Github Input Integration script for https://Rocket.Chat originally found https://github.com/xenithorb/Rocket.Chat.Docs/blob/master/4.%20Administrator%20Guides/Integrations/GitHub.md

rocketchat_github_integration_in.js

/* exported Script */

// Begin embedded images
const gh_cmit_svg = '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';
const gh_pr_svg = 'PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIGFyaWEtaGlkZGVuPSJ0cnVlIiBjbGFzcz0ib2N0aWNvbiBvY3RpY29uLWdpdC1wdWxsLXJlcXVlc3QiIGhlaWdodD0iMTYiIHZlcnNpb249IjEuMSIgdmlld0JveD0iMCAwIDEyIDE2IiB3aWR0aD0iMTIiPjxwYXRoIGQ9Ik0xMSAxMS4yOFY1Yy0uMDMtLjc4LS4zNC0xLjQ3LS45NC0yLjA2QzkuNDYgMi4zNSA4Ljc4IDIuMDMgOCAySDdWMEw0IDNsMyAzVjRoMWMuMjcuMDIuNDguMTEuNjkuMzEuMjEuMi4zLjQyLjMxLjY5djYuMjhBMS45OTMgMS45OTMgMCAwIDAgMTAgMTVhMS45OTMgMS45OTMgMCAwIDAgMS0zLjcyem0tMSAyLjkyYy0uNjYgMC0xLjItLjU1LTEuMi0xLjIgMC0uNjUuNTUtMS4yIDEuMi0xLjIuNjUgMCAxLjIuNTUgMS4yIDEuMiAwIC42NS0uNTUgMS4yLTEuMiAxLjJ6TTQgM2MwLTEuMTEtLjg5LTItMi0yYTEuOTkzIDEuOTkzIDAgMCAwLTEgMy43MnY2LjU2QTEuOTkzIDEuOTkzIDAgMCAwIDIgMTVhMS45OTMgMS45OTMgMCAwIDAgMS0zLjcyVjQuNzJjLjU5LS4zNCAxLS45OCAxLTEuNzJ6bS0uOCAxMGMwIC42Ni0uNTUgMS4yLTEuMiAxLjItLjY1IDAtMS4yLS41NS0xLjItMS4yIDAtLjY1LjU1LTEuMiAxLjItMS4yLjY1IDAgMS4yLjU1IDEuMiAxLjJ6TTIgNC4yQzEuMzQgNC4yLjggMy42NS44IDNjMC0uNjUuNTUtMS4yIDEuMi0xLjIuNjUgMCAxLjIuNTUgMS4yIDEuMiAwIC42NS0uNTUgMS4yLTEuMiAxLjJ6Ij48L3BhdGg+PC9zdmc+';
const svg_b64_pre = 'data:image/svg+xml;base64,';
// end embedded images

const getLabelsField = (labels) => {
  let labelsArray = [];
  labels.forEach(function(label) {
    labelsArray.push(label.name);
  });
  labelsArray = labelsArray.join(', ');
  return {
    title: 'Labels',
    value: labelsArray,
    short: labelsArray.length <= 40
  };
};

const githubEvents = {
  ping(request) {
    return {
      content: {
        text: ':thumbsup: ' + request.content.zen
      }
    };
  },

  issues(request) {
    const user = request.content.sender;
    const attachment = {
      author_icon: svg_b64_pre + gh_pr_svg,
      author_name: '#' + request.content.issue.number + ' - ' + request.content.issue.title,
      author_link: request.content.issue.html_url,
      fields: []
    };

    if (request.content.issue.labels) {
      attachment.fields.push(getLabelsField(request.content.issue.labels));
    }

    if (request.content.issue.assignee) {
      attachment.fields.push({
        title: 'Assignee',
        value: request.content.issue.assignee.login,
        short: true
      });
    }

    const actions = {
      'assigned': ':inbox_tray:',
      'unassigned': ':outbox_tray:',
      'opened': ':triangular_flag_on_post:',
      'closed': ':white_check_mark:',
      'reopened': ':triangular_flag_on_post:',
      'labeled': ':label:',
      'unlabeled': ':label:',
      'edited': ':pencil:'
    };

    const text = actions[request.content.action] + ' issue';

    return {
      content: {
        icon_url: user.avatar_url,
        alias: user.login,
        text: text,
        attachments: [attachment]
      }
    };
  },

  issue_comment(request) {
    const user = request.content.comment.user;
    var attachment = {
      author_icon: svg_b64_pre + gh_pr_svg,
      author_name: '#' + request.content.issue.number + ' - ' + request.content.issue.title,
      author_link: request.content.comment.html_url,
      fields: []
    };

    if (request.content.issue.labels) {
      attachment.fields.push(getLabelsField(request.content.issue.labels));
    }

    if (request.content.issue.assignee) {
      attachment.fields.push({
        title: 'Assignee',
        value: request.content.issue.assignee.login,
        short: true
      });
    }

    const text = ':speech_balloon: ' + request.content.comment.body;

    return {
      content: {
        icon_url: user.avatar_url,
        alias: user.login,
        text: text,
        attachments: [attachment]
      }
    };
  },

  pull_request(request) {
    const user = request.content.sender;
    const attachment = {
      author_icon: svg_b64_pre + gh_pr_svg,
      author_name: '#' + request.content.pull_request.number + ' - ' + request.content.pull_request.title,
      author_link: request.content.pull_request.html_url
    };

    let text = 'Pull request';
    switch (request.content.action) {
      case 'assigned':
        text += ' assigned to: ' + request.content.assignee.login;
        break;
      case 'unassigned':
        text += ' unassigned of ' + request.content.assignee.login;
        break;
      case 'opened':
        text += ' opened';
        break;
      case 'closed':
        if (request.content.pull_request.merged) {
          text += ' merged';
        } else {
          text += ' closed';
        }
        break;
      case 'reopened':
        text += ' reopened';
        break;
      case 'labeled':
        text += ' added label: "' + request.content.label.name + '" ';
        break;
      case 'unlabeled':
        text += ' removed label: "' + request.content.label.name + '" ';
        break;
      case 'synchronize':
        text += ' synchronized';
    }

    return {
      content: {
        icon_url: user.avatar_url,
        alias: user.login,
        text: text,
        attachments: [attachment]
      }
    };
  },

  //// Github push event
  push(request) {
    var commits = request.content.commits;
    var multi_commit = ""
    var is_short = true;
    var changeset = 'Changeset';
    if ( commits.length > 1 ) {
      var multi_commit = " [Multiple Commits]";
      var is_short = false;
      var changeset = changeset + 's';
      var output = [];
    }
    const user = request.content.sender;
    const attachment = {
	  author_icon: svg_b64_pre + gh_cmit_svg,
      author_name: "Message: " + request.content.head_commit.message + multi_commit,
      author_link: request.content.compare,
      fields: []
    };

    if (request.content.repository.full_name) {
      attachment.fields.push({
        title: 'Repo',
        value: "["+request.content.repository.full_name+"]("+request.content.repository.url+")",
        short: is_short
      });
    }

    for (var i = 0; i < commits.length; i++) {
      var commit = commits[i];
      var shortID = commit.id.substring(0,7);
      if ( commits.length > 1 ) {
        a = '[' + shortID + '](' + commit.url + ') - ' + commit.message;
        output.push( a );
      } else {
        var output = "["+shortID+"]("+commit.url+")";
      }
    }
    if (commits.length > 1) {
      attachment.fields.push({
        title: changeset,
        value: output.reverse().join('<br />'),
        short: is_short
      });
    } else {
      attachment.fields.push({
        title: changeset,
        value: output,
        short: is_short
      });
    }

    const text = ':ballot_box_with_check: Pushed to ' + "["+request.content.ref.split('/').pop()+"]";

    return {
      content: {
        icon_url: user.avatar_url,
        alias: user.login,
        text: text,
        attachments: [attachment]
      }
	};
  },  // End Github Push
};

class Script {
  process_incoming_request({ request }) {
    const header = request.headers['x-github-event'];
    if (githubEvents[header]) {
      return githubEvents[header](request);
    }

    return {
      error: {
        success: false,
        message: 'Unsupported method'
      }
    };
  }
}