POC: GraphQL Startup.js

app/assets/javascripts/repository/index.js

@@ -12,12 +12,17 @@ import { setTitle } from './utils/title';
 import { updateFormAction } from './utils/dom';
 import { convertObjectPropsToCamelCase, parseBoolean } from '../lib/utils/common_utils';
 import { __ } from '../locale';
+import PathLastCommitQuery from './queries/path_last_commit.query.graphql';
 
 export default function setupVueRepositoryList() {
   const el = document.getElementById('js-tree-list');
   const { dataset } = el;
   const { projectPath, projectShortPath, ref, escapedRef, fullName } = dataset;
   const router = createRouter(projectPath, escapedRef);
+  const pathRegex = /-\/tree\/[^/]+\/(.+$)/;
+  const matches = window.location.href.match(pathRegex);
+
+  const currentRoutePath = matches ? matches[1] : '';
 
   apolloProvider.clients.defaultClient.cache.writeData({
     data: {
@@ -29,6 +34,43 @@ export default function setupVueRepositoryList() {
     },
   });
 
+  const initLastCommitApp = () =>
+    new Vue({
+      el: document.getElementById('js-last-commit'),
+      router,
+      apolloProvider,
+      render(h) {
+        return h(LastCommit, {
+          props: {
+            currentPath: this.$route.params.path,
+          },
+        });
+      },
+    });
+
+  if (window.gl.startup_graphql_calls) {
+    const query = window.gl.startup_graphql_calls.find(
+      call => call.operationName === 'pathLastCommit',
+    );
+    query.fetchCall
+      .then(res => res.json())
+      .then(res => {
+        apolloProvider.clients.defaultClient.writeQuery({
+          query: PathLastCommitQuery,
+          data: res.data,
+          variables: {
+            projectPath,
+            ref,
+            path: currentRoutePath,
+          },
+        });
+      })
+      .catch(() => {})
+      .finally(() => initLastCommitApp());
+  } else {
+    initLastCommitApp();
+  }
+
   router.afterEach(({ params: { path } }) => {
     setTitle(path, ref, fullName);
   });
@@ -77,20 +119,6 @@ export default function setupVueRepositoryList() {
     });
   }
 
-  // eslint-disable-next-line no-new
-  new Vue({
-    el: document.getElementById('js-last-commit'),
-    router,
-    apolloProvider,
-    render(h) {
-      return h(LastCommit, {
-        props: {
-          currentPath: this.$route.params.path,
-        },
-      });
-    },
-  });
-
   const treeHistoryLinkEl = document.getElementById('js-tree-history-link');
   const { historyLink } = treeHistoryLinkEl.dataset;
 

app/assets/javascripts/repository/queries/path_last_commit.query.graphql

 query pathLastCommit($projectPath: ID!, $path: String, $ref: String!) {
   project(fullPath: $projectPath) {
+    __typename
     repository {
+      __typename
       tree(path: $path, ref: $ref) {
+        __typename
         lastCommit {
+          __typename
           sha
           title
           titleHtml
@@ -13,15 +17,20 @@ query pathLastCommit($projectPath: ID!, $path: String, $ref: String!) {
           authorName
           authorGravatar
           author {
+            __typename
             name
             avatarUrl
             webPath
           }
           signatureHtml
           pipelines(ref: $ref, first: 1) {
+            __typename
             edges {
+              __typename
               node {
+                __typename
                 detailedStatus {
+                  __typename
                   detailsPath
                   icon
                   tooltip

app/helpers/startupjs_helper.rb

+# frozen_string_literal: true
+
+module StartupjsHelper
+  def page_startup_graphql_calls
+    @graphql_startup_calls
+  end
+
+  def add_page_startup_graphql_call(query, variables = {})
+    @graphql_startup_calls ||= []
+    query_str = File.read(File.join(Rails.root, "app/assets/javascripts/#{query}.query.graphql"))
+    @graphql_startup_calls << { query: query_str, variables: variables }
+  end
+end

app/views/layouts/_startup_js.html.haml

-- return unless page_startup_api_calls.present?
+- return unless page_startup_api_calls.present? || page_startup_graphql_calls.present?
 
 = javascript_tag nonce: true do
   :plain
     var gl = window.gl || {};
     gl.startup_calls = #{page_startup_api_calls.to_json};
+    gl.startup_graphql_calls = #{page_startup_graphql_calls.to_json};
+
     if (gl.startup_calls && window.fetch) {
       Object.keys(gl.startup_calls).forEach(apiCall => {
         // fetch won’t send cookies in older browsers, unless you set the credentials init option.
@@ -14,3 +16,21 @@
         };
       });
     }
+    if (gl.startup_graphql_calls && window.fetch) {
+      const url = `#{api_graphql_url}`
+
+      const opts = {
+        method: "POST",
+        headers: { "Content-Type": "application/json", 'X-CSRF-Token': "#{form_authenticity_token}" },
+      };
+
+      gl.startup_graphql_calls = gl.startup_graphql_calls.map(call => ({
+        operationName: call.query.match(/^query (.+)\(/)[1],
+        fetchCall: fetch(url, {
+          ...opts,
+          credentials: 'same-origin',
+          body: JSON.stringify(call)
+        })
+      }))
+    }
+

app/views/projects/tree/show.html.haml

+- current_route_path = request.fullpath.match(/-\/tree\/[^\/]+\/(.+$)/).to_a[1]
+- add_page_startup_graphql_call('repository/queries/path_last_commit', { projectPath: @project.full_path, ref: current_ref, currentRoutePath: current_route_path })
 - breadcrumb_title _("Repository")
 - @content_class = "limit-container-width" unless fluid_layout
 

spec/helpers/startupjs_helper_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe StartupjsHelper do
+  describe '#page_startup_graphql_calls' do
+    let(:query_location) { 'repository/queries/path_last_commit' }
+    let(:query_content) do
+      File.read(File.join(Rails.root, 'app/assets/javascripts', "#{query_location}.query.graphql"))
+    end
+
+    it 'returns an array containing GraphQL Page Startup Calls' do
+      helper.add_page_startup_graphql_call(query_location, { ref: 'foo' })
+
+      startup_graphql_calls = helper.page_startup_graphql_calls
+
+      expect(startup_graphql_calls).to include({ query: query_content, variables: { ref: 'foo' } })
+    end
+  end
+end