Feature/widget views (#472)

* Add empty widget view

* Add tuition widget

* Add Cafeteria Widget

* Cycle through menu items in cafeteria widget

* Add allergenics label to cafeteria widget

* Add study room widget

* Add widget sizes, improve widget visibility

* Improve design of tuition fee widget

* Implement different size options for CafeteriaWidgetView, remove animations

* Make tuition widget compatible with all sizes, improve its design

* Make study room widget compatible with all sizes, improve its design

* Beautify study room widget

* Beautify tuition widget

* Change study room widget color to white / dark gray

* Change tuition fee widget color to white / dark gray

* Add text widget view

* Use text widget view in study room widget

* Use widget color in widget loading view

* Update project file

* Beautify cafeteria widget

* Remove Color extension

* Fix count of available study rooms in large study room widget

* Add grades widget

* Add profile toolbar to widget screen

* Add calendar widget

* Fix preview

* Add map background to study room widget

* Improve study room widget design

* Improve tuition widget design

* Refactor TuitionWidgetInfoView

* Improve cafeteria widget design

* Improve grade widget design

* Make calendar widget title size consistent with other widgets

* Change symbol for widget screen

* Improve widget frame previews

* Add time based widget recommendations

* Use protocols for widget recommender strategies

* Add location strategy for widget recommendations

* Add spatio-temporal strategy for widget recommendations

* Add support for app usage data storage

* Collect usage data for calendar, grades, cafeteria, study room, and tuition view

Analytics.xcdatamodeld/Analytics.xcdatamodel/contents

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="20086" systemVersion="21F79" minimumToolsVersion="Automatic" sourceLanguage="Swift" userDefinedModelVersionIdentifier="">
+    <entity name="AppUsageData" representedClassName="AppUsageData" syncable="YES" codeGenerationType="class">
+        <attribute name="location" optional="YES" attributeType="String"/>
+        <attribute name="time" optional="YES" attributeType="Date" usesScalarValueType="NO"/>
+        <attribute name="view" optional="YES" attributeType="String"/>
+    </entity>
+    <elements>
+        <element name="AppUsageData" positionX="-54" positionY="-9" width="128" height="74"/>
+    </elements>
+</model>

Campus-iOS/AnalyticsComüo/AnalyticsController.swift

@@ -0,0 +1,28 @@
+//
+//  Analytics.swift
+//  Campus-iOS
+//
+//  Created by Robyn Kölle on 16.08.22.
+//
+
+import Foundation
+import MapKit
+
+struct AnalyticsController {
+
+    static func visitedView(view: CampusAppView) {
+        let time = Date()
+
+        guard let location = CLLocationManager().location else {
+            return
+        }
+
+        let data = AppUsageData(context: PersistenceController.shared.container.viewContext)
+        data.latitude = location.coordinate.latitude
+        data.longitude = location.coordinate.longitude
+        data.time = time
+        data.view = view.rawValue
+
+        PersistenceController.shared.save()
+    }
+}

Campus-iOS/App.swift

@@ -97,6 +97,21 @@ struct CampusApp: App {
                 Label("Places", systemImage: "mappin.and.ellipse")
             }
             .navigationViewStyle(.stack)
+
+            NavigationView {
+                WidgetScreen(model: model)
+                    .navigationTitle("My Widgets")
+                    .toolbar {
+                        ToolbarItemGroup(placement: .navigationBarTrailing) {
+                            ProfileToolbar(model: model)
+                        }
+                    }
+            }
+            .tag(4)
+            .tabItem {
+                Label("My Widgets", systemImage: "rectangle.3.group")
+            }
+            .navigationViewStyle(.stack)
         }
     }
 }

Campus-iOS/Assets.xcassets/darkGray.colorset/Contents.json

@@ -0,0 +1,20 @@
+{
+  "colors" : [
+    {
+      "color" : {
+        "color-space" : "display-p3",
+        "components" : {
+          "alpha" : "1.000",
+          "blue" : "0.288",
+          "green" : "0.280",
+          "red" : "0.281"
+        }
+      },
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Campus-iOS/Assets.xcassets/widgetColor.colorset/Contents.json

@@ -0,0 +1,38 @@
+{
+  "colors" : [
+    {
+      "color" : {
+        "color-space" : "srgb",
+        "components" : {
+          "alpha" : "1.000",
+          "blue" : "1.000",
+          "green" : "1.000",
+          "red" : "1.000"
+        }
+      },
+      "idiom" : "universal"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "color" : {
+        "color-space" : "srgb",
+        "components" : {
+          "alpha" : "1.000",
+          "blue" : "0.200",
+          "green" : "0.200",
+          "red" : "0.200"
+        }
+      },
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Campus-iOS/Base/Enums/Enums.swift

@@ -64,3 +64,12 @@ enum Role: String {
         }
     }
 }
+
+/* Views for which we gather usage data for the widget recommendations. */
+enum CampusAppView: String, CaseIterable {
+    case cafeteria = "cafeteria",
+         calendar = "calendar",
+         grades = "grades",
+         studyRoom = "studyRoom",
+         tuition = "tuition"
+}

Campus-iOS/CalendarComponent/Entity/CalendarEvent.swift

@@ -27,19 +27,19 @@ struct CalendarEvent: Identifiable, Equatable, Entity {
     var status: String?
     var title: String?
     var url: URL?
-
+    
     /*
-         <event>
-            <nr>886515989</nr>
-            <status>FT</status>
-            <url>https://campus.tum.de/tumonline/lv.detail?cLvNr=950369994</url>
-            <title>Programmoptimierung (IN2053) VI</title>
-            <description>fix; Abhaltung; </description>
-            <dtstart>2019-01-16 10:00:00</dtstart>
-            <dtend>2019-01-16 12:00:00</dtend>
-            <location>00.13.009A, Seminarraum (5613.EG.009A)</location>
-         </event>
-    */
+     <event>
+     <nr>886515989</nr>
+     <status>FT</status>
+     <url>https://campus.tum.de/tumonline/lv.detail?cLvNr=950369994</url>
+     <title>Programmoptimierung (IN2053) VI</title>
+     <description>fix; Abhaltung; </description>
+     <dtstart>2019-01-16 10:00:00</dtstart>
+     <dtend>2019-01-16 12:00:00</dtend>
+     <location>00.13.009A, Seminarraum (5613.EG.009A)</location>
+     </event>
+     */
 
     enum CodingKeys: String, CodingKey {
         case descriptionText = "description"
@@ -54,7 +54,7 @@ struct CalendarEvent: Identifiable, Equatable, Entity {
 
     var kvkEvent: Event {
         var event = Event(ID: self.id.description)
-
+        
         event.start = self.startDate ?? Date()
         event.end = self.endDate ?? Date()
 
@@ -115,15 +115,15 @@ struct CalendarEvent: Identifiable, Equatable, Entity {
         endDate: Date? = nil,
         location: String? = nil) {
 
-        self.id = id
-        self.status = status
-        self.url = url
-        self.title = title
-        self.descriptionText = descriptionText
-        self.startDate = startDate
-        self.endDate = endDate
-        self.location = location
-    }
+            self.id = id
+            self.status = status
+            self.url = url
+            self.title = title
+            self.descriptionText = descriptionText
+            self.startDate = startDate
+            self.endDate = endDate
+            self.location = location
+        }
 
     init(from decoder: Decoder) throws {
         let container = try decoder.container(keyedBy: CodingKeys.self)
@@ -146,7 +146,7 @@ struct CalendarEvent: Identifiable, Equatable, Entity {
         self.endDate = endDate
         self.location = location
     }
-
+    
     private static let dateFormatter: DateFormatter = {
         let formatter = DateFormatter()
         formatter.locale = Locale.current
@@ -165,3 +165,17 @@ class CustomEventDesign: EventViewGeneral {
         fatalError("init(coder:) has not been implemented")
     }
 }
+
+extension CalendarEvent {
+
+    static let mockEvent = CalendarEvent(
+        id: 1,
+        status: "FT",
+        url: URL(string: "https://campus.tum.de/tumonline/lv.detail?cLvNr=950369994"),
+        title: "Programmoptimierung (IN2053) VI",
+        descriptionText: "fix; Abhaltung; ",
+        startDate: Date(),
+        endDate: Date().addingTimeInterval(60 * 60),
+        location: "00.13.009A, Seminarraum (5613.EG.009A)"
+    )
+}

Campus-iOS/CalendarComponent/ViewModel/CalendarViewModel.swift

@@ -38,5 +38,9 @@ class CalendarViewModel: ObservableObject {
             }
         })
     }
+
+    var eventsByDate: [Date? : [CalendarEvent]] {
+        let dictionary = Dictionary(grouping: events, by: { $0.startDate })
+        return dictionary
+    }
 }
-

Campus-iOS/CalendarComponent/Views/CalendarContentView.swift

@@ -96,6 +96,9 @@ struct CalendarContentView: View {
                 ProfileToolbar(model: viewModel.model)
             }
         }
+        .task {
+            AnalyticsController.visitedView(view: .calendar)
+        }
     }
 
     static func getSafeAreaFrame(geometry: GeometryProxy) -> CGRect {