Added a button to direct the user to download their schedule from Stud.IP if they have not done any modifications to their schedule; fixed a bug that would show opening hours of the currently selected canteen or crash the app whenever the info button in FetcherActivity.kt was clicked

app/src/main/java/com/denizk0461/weserplaner/activity/FetcherActivity.kt

@@ -12,6 +12,7 @@ import com.denizk0461.weserplaner.R
 import com.denizk0461.weserplaner.data.showErrorSnackBar
 import com.denizk0461.weserplaner.data.showToast
 import com.denizk0461.weserplaner.databinding.ActivityFetcherBinding
+import com.denizk0461.weserplaner.model.TextSheetContentId
 import com.denizk0461.weserplaner.sheet.TextSheet
 import com.denizk0461.weserplaner.viewmodel.FetcherViewModel
 import java.io.IOException
@@ -98,6 +99,7 @@ class FetcherActivity : FragmentActivity() {
                         bundle.putString("header", getString(R.string.fetch_bar_help_sheet_title))
                         bundle.putString("content", getString(R.string.fetch_bar_help_sheet_content))
                         bundle.putBoolean("isCancellable", true)
+                        bundle.putInt("contentId", TextSheetContentId.PASS_RAW_STRING)
                         sheet.arguments = bundle
                     }.show(supportFragmentManager, TextSheet::class.java.simpleName)
                     true
@@ -112,8 +114,6 @@ class FetcherActivity : FragmentActivity() {
          */
         binding.webview.loadUrl("https://elearning.uni-bremen.de/index.php?again=yes")
 
-        binding.webview
-
         binding.fab.setOnClickListener {
 
             if (binding.webview.url?.contains(

app/src/main/java/com/denizk0461/weserplaner/data/StudIPParser.kt

@@ -2,6 +2,7 @@ package com.denizk0461.weserplaner.data
 
 import android.app.Application
 import com.denizk0461.weserplaner.db.AppRepository
+import com.denizk0461.weserplaner.model.SettingsPreferences
 import com.denizk0461.weserplaner.model.StudIPEvent
 import org.jsoup.Jsoup
 import org.jsoup.nodes.Document
@@ -109,6 +110,9 @@ class StudIPParser(application: Application) {
         // After fetching has finished, save the list of new items into persistent storage
         repo.insertEvents(newEvents)
 
+        // Set that the user has modified their schedule
+        repo.setPreference(SettingsPreferences.HAS_MODIFIED_SCHEDULE, true)
+
         // Return the count of elements that were not able to be fetched
         return elementsNotFetched
     }

app/src/main/java/com/denizk0461/weserplaner/fragment/EventFragment.kt

@@ -1,11 +1,14 @@
 package com.denizk0461.weserplaner.fragment
 
+import android.content.Intent
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.fragment.app.setFragmentResultListener
 import androidx.fragment.app.viewModels
 import com.denizk0461.weserplaner.R
+import com.denizk0461.weserplaner.activity.FetcherActivity
 import com.denizk0461.weserplaner.adapter.StudIPEventPageAdapter
 import com.denizk0461.weserplaner.databinding.FragmentEventBinding
 import com.denizk0461.weserplaner.sheet.ScheduleUpdateSheet
@@ -79,6 +82,19 @@ class EventFragment : AppFragment() {
             )
         }
 
+        // Launch the Stud.IP fetcher on click of the fetch button
+        binding.buttonFetchSchedule.setOnClickListener {
+            startActivity(Intent(context, FetcherActivity::class.java))
+        }
+
+        /*
+         * Set the fetch button to be visible if the user has not previously modified their schedule
+         * in any way (added an event manually or used the Stud.IP fetcher).
+         */
+        if (!viewModel.preferenceHasModifiedSchedule) {
+            binding.buttonFetchSchedule.visibility = View.VISIBLE
+        }
+
         // Set up button for adding a new event
         binding.fabAddEvent.setOnClickListener {
             /*
@@ -90,6 +106,16 @@ class EventFragment : AppFragment() {
                     val bundle = Bundle()
                     bundle.putBoolean("isEditing", false)
                     sheet.arguments = bundle
+
+                    /*
+                     * Receive fragment result to update the button visibility.
+                     * TODO doesn't work after configuration change (change into or out of multi
+                     *  window)
+                     */
+                    setFragmentResultListener("eventAdded") { _, _ ->
+                        // Hide the fetch button
+                        binding.buttonFetchSchedule.visibility = View.GONE
+                    }
                 }
             )
         }

app/src/main/java/com/denizk0461/weserplaner/model/SettingsPreferences.kt

@@ -63,5 +63,10 @@ enum class SettingsPreferences(val key: String) {
      * Whether the user has opened the canteen fragment before.
      */
     HAS_OPENED_CANTEEN("has_opened_canteen"),
+
+    /**
+     * Whether the user has done something to modify their schedule.
+     */
+    HAS_MODIFIED_SCHEDULE("has_modified_schedule"),
     ;
 }

app/src/main/java/com/denizk0461/weserplaner/sheet/ScheduleUpdateSheet.kt

@@ -5,6 +5,7 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.appcompat.widget.PopupMenu
 import androidx.core.widget.addTextChangedListener
+import androidx.fragment.app.setFragmentResult
 import androidx.fragment.app.viewModels
 import androidx.transition.TransitionManager
 import com.denizk0461.weserplaner.R
@@ -93,7 +94,8 @@ class ScheduleUpdateSheet : AppSheet(R.layout.sheet_schedule_update) {
                         dismiss()
                     } else {
                         // Update the text to show the user that they clicked the button once
-                        TransitionManager.beginDelayedTransition(binding.buttonContainer as ViewGroup)
+                        TransitionManager
+                            .beginDelayedTransition(binding.buttonContainer as ViewGroup)
                         binding.buttonDelete.text =
                             getString(R.string.sheet_schedule_update_delete_confirm)
                         hasClickedDelete = true
@@ -186,6 +188,13 @@ class ScheduleUpdateSheet : AppSheet(R.layout.sheet_schedule_update) {
                                 colour = colour,
                             )
                         )
+
+                        /*
+                         * Send an empty bundle to tell the parent fragment that it should update its view
+                         * according to the changes made here.
+                         */
+                        parentFragment?.setFragmentResult("eventAdded", Bundle())
+
                         // Dismiss the sheet upon update
                         dismiss()
                     }

app/src/main/java/com/denizk0461/weserplaner/viewmodel/EventViewModel.kt

@@ -19,10 +19,19 @@ class EventViewModel(app: Application) : AppViewModel(app) {
             defaultValue = true,
         )
 
+    /**
+     * Determines whether the user is launching the app for the first time.
+     */
     var preferenceFirstLaunch: Boolean
         get() = repo.getBooleanPreference(
             SettingsPreferences.FIRST_LAUNCH,
             defaultValue = true,
         )
         set(value) { repo.setPreference(SettingsPreferences.FIRST_LAUNCH, value) }
+
+    /**
+     * Determines whether the user has done something to modify their schedule.
+     */
+    val preferenceHasModifiedSchedule: Boolean
+        get() = repo.getBooleanPreference(SettingsPreferences.HAS_MODIFIED_SCHEDULE)
 }

app/src/main/java/com/denizk0461/weserplaner/viewmodel/ScheduleUpdateViewModel.kt

@@ -1,6 +1,7 @@
 package com.denizk0461.weserplaner.viewmodel
 
 import android.app.Application
+import com.denizk0461.weserplaner.model.SettingsPreferences
 import com.denizk0461.weserplaner.model.StudIPEvent
 
 class ScheduleUpdateViewModel(application: Application) : AppViewModel(application) {
@@ -10,7 +11,13 @@ class ScheduleUpdateViewModel(application: Application) : AppViewModel(applicati
      *
      * @param event the event to save
      */
-    fun insert(event: StudIPEvent) { doAsync { repo.insert(event) } }
+    fun insert(event: StudIPEvent) {
+        // Inser the event
+        doAsync { repo.insert(event) }
+
+        // Set that the user has modified their schedule
+        repo.setPreference(SettingsPreferences.HAS_MODIFIED_SCHEDULE, true)
+    }
 
     /**
      * Updates a schedule element.

app/src/main/res/drawable/cloud_download.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#000000"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M19.35,10.04C18.67,6.59 15.64,4 12,4 9.11,4 6.6,5.64 5.35,8.04 2.34,8.36 0,10.91 0,14c0,3.31 2.69,6 6,6h13c2.76,0 5,-2.24 5,-5 0,-2.64 -2.05,-4.78 -4.65,-4.96zM17,13l-5,5 -5,-5h3V9h4v4h3z"/>
+</vector>

app/src/main/res/layout/fragment_event.xml

@@ -39,6 +39,16 @@
         android:layout_height="match_parent"
         app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
 
+    <com.google.android.material.button.MaterialButton
+        style="@style/Widget.Material3.Button.ElevatedButton"
+        android:id="@+id/button_fetch_schedule"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        app:icon="@drawable/cloud_download"
+        android:text="@string/event_empty_fetch_button"
+        android:visibility="gone"/>
+
     <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/fab_add_event"
         android:layout_width="wrap_content"

app/src/main/res/values-de/strings.xml

@@ -24,6 +24,8 @@
     <string name="fetch_error_webpage_snack">Du musst deinen Stundenplan öffnen!</string>
     <string name="canteen_fetch_error">Mensaplan konnte nicht heruntergeladen werden!</string>
 
+    <string name="event_empty_fetch_button">Lade Deinen Stundenplan von Stud.IP herunter</string>
+
     <!-- plurals string resource cannot be used here because Android doesn't treat 0 differently from 2 -->
     <string name="toast_fetch_finished_zero">Dein Stundenplan wurde aktualisiert!</string>
     <string name="toast_fetch_finished_one">Dein Stundenplan wurde aktualisiert, doch eine Veranstaltung konnte nicht heruntergeladen werden.</string>

app/src/main/res/values/strings.xml

@@ -25,6 +25,8 @@
     <string name="fetch_error_webpage_snack">You must navigate to your schedule!</string>
     <string name="canteen_fetch_error">Couldn\'t retrieve the canteen plan!</string>
 
+    <string name="event_empty_fetch_button">Download your schedule from Stud.IP</string>
+
     <!-- plurals resource cannot be used here; view German translation for details -->
     <string name="toast_fetch_finished_zero">Your schedule has been refreshed!</string>
     <string name="toast_fetch_finished_one">Your schedule has been refreshed, but one item could not be saved.</string>