yattee/Model/FavoritesModel.swift

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import Defaults
import Foundation
struct FavoritesModel {
static let shared = FavoritesModel()
@Default(.favorites) var all
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@Default(.visibleSections) var visibleSections
var isEnabled: Bool {
visibleSections.contains(.favorites)
}
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func contains(_ item: FavoriteItem) -> Bool {
all.contains { $0 == item }
}
func toggle(_ item: FavoriteItem) {
contains(item) ? remove(item) : add(item)
}
func add(_ item: FavoriteItem) {
all.append(item)
}
func remove(_ item: FavoriteItem) {
if let index = all.firstIndex(where: { $0 == item }) {
all.remove(at: index)
}
}
func canMoveUp(_ item: FavoriteItem) -> Bool {
if let index = all.firstIndex(where: { $0 == item }) {
return index > all.startIndex
}
return false
}
func canMoveDown(_ item: FavoriteItem) -> Bool {
if let index = all.firstIndex(where: { $0 == item }) {
return index < all.endIndex - 1
}
return false
}
func moveUp(_ item: FavoriteItem) {
guard canMoveUp(item) else {
return
}
if let from = all.firstIndex(where: { $0 == item }) {
all.move(
fromOffsets: IndexSet(integer: from),
toOffset: from - 1
)
}
}
func moveDown(_ item: FavoriteItem) {
guard canMoveDown(item) else {
return
}
if let from = all.firstIndex(where: { $0 == item }) {
all.move(
fromOffsets: IndexSet(integer: from),
toOffset: from + 2
)
}
}
func addableItems() -> [FavoriteItem] {
let allItems = [
FavoriteItem(section: .subscriptions),
FavoriteItem(section: .popular)
]
return allItems.filter { item in !all.contains { $0.section == item.section } }
}
}