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README.md

Slack Invite

Simple endpoint for inviting yourself to any Slack group. Built with Sinatra. Great for open & free groups.

Example: http://rubybrigade.my/slack_invite/

How to set it up

Simplest (and free-est) way is to deploy this on Heroku's free dynos.

Step 1: Clone this repo

git clone git@github.com:klxrb/slack-invite.git
cd slack-invite

Step 2: Setup Heroku

Setup and configure Heroku Toolbelt if not already.

heroku apps:create
heroku config:set SLACK_CHANNEL=<your-slack-channel-name>
heroku config:set SLACK_TEAM_NAME=<your-slack-team-name>
heroku config:set SLACK_TEAM_AUTH_TOKEN=<your-slack-team-auth-token>

How to get your Slack Team Auth Token

  1. As Team Admin, go to the Slack Web API Documentation and click "Create Token" and it should generate a API Token. This is the value for SLACK_TEAM_AUTH_TOKEN.

  2. Then go to the channel.list API Tester. Select your Slack team for the token field, click on "Test Method".

You should see something like this in the response field :-

{
  "ok": true,
  "channels": [
      {
          "id": "THIS-IS-YOUR-CHANNEL-ID",
          "name": "general",
          "is_channel": true,

Choose the channel ID you want the members to be invited into by default. That's the value for SLACK_CHANNEL.

  1. SLACK_TEAM_NAME is just name name of your Slack team, you can get this from your team URL (e.g. http://team-name.slack.com)

Step 3: Deploy

Deploy the Heroku app

git push heroku master

Go to https://your-app-name.herokuapp.com/invite.json, you should see a JSON with invalid_email error. You can try to invite by simply doing https://your-app-name.herokuapp.com/invite.json?email=invite-this-member@email.com.

Step 4: Create the form

The endpoint only handles JSON requests, so you might want to use some AJAX to handle your form submissions.

<form id="slack_invite">
  Email: <input type="email" name="email_invite" id="email_invite" placeholder="please@invite.me">
  <button id="submit_button" type="submit">Submit</button>
</form>

<script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
<script>
$(function(){
  $('#slack_invite').submit(function(){
      $.ajax({
        url: 'https://your-app-name.herokuapp.com/invite.json',
        dataType: 'jsonp',
        data: {
          email: $('#email_invite').val()
        },
        success: function(data){
          if(data.ok){
            alert("You're Invited !!!");
          }else{
            alert("Something went wrong :(");
          }
        }
      })
  })
})
</script>

Put this code on your website and you're good to go :)

You can look at the RubyMY invite page for example http://rubybrigade.my/slack_invite/

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