Add "Learn more" on identity verification first screen.

appconfig/src/main/kotlin/io/element/android/appconfig/LearnMoreConfig.kt

@@ -8,6 +8,7 @@
 package io.element.android.appconfig
 
 object LearnMoreConfig {
+    const val ENCRYPTION_URL: String = "https://element.io/help#encryption"
     const val SECURE_BACKUP_URL: String = "https://element.io/help#encryption5"
     const val IDENTITY_CHANGE_URL: String = "https://element.io/help#encryption18"
 }

features/verifysession/impl/build.gradle.kts

@@ -23,6 +23,8 @@ android {
 setupAnvil()
 
 dependencies {
+    implementation(projects.appconfig)
+    implementation(projects.libraries.androidutils)
     implementation(projects.libraries.core)
     implementation(projects.libraries.architecture)
     implementation(projects.libraries.matrix.api)

features/verifysession/impl/src/main/kotlin/io/element/android/features/verifysession/impl/VerifySelfSessionNode.kt

@@ -18,9 +18,11 @@ import com.bumble.appyx.core.plugin.plugins
 import dagger.assisted.Assisted
 import dagger.assisted.AssistedInject
 import io.element.android.anvilannotations.ContributesNode
+import io.element.android.appconfig.LearnMoreConfig
 import io.element.android.compound.theme.ElementTheme
 import io.element.android.features.logout.api.util.onSuccessLogout
 import io.element.android.features.verifysession.api.VerifySessionEntryPoint
+import io.element.android.libraries.androidutils.browser.openUrlInChromeCustomTab
 import io.element.android.libraries.architecture.inputs
 import io.element.android.libraries.di.SessionScope
 
@@ -36,6 +38,10 @@ class VerifySelfSessionNode @AssistedInject constructor(
         showDeviceVerifiedScreen = inputs<VerifySessionEntryPoint.Params>().showDeviceVerifiedScreen,
     )
 
+    private fun onLearnMoreClick(activity: Activity, dark: Boolean) {
+        activity.openUrlInChromeCustomTab(null, dark, LearnMoreConfig.ENCRYPTION_URL)
+    }
+
     @Composable
     override fun View(modifier: Modifier) {
         val state = presenter.present()
@@ -44,6 +50,9 @@ class VerifySelfSessionNode @AssistedInject constructor(
         VerifySelfSessionView(
             state = state,
             modifier = modifier,
+            onLearnMoreClick = {
+                onLearnMoreClick(activity, isDark)
+            },
             onEnterRecoveryKey = callback::onEnterRecoveryKey,
             onResetKey = callback::onResetKey,
             onFinish = callback::onDone,

features/verifysession/impl/src/main/kotlin/io/element/android/features/verifysession/impl/VerifySelfSessionState.kt

@@ -23,6 +23,7 @@ data class VerifySelfSessionState(
     @Stable
     sealed interface VerificationStep {
         data object Loading : VerificationStep
+        // FIXME canEnterRecoveryKey value is never read.
         data class Initial(val canEnterRecoveryKey: Boolean, val isLastDevice: Boolean = false) : VerificationStep
         data object Canceled : VerificationStep
         data object AwaitingOtherDeviceResponse : VerificationStep

features/verifysession/impl/src/main/kotlin/io/element/android/features/verifysession/impl/VerifySelfSessionView.kt

@@ -9,13 +9,13 @@ package io.element.android.features.verifysession.impl
 
 import androidx.activity.compose.BackHandler
 import androidx.compose.foundation.Image
+import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.ColumnScope
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
@@ -64,6 +64,7 @@ import io.element.android.features.verifysession.impl.VerifySelfSessionState.Ver
 @Composable
 fun VerifySelfSessionView(
     state: VerifySelfSessionState,
+    onLearnMoreClick: () -> Unit,
     onEnterRecoveryKey: () -> Unit,
     onResetKey: () -> Unit,
     onFinish: () -> Unit,
@@ -140,7 +141,10 @@ fun VerifySelfSessionView(
                 )
             }
         ) {
-            Content(flowState = verificationFlowStep)
+            Content(
+                flowState = verificationFlowStep,
+                onLearnMoreClick = onLearnMoreClick,
+            )
         }
     }
 
@@ -203,38 +207,68 @@ private fun HeaderContent(verificationFlowStep: FlowStep) {
 }
 
 @Composable
-private fun Content(flowState: FlowStep) {
-    Column(Modifier.fillMaxHeight(), verticalArrangement = Arrangement.Center) {
-        if (flowState is FlowStep.Verifying) {
+private fun Content(
+    flowState: FlowStep,
+    onLearnMoreClick: () -> Unit,
+) {
+    when (flowState) {
+        is VerifySelfSessionState.VerificationStep.Initial -> {
+            ContentInitial(onLearnMoreClick)
+        }
+        is FlowStep.Verifying -> {
             ContentVerifying(flowState)
         }
+        else -> Unit
+    }
+}
+
+@Composable
+fun ContentInitial(
+    onLearnMoreClick: () -> Unit,
+) {
+    Row(
+        modifier = Modifier.fillMaxWidth(),
+        horizontalArrangement = Arrangement.Center,
+    ) {
+        Text(
+            modifier = Modifier
+                .clickable { onLearnMoreClick() }
+                .padding(vertical = 4.dp, horizontal = 16.dp),
+            text = stringResource(CommonStrings.action_learn_more),
+            style = ElementTheme.typography.fontBodyLgMedium
+        )
     }
 }
 
 @Composable
 private fun ContentVerifying(verificationFlowStep: FlowStep.Verifying) {
-    when (verificationFlowStep.data) {
-        is SessionVerificationData.Decimals -> {
-            val text = verificationFlowStep.data.decimals.joinToString(separator = " - ") { it.toString() }
-            Text(
-                modifier = Modifier.fillMaxWidth(),
-                text = text,
-                style = ElementTheme.typography.fontHeadingLgBold,
-                color = MaterialTheme.colorScheme.primary,
-                textAlign = TextAlign.Center,
-            )
-        }
-        is SessionVerificationData.Emojis -> {
-            // We want each row to have up to 4 emojis
-            val rows = verificationFlowStep.data.emojis.chunked(4)
-            Column(
-                modifier = Modifier.fillMaxWidth(),
-                verticalArrangement = Arrangement.spacedBy(40.dp),
-            ) {
-                rows.forEach { emojis ->
-                    Row(modifier = Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.SpaceEvenly) {
-                        for (emoji in emojis) {
-                            EmojiItemView(emoji = emoji, modifier = Modifier.widthIn(max = 60.dp))
+    Box(
+        modifier = Modifier.fillMaxSize(),
+        contentAlignment = Alignment.Center
+    ) {
+        when (verificationFlowStep.data) {
+            is SessionVerificationData.Decimals -> {
+                val text = verificationFlowStep.data.decimals.joinToString(separator = " - ") { it.toString() }
+                Text(
+                    modifier = Modifier.fillMaxWidth(),
+                    text = text,
+                    style = ElementTheme.typography.fontHeadingLgBold,
+                    color = MaterialTheme.colorScheme.primary,
+                    textAlign = TextAlign.Center,
+                )
+            }
+            is SessionVerificationData.Emojis -> {
+                // We want each row to have up to 4 emojis
+                val rows = verificationFlowStep.data.emojis.chunked(4)
+                Column(
+                    modifier = Modifier.fillMaxWidth(),
+                    verticalArrangement = Arrangement.spacedBy(40.dp),
+                ) {
+                    rows.forEach { emojis ->
+                        Row(modifier = Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.SpaceEvenly) {
+                            for (emoji in emojis) {
+                                EmojiItemView(emoji = emoji, modifier = Modifier.widthIn(max = 60.dp))
+                            }
                         }
                     }
                 }
@@ -402,6 +436,7 @@ private fun BottomMenu(
 internal fun VerifySelfSessionViewPreview(@PreviewParameter(VerifySelfSessionStateProvider::class) state: VerifySelfSessionState) = ElementPreview {
     VerifySelfSessionView(
         state = state,
+        onLearnMoreClick = {},
         onEnterRecoveryKey = {},
         onResetKey = {},
         onFinish = {},

features/verifysession/impl/src/test/kotlin/io/element/android/features/verifysession/impl/VerifySelfSessionViewTest.kt

@@ -146,6 +146,22 @@ class VerifySelfSessionViewTest {
         }
     }
 
+    @Config(qualifiers = "h1024dp")
+    @Test
+    fun `clicking on learn more invokes the expected callback`() {
+        val eventsRecorder = EventsRecorder<VerifySelfSessionViewEvents>(expectEvents = false)
+        ensureCalledOnce { callback ->
+            rule.setVerifySelfSessionView(
+                aVerifySelfSessionState(
+                    verificationFlowStep = VerifySelfSessionState.VerificationStep.Initial(true),
+                    eventSink = eventsRecorder
+                ),
+                onLearnMoreClick = callback,
+            )
+            rule.clickOn(CommonStrings.action_learn_more)
+        }
+    }
+
     @Test
     fun `clicking on they match emits the expected event`() {
         val eventsRecorder = EventsRecorder<VerifySelfSessionViewEvents>()
@@ -222,6 +238,7 @@ class VerifySelfSessionViewTest {
 
     private fun <R : TestRule> AndroidComposeTestRule<R, ComponentActivity>.setVerifySelfSessionView(
         state: VerifySelfSessionState,
+        onLearnMoreClick: () -> Unit = EnsureNeverCalled(),
         onEnterRecoveryKey: () -> Unit = EnsureNeverCalled(),
         onFinished: () -> Unit = EnsureNeverCalled(),
         onResetKey: () -> Unit = EnsureNeverCalled(),
@@ -230,6 +247,7 @@ class VerifySelfSessionViewTest {
         setContent {
             VerifySelfSessionView(
                 state = state,
+                onLearnMoreClick = onLearnMoreClick,
                 onEnterRecoveryKey = onEnterRecoveryKey,
                 onFinish = onFinished,
                 onResetKey = onResetKey,