Fixed TimerTask Object

app/build.gradle

@@ -24,8 +24,8 @@ android {
         applicationId "org.hackillinois.android"
         minSdkVersion 23
         targetSdkVersion 33
-        versionCode 60
-        versionName "2024.2.2"
+        versionCode 61
+        versionName "2024.3.0"
         multiDexEnabled true
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true

app/src/main/java/org/hackillinois/android/API.kt

@@ -64,7 +64,7 @@ interface API {
 
     // SHOP
 
-    @GET("shop/")
+    @GET("shop/v2/")
     suspend fun shop(): List<ShopItem>
 
     @POST("shop/item/buy/")
@@ -92,7 +92,7 @@ interface API {
     @PUT("user/unfollow/")
     fun unfollowEvent(@Body eventId: EventId): Call<FavoritesResponse>
 
-    @GET("user/qr/")
+    @GET("user/v2-qr/")
     suspend fun qrCode(): QR
 
     @PUT("user/scan-event/")

app/src/main/java/org/hackillinois/android/repository/ShopRepository.kt

@@ -24,7 +24,6 @@ class ShopRepository {
         GlobalScope.launch(Dispatchers.IO) {
             try {
                 val shop = App.getAPI().shop()
-                Log.d("SHOP REFRESH ALL", shop.toString())
                 shopDao.clearTableAndInsertShopItems(shop)
             } catch (e: Exception) {
                 Log.e("SHOP REFRESH ALL", e.toString())

app/src/main/java/org/hackillinois/android/view/profile/ProfileFragment.kt

@@ -40,6 +40,20 @@ class ProfileFragment : Fragment() {
     private var pro = false
     private var userRoles: Roles? = null
 
+    override fun onPause() {
+        super.onPause()
+        if (isAttendee()) {
+            profileViewModel.stopTimer()
+        }
+    }
+
+    override fun onResume() {
+        super.onResume()
+        if (isAttendee()) {
+            profileViewModel.startTimer()
+        }
+    }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
@@ -65,13 +79,13 @@ class ProfileFragment : Fragment() {
         // set up LiveData observers
         profileViewModel.currentProfileLiveData.observe(
             this@ProfileFragment,
-            Observer { updateProfileUI(it) },
+            Observer { updateProfileUI(it) }
         )
         profileViewModel.qr.observe(
             this@ProfileFragment,
             Observer {
                 updateQrView(it)
-            },
+            }
         )
         profileViewModel.roles.observe(
             this@ProfileFragment,
@@ -81,13 +95,13 @@ class ProfileFragment : Fragment() {
                     pro = it.isPro()
                     updateProTag()
                 }
-            },
+            }
         )
         profileViewModel.ranking.observe(
             this@ProfileFragment,
             Observer {
                 updateRanking(it)
-            },
+            }
         )
 
         // do view creation here if attendee
@@ -175,4 +189,10 @@ class ProfileFragment : Fragment() {
         val prefString = context.getString(R.string.authorization_pref_file_key)
         return context.getSharedPreferences(prefString, Context.MODE_PRIVATE).getString("provider", "") ?: "" == "google"
     }
+
+    private fun isAttendee(): Boolean {
+        val context = requireActivity().applicationContext
+        val prefString = context.getString(R.string.authorization_pref_file_key)
+        return context.getSharedPreferences(prefString, Context.MODE_PRIVATE).getString("provider", "") ?: "" == "github"
+    }
 }

app/src/main/java/org/hackillinois/android/view/shop/ShopFragment.kt

@@ -42,6 +42,16 @@ class ShopFragment : Fragment() {
     // Merch tab is default selected
     private var showingMerch: Boolean = true
 
+    override fun onPause() {
+        super.onPause()
+        shopViewModel.stopTimer()
+    }
+
+    override fun onResume() {
+        super.onResume()
+        shopViewModel.startTimer()
+    }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 

app/src/main/java/org/hackillinois/android/viewmodel/ProfileViewModel.kt

@@ -24,6 +24,7 @@ class ProfileViewModel : ViewModel() {
     var ranking: MutableLiveData<Ranking> = MutableLiveData()
     lateinit var roles: LiveData<Roles>
     lateinit var timerObj: Timer
+    private var isTimerRunning = false
 
     fun init() {
         this.roles = rolesRepository.fetch()
@@ -32,21 +33,36 @@ class ProfileViewModel : ViewModel() {
         currentProfileLiveData = profileRepository.fetchProfile()
         // Initial qr code fetching
         qr = qrRepository.fetch()
+        startTimer()
+    }
 
+    fun startTimer() {
         // should refresh QR code every 15 seconds using Timer() class
-        timerObj = Timer()
-        val timerTaskObj: TimerTask = object : TimerTask() {
-            override fun run() {
-                qr = qrRepository.fetch()
+        if (!isTimerRunning) {
+            timerObj = Timer()
+            val timerTaskObj: TimerTask = object : TimerTask() {
+                override fun run() {
+                    Log.d("QR FETCH", "...")
+                    qr = qrRepository.fetch()
+                }
             }
+            // Runs TimerTask every 15 seconds, with a 0 second delay upon the call of init().
+            timerObj.scheduleAtFixedRate(timerTaskObj, 0, 15000)
+            isTimerRunning = true
+        }
+    }
+
+    fun stopTimer() {
+        if (isTimerRunning && ::timerObj.isInitialized) {
+            timerObj.cancel()
+            isTimerRunning = false
         }
-        // Runs TimerTask every 15 seconds, with a 0 second delay upon the call of init().
-        timerObj.scheduleAtFixedRate(timerTaskObj, 0, 15000)
     }
 
     override fun onCleared() {
         super.onCleared()
-        timerObj.cancel()
+        Log.d("OnCleared", "QR")
+        stopTimer()
     }
 
     private fun fetchRanking() {

app/src/main/java/org/hackillinois/android/viewmodel/ShopViewModel.kt

@@ -17,29 +17,46 @@ class ShopViewModel : ViewModel() {
     lateinit var profileLiveData: LiveData<Profile>
 
     lateinit var timerObj: Timer
+    private var isTimerRunning = false
+    private var isAttendee = true
 
-    fun init(isAttendee: Boolean) {
+    fun init(inIsAttendee: Boolean) {
         // initial fetch
         shopLiveData = shopRepository.fetchShop()
+        isAttendee = inIsAttendee
         if (isAttendee) {
             profileLiveData = profileRepository.fetchProfile()
         }
 
+        startTimer()
+    }
+
+    fun startTimer() {
         // runs TimerTask every 10 seconds to fetch profile and shop data
-        timerObj = Timer()
-        val timerTaskObj: TimerTask = object : TimerTask() {
-            override fun run() {
-                shopLiveData = shopRepository.fetchShop()
-                if (isAttendee) {
-                    profileLiveData = profileRepository.fetchProfile()
+        if (!isTimerRunning) {
+            timerObj = Timer()
+            val timerTaskObj: TimerTask = object : TimerTask() {
+                override fun run() {
+                    shopLiveData = shopRepository.fetchShop()
+                    if (isAttendee) {
+                        profileLiveData = profileRepository.fetchProfile()
+                    }
                 }
             }
+            timerObj.scheduleAtFixedRate(timerTaskObj, 0, 10000)
+            isTimerRunning = true
+        }
+    }
+
+    fun stopTimer() {
+        if (isTimerRunning && ::timerObj.isInitialized) {
+            timerObj.cancel()
+            isTimerRunning = false
         }
-        timerObj.scheduleAtFixedRate(timerTaskObj, 0, 10000)
     }
 
     override fun onCleared() {
         super.onCleared()
-        timerObj.cancel()
+        stopTimer()
     }
 }