gistfile1.js

/* exported Script
Issue events (create, edit, close, reopen, assign, label, etc)
Issue comment events
Push events (singular and multiple commits)
*/

String.prototype.capitalizeFirstLetter = function() {
    return this.charAt(0).toUpperCase() + this.slice(1);
}

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) {
    if (typeof request.content.repository == "undefined") {
      return {
        content: {
          text: '_' + request.content.organization.description + '_\n' + ':thumbsup: ' + request.content.zen
        }
      };

    } else {
      return {
        content: {
          text: '_' + request.content.repository.full_name + '_\n' + ':thumbsup: ' + request.content.zen
        }
      };
    }
  },
  
  /* member */
  member(request) {
    const user = request.content.sender;

	const action = request.content.action.capitalizeFirstLetter();    

    const text = '_' + request.content.repository.full_name + '_\n' +
                '**[' + action + ' member ​@' + request.content.member.login +
                 "**" + '](' +
                request.content.member.html_url + ')';

    return {
      content: {
	    icon_url: user.avatar_url,
		alias: user.login,
        attachments: [
            {
                text: text,
                fields: []
            }
        ]
      }
    };
  },
  
  /* membership */
  membership(request) {
    const user = request.content.sender;

	const action = request.content.action.capitalizeFirstLetter();    

    const text = '_' + request.content.organization.login + '/' + request.content.team.name + '_\n' +
                '**[' + action + ' member ​@' + request.content.member.login +
                 "**" + '](' +
                request.content.member.html_url + ')\n\nPermission Level: ' + request.content.team.permission;

    return {
      content: {
	    icon_url: user.avatar_url,
		alias: user.login,
        attachments: [
            {
                text: text,
                fields: []
            }
        ]
      }
    };
  },
  
  /* repository */
  repository(request) {
    const user = request.content.sender;

	const action = request.content.action.capitalizeFirstLetter();    

    const text = '_' + request.content.repository.full_name + '_\n' +
                '**[' + action + ' repo ' + request.content.repository.name +
                 "**" + '](' +
                request.content.repository.html_url + ')';

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

  /* NEW OR MODIFY ISSUE */
  /*
  issues(request) {
    const user = request.content.sender;

    if (request.content.action == "opened" || request.content.action == "reopened" || request.content.action == "edited") {
        var body = request.content.issue.body;
    } else if (request.content.action == "labeled") {
        var body = "Current labels: " + getLabelsField(request.content.issue.labels).value;
    } else if (request.content.action == "assigned" || request.content.action == "unassigned") {
        // Note that the issues API only gives you one assignee.
        var body = "Current assignee: " + request.content.issue.assignee.login;
    } else if (request.content.action == "closed") {
        if (request.content.issue.closed_by) {
            var body = "Closed by: " + request.content.issue.closed_by.login;
        } else {
            var body = "Closed.";
        }
    } else {
        return {
          error: {
            success: false,
            message: 'Unsupported issue action'
          }
        };
    }

    const action = request.content.action.capitalizeFirstLetter();    

    const text = '_' + request.content.repository.full_name + '_\n' +
                '**[' + action + ' issue ​#' + request.content.issue.number +
                ' - ' + request.content.issue.title + "**" + '](' +
                request.content.issue.html_url + ')\n\n' +
                body;

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

  /* COMMENT ON EXISTING ISSUE */
  /*
  issue_comment(request) {
    const user = request.content.comment.user;   

    if (request.content.action == "edited") {
        var action = "Edited comment ";
    } else {
        var action = "Comment "
    }

    const text = '_' + request.content.repository.full_name + '_\n' +
                '**[' + action + ' on issue ​#' + request.content.issue.number +
                ' - ' + request.content.issue.title + '](' +
                request.content.comment.html_url + ')**\n\n' +
                request.content.comment.body;

    return {
      content: {
	    icon_url: user.avatar_url,
		alias: user.login,
        attachments: [
            {
                text: text,
                fields: []
            }
        ]
      }
    };
  },
  */
  
  /* Create branch/tag */
  create(request) {
    const user = request.content.sender;

    var text = '**Created new ' + request.content.ref_type + ": ["+request.content.repository.full_name+"]("+request.content.repository.url+"):"
                + request.content.ref.split('/').pop() + "**";
    
    return {
      content: {
	    icon_url: user.avatar_url,
		alias: user.login,
        attachments: [
            {
                text: text,
                fields: []
            }
        ]
      }
    };  
  },
  
  /* Delete branch/tag */
  delete(request) {
    const user = request.content.sender;

    var text = '**Deleted ' + request.content.ref_type + ": ["+request.content.repository.full_name+"]("+request.content.repository.url+"):"
                + request.content.ref.split('/').pop() + "**";
    
    return {
      content: {
	    icon_url: user.avatar_url,
		alias: user.login,
        attachments: [
            {
                text: text,
                fields: []
            }
        ]
      }
    };  
  },

  /* PUSH TO REPO */
  push(request) {
    const user = request.content.sender;
    var commits = request.content.commits;   

    var text = '**Pushed to ' + "["+request.content.repository.full_name+"]("+request.content.repository.url+"):"
                + request.content.ref.split('/').pop() + "**\n\n";

    var output = [];
    if (commits.length == 0 && request.content.head_commit != null) {      
      commits.push(request.content.head_commit);
      text += 'Set tag/branch reference to:' + "\n";
    } else if (commits.length == 0) {      
      text += 'Set tag/branch reference to: ' + request.content.after;
    }

    for (var i = 0; i < commits.length; i++) {
      var commit = commits[i];
      var shortID = commit.id.substring(0,7);
      var a = '[' + shortID + '](' + commit.url + ') - ';
	  var commitMessages = commit.message.split('\n')
	  
	  if (commits.length > 1) {
		a += commitMessages.shift();
	  }
	  else if (commitMessages.length > 5) {
		a += commitMessages.shift();
		a += "...";
	  }
	  else {
		a += commit.message;  
	  }
	  
      output.push( a );
	  
    }

    text += output.reverse().slice(0,4).join('\n');
	
	if (output.length > 4) {
		text += "\n(+" + (output.length - 4) + ' commits)';
	}
	
	text += "\n[Diff/Full Changes]("+request.content.compare+")"

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

  /* NEW PULL REQUEST */
  pull_request(request) {
    const user = request.content.sender;

   if (request.content.action == "opened" || request.content.action == "reopened" /*|| request.content.action == "edited" || request.content.action == "synchronize"*/) {
        var body = request.content.pull_request.body;
    /*} else if (request.content.action == "labeled") {
        var body = "Current labels: " + getLabelsField(request.content.pull_request.labels).value;
    } else if (request.content.action == "assigned" || request.content.action == "unassigned") {
        // Note that the issues API only gives you one assignee.
        var body = "Current assignee: " + request.content.pull_request.assignee.login;*/
    } else if (request.content.action == "closed") {
        if (request.content.pull_request.merged) {
            var body = "Merged by: " + request.content.pull_request.merged_by.login;
        } else {
            var body = "Closed.";
        }
    } else {
        return {
          error: {
            success: false,
            message: 'Unsupported pull request action'
          }
        };
    }

    const action = request.content.action.capitalizeFirstLetter();    

    const text = '_' + request.content.repository.full_name + '_\n' +
                '**[' + action + ' pull request ​#' + request.content.pull_request.number +
                ' - ' + request.content.pull_request.title + "**" + '](' +
                request.content.pull_request.html_url + ')\n\n' +
                body;

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

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'
      }
    };
  }
}