getting password hashing into a hook where it could be async

Signed-off-by: Claudius <opensource@amenthes.de>

lib/models/user.js

@@ -41,11 +41,7 @@ module.exports = function (sequelize, DataTypes) {
       }
     },
     password: {
-      type: Sequelize.TEXT,
+      type: Sequelize.TEXT
-      set: function (value) {
-        var hash = scrypt.kdfSync(value, scrypt.paramsSync(0.1)).toString('hex')
-        this.setDataValue('password', hash)
-      }
     }
   }, {
     instanceMethods: {
@@ -153,5 +149,17 @@ module.exports = function (sequelize, DataTypes) {
     }
   })
 
+  function updatePasswordHashHook (user, options, done) {
+    // suggested way to hash passwords to be able to do this asynchronously:
+    // @see https://github.com/sequelize/sequelize/issues/1821#issuecomment-44265819
+    if (!user.changed('password')) { return done() }
+    const hash = scrypt.kdfSync(user.get('password'), scrypt.paramsSync(0.1)).toString('hex')
+    user.setDataValue('password', hash)
+    done()
+  }
+
+  User.beforeCreate(updatePasswordHashHook)
+  User.beforeUpdate(updatePasswordHashHook)
+
   return User
 }