[client] Allow updating permissions

client/lib/libphylum/actions/action_resource_share.dart

@@ -30,12 +30,13 @@ class ResourceShareAction extends PhylumAction with JsonApiAction {
       {required this.resourceId, required this.resourceName, required this.username, required this.permission, required this.modified});
 
   ResourceShareAction({
-    required Resource r,
+    required String resourceId,
+    required String resourceName,
     required String username,
     required int permission,
   }) : this._(
-          resourceId: r.id,
-          resourceName: r.name,
+          resourceId: resourceId,
+          resourceName: resourceName,
           username: username,
           permission: permission,
           modified: DateTime.now(),

client/lib/ui/explorer/resource_permissions_view.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 
 import 'package:flutter/material.dart';
+import 'package:phylum/libphylum/actions/action_resource_share.dart';
 import 'package:phylum/libphylum/db/db.dart';
 import 'package:phylum/libphylum/phylum_account.dart';
 import 'package:phylum/util/permissions.dart';
@@ -16,6 +17,7 @@ class ResourcePermissionsView extends StatefulWidget {
 }
 
 class _ResourcePermissionsViewState extends State<ResourcePermissionsView> {
+  late String resourceName;
   Map<String, Permission>? inheritedPermissions;
   Map<String, Permission>? permissions;
 
@@ -28,6 +30,7 @@ class _ResourcePermissionsViewState extends State<ResourcePermissionsView> {
       final inheritedPermissions = calculatePermissionSet(data.sublist(0, data.length - 1).map((e) => e.permissions));
       final permissions = mergePermissions(Map.of(inheritedPermissions), data.last.permissions);
       setState(() {
+        resourceName = data.last.name;
         this.inheritedPermissions = inheritedPermissions;
         this.permissions = permissions;
       });
@@ -45,28 +48,85 @@ class _ResourcePermissionsViewState extends State<ResourcePermissionsView> {
     final permissions = this.permissions;
     if (permissions == null) return const CircularProgressIndicator();
 
-    final repository = context.read<PhylumAccount>().userRepository;
+    final account = context.read<PhylumAccount>();
+    final repository = account.userRepository;
+    final userPermissions = permissions[account.userName] ?? 0;
     final entries = permissions.entries.toList(growable: false)
       ..sort(((a, b) {
         return a.value == b.value ? a.key.compareTo(b.key) : a.value.compareTo(b.value);
       }));
-    return Column(
+    return DropdownButtonHideUnderline(
+      child: Column(
+        children: [
+          for (final e in entries)
+            ListTile(
+              visualDensity: VisualDensity.adaptivePlatformDensity,
+              title: Text(repository.getUserDisplayName(e.key)),
+              trailing: DropdownButton<Permission>(
+                items: _createPermissionsItems(),
+                value: e.value,
+                onChanged: (userPermissions & permissionShare) == 0
+                    ? null
+                    : (value) {
+                        if (value == null) return;
+                        account.addAction(ResourceShareAction(
+                          resourceId: widget.resourceId,
+                          resourceName: resourceName,
+                          username: e.key,
+                          permission: value,
+                        ));
+                      },
+              ),
+              // trailing: _getPermissionIcon(e.value),
+            ),
+        ],
+      ),
+    );
+  }
+
+  List<DropdownMenuItem<Permission>> _createPermissionsItems() {
+    return [
+      _buildDropdownMenuItem(permissionSetNone),
+      _buildDropdownMenuItem(permissionSetReadOnly),
+      _buildDropdownMenuItem(permissionSetReadWrite),
+      _buildDropdownMenuItem(permissionSetReadWriteShare),
+      _buildDropdownMenuItem(permissionSetAll),
+    ];
+  }
+
+  DropdownMenuItem<Permission> _buildDropdownMenuItem(Permission p) {
+    return DropdownMenuItem(value: p, child: _buildTile(p));
+  }
+
+  Widget _buildTile(Permission p) {
+    return Row(
+      mainAxisSize: MainAxisSize.min,
+      mainAxisAlignment: MainAxisAlignment.start,
       children: [
-        for (final e in entries)
-          ListTile(
-            title: Text(repository.getUserDisplayName(e.key)),
-            trailing: _getPermissionIcon(e.value),
-          ),
+        Padding(
+          padding: const EdgeInsets.only(right: 8.0),
+          child: _getIcon(p),
+        ),
+        Text(_getText(p)),
       ],
     );
   }
 
-  Icon? _getPermissionIcon(Permission p) {
-    if (p == 0) return null;
+  Icon _getIcon(Permission p) {
+    if (p == 0) return const Icon(Icons.block);
     if (p == -1) return const Icon(Icons.shield_outlined);
-    if (p == permissionRead) return const Icon(Icons.visibility);
-    if (p == (permissionRead | permissionWrite)) return const Icon(Icons.edit);
-    if (p == (permissionRead | permissionWrite | permissionShare)) return const Icon(Icons.person_add);
+    if (p == permissionSetReadOnly) return const Icon(Icons.visibility);
+    if (p == permissionSetReadWrite) return const Icon(Icons.edit);
+    if (p == permissionSetReadWriteShare) return const Icon(Icons.person_add);
     return const Icon(Icons.settings);
   }
+
+  String _getText(Permission p) {
+    if (p == 0) return 'None';
+    if (p == -1) return 'Admin';
+    if (p == permissionSetReadOnly) return 'Viewer';
+    if (p == permissionSetReadWrite) return 'Collaborator';
+    if (p == permissionSetReadWriteShare) return 'Editor';
+    return 'Custom';
+  }
 }

client/lib/util/permissions.dart

@@ -6,6 +6,12 @@ const Permission permissionRead = 4;
 const Permission permissionWrite = 32;
 const Permission permissionShare = 128;
 
+const Permission permissionSetNone = 0;
+const Permission permissionSetAll = -1;
+const Permission permissionSetReadOnly = permissionRead;
+const Permission permissionSetReadWrite = permissionRead | permissionWrite;
+const Permission permissionSetReadWriteShare = permissionRead | permissionWrite | permissionShare;
+
 Map<String, Permission> calculatePermissionSet(Iterable<String?> permissionJsons) {
   final permissions = <String, Permission>{};
   for (final p in permissionJsons) {