fixed grade notification bug. increase grade refresh interval

app/build.gradle

@@ -11,8 +11,8 @@ android {
         applicationId "com.nareshkumarrao.eiweblog"
         minSdkVersion 16
         targetSdkVersion 30
-        versionCode 7
-        versionName "0.10.3"
+        versionCode 8
+        versionName "0.10.4"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -39,8 +39,8 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'com.google.android.material:material:1.3.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
-    implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.3.0'
-    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.3.0'
+    implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.3.1'
+    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.3.1'
     implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
     implementation 'androidx.legacy:legacy-support-v4:1.0.0'
     testImplementation 'junit:junit:4.13.2'

app/release/output-metadata.json

@@ -10,8 +10,8 @@
     {
       "type": "SINGLE",
       "filters": [],
-      "versionCode": 7,
-      "versionName": "0.10.3",
+      "versionCode": 8,
+      "versionName": "0.10.4",
       "outputFile": "app-release.apk"
     }
   ]

app/src/main/java/com/nareshkumarrao/eiweblog/HISUtility.kt

@@ -34,12 +34,12 @@ internal object HISUtility {
     fun checkForUpdates(context: Context?, callback: (examRows: List<ExamRow>?) -> Unit) {
         val savedRows = getSavedExamRows(context) ?: run {
             callback(null)
-            return
+            return@checkForUpdates
         }
 
         val newRows: MutableList<ExamRow> = mutableListOf()
         fetchExamRows(context) { examRows ->
-            if (examRows != null) {
+            if (examRows != null && savedRows.isNotEmpty()) {
                 for (examRow in examRows) {
                     if (!savedRows.contains(examRow)) {
                         newRows.add(examRow)

app/src/main/java/com/nareshkumarrao/eiweblog/MainActivity.kt

@@ -37,10 +37,15 @@ class MainActivity : AppCompatActivity() {
         Utilities.createNotificationChannel(this)
         HISUtility.createNotificationChannel(this)
 
-        val uploadWorkRequest: WorkRequest =
-            PeriodicWorkRequestBuilder<UpdateWorker>(1, TimeUnit.HOURS)
+        val updateWeblogWorkerRequest: WorkRequest =
+                PeriodicWorkRequestBuilder<UpdateWeblogWorker>(1, TimeUnit.HOURS)
                         .build()
-        WorkManager.getInstance(this).enqueue(uploadWorkRequest)
+        val updateGradesWorkerRequest: WorkRequest =
+                PeriodicWorkRequestBuilder<UpdateGradesWorker>(3, TimeUnit.HOURS)
+                        .build()
+
+        WorkManager.getInstance(this).enqueue(updateWeblogWorkerRequest)
+        WorkManager.getInstance(this).enqueue(updateGradesWorkerRequest)
 
         Utilities.fetchRepoReleaseInformation(this, ::repoReleaseCallback)
     }

app/src/main/java/com/nareshkumarrao/eiweblog/UpdateGradesWorker.kt

@@ -0,0 +1,24 @@
+package com.nareshkumarrao.eiweblog
+
+import android.content.Context
+import androidx.work.Worker
+import androidx.work.WorkerParameters
+
+class UpdateGradesWorker(private val context: Context, workerParams: WorkerParameters) : Worker(context, workerParams) {
+    override fun doWork(): Result {
+        val sharedPref = context.getSharedPreferences(context.getString(R.string.preference_file_key), Context.MODE_PRIVATE)
+        val gradesNotificationsEnabled = sharedPref?.getBoolean(context.getString(R.string.enable_grades_notifications_key), true)
+
+        if (gradesNotificationsEnabled!!) {
+            HISUtility.checkForUpdates(context) { gradeUpdates ->
+                if (gradeUpdates != null) {
+                    for (grade in gradeUpdates) {
+                        HISUtility.sendNotification(context, grade, gradeUpdates.indexOf(grade))
+                    }
+                }
+            }
+
+        }
+        return Result.success()
+    }
+}

app/src/main/java/com/nareshkumarrao/eiweblog/UpdateWorker.kt → app/src/main/java/com/nareshkumarrao/eiweblog/UpdateWeblogWorker.kt

@@ -6,13 +6,12 @@ import androidx.work.WorkerParameters
 import java.math.BigInteger
 import java.security.MessageDigest
 
-class UpdateWorker(private val context: Context, workerParams: WorkerParameters) : Worker(context, workerParams) {
+class UpdateWeblogWorker(private val context: Context, workerParams: WorkerParameters) : Worker(context, workerParams) {
     override fun doWork(): Result {
 
         val sharedPref = context.getSharedPreferences(context.getString(R.string.preference_file_key), Context.MODE_PRIVATE)
 
         val weblogNotificationsEnabled = sharedPref?.getBoolean(context.getString(R.string.enable_weblog_notifications_key), true)
-        val gradesNotificationsEnabled = sharedPref?.getBoolean(context.getString(R.string.enable_grades_notifications_key), true)
 
         if (weblogNotificationsEnabled!!) {
             Utilities.weblogList(context) { articles ->
@@ -34,16 +33,6 @@ class UpdateWorker(private val context: Context, workerParams: WorkerParameters)
             }
         }
 
-        if(gradesNotificationsEnabled!!){
-            HISUtility.checkForUpdates(context) { gradeUpdates ->
-                if (gradeUpdates != null) {
-                    for (grade in gradeUpdates) {
-                        HISUtility.sendNotification(context, grade, gradeUpdates.indexOf(grade))
-                    }
-                }
-            }
-        }
-
         return Result.success()
     }