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Changeset.swift
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Changeset.swift
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//
// Changeset.swift
// SwiftGoal
//
// Created by Martin Richter on 01/06/15.
// Copyright (c) 2015 Martin Richter. All rights reserved.
//
import Foundation
public struct Changeset {
public let deletions: [NSIndexPath]
public let insertions: [NSIndexPath]
public init<T: Equatable>(oldItems: [T], newItems: [T]) {
// Find index paths for deleted items
var deletions: [NSIndexPath] = []
for (index, item) in enumerate(oldItems) {
if !contains(newItems, item) {
deletions.append(NSIndexPath(forRow: index, inSection: 0))
}
}
// TODO: Compare edited changes within matches
// Find index paths for newly inserted items
var insertions: [NSIndexPath] = []
for (index, item) in enumerate(newItems) {
if !contains(oldItems, item) {
insertions.append(NSIndexPath(forRow: index, inSection: 0))
}
}
self.init(deletions: deletions, insertions: insertions)
}
private init(deletions: [NSIndexPath], insertions: [NSIndexPath]) {
self.deletions = deletions
self.insertions = insertions
}
}