android: add tailnet deletion dialog (#682)

Add dialog for deleting tailnet in user switcher view.

Fixes tailscale/corp#31024

Signed-off-by: kari-ts <kari@tailscale.com>

android/src/main/java/com/tailscale/ipn/ui/model/NetMap.kt

@@ -15,7 +15,8 @@ class Netmap {
       var Domain: String,
       var UserProfiles: Map<String, Tailcfg.UserProfile>,
       var TKAEnabled: Boolean,
-      var DNS: Tailcfg.DNSConfig? = null
+      var DNS: Tailcfg.DNSConfig? = null,
+      var AllCaps: List<String> = emptyList()
   ) {
     // Keys are tailcfg.UserIDs thet get stringified
     // Helpers
@@ -51,5 +52,9 @@ class Netmap {
           UserProfiles == other.UserProfiles &&
           TKAEnabled == other.TKAEnabled
     }
+
+    fun hasCap(capability: String): Boolean {
+      return AllCaps.contains(capability)
+    }  
   }
 }

android/src/main/java/com/tailscale/ipn/ui/view/UserSwitcherView.kt

@@ -3,6 +3,8 @@
 
 package com.tailscale.ipn.ui.view
 
+import android.content.Intent
+import android.net.Uri
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
@@ -10,8 +12,10 @@ import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.text.ClickableText
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.MoreVert
+import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.DropdownMenu
 import androidx.compose.material3.DropdownMenuItem
 import androidx.compose.material3.ExperimentalMaterial3Api
@@ -20,13 +24,19 @@ import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.SpanStyle
+import androidx.compose.ui.text.buildAnnotatedString
+import androidx.compose.ui.text.withStyle
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
@@ -46,10 +56,14 @@ data class UserSwitcherNav(
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun UserSwitcherView(nav: UserSwitcherNav, viewModel: UserSwitcherViewModel = viewModel()) {
-
   val users by viewModel.loginProfiles.collectAsState()
   val currentUser by viewModel.loggedInUser.collectAsState()
   val showHeaderMenu by viewModel.showHeaderMenu.collectAsState()
+  var showDeleteDialog by remember { mutableStateOf(false) }
+  val context = LocalContext.current
+  val netmapState by viewModel.netmap.collectAsState()
+  val capabilityIsOwner = "https://tailscale.com/cap/is-owner"
+  val isOwner = netmapState?.hasCap(capabilityIsOwner) == true
 
   Scaffold(
       topBar = {
@@ -138,10 +152,47 @@ fun UserSwitcherView(nav: UserSwitcherNav, viewModel: UserSwitcherViewModel = vi
                           }
                         })
                   }
+
+                  Lists.SectionDivider()
+                  Setting.Text(R.string.delete_tailnet, destructive = true) {
+                    showDeleteDialog = true
+                  }
                 }
               }
             }
       }
+
+  if (showDeleteDialog) {
+    AlertDialog(
+        onDismissRequest = { showDeleteDialog = false },
+        title = { Text(text = stringResource(R.string.delete_tailnet)) },
+        text = {
+          if (isOwner) {
+            OwnerDeleteDialogText {
+              val uri = Uri.parse("https://login.tailscale.com/admin/settings/general")
+              context.startActivity(Intent(Intent.ACTION_VIEW, uri))
+            }
+          } else {
+            Text(stringResource(R.string.request_deletion_nonowner))
+          }
+        },
+        confirmButton = {
+          TextButton(
+              onClick = {
+                val intent =
+                    Intent(Intent.ACTION_VIEW, Uri.parse("https://tailscale.com/contact/support"))
+                context.startActivity(intent)
+                showDeleteDialog = false
+              }) {
+                Text(text = stringResource(R.string.contact_support))
+              }
+        },
+        dismissButton = {
+          TextButton(onClick = { showDeleteDialog = false }) {
+            Text(text = stringResource(R.string.cancel))
+          }
+        })
+  }
 }
 
 @Composable
@@ -171,6 +222,41 @@ fun FusMenu(
       }
 }
 
+@Composable
+fun OwnerDeleteDialogText(onSettingsClick: () -> Unit) {
+  val part1 = stringResource(R.string.request_deletion_owner_part1)
+  val part2a = stringResource(R.string.request_deletion_owner_part2a)
+  val part2b = stringResource(R.string.request_deletion_owner_part2b)
+
+  val annotatedText = buildAnnotatedString {
+    append(part1 + " ")
+
+    pushStringAnnotation(
+        tag = "settings", annotation = "https://login.tailscale.com/admin/settings/general")
+    withStyle(style = SpanStyle(color = MaterialTheme.colorScheme.primary)) {
+      append("Settings > General")
+    }
+    pop()
+
+    append(" $part2a\n\n") // newline after "Delete tailnet."
+    append(part2b)
+  }
+
+  val context = LocalContext.current
+  ClickableText(
+      text = annotatedText,
+      style = MaterialTheme.typography.bodyMedium.copy(color = MaterialTheme.colorScheme.onSurface),
+      onClick = { offset ->
+        annotatedText
+            .getStringAnnotations(tag = "settings", start = offset, end = offset)
+            .firstOrNull()
+            ?.let { annotation ->
+              val intent = Intent(Intent.ACTION_VIEW, Uri.parse(annotation.item))
+              context.startActivity(intent)
+            }
+      })
+}
+
 @Composable
 fun MenuItem(text: String, onClick: () -> Unit) {
   DropdownMenuItem(

android/src/main/res/values/strings.xml

@@ -137,6 +137,20 @@
     <string name="custom_control_url_title">Custom control server URL</string>
     <string name="auth_key_input_title">Auth key</string>
 
+    <string name="delete_tailnet">Delete tailnet</string>
+    <string name="contact_support">Contact support</string>
+    <string name="request_deletion_nonowner">All requests related to the removal or deletion of data are handled by our Support team. To open a request, tap the Contact Support button below to be taken to our contact form in the browser. Complete the form, and a Customer Support Engineer will work with you directly to assist.</string>
+    <string name="request_deletion_owner_part1">
+    As the owner of this tailnet, to remove yourself from the tailnet you can either reassign ownership and contact our Support team, or delete the whole tailnet through the admin console. To do the latter, go to
+</string>
+<string name="request_deletion_owner_part2a">
+    and look for “Delete tailnet”.
+</string>
+
+<string name="request_deletion_owner_part2b">
+    All requests related to the removal or deletion of data are handled by our Support team. To open a request, tap the Contact Support button below to be taken to our contact form in the browser. Complete the form, and a Customer Support Engineer will work with you directly to assist.
+</string>
+
     <!-- Strings for ExitNode picker -->
     <string name="choose_exit_node">Choose exit node</string>
     <string name="choose_mullvad_exit_node">Mullvad exit nodes</string>