[Teacher][MBL-13254] Fix speed grader crash (#318)

Author: CalvinKern

apps/teacher/build.gradle

@@ -44,7 +44,7 @@ android {
     defaultConfig {
         minSdkVersion Versions.MIN_SDK
         targetSdkVersion Versions.TARGET_SDK
-        versionCode = 23
+        versionCode = 24
         versionName = '1.9.0'
         vectorDrawables.useSupportLibrary = true
         multiDexEnabled true

apps/teacher/src/main/java/com/instructure/teacher/fragments/SpeedGraderGradeFragment.kt

@@ -79,21 +79,10 @@ class SpeedGraderGradeFragment : BasePresenterFragment<SpeedGraderGradePresenter
     @Suppress("unused")
     @Subscribe(threadMode = ThreadMode.MAIN, sticky = true)
     fun onAssignmentGraded(event: AssignmentGradedEvent) {
-        event.once(javaClass.simpleName + presenter.submission?.id) {
+        val submissionId = presenter?.submission?.id ?: return
+        event.once(javaClass.simpleName + submissionId) {
             if(mAssignment.id == it) {
-                GlobalScope.launch {
-                    // Try to update our submission for post/hide grades
-                    presenter.submission = SubmissionManager.getSingleSubmissionAsync(
-                        presenter.course.id,
-                        presenter.assignment.id,
-                        presenter.submission?.userId ?: return@launch,
-                        true
-                    ).await().dataOrNull ?: return@launch
-
-                    withContext(Dispatchers.Main) {
-                        setupViews()
-                    }
-                }
+                presenter?.refreshSubmission()
             }
         }
     }
@@ -242,6 +231,7 @@ class SpeedGraderGradeFragment : BasePresenterFragment<SpeedGraderGradePresenter
         addGradeIcon.setGone()
         gradeProgressSpinner.announceForAccessibility(getString(R.string.loading))
         gradeProgressSpinner.setVisible()
+        hiddenIcon.setGone()
     }
 
     val  hasUnsavedChanges: Boolean get() = rubricEditView?.hasUnsavedChanges ?: false

apps/teacher/src/main/java/com/instructure/teacher/presenters/SpeedGraderGradePresenter.kt

@@ -25,11 +25,12 @@ import com.instructure.teacher.events.SubmissionUpdatedEvent
 import com.instructure.teacher.events.post
 import com.instructure.teacher.viewinterface.SpeedGraderGradeView
 import instructure.androidblueprint.FragmentPresenter
-import kotlinx.coroutines.Job
+import kotlinx.coroutines.*
 
 class SpeedGraderGradePresenter(var submission: Submission?, val assignment: Assignment, val course: Course, val assignee: Assignee) : FragmentPresenter<SpeedGraderGradeView>() {
 
     private var mPostGradeAPICall: Job? = null
+    private var refreshSubmissionApiCall: Job? = null
 
     @Suppress("EXPERIMENTAL_FEATURE_WARNING")
     fun updateGrade(grade: String, isExcused: Boolean) {
@@ -58,6 +59,34 @@ class SpeedGraderGradePresenter(var submission: Submission?, val assignment: Ass
         }
     }
 
+    fun refreshSubmission() {
+        refreshSubmissionApiCall = GlobalScope.launch(Dispatchers.Main) {
+            try {
+                viewCallback?.onRefreshStarted()
+
+                // Try to update our submission for post/hide grades
+                val newSubmission = SubmissionManager.getSingleSubmissionAsync(
+                    course.id,
+                    assignment.id,
+                    submission?.userId ?: return@launch,
+                    true
+                ).await().dataOrNull ?: return@launch
+
+                submission = newSubmission
+                viewCallback?.updateGradeText()
+                viewCallback?.onRefreshFinished()
+            } catch (e: Throwable) {
+                viewCallback?.updateGradeError()
+            }
+        }
+    }
+
+    override fun onDestroyed() {
+        super.onDestroyed()
+        mPostGradeAPICall?.cancel()
+        refreshSubmissionApiCall?.cancel()
+    }
+
     override fun loadData(forceNetwork: Boolean) { }
     override fun refresh(forceNetwork: Boolean) { }