Refactor Purchase API - Part 1 (#9714)

* move to shops/purchase

* move files to /buy/ instead of /purchase/

* refactor buy.js - add more itemtypes

* revert moving special purchases to buy

* only use buyOp from api-routes

* fix buying potion client-side

* undo import buy instead of purchase

* enable potion bulk purchase - use buyGear as fallback (as before)

* move quantity purchase inside buyHealthPotion

* move quantity purchase inside buyQuest

* move quantity purchase inside buySpecialSpell + add analytics

* remove unused quantity variable - set req.type on specialKeys

* fix `buyKnownKeys` on buy api

* test buy-special-spell if not enough gold

* more buy ops coverage

* fix lint

* buyMysterySet: test for window.confirm, buyQuest: check for Masterclassers unlock

* fix test & lint

* re-create package-lock.json to travis build ?

* use global.window instead of method argument

* add back canOwn checks

* remove buyMysterySet confirm request

test/api/v3/integration/user/buy/POST-user_buy_special_spell.test.js

@@ -40,4 +40,19 @@ describe('POST /user/buy-special-spell/:key', () => {
       itemText: item.text(),
     }));
   });
+
+  it('returns an error if user does not have enough gold', async () => {
+    let key = 'thankyou';
+
+    await user.update({
+      'stats.gp': 5,
+    });
+
+    await expect(user.post(`/user/buy-special-spell/${key}`))
+      .to.eventually.be.rejected.and.eql({
+        code: 401,
+        error: 'NotAuthorized',
+        message: t('messageNotEnoughGold'),
+      });
+  });
 });