☕️ Add ModelAuthenticatable

Sources/VaporBridges/Protocols/ModelAuthenticatable.swift

@@ -0,0 +1,56 @@
+//
+//  ModelAuthenticatable.swift
+//  
+//
+//  Created by Mihael Isaev on 12.02.2022.
+//
+
+import Vapor
+import Bridges
+
+public protocol ModelAuthenticatable: Table, Authenticatable {
+    static var usernameKey: KeyPath<Self, Column<String>> { get }
+    static var passwordHashKey: KeyPath<Self, Column<String>> { get }
+    func verify(password: String) throws -> Bool
+}
+
+extension ModelAuthenticatable {
+    public static func authenticator(
+        database: DatabaseIdentifier
+    ) -> Authenticator {
+        ModelAuthenticator<Self>(database: database)
+    }
+
+    var _$username: Column<String> {
+        self[keyPath: Self.usernameKey]
+    }
+
+    var _$passwordHash: Column<String> {
+        self[keyPath: Self.passwordHashKey]
+    }
+}
+
+private struct ModelAuthenticator<User>: BasicAuthenticator
+    where User: ModelAuthenticatable
+{
+    public let database: DatabaseIdentifier
+
+    public func authenticate(
+        basic: BasicAuthorization,
+        for request: Request
+    ) -> EventLoopFuture<Void> {
+        User.query(on: database, on: request)
+            .where(\User._$username == basic.username)
+            .first()
+            .flatMapThrowing
+        {
+            guard let user = $0 else {
+                return
+            }
+            guard try user.verify(password: basic.password) else {
+                return
+            }
+            request.auth.login(user)
+        }
+    }
+}