ci(aio): add initial implementation for aio-builds setup

aio/aio-builds-setup/dockerbuild/scripts-js/lib/common/github-pull-requests.ts

@@ -0,0 +1,51 @@
+// Imports
+import {GithubApi} from './github-api';
+
+// Interfaces - Types
+interface PullRequest  {
+  number: number;
+}
+
+export type PullRequestState = 'all' | 'closed' | 'open';
+
+// Classes
+export class GithubPullRequests extends GithubApi {
+  // Methods - Public
+  public addComment(pr: number, body: string): Promise<void> {
+    if (!(pr > 0)) {
+      throw new Error(`Invalid PR number: ${pr}`);
+    } else if (!body) {
+      throw new Error(`Invalid or empty comment body: ${body}`);
+    }
+
+    return this.post<void>(`/repos/${this.repoSlug}/issues/${pr}/comments`, null, {body});
+  }
+
+  public fetchAll(state: PullRequestState = 'all'): Promise<PullRequest[]> {
+    process.stdout.write(`Fetching ${state} pull requests...`);
+    return this.fetchUntilDone(state, 0);
+  }
+
+  // Methods - Protected
+  protected fetchUntilDone(state: PullRequestState, currentPage: number): Promise<PullRequest[]> {
+    process.stdout.write('.');
+
+    const perPage = 100;
+    const pathname = `/repos/${this.repoSlug}/pulls`;
+    const params = {
+      page: currentPage,
+      per_page: perPage,
+      state,
+    };
+
+    return this.get<PullRequest[]>(pathname, params).then(pullRequests => {
+      if (pullRequests.length < perPage) {
+        console.log('done');
+        return pullRequests;
+      }
+
+      return this.fetchUntilDone(state, currentPage + 1).
+        then(morePullRequests => [...pullRequests, ...morePullRequests]);
+    });
+  }
+}