Adding users grid, allowing the change of user roles

src/pages/Dashboard.jsx

@@ -1,20 +1,186 @@
 import React, { useEffect, useState } from "react";
+import config from "../config";
+
+const thStyle = {
+  padding: "0.75rem",
+  backgroundColor: "#333",
+  borderBottom: "1px solid #555",
+  color: "#fff",
+  position: "sticky",
+  top: 0,
+  zIndex: 1,
+  textAlign: "center",
+};
+
+const tdStyle = {
+  padding: "0.5rem 1rem",
+  borderBottom: "1px solid #444",
+  textAlign: "center",
+  color: "#fff",
+};
 
 const Dashboard = () => {
   const [role, setRole] = useState("");
+  const [users, setUsers] = useState([]);
+  const [newRoles, setNewRoles] = useState({});
+  const [selectedUsers, setSelectedUsers] = useState([]);
 
   useEffect(() => {
-    const role = localStorage.getItem("role");
-    if (role) {
-      setRole(role);
+    const currentRole = localStorage.getItem("role");
+    setRole(currentRole);
+
+    if (currentRole === "SUPER") {
+      fetchUsers();
     }
   }, []);
 
+  const fetchUsers = async () => {
+    const token = localStorage.getItem("token");
+
+    try {
+      const res = await fetch(`${config.apiBaseUrl}/api/Auth/users`, {
+        headers: {
+          Authorization: `Bearer ${token}`,
+        },
+      });
+
+      if (!res.ok) throw new Error("Failed to fetch users");
+
+      const data = await res.json();
+      setUsers(data);
+    } catch (err) {
+      console.error("Error fetching users:", err);
+    }
+  };
+
+  const handleRoleChange = (username, value) => {
+    setNewRoles({ ...newRoles, [username]: value });
+  };
+
+  const updateUserRole = async (username) => {
+    const token = localStorage.getItem("token");
+    const newRole = newRoles[username];
+
+    try {
+      const res = await fetch(`${config.apiBaseUrl}/api/Auth/role`, {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/json",
+          Authorization: `Bearer ${token}`,
+        },
+        body: JSON.stringify({ username, newRole }),
+      });
+
+      if (!res.ok) throw new Error("Failed to update role");
+
+      fetchUsers();
+    } catch (err) {
+      console.error("Error updating role:", err);
+    }
+  };
+
+  const toggleUserSelection = (username) => {
+    setSelectedUsers((prev) =>
+      prev.includes(username)
+        ? prev.filter((u) => u !== username)
+        : [...prev, username]
+    );
+  };
+
   return (
     <div style={{ color: "#fff", textAlign: "center", marginTop: "2rem" }}>
       <h1>Dashboard</h1>
       <p>Welcome! You are logged in.</p>
-      {role === "SUPER" && <p style={{ fontWeight: "bold" }}>You are SUPER</p>}
+
+      {role === "SUPER" && (
+        <>
+          <p style={{ fontWeight: "bold" }}>You are SUPER</p>
+
+          <div
+            style={{
+              maxHeight: "320px",
+              overflowY: "auto",
+              margin: "2rem auto 0 auto",
+              width: "fit-content",
+              border: "1px solid #444",
+              borderRadius: "4px",
+            }}
+          >
+            <table style={{ borderCollapse: "collapse", minWidth: "600px" }}>
+              <thead>
+                <tr>
+                  <th style={thStyle}></th>
+                  <th style={thStyle}>Username</th>
+                  <th style={thStyle}>Role</th>
+                  {selectedUsers.length > 0 && (
+                    <th style={thStyle}>Action</th>
+                  )}
+                </tr>
+              </thead>
+              <tbody>
+                {users.map((user) => {
+                  const isSelected = selectedUsers.includes(user.username);
+                  const currentNewRole =
+                    newRoles[user.username] ?? user.role;
+
+                  return (
+                    <tr key={user.username}>
+                      <td style={tdStyle}>
+                        <input
+                          type="checkbox"
+                          checked={isSelected}
+                          onChange={() => toggleUserSelection(user.username)}
+                        />
+                      </td>
+                      <td style={tdStyle}>{user.username}</td>
+                      <td style={tdStyle}>
+                        {isSelected ? (
+                          <select
+                            value={currentNewRole}
+                            onChange={(e) =>
+                              handleRoleChange(user.username, e.target.value)
+                            }
+                            style={{
+                              padding: "0.3rem",
+                              backgroundColor: "#2a2a2a",
+                              color: "#fff",
+                              border: "1px solid #444",
+                            }}
+                          >
+                            <option value="USER">USER</option>
+                            <option value="SUPER">SUPER</option>
+                          </select>
+                        ) : (
+                          user.role
+                        )}
+                      </td>
+                      {selectedUsers.length > 0 && (
+                        <td style={tdStyle}>
+                          {isSelected && (
+                            <button
+                              onClick={() => updateUserRole(user.username)}
+                              style={{
+                                padding: "0.4rem 0.8rem",
+                                backgroundColor: "#444",
+                                color: "#fff",
+                                border: "none",
+                                borderRadius: "4px",
+                                cursor: "pointer",
+                              }}
+                            >
+                              Update
+                            </button>
+                          )}
+                        </td>
+                      )}
+                    </tr>
+                  );
+                })}
+              </tbody>
+            </table>
+          </div>
+        </>
+      )}
     </div>
   );
 };