Add Vuex state to integration form

Add state for override and overrideAvailable to disable all
form fields

app/assets/javascripts/integrations/edit/index.js

 import Vue from 'vue';
+import { createStore } from './store';
 import { parseBoolean } from '~/lib/utils/common_utils';
 import IntegrationForm from './components/integration_form.vue';
 
@@ -37,6 +38,7 @@ export default el => {
 
   return new Vue({
     el,
+    store: createStore(),
     render(createElement) {
       return createElement(IntegrationForm, {
         props: {

app/assets/javascripts/integrations/edit/store/actions.js

+import * as types from './mutation_types';
+
+export const setOverride = ({ commit }, override) => commit(types.SET_OVERRIDE, override);
+
+export const setOverrideAvailable = ({ commit }, overrideAvailable) =>
+  commit(types.SET_OVERRIDE_AVAILABLE, overrideAvailable);

app/assets/javascripts/integrations/edit/store/getters.js

+// eslint-disable-next-line import/prefer-default-export
+export const disableForm = state => state.overrideAvailable && !state.override;

app/assets/javascripts/integrations/edit/store/index.js

+import Vue from 'vue';
+import Vuex from 'vuex';
+import * as actions from './actions';
+import * as getters from './getters';
+import mutations from './mutations';
+import state from './state';
+
+Vue.use(Vuex);
+
+export const createStore = () =>
+  new Vuex.Store({
+    actions,
+    getters,
+    mutations,
+    state,
+  });
+export default createStore();

app/assets/javascripts/integrations/edit/store/mutation_types.js

+export const SET_OVERRIDE = 'SET_OVERRIDE';
+export const SET_OVERRIDE_AVAILABLE = 'SET_OVERRIDE_AVAILABLE';

app/assets/javascripts/integrations/edit/store/mutations.js

+import * as types from './mutation_types';
+
+export default {
+  [types.SET_OVERRIDE](state, override) {
+    state.override = override;
+  },
+
+  [types.SET_OVERRIDE_AVAILABLE](state, overrideAvailable) {
+    state.overrideAvailable = overrideAvailable;
+  },
+};

app/assets/javascripts/integrations/edit/store/state.js

+export default () => ({
+  override: false,
+  overrideAvailable: true, // TODO: Should default to false and be passed from the backend
+});