For #1242: Adds telemetry for error pages

app/metrics.yaml

@@ -263,7 +263,6 @@ quick_action_sheet:
     data_reviews:
     - https://github.com/mozilla-mobile/fenix/pull/1362#issuecomment-479668466
     notification_emails:
-
     - fenix-core@mozilla.com
     expires: "2020-03-01"
   share_tapped:
@@ -717,4 +716,20 @@ library:
     - https://github.com/mozilla-mobile/fenix/pull/2538#issuecomment-492830242
     notification_emails:
     - fenix-core@mozilla.com
+    expires: "2020-03-01"
+
+error_page:
+  visited_error:
+    type: event
+    description: >
+      A user encountered an error page
+    extra_keys:
+      error_type:
+        description: "The error type of the error page encountered"
+    bugs:
+    - 1242
+    data_reviews:
+    - https://github.com/mozilla-mobile/fenix/pull/2491#issuecomment-492414486
+    notification_emails:
+    - fenix-core@mozilla.com
     expires: "2020-03-01"

app/src/main/java/org/mozilla/fenix/AppRequestInterceptor.kt

@@ -9,6 +9,7 @@ import mozilla.components.browser.errorpages.ErrorPages
 import mozilla.components.browser.errorpages.ErrorType
 import mozilla.components.concept.engine.EngineSession
 import mozilla.components.concept.engine.request.RequestInterceptor
+import org.mozilla.fenix.components.metrics.Event
 import org.mozilla.fenix.exceptions.ExceptionDomains
 import org.mozilla.fenix.ext.components
 import org.mozilla.fenix.utils.Settings
@@ -45,11 +46,11 @@ class AppRequestInterceptor(private val context: Context) : RequestInterceptor {
         errorType: ErrorType,
         uri: String?
     ): RequestInterceptor.ErrorResponse? {
-
         val riskLevel = getRiskLevel(errorType)
         val htmlResource = getPageForRiskLevel(riskLevel)
         val cssResource = getStyleForRiskLevel(riskLevel)
 
+        context.components.analytics.metrics.track(Event.ErrorPageVisited(errorType))
         return RequestInterceptor.ErrorResponse(
             ErrorPages
                 .createErrorPage(context, errorType, uri = uri, htmlResource = htmlResource, cssResource = cssResource)

app/src/main/java/org/mozilla/fenix/components/metrics/GleanMetricsService.kt

@@ -25,6 +25,7 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.runBlocking
 import org.mozilla.fenix.GleanMetrics.QrScanner
 import org.mozilla.fenix.GleanMetrics.Library
+import org.mozilla.fenix.GleanMetrics.ErrorPage
 
 private class EventWrapper<T : Enum<T>>(
     private val recorder: ((Map<T, String>?) -> Unit),
@@ -183,6 +184,10 @@ private val Event.wrapper
             { Library.selectedItem },
             { Library.selectedItemKeys.valueOf(it) }
         )
+        is Event.ErrorPageVisited -> EventWrapper(
+            { ErrorPage.visitedError },
+            { ErrorPage.visitedErrorKeys.valueOf(it) }
+        )
 
         // Don't track other events with Glean
         else -> null

app/src/main/java/org/mozilla/fenix/components/metrics/Metrics.kt

@@ -4,6 +4,7 @@
 package org.mozilla.fenix.components.metrics
 
 import android.content.Context
+import mozilla.components.browser.errorpages.ErrorType
 import mozilla.components.browser.search.SearchEngine
 import mozilla.components.support.base.Component
 import mozilla.components.support.base.facts.Fact
@@ -110,6 +111,11 @@ sealed class Event {
             get() = mapOf("source" to item)
     }
 
+    data class ErrorPageVisited(val errorType: ErrorType) : Event() {
+        override val extras: Map<String, String>?
+            get() = mapOf("errorType" to errorType.name)
+    }
+
     data class SearchBarTapped(val source: Source) : Event() {
         enum class Source { HOME, BROWSER }
         override val extras: Map<String, String>?