Adds endpoints to manage customers (#54)

packages/medusa/src/services/auth.js

@@ -6,10 +6,14 @@ import { BaseService } from "medusa-interfaces"
  * @implements BaseService
  */
 class AuthService extends BaseService {
-  constructor({ userService }) {
+  constructor({ userService, customerService }) {
     super()
+
     /** @private @const {UserService} */
     this.userService_ = userService
+
+    /** @private @const {CustomerService} */
+    this.customerService_ = customerService
   }
 
   /**
@@ -38,6 +42,7 @@ class AuthService extends BaseService {
       }
     }
   }
+
   /**
    * Authenticates a given user based on an email, password combination. Uses
    * bcrypt to match password with hashed value.
@@ -70,6 +75,49 @@ class AuthService extends BaseService {
       }
     }
   }
+
+  /**
+   * Authenticates a customer 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
+   *    error: a string with the error message
+   */
+  async authenticateCustomer(email, password) {
+    try {
+      const customer = await this.customerService_.retrieveByEmail(email)
+      if (!customer.password_hash) {
+        return {
+          success: false,
+          error: "Invalid email or password",
+        }
+      }
+
+      const passwordsMatch = await bcrypt.compare(
+        password,
+        customer.password_hash
+      )
+      if (passwordsMatch) {
+        return {
+          success: true,
+          customer,
+        }
+      } else {
+        return {
+          success: false,
+          error: "Invalid email or password",
+        }
+      }
+    } catch (error) {
+      return {
+        success: false,
+        error: "Invalid email or password",
+      }
+    }
+  }
 }
 
 export default AuthService