Use NIOThreadPool for all Bcrypt operations (#78)

* auth-jwt: Run password hash on NIOThreadPool

* Remove unused function

auth-jwt/Sources/App/Controllers/UserController.swift

@@ -43,7 +43,7 @@ struct UserController<Context: AuthRequestContext> {
         // if user already exist throw conflict
         guard existingUser == nil else { throw HTTPError(.conflict) }
 
-        let user = User(from: createUser)
+        let user = try await User(from: createUser)
         try await user.save(on: db)
 
         return .init(status: .created, response: UserResponse(from: user))

auth-jwt/Sources/App/Models/User.swift

@@ -16,6 +16,7 @@ import FluentKit
 import Foundation
 import Hummingbird
 import HummingbirdAuth
+import NIOPosix
 
 /// Database description of a user
 final class User: Model {
@@ -38,10 +39,14 @@ final class User: Model {
         self.passwordHash = passwordHash
     }
 
-    internal init(from userRequest: CreateUserRequest) {
+    internal init(from userRequest: CreateUserRequest) async throws {
         self.id = nil
         self.name = userRequest.name
-        self.passwordHash = userRequest.password.map { Bcrypt.hash($0, cost: 12) }
+        if let password = userRequest.password {
+            self.passwordHash = try await NIOThreadPool.singleton.runIfActive { Bcrypt.hash(password, cost: 12) }
+        } else {
+            self.passwordHash = nil
+        }
     }
 }
 
@@ -82,4 +87,4 @@ struct AuthenticatedUser: Authenticatable {
         self.id = try user.requireID()
         self.name = user.name
     }
-}
+}

todos-auth-fluent/Sources/App/Models/User.swift

@@ -46,12 +46,6 @@ final class User: Model, Authenticatable, @unchecked Sendable {
         self.email = email
         self.passwordHash = passwordHash
     }
-
-    internal init(from userRequest: CreateUserRequest) {
-        self.id = nil
-        self.name = userRequest.name
-        self.passwordHash = Bcrypt.hash(userRequest.password, cost: 12)
-    }
 }
 
 extension User {