yattee/Model/Search/SearchModel.swift

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4.5 KiB
Swift
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import Defaults
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import Repeat
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import Siesta
import SwiftUI
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final class SearchModel: ObservableObject {
static var shared = SearchModel()
@Published var store = Store<[ContentItem]>()
@Published var page: SearchPage?
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@Published var query = SearchQuery()
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@Published var queryText = ""
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@Published var suggestionsText = ""
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@Published var querySuggestions = [String]()
private var suggestionsDebouncer = Debouncer(.milliseconds(200))
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@Published var focused = false
var accounts: AccountsModel { .shared }
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private var resource: Resource!
init() {
#if os(iOS)
addKeyboardDidHideNotificationObserver()
#endif
}
deinit {
#if os(iOS)
removeKeyboardDidHideNotificationObserver()
#endif
}
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var isLoading: Bool {
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resource?.isLoading ?? false
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}
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func reloadQuery() {
changeQuery()
}
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func changeQuery(_ changeHandler: @escaping (SearchQuery) -> Void = { _ in }) {
changeHandler(query)
page = nil
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if !query.isEmpty {
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resource = accounts.api.search(query, page: nil)
resource.addObserver(store)
loadResource()
}
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}
func resetQuery(_ query: SearchQuery = SearchQuery()) {
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self.query = query
let newResource = accounts.api.search(query, page: nil)
guard newResource != resource else {
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return
}
page = nil
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store.replace([])
if !query.isEmpty {
resource = newResource
resource.addObserver(store)
loadResource()
}
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}
func loadResource() {
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let currentResource = resource!
resource.load().onSuccess { response in
if let page: SearchPage = response.typedContent() {
self.page = page
self.replace(page.results, for: currentResource)
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}
}
}
func replace(_ items: [ContentItem], for resource: Resource) {
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if self.resource == resource {
store = Store<[ContentItem]>(items)
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}
}
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var suggestionsResource: Resource? { didSet {
oldValue?.cancelLoadIfUnobserved()
objectWillChange.send()
}}
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func loadSuggestions(_ query: String) {
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guard accounts.app.supportsSearchSuggestions else {
querySuggestions.removeAll()
return
}
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suggestionsDebouncer.callback = {
guard !query.isEmpty else { return }
DispatchQueue.main.async {
self.accounts.api.searchSuggestions(query: query).load().onSuccess { response in
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if let suggestions: [String] = response.typedContent() {
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self.querySuggestions = suggestions
} else {
self.querySuggestions = []
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}
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self.suggestionsText = query
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}
}
}
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suggestionsDebouncer.call()
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}
func loadNextPage() {
guard var pageToLoad = page, !pageToLoad.last else {
return
}
if pageToLoad.nextPage.isNil, accounts.app.searchUsesIndexedPages {
pageToLoad.nextPage = "2"
}
resource?.removeObservers(ownedBy: store)
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resource = accounts.api.search(query, page: pageToLoad.nextPage)
resource.addObserver(store)
resource
.load()
.onSuccess { response in
if let page: SearchPage = response.typedContent() {
var nextPage: Int?
if self.accounts.app.searchUsesIndexedPages {
nextPage = Int(pageToLoad.nextPage ?? "0")
}
self.page = page
if self.accounts.app.searchUsesIndexedPages {
self.page?.nextPage = String((nextPage ?? 1) + 1)
}
self.replace(self.store.collection + page.results, for: self.resource)
}
}
}
#if os(iOS)
private func addKeyboardDidHideNotificationObserver() {
NotificationCenter.default.addObserver(self, selector: #selector(onKeyboardDidHide), name: UIResponder.keyboardDidHideNotification, object: nil)
}
@objc func onKeyboardDidHide() {
focused = false
}
private func removeKeyboardDidHideNotificationObserver() {
NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardDidHideNotification, object: nil)
}
#endif
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}