
return createNode(feed: feed, parent: parent)
}
if let folder = representedObject as? Folder {
return createNode(folder: folder, parent: parent)
}
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if let account = representedObject as? Account {
return createNode(account: account, parent: parent)
}
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return nil
}
func createNode(feed: Feed, parent: Node) -> Node {
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return parent.createChildNode(feed)
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}
func createNode(folder: Folder, parent: Node) -> Node {
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let node = parent.createChildNode(folder)
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node.canHaveChildNodes = true
return node
}
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func createNode(account: Account, parent: Node) -> Node {
let node = parent.createChildNode(account)
node.canHaveChildNodes = true
node.isGroupItem = true
return node
}
func sortedAccountNodes(_ parent: Node) -> [Node] {
let nodes = AccountManager.shared.accounts.map { createNode(account: $0, parent: parent) }
return nodes.sortedAlphabetically()
}
func nodeInArrayRepresentingObject(_ nodes: [Node], _ representedObject: AnyObject) -> Node? {
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for oneNode in nodes {
if oneNode.representedObject === representedObject {
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return oneNode
}
}
return nil
}
}