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Rewrote lots of bad "async" code

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Code that should've been fully async that was not previously actually async, such as the networking code, is now actually async. This makes it much easier to read and means that it makes a lot more sense in the context of the program. This also means that all uses of DispatchQueue.main.sync{} and DispatchQueue.main.async{} are now gone.
DetailView's fetching code benefitted the most from these changes, and is now just one iterative function instead of two cursed functions involving callbacks. As a result, you can now also pull down on the detail view to refresh the data, which is handy. Note that occupancy isn't updated when doing this currently due to a task issue I haven't figured out yet, but you can just go back out and in to update that anyway.
ContentView will also now automatically refresh the data if the last refreshed date is no longer today, so if you let the app sit in the background and then focus it, dates should automatically update to being for today.
This commit is contained in:
Campbell 2025-10-01 00:13:55 -04:00
parent 059209c9e5
commit f01c041885
Signed by: NinjaCheetah
GPG Key ID: 39C2500E1778B156
5 changed files with 220 additions and 245 deletions
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4
RIT Dining.xcodeproj/project.pbxproj
View File

@ -257,7 +257,7 @@
ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
CODE_SIGN_IDENTITY = "Apple Development";
CODE_SIGN_STYLE = Automatic;
CURRENT_PROJECT_VERSION = 12;
CURRENT_PROJECT_VERSION = 13;
DEVELOPMENT_TEAM = 5GF7GKNTK4;
ENABLE_PREVIEWS = YES;
GENERATE_INFOPLIST_FILE = YES;
@ -291,7 +291,7 @@
ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
CODE_SIGN_IDENTITY = "Apple Development";
CODE_SIGN_STYLE = Automatic;
CURRENT_PROJECT_VERSION = 12;
CURRENT_PROJECT_VERSION = 13;
DEVELOPMENT_TEAM = 5GF7GKNTK4;
ENABLE_PREVIEWS = YES;
GENERATE_INFOPLIST_FILE = YES;

152
RIT Dining/ContentView.swift
View File

@ -7,6 +7,71 @@
import SwiftUI
// This view handles the actual location list, because having it inside ContentView was too complex (both visually and for the
// type checker too, apparently).
struct LocationList: View {
@State var filteredLocations: [DiningLocation]
@Environment(Favorites.self) var favorites
var body: some View {
ForEach($filteredLocations) { $location in
NavigationLink(destination: DetailView(location: $location)) {
VStack(alignment: .leading) {
HStack {
Text(location.name)
if favorites.contains(location) {
Image(systemName: "star.fill")
.foregroundStyle(.yellow)
}
}
switch location.open {
case .open:
Text("Open")
.foregroundStyle(.green)
case .closed:
Text("Closed")
.foregroundStyle(.red)
case .openingSoon:
Text("Opening Soon")
.foregroundStyle(.orange)
case .closingSoon:
Text("Closing Soon")
.foregroundStyle(.orange)
}
if let times = location.diningTimes, !times.isEmpty {
ForEach(times, id: \.self) { time in
Text("\(dateDisplay.string(from: time.openTime)) - \(dateDisplay.string(from: time.closeTime))")
.foregroundStyle(.secondary)
}
} else {
Text("Not Open Today")
.foregroundStyle(.secondary)
}
}
}
.swipeActions {
Button(action: {
withAnimation {
if favorites.contains(location) {
favorites.remove(location)
} else {
favorites.add(location)
}
}
}) {
if favorites.contains(location) {
Label("Unfavorite", systemImage: "star")
} else {
Label("Favorite", systemImage: "star")
}
}
.tint(favorites.contains(location) ? .yellow : nil)
}
}
}
}
struct ContentView: View {
// Save sort/filter options in AppStorage so that they actually get saved.
@AppStorage("openLocationsOnly") var openLocationsOnly: Bool = false
@ -29,20 +94,18 @@ struct ContentView: View {
// Asynchronously fetch the data for all of the locations and parse their data to display it.
private func getDiningData() async {
var newDiningLocations: [DiningLocation] = []
getAllDiningInfo(date: nil) { result in
switch result {
case .success(let locations):
for i in 0..<locations.locations.count {
let diningInfo = parseLocationInfo(location: locations.locations[i], forDate: nil)
newDiningLocations.append(diningInfo)
}
diningLocations = newDiningLocations
lastRefreshed = Date()
isLoading = false
case .failure(let error):
print(error)
loadFailed = true
switch await getAllDiningInfo(date: nil) {
case .success(let locations):
for i in 0..<locations.locations.count {
let diningInfo = parseLocationInfo(location: locations.locations[i], forDate: nil)
newDiningLocations.append(diningInfo)
}
diningLocations = newDiningLocations
lastRefreshed = Date()
isLoading = false
case .failure(let error):
print(error)
loadFailed = true
}
}
@ -54,6 +117,13 @@ struct ContentView: View {
for location in diningLocations.indices {
diningLocations[location].updateOpenStatus()
}
// If the last refreshed date isn't today, that means we probably passed midnight and need to refresh the data.
// So do that.
if !Calendar.current.isDateInToday(lastRefreshed ?? Date()) {
Task {
await getDiningData()
}
}
}
}
@ -142,61 +212,7 @@ struct ContentView: View {
}
})
Section(content: {
ForEach(filteredLocations, id: \.self) { location in
NavigationLink(destination: DetailView(location: location)) {
VStack(alignment: .leading) {
HStack {
Text(location.name)
if favorites.contains(location) {
Image(systemName: "star.fill")
.foregroundStyle(.yellow)
}
}
switch location.open {
case .open:
Text("Open")
.foregroundStyle(.green)
case .closed:
Text("Closed")
.foregroundStyle(.red)
case .openingSoon:
Text("Opening Soon")
.foregroundStyle(.orange)
case .closingSoon:
Text("Closing Soon")
.foregroundStyle(.orange)
}
if let times = location.diningTimes, !times.isEmpty {
ForEach(times, id: \.self) { time in
Text("\(dateDisplay.string(from: time.openTime)) - \(dateDisplay.string(from: time.closeTime))")
.foregroundStyle(.secondary)
}
} else {
Text("Not Open Today")
.foregroundStyle(.secondary)
}
}
}
.swipeActions {
Button(action: {
withAnimation {
if favorites.contains(location) {
favorites.remove(location)
} else {
favorites.add(location)
}
}
}) {
if favorites.contains(location) {
Label("Unfavorite", systemImage: "star")
} else {
Label("Favorite", systemImage: "star")
}
}
.tint(favorites.contains(location) ? .yellow : nil)
}
}
LocationList(filteredLocations: filteredLocations)
}, footer: {
if let lastRefreshed {
VStack(alignment: .center) {

143
RIT Dining/Data/FetchData.swift
View File

@ -11,117 +11,88 @@ enum InvalidHTTPError: Error {
case invalid
}
// This API requesting code came from another project of mine and was used to fetch the GitHub API for update checking. I just copied it
// here, but it can probably be made simpler for this use case.
// This code has now been mostly rewritten to be pretty and async instead of being horrifying callback based code in a context where
// callback based code made no sense. I love async!
// Get information for all dining locations.
func getAllDiningInfo(date: String?, completionHandler: @escaping (Result<DiningLocationsParser, Error>) -> Void) {
func getAllDiningInfo(date: String?) async -> Result<DiningLocationsParser, Error> {
// The endpoint requires that you specify a date, so get today's.
let date_string: String = date ?? getAPIFriendlyDateString(date: Date())
let url_string = "https://tigercenter.rit.edu/tigerCenterApi/tc/dining-all?date=\(date_string)"
let dateString: String = date ?? getAPIFriendlyDateString(date: Date())
let urlString = "https://tigercenter.rit.edu/tigerCenterApi/tc/dining-all?date=\(dateString)"
guard let url = URL(string: url_string) else {
print("Invalid URL")
return
guard let url = URL(string: urlString) else {
return .failure(URLError(.badURL))
}
let request = URLRequest(url: url)
URLSession.shared.dataTask(with: request) { data, response, error in
if let error = error {
completionHandler(.failure(error))
return
do {
let (data, response) = try await URLSession.shared.data(from: url)
guard let httpResponse = response as? HTTPURLResponse,
(200...299).contains(httpResponse.statusCode) else {
return .failure(InvalidHTTPError.invalid)
}
guard let data = data else {
completionHandler(.failure(URLError(.badServerResponse)))
return
}
guard let httpResponse = response as? HTTPURLResponse, (200...299).contains(httpResponse.statusCode) else {
completionHandler(.failure(InvalidHTTPError.invalid))
return
}
let decoded: Result<DiningLocationsParser, Error> = Result(catching: { try JSONDecoder().decode(DiningLocationsParser.self, from: data) })
completionHandler(decoded)
}.resume()
let decoded = try JSONDecoder().decode(DiningLocationsParser.self, from: data)
return .success(decoded)
} catch {
return .failure(error)
}
}
// Get information for just one dining location based on its location ID.
func getSingleDiningInfo(date: String?, locationId: Int, completionHandler: @escaping (Result<DiningLocationParser, Error>) -> Void) {
func getSingleDiningInfo(date: String?, locId: Int) async -> Result<DiningLocationParser, Error> {
// The current date and the location ID are required to get information for just one location.
let date_string: String = date ?? getAPIFriendlyDateString(date: Date())
let url_string = "https://tigercenter.rit.edu/tigerCenterApi/tc/dining-single?date=\(date_string)&locId=\(locationId)"
print("making request to \(url_string)")
let dateString: String = date ?? getAPIFriendlyDateString(date: Date())
let urlString = "https://tigercenter.rit.edu/tigerCenterApi/tc/dining-single?date=\(dateString)&locId=\(locId)"
print("making request to \(urlString)")
guard let url = URL(string: url_string) else {
print("Invalid URL")
return
guard let url = URL(string: urlString) else {
return .failure(URLError(.badURL))
}
let request = URLRequest(url: url)
URLSession.shared.dataTask(with: request) { data, response, error in
if let error = error {
completionHandler(.failure(error))
return
do {
let (data, response) = try await URLSession.shared.data(from: url)
guard let httpResponse = response as? HTTPURLResponse,
(200...299).contains(httpResponse.statusCode) else {
return .failure(InvalidHTTPError.invalid)
}
guard let data = data else {
completionHandler(.failure(URLError(.badServerResponse)))
return
}
guard let httpResponse = response as? HTTPURLResponse, (200...299).contains(httpResponse.statusCode) else {
completionHandler(.failure(InvalidHTTPError.invalid))
return
}
let decoded: Result<DiningLocationParser, Error> = Result(catching: { try JSONDecoder().decode(DiningLocationParser.self, from: data) })
completionHandler(decoded)
}.resume()
let decoded = try JSONDecoder().decode(DiningLocationParser.self, from: data)
return .success(decoded)
} catch {
return .failure(error)
}
}
// Get the occupancy information for a location using its MDO ID, whatever that stands for. This ID is provided alongside the other main
// ID in the data returned by the TigerCenter API.
func getOccupancyPercentage(mdoId: Int, completionHandler: @escaping (Result<Double, Error>) -> Void) {
// Get the occupancy information for a location using its MDO ID, whatever that stands for. This ID is provided alongside the other
// main ID in the data returned by the TigerCenter API.
func getOccupancyPercentage(mdoId: Int) async -> Result<Double, Error> {
let urlString = "https://maps.rit.edu/proxySearch/densityMapDetail.php?mdo=\(mdoId)"
print("making request to \(urlString)")
guard let url = URL(string: urlString) else {
print("Invalid URL")
return
return .failure(URLError(.badURL))
}
let occRequest = URLRequest(url: url)
URLSession.shared.dataTask(with: occRequest) { data, response, error in
if let error = error {
completionHandler(.failure(error))
return
do {
let (data, response) = try await URLSession.shared.data(from: url)
guard let httpResponse = response as? HTTPURLResponse,
(200...299).contains(httpResponse.statusCode) else {
return .failure(InvalidHTTPError.invalid)
}
guard let data = data else {
completionHandler(.failure(URLError(.badServerResponse)))
return
let occupancy = try JSONDecoder().decode([DiningOccupancyParser].self, from: data)
if !occupancy.isEmpty {
print("current occupancy: \(occupancy[0].count)")
print("maximum occupancy: \(occupancy[0].max_occ)")
let occupancyPercentage = Double(occupancy[0].count) / Double(occupancy[0].max_occ) * 100
print("occupancy percentage: \(occupancyPercentage)%")
return .success(occupancyPercentage)
} else {
return .failure(DecodingError.dataCorrupted(DecodingError.Context(codingPath: [], debugDescription: "Failed to decode JSON")))
}
guard let httpResponse = response as? HTTPURLResponse, (200...299).contains(httpResponse.statusCode) else {
completionHandler(.failure(InvalidHTTPError.invalid))
return
}
do {
let occupancy = try JSONDecoder().decode([DiningOccupancyParser].self, from: data)
if !occupancy.isEmpty {
print("current occupancy: \(occupancy[0].count)")
print("maximum occupancy: \(occupancy[0].max_occ)")
let occupancyPercentage = Double(occupancy[0].count) / Double(occupancy[0].max_occ) * 100
print("occupancy percentage: \(occupancyPercentage)%")
completionHandler(.success(occupancyPercentage))
} else {
completionHandler(.failure(DecodingError.dataCorrupted(DecodingError.Context(codingPath: [], debugDescription: "Failed to decode JSON"))))
}
} catch {
completionHandler(.failure(DecodingError.dataCorrupted(DecodingError.Context(codingPath: [], debugDescription: "Failed to decode JSON"))))
}
}.resume()
} catch {
return .failure(error)
}
}

135
RIT Dining/Views/DetailView.swift
View File

@ -9,17 +9,15 @@ import SwiftUI
import SafariServices
struct DetailView: View {
@State var location: DiningLocation
@Binding var location: DiningLocation
@Environment(Favorites.self) var favorites
@State private var isLoading: Bool = true
@State private var rotationDegrees: Double = 0
@State private var showingSafari: Bool = false
@State private var openString: String = ""
@State private var week: [Date] = []
@State private var weeklyHours: [[String]] = []
@State private var occupancyLoading: Bool = true
@State private var occupancyPercentage: Double = 0.0
@State private var focusedDate: Date = Date()
private let daysOfWeek = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"]
private var animation: Animation {
@ -28,76 +26,63 @@ struct DetailView: View {
.repeatForever(autoreverses: false)
}
private func requestDone(result: Result<DiningLocationParser, Error>) -> Void {
switch result {
case .success(let location):
let diningInfo = parseLocationInfo(location: location, forDate: focusedDate)
if let times = diningInfo.diningTimes, !times.isEmpty {
var timeStrings: [String] = []
for time in times {
timeStrings.append("\(dateDisplay.string(from: time.openTime)) - \(dateDisplay.string(from: time.closeTime))")
}
weeklyHours.append(timeStrings)
} else {
weeklyHours.append(["Closed"])
}
case .failure(let error):
print(error)
}
if week.count > 0 {
// Saving this to a state variable SUCKS, but I needed a quick fix and all of this request code is still pending a
// rewrite anyway to be properly async like the code in ContentView and VisitingChefs.
focusedDate = week.removeFirst()
DispatchQueue.global().async {
let dateString = focusedDate.formatted(.iso8601
.year().month().day()
.dateSeparator(.dash))
getSingleDiningInfo(date: dateString, locationId: location.id, completionHandler: requestDone)
}
} else {
isLoading = false
print(weeklyHours)
}
}
private func getWeeklyHours() {
// This function is now actaully async and iterative! Wow! It doesn't suck ass anymore!
private func getWeeklyHours() async {
let calendar = Calendar.current
let today = calendar.startOfDay(for: Date())
let dayOfWeek = calendar.component(.weekday, from: today)
week = calendar.range(of: .weekday, in: .weekOfYear, for: today)!
let week = calendar.range(of: .weekday, in: .weekOfYear, for: today)!
.compactMap { calendar.date(byAdding: .day, value: $0 - dayOfWeek, to: today) }
DispatchQueue.global().async {
let date_string = week.removeFirst().formatted(.iso8601
var newWeeklyHours: [[String]] = []
for day in week {
let date_string = day.formatted(.iso8601
.year().month().day()
.dateSeparator(.dash))
getSingleDiningInfo(date: date_string, locationId: location.id, completionHandler: requestDone)
switch await getSingleDiningInfo(date: date_string, locId: location.id) {
case .success(let location):
let diningInfo = parseLocationInfo(location: location, forDate: day)
if let times = diningInfo.diningTimes, !times.isEmpty {
var timeStrings: [String] = []
for time in times {
timeStrings.append("\(dateDisplay.string(from: time.openTime)) - \(dateDisplay.string(from: time.closeTime))")
}
newWeeklyHours.append(timeStrings)
} else {
newWeeklyHours.append(["Closed"])
}
case .failure(let error):
print(error)
}
}
weeklyHours = newWeeklyHours
isLoading = false
print(weeklyHours)
}
private func getOccupancy() {
private func getOccupancy() async {
// Only fetch occupancy data if the location is actually open right now. Otherwise, just exit early and hide the spinner.
if location.open == .open || location.open == .closingSoon {
DispatchQueue.main.async {
getOccupancyPercentage(mdoId: location.mdoId) { result in
switch result {
case .success(let occupancy):
DispatchQueue.main.sync {
occupancyPercentage = occupancy
occupancyLoading = false
}
case .failure(let error):
print(error)
DispatchQueue.main.sync {
occupancyLoading = false
}
}
}
occupancyLoading = true
switch await getOccupancyPercentage(mdoId: location.mdoId) {
case .success(let occupancy):
occupancyPercentage = occupancy
occupancyLoading = false
case .failure(let error):
print(error)
occupancyLoading = false
}
} else {
occupancyLoading = false
}
}
// Same label update timer from ContentView.
private func updateOpenStatuses() async {
Timer.scheduledTimer(withTimeInterval: 3, repeats: true) { _ in
location.updateOpenStatus()
}
}
var body: some View {
if isLoading {
VStack {
@ -114,8 +99,8 @@ struct DetailView: View {
Text("Loading...")
.foregroundStyle(.secondary)
}
.onAppear {
getWeeklyHours()
.task {
await getWeeklyHours()
}
.padding()
} else {
@ -200,8 +185,8 @@ struct DetailView: View {
.progressViewStyle(.circular)
.frame(width: 18, height: 18)
.opacity(occupancyLoading ? 1 : 0)
.onAppear {
getOccupancy()
.task {
await getOccupancy()
}
}
.foregroundStyle(Color.accent.opacity(occupancyLoading ? 0.5 : 1.0))
@ -294,20 +279,24 @@ struct DetailView: View {
.sheet(isPresented: $showingSafari) {
SafariView(url: URL(string: location.mapsUrl)!)
}
.refreshable {
await getWeeklyHours()
await getOccupancy()
}
}
}
}
#Preview {
DetailView(location: DiningLocation(
id: 0,
mdoId: 0,
name: "Example",
summary: "A Place",
desc: "A long description of the place",
mapsUrl: "https://example.com",
diningTimes: [DiningTimes(openTime: Date(), closeTime: Date())],
open: .open,
visitingChefs: nil,
dailySpecials: nil))
}
//#Preview {
// DetailView(location: DiningLocation(
// id: 0,
// mdoId: 0,
// name: "Example",
// summary: "A Place",
// desc: "A long description of the place",
// mapsUrl: "https://example.com",
// diningTimes: [DiningTimes(openTime: Date(), closeTime: Date())],
// open: .open,
// visitingChefs: nil,
// dailySpecials: nil))
//}

25
RIT Dining/Views/VisitingChefs.swift
View File

@ -30,21 +30,20 @@ struct VisitingChefs: View {
// information.
private func getDiningDataForDate(date: String) async {
var newDiningLocations: [DiningLocation] = []
getAllDiningInfo(date: date) { result in
switch result {
case .success(let locations):
for i in 0..<locations.locations.count {
let diningInfo = parseLocationInfo(location: locations.locations[i], forDate: nil)
print(diningInfo.name)
// Only save the locations that actually have visiting chefs to avoid extra iterations later.
if let visitingChefs = diningInfo.visitingChefs, !visitingChefs.isEmpty {
newDiningLocations.append(diningInfo)
}
switch await getAllDiningInfo(date: date) {
case .success(let locations):
for i in 0..<locations.locations.count {
let diningInfo = parseLocationInfo(location: locations.locations[i], forDate: nil)
print(diningInfo.name)
// Only save the locations that actually have visiting chefs to avoid extra iterations later.
if let visitingChefs = diningInfo.visitingChefs, !visitingChefs.isEmpty {
newDiningLocations.append(diningInfo)
}
locationsWithChefs = newDiningLocations
isLoading = false
case .failure(let error): print(error)
}
locationsWithChefs = newDiningLocations
isLoading = false
case .failure(let error):
print(error)
}
}