For #27635 - New telemetry for Save to PDF failures

app/metrics.yaml

@@ -468,6 +468,23 @@ events:
     metadata:
       tags:
         - Sharing
+  save_to_pdf_failure:
+    type: event
+    description: |
+      A user tapped the save pdf but an error ocurred
+      and the process failed.
+    bugs:
+      - https://github.com/mozilla-mobile/fenix/issues/27635
+    data_reviews:
+      - https://github.com/mozilla-mobile/fenix/pull/27661#issuecomment-1300505370
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - android-probes@mozilla.com
+    expires: 122
+    metadata:
+      tags:
+        - Sharing
 
 onboarding:
   syn_cfr_shown:

app/src/main/java/org/mozilla/fenix/share/SaveToPDFMiddleware.kt

@@ -7,17 +7,16 @@ package org.mozilla.fenix.share
 import android.content.Context
 import android.widget.Toast
 import android.widget.Toast.LENGTH_LONG
-import kotlinx.coroutines.DelicateCoroutinesApi
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.GlobalScope
-import kotlinx.coroutines.launch
 import mozilla.components.browser.state.action.BrowserAction
 import mozilla.components.browser.state.action.EngineAction
 import mozilla.components.browser.state.state.BrowserState
 import mozilla.components.lib.state.Action
 import mozilla.components.lib.state.Middleware
 import mozilla.components.lib.state.MiddlewareContext
+import mozilla.telemetry.glean.private.NoExtras
+import org.mozilla.fenix.GleanMetrics.Events
 import org.mozilla.fenix.R
+import org.mozilla.gecko.util.ThreadUtils
 
 /**
  * [BrowserAction] middleware reacting in response to Save to PDF related [Action]s.
@@ -27,7 +26,6 @@ class SaveToPDFMiddleware(
     private val context: Context,
 ) : Middleware<BrowserState, BrowserAction> {
 
-    @OptIn(DelicateCoroutinesApi::class)
     override fun invoke(
         ctx: MiddlewareContext<BrowserState, BrowserAction>,
         next: (BrowserAction) -> Unit,
@@ -36,9 +34,10 @@ class SaveToPDFMiddleware(
         if (action is EngineAction.SaveToPdfExceptionAction) {
             // See https://github.com/mozilla-mobile/fenix/issues/27649 for more details,
             // why a Toast is used here.
-            GlobalScope.launch(Dispatchers.Main) {
+            ThreadUtils.runOnUiThread {
                 Toast.makeText(context, R.string.unable_to_save_to_pdf_error, LENGTH_LONG).show()
             }
+            Events.saveToPdfFailure.record(NoExtras())
         } else {
             next(action)
         }

app/src/test/java/org/mozilla/fenix/share/SaveToPDFMiddlewareTest.kt

@@ -0,0 +1,41 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.fenix.share
+
+import mozilla.components.browser.state.action.EngineAction
+import mozilla.components.browser.state.store.BrowserStore
+import mozilla.components.service.glean.testing.GleanTestRule
+import mozilla.components.support.test.libstate.ext.waitUntilIdle
+import mozilla.components.support.test.robolectric.testContext
+import mozilla.components.support.test.rule.MainCoroutineRule
+import mozilla.components.support.test.rule.runTestOnMain
+import org.junit.Assert.assertNotNull
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mozilla.fenix.GleanMetrics.Events
+import org.mozilla.fenix.helpers.FenixRobolectricTestRunner
+
+@RunWith(FenixRobolectricTestRunner::class)
+class SaveToPDFMiddlewareTest {
+
+    @get:Rule
+    val gleanTestRule = GleanTestRule(testContext)
+
+    @get:Rule
+    val mainCoroutineTestRule = MainCoroutineRule()
+
+    @Test
+    fun `GIVEN a save to pdf request WHEN it fails THEN telemetry is sent`() = runTestOnMain {
+        val middleware = SaveToPDFMiddleware(testContext)
+        val browserStore = BrowserStore(middleware = listOf(middleware))
+
+        browserStore.dispatch(EngineAction.SaveToPdfExceptionAction("14", RuntimeException("reader save to pdf failed")))
+        browserStore.waitUntilIdle()
+        testScheduler.advanceUntilIdle()
+
+        assertNotNull(Events.saveToPdfFailure.testGetValue())
+    }
+}