async onPRLabeled()

in functions/src/plugins/merge.ts [51:95]
37 lines of code
8 McCabe index (conditional complexity)

  async onPRLabeled(context: Context): Promise<void> {
    const newLabel = context.payload.label.name;
    let pr: Github.PullRequestsGetResponse = context.payload.pull_request;
    const config = await this.getConfig(context);
    const {owner, repo} = context.repo();
    pr = await this.updateDbPR(context.github, owner, repo, pr.number, context.payload.repository.id, pr).catch(err => {
      throw err;
    });

    let updateStatus = false;
    let statuses: GithubGQL.StatusContext[];

    if(newLabel === config.mergeLabel) {
      this.logDebug({context}, `Checking merge label`);

      statuses = await this.getStatuses(context, pr.number, config);
      const checks = await this.getChecksStatus(context, pr, config, pr.labels, statuses);

      if(checks.failure.length > 0) {
        const failures = checks.failure.map(check => `&nbsp;&nbsp;&nbsp;&nbsp;![failure](https://raw.githubusercontent.com/angular/github-robot/master/assets/failing.png) ${check}`);
        const pendings = checks.pending.map(check => `&nbsp;&nbsp;&nbsp;&nbsp;![pending](https://raw.githubusercontent.com/angular/github-robot/master/assets/pending.png) ${check}`);
        const reasons = `${failures.concat(pendings).join('\n')}`;

        let body = config.mergeRemovedComment;
        if(body) {
          body = body.replace("{{MERGE_LABEL}}", config.mergeLabel).replace("{{PLACEHOLDER}}", reasons);
          addComment(context.github, owner, repo, pr.number, body).catch(err => {
            throw err;
          });
        }
      }
    } else if(config.mergeLinkedLabels && config.mergeLinkedLabels.includes(newLabel) && !getLabelsNames(pr.labels).includes(config.mergeLabel)) {
      // Add the merge label when we add a linked label
      addLabels(context.github, owner, repo, pr.number, [config.mergeLabel])
        .catch(); // If it fails it's because we're trying to add a label that already exists
    }

    if(this.matchLabel(newLabel, pr.labels, config)) {
      updateStatus = true;
    }

    this.updateStatus(context, config, updateStatus, pr.labels, statuses).catch(err => {
      throw err;
    });
  }