feat: add profile link to header and implement user profile update functionality with email and password management

src/services/auth.ts

@@ -66,3 +66,81 @@ export async function getUserById(id: string) {
   });
 }
 
+export interface UpdateProfileInput {
+  name?: string;
+  email?: string;
+}
+
+export async function updateUserProfile(
+  userId: string,
+  input: UpdateProfileInput
+): Promise<AuthResult> {
+  const { name, email } = input;
+
+  // If changing email, check it's not already taken
+  if (email) {
+    const existingUser = await prisma.user.findFirst({
+      where: {
+        email,
+        NOT: { id: userId },
+      },
+    });
+
+    if (existingUser) {
+      return {
+        success: false,
+        error: 'Cet email est déjà utilisé par un autre compte',
+      };
+    }
+  }
+
+  const user = await prisma.user.update({
+    where: { id: userId },
+    data: {
+      ...(name !== undefined && { name: name || null }),
+      ...(email && { email }),
+    },
+  });
+
+  return {
+    success: true,
+    user: {
+      id: user.id,
+      email: user.email,
+      name: user.name,
+    },
+  };
+}
+
+export async function updateUserPassword(
+  userId: string,
+  currentPassword: string,
+  newPassword: string
+): Promise<{ success: boolean; error?: string }> {
+  const { compare } = await import('bcryptjs');
+
+  const user = await prisma.user.findUnique({
+    where: { id: userId },
+  });
+
+  if (!user) {
+    return { success: false, error: 'Utilisateur non trouvé' };
+  }
+
+  // Verify current password
+  const isValid = await compare(currentPassword, user.password);
+  if (!isValid) {
+    return { success: false, error: 'Mot de passe actuel incorrect' };
+  }
+
+  // Hash new password
+  const hashedPassword = await hash(newPassword, 12);
+
+  await prisma.user.update({
+    where: { id: userId },
+    data: { password: hashedPassword },
+  });
+
+  return { success: true };
+}
+