admin: implement user deletion

1 files changed, 218 insertions, 0 deletions

diff --git a/frontend/src/components/admin/UserDeletion.tsx b/frontend/src/components/admin/UserDeletion.tsx
new file mode 100644
index 0000000..2de7b50
--- /dev/null
+++ b/frontend/src/components/admin/UserDeletion.tsx
@@ -0,0 +1,218 @@
+import { useState } from 'react';
+
+interface User {
+  id: number;
+  username: string;
+  isAdmin: boolean;
+}
+
+interface UserDeletionProps {
+  onUserDeleted?: () => void;
+}
+
+const UserDeletion = ({ onUserDeleted }: UserDeletionProps) => {
+  const [userId, setUserId] = useState('');
+  const [userToDelete, setUserToDelete] = useState<User | null>(null);
+  const [isSearching, setIsSearching] = useState(false);
+  const [isDeleting, setIsDeleting] = useState(false);
+  const [showConfirmation, setShowConfirmation] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const handleSearchUser = async () => {
+    if (!userId.trim()) {
+      setError('Please enter a user ID');
+      return;
+    }
+
+    const id = parseInt(userId);
+    if (isNaN(id) || id <= 0) {
+      setError('Please enter a valid user ID');
+      return;
+    }
+
+    setIsSearching(true);
+    setError(null);
+    setUserToDelete(null);
+
+    try {
+      const response = await fetch(`${import.meta.env.VITE_API_URL}/me?userId=${id}`, {
+        method: 'GET',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        credentials: 'include',
+      });
+
+      if (!response.ok) {
+        if (response.status === 404) {
+          throw new Error('User not found');
+        }
+        const error = await response.json();
+        throw new Error(error.error || 'Failed to find user');
+      }
+
+      const data = await response.json();
+      setUserToDelete(data.user);
+    } catch (error) {
+      console.error('Failed to search user:', error);
+      setError(error instanceof Error ? error.message : 'Failed to search user');
+    } finally {
+      setIsSearching(false);
+    }
+  };
+
+  const handleDeleteUser = async () => {
+    if (!userToDelete) return;
+
+    setIsDeleting(true);
+    setError(null);
+
+    try {
+      const response = await fetch(`${import.meta.env.VITE_API_URL}/admin/user/${userToDelete.id}`, {
+        method: 'DELETE',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        credentials: 'include',
+      });
+
+      if (!response.ok) {
+        const error = await response.json();
+        throw new Error(error.error || 'Failed to delete user');
+      }
+
+      alert(`User "${userToDelete.username}" has been successfully deleted.`);
+
+      // Reset form
+      setUserId('');
+      setUserToDelete(null);
+      setShowConfirmation(false);
+
+      // Call callback if provided
+      onUserDeleted?.();
+
+    } catch (error) {
+      console.error('Failed to delete user:', error);
+      setError(error instanceof Error ? error.message : 'Failed to delete user');
+    } finally {
+      setIsDeleting(false);
+    }
+  };
+
+  const resetForm = () => {
+    setUserId('');
+    setUserToDelete(null);
+    setShowConfirmation(false);
+    setError(null);
+  };
+
+  return (
+    <>
+      <p className="text-slate-300 leading-relaxed mb-6 p-4 bg-slate-800/50 rounded-md border-l-4 border-red-500">
+        <strong className="text-red-400">Warning:</strong> This action is irreversible. Deleting a user will permanently remove their account and all associated data including scores and statistics.
+      </p>
+
+      {error && (
+        <div className="mb-6 p-4 bg-red-900/30 border border-red-700 rounded-md">
+          <p className="text-red-400">{error}</p>
+        </div>
+      )}
+
+      <div className="space-y-6">
+        {/* Search User Section */}
+        <div className="space-y-4">
+          <div>
+            <label htmlFor="userId" className="block text-sm font-medium text-slate-300 mb-2">
+              User ID
+            </label>
+            <div className="flex gap-3">
+              <input
+                type="number"
+                id="userId"
+                value={userId}
+                onChange={(e) => setUserId(e.target.value)}
+                className="flex-1 px-3 py-2 bg-slate-800 border border-slate-600 rounded-md text-white placeholder-slate-400 focus:outline-none focus:ring-2 focus:ring-violet-500 focus:border-transparent"
+                placeholder="Enter user ID to search"
+                min="1"
+                disabled={isSearching}
+              />
+              <button
+                onClick={handleSearchUser}
+                disabled={isSearching || !userId.trim()}
+                className="bg-violet-600 hover:bg-violet-700 disabled:bg-violet-800 disabled:cursor-not-allowed text-white font-medium px-4 py-2 rounded-md transition-colors"
+              >
+                {isSearching ? 'Searching...' : 'Search'}
+              </button>
+            </div>
+          </div>
+        </div>
+
+        {/* User Details Section */}
+        {userToDelete && !showConfirmation && (
+          <div className="p-4 bg-slate-800 border border-slate-600 rounded-md">
+            <h3 className="text-lg font-semibold text-white mb-3">User Found</h3>
+            <div className="space-y-2 text-sm">
+              <p className="text-slate-300">
+                <span className="text-slate-400">ID:</span> {userToDelete.id}
+              </p>
+              <p className="text-slate-300">
+                <span className="text-slate-400">Username:</span> {userToDelete.username}
+              </p>
+              <p className="text-slate-300">
+                <span className="text-slate-400">Admin Status:</span>{' '}
+                <span className={userToDelete.isAdmin ? 'text-yellow-400' : 'text-green-400'}>
+                  {userToDelete.isAdmin ? 'Admin' : 'Regular User'}
+                </span>
+              </p>
+            </div>
+            <div className="flex gap-3 mt-4">
+              <button
+                onClick={() => setShowConfirmation(true)}
+                className="bg-red-600 hover:bg-red-700 text-white font-medium px-4 py-2 rounded-md transition-colors"
+              >
+                Delete User
+              </button>
+              <button
+                onClick={resetForm}
+                className="bg-slate-600 hover:bg-slate-700 text-white font-medium px-4 py-2 rounded-md transition-colors"
+              >
+                Cancel
+              </button>
+            </div>
+          </div>
+        )}
+
+        {/* Confirmation Section */}
+        {showConfirmation && userToDelete && (
+          <div className="p-4 bg-red-900/20 border border-red-600 rounded-md">
+            <h3 className="text-lg font-semibold text-red-400 mb-3">Confirm Deletion</h3>
+            <p className="text-slate-300 mb-4">
+              Are you absolutely sure you want to delete the user <strong className="text-white">"{userToDelete.username}"</strong>?
+            </p>
+            <p className="text-sm text-red-300 mb-4">
+              This action cannot be undone. All user data, scores, and statistics will be permanently deleted.
+            </p>
+            <div className="flex gap-3">
+              <button
+                onClick={handleDeleteUser}
+                disabled={isDeleting}
+                className="bg-red-600 hover:bg-red-700 disabled:bg-red-800 disabled:cursor-not-allowed text-white font-medium px-4 py-2 rounded-md transition-colors"
+              >
+                {isDeleting ? 'Deleting...' : 'Yes, Delete User'}
+              </button>
+              <button
+                onClick={() => setShowConfirmation(false)}
+                disabled={isDeleting}
+                className="bg-slate-600 hover:bg-slate-700 disabled:bg-slate-700 disabled:cursor-not-allowed text-white font-medium px-4 py-2 rounded-md transition-colors"
+              >
+                Cancel
+              </button>
+            </div>
+          </div>
+        )}
+      </div>
+    </>
+  );
+};
+
+export default UserDeletion;