Fix API early Stat Point allocation (#10680)

* Refactor hasClass check to common so it can be used in shared & server-side code

* Check that user has selected class before allocating stat points

test/common/libs/hasClass.test.js

@@ -0,0 +1,52 @@
+import hasClass from '../../../website/common/script/libs/hasClass';
+import { generateUser } from '../../helpers/common.helper';
+
+describe('hasClass', () => {
+  it('returns false for user with level below 10', () => {
+    let userLvl9 = generateUser({
+      'stats.lvl': 9,
+      'flags.classSelected': true,
+      'preferences.disableClasses': false,
+    });
+
+    let result = hasClass(userLvl9);
+
+    expect(result).to.eql(false);
+  });
+
+  it('returns false for user with class not selected', () => {
+    let userClassNotSelected = generateUser({
+      'stats.lvl': 10,
+      'flags.classSelected': false,
+      'preferences.disableClasses': false,
+    });
+
+    let result = hasClass(userClassNotSelected);
+
+    expect(result).to.eql(false);
+  });
+
+  it('returns false for user with classes disabled', () => {
+    let userClassesDisabled = generateUser({
+      'stats.lvl': 10,
+      'flags.classSelected': true,
+      'preferences.disableClasses': true,
+    });
+
+    let result = hasClass(userClassesDisabled);
+
+    expect(result).to.eql(false);
+  });
+
+  it('returns true for user with class', () => {
+    let userClassSelected = generateUser({
+      'stats.lvl': 10,
+      'flags.classSelected': true,
+      'preferences.disableClasses': false,
+    });
+
+    let result = hasClass(userClassSelected);
+
+    expect(result).to.eql(true);
+  });
+});