Add core

packages/medusa/src/services/auth.js

@@ -0,0 +1,42 @@
+import bcrypt from "bcrypt"
+import { BaseService } from "../interfaces"
+
+/**
+ * Can authenticate a user based on email password combination
+ * @implements BaseService
+ */
+class AuthService extends BaseService {
+  /** @param { userModel: (UserModel) } */
+  constructor({ userModel }) {
+    super()
+    /** @private @const {UserModel} */
+    this.userModel_ = userModel
+  }
+
+  /**
+   * Authenticates a given user based on an email, password combination. Uses
+   * bcrypt to match password with hashed value.
+   * @param {string} email - the email of the user
+   * @param {string} password - the password of the user
+   * @return {{ success: (bool), user: (object | undefined) }}
+   *    success: whether authentication succeeded
+   *    user: the user document if authentication succeded
+   */
+  async authenticate(email, password) {
+    const user = await this.userModel_.findOne({ email })
+    const passwordsMatch = await bcrypt.compare(password, user.passwordHash)
+
+    if (passwordsMatch) {
+      return {
+        success: true,
+        user,
+      }
+    } else {
+      return {
+        success: false,
+      }
+    }
+  }
+}
+
+export default AuthService