chore(dashboard): http function to list pull requests with conflicts

tools/dashboard/functions/functions.ts

@@ -1 +1,2 @@
 export {payloadGithubStatus} from './payload-github-status';
+export {pullRequestsWithConflicts} from './pull-requests-with-conflicts';

tools/dashboard/functions/github/github-api.ts

@@ -0,0 +1,22 @@
+import {GraphQLClient} from 'graphql-request';
+import {config} from 'firebase-functions';
+import * as GithubApi from 'github';
+
+/** API token for the Github repository. Required to set the github status on commits and PRs. */
+const githubAccessToken = config().secret.github;
+
+/** API Endpoint for the Github API v4 using GraphQL. */
+const githubApiV4Endpoint = 'https://api.github.com/graphql';
+
+/** Export the GitHub V3 API instance that is authenticated. */
+export const githubApiV3 = new GithubApi();
+
+/** Export the GraphQL client that can be used to query the Github API v4. */
+export const githubApiV4 = new GraphQLClient(githubApiV4Endpoint, {
+  headers: {
+    Authorization: `Bearer ${githubAccessToken}`,
+  }
+});
+
+// Authenticate the Github API package with the user token.
+githubApiV3.authenticate({type: 'token', token: githubAccessToken});

tools/dashboard/functions/github/github-graphql-queries.ts

@@ -0,0 +1,43 @@
+import {githubApiV4} from './github-api';
+
+/** GraphQL query that finds all Pull Requests and their mergeable state. */
+const getOpenPullRequestsWithMergeableStateQuery = `
+ query getOpenPullRequestsWithMergeableState($lastCursor: String) {
+   repository(owner: "angular", name: "material2") {
+     pullRequests(states: OPEN, first: 100, after: $lastCursor) {
+       pageInfo {
+         hasNextPage,
+         endCursor
+       }
+       nodes {
+         number,
+         mergeable
+       }
+     }
+   }
+ }`;
+
+/** Pull Request node that will be returned by the Github V4 API. */
+export interface PullRequestWithMergeableState {
+  number: number;
+  mergeable: string;
+}
+
+/** Queries the GitHub API to find all open pull requests and their mergeable state. */
+export async function getOpenPullRequestsWithMergeableState()
+    : Promise<PullRequestWithMergeableState[]> {
+  const nodes: PullRequestWithMergeableState[] = [];
+  let lastData: any|null = null;
+
+  while (!lastData || lastData.repository.pullRequests.pageInfo.hasNextPage) {
+    lastData = await githubApiV4.request(getOpenPullRequestsWithMergeableStateQuery, {
+      lastCursor: lastData && lastData.repository.pullRequests.pageInfo.endCursor
+    });
+
+    nodes.push(...lastData.repository.pullRequests.nodes);
+  }
+
+  return nodes;
+}
+
+

tools/dashboard/functions/github/github-status.ts

@@ -1,10 +1,4 @@
-import {config} from 'firebase-functions';
-
-const request = require('request');
-const {version, name} = require('../package.json');
-
-/** API token for the Github repository. Required to set the github status on commits and PRs. */
-const repoToken = config().secret.github;
+import {githubApiV3} from './github-api';
 
 /** Data that must be specified to set a Github PR status. */
 export type GithubStatusData = {
@@ -18,25 +12,13 @@ export type GithubStatusData = {
 export function setGithubStatus(commitSHA: string, data: GithubStatusData) {
   const state = data.result ? 'success' : 'failure';
 
-  const requestData = {
+  return githubApiV3.repos.createStatus({
+    owner: 'angular',
+    repo: 'material2',
+    sha: commitSHA,
     state: state,
     target_url: data.url,
+    description: data.description,
     context: data.name,
-    description: data.description
-  };
-
-  const headers = {
-    'Authorization': `token ${repoToken}`,
-    'User-Agent': `${name}/${version}`
-  };
-
-  return new Promise((resolve, reject) => {
-    request({
-      url: `https://api.github.com/repos/angular/material2/statuses/${commitSHA}`,
-      method: 'POST',
-      body: requestData,
-      headers: headers,
-      json: true
-    }, (error: any, response: any) => error ? reject(error) : resolve(response.statusCode));
   });
 }

tools/dashboard/functions/package.json

@@ -6,6 +6,8 @@
     "@types/jsonwebtoken": "^7.2.1",
     "firebase-admin": "~4.2.1",
     "firebase-functions": "^0.5.7",
+    "github": "^10.0.0",
+    "graphql-request": "^1.3.4",
     "jsonwebtoken": "^7.4.1",
     "request": "^2.81.0",
     "ts-node": "^3.0.6",

tools/dashboard/functions/pull-requests-with-conflicts.ts

@@ -0,0 +1,13 @@
+import {https} from 'firebase-functions';
+import {getOpenPullRequestsWithMergeableState} from './github/github-graphql-queries';
+
+/**
+ * Firebase HTTP trigger that responds with a list of Pull Requests that have merge conflicts.
+ */
+export const pullRequestsWithConflicts = https.onRequest(async (_request, response) => {
+  const pullRequests = (await getOpenPullRequestsWithMergeableState())
+    .filter(pullRequest => pullRequest.mergeable === 'CONFLICTING');
+
+  response.status(200).json(pullRequests);
+});
+