android: expand SAF FileOps implementation

This expands the SAF FileOps to implement the refactored FileOps

Updates tailscale/corp#29211

Signed-off-by: kari-ts <[email protected]>

Author: kari-ts

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/util/OutputStreamAdapter.kt

@@ -8,19 +8,16 @@ import java.io.OutputStream
 
 // This class adapts a Java OutputStream to the libtailscale.OutputStream interface.
 class OutputStreamAdapter(private val outputStream: OutputStream) : libtailscale.OutputStream {
-  // writes data to the outputStream in its entirety. Returns -1 on error.
-  override fun write(data: ByteArray): Long {
-    return try {
-      outputStream.write(data)
-      outputStream.flush()
-      data.size.toLong()
-    } catch (e: Exception) {
-      TSLog.d("OutputStreamAdapter", "write exception: $e")
-      -1L
+    // Write the entire buffer.  If the underlying stream throws,
+    // gomobile will convert the IOException into a Go error and
+    // io.Copy will stop immediately.
+    override fun write(data: ByteArray): Long {
+        outputStream.write(data)      // may throw IOException=
+        return data.size.toLong()     // reached only on success
+    }
+    override fun close() {
+        try { outputStream.flush() } catch (_: Exception) { /* ignore */ }
+        outputStream.close()
     }
-  }
-
-  override fun close() {
-    outputStream.close()
-  }
 }
+

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
@@ -12,6 +14,7 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyColumn
 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
@@ -20,12 +23,15 @@ 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.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
@@ -50,6 +56,11 @@ fun UserSwitcherView(nav: UserSwitcherNav, viewModel: UserSwitcherViewModel = vi
   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 netmap = viewModel.netmap.collectAsState()
+  val CapabilityIsOwner = "https://tailscale.com/capability/is-owner"
+  val isOwner = netmap.value?.hasCap(CapabilityIsOwner) == true
 
   Scaffold(
       topBar = {
@@ -138,10 +149,41 @@ 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 = { Text(text = stringResource(if (isOwner) R.string.request_deletion_owner else R.string.request_deletion_nonowner)) },
+        confirmButton = {
+          TextButton(
+              onClick = {
+                // Call into your ViewModel
+                // viewModel.onDeleteClicked(viewModel.currentTailnetId)
+
+                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