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slack-meme

★ 329 Open GitHub ↗

A Meme Bot for Slack.

// repository documentation

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# slack-meme
Post memes to any of your Slack channels with a slash command.

## Usage

### Built-in Templates

`/meme success; we have; a meme bot;`

`/meme templates` shows you the available built-in templates:

### Custom Templates
Use your own image by passing its URL as the template:

`/meme https://nicolewhite.github.io/images/me.jpg hello; my name is nicole;`

**NOTE:** There's no semicolon at the end of the URL when using a custom template

### Preview

Hone your meme skills privately by practicing in the slackbot channel.

### How It Works

The memes are posted under a bot in the same channel where `/meme` was called, where the bot's picture and username are replaced with your own. Because a bot is posting the meme and not you, you will not be able to delete memes once they are sent.

## Setup

### Slack App

1. Create a new Slack App at the [App creation page](https://api.slack.com/apps/new).

![Slack App creation](https://raw.githubusercontent.com/nicolewhite/slack-meme/master/support/slack-app-creation.png)

Name your app with something easy to recognize, for example "Meme". If you are logged into more than one workspace, select one of them as the Development Slack Workspace.

2. Find your verification token and store it in an environment variable. On the Basic Information page, scroll down to find the "App Credentials" section.

![App credentails](https://raw.githubusercontent.com/nicolewhite/slack-meme/master/support/slack-app-credentials.png)

Copy the value in the "Verification Token" field, and store this value in the environment variable named `SLACK_VERIFICATION_TOKEN`. If you are going to run this app on the command line, its easy to do in your shell:

```
   $ export SLACK_VERIFICATION_TOKEN="replace with your token"
   ```

3. Add the necessary scopes to your app. On the OAuth & Permissions page, scroll down to find the "Scopes" section. Input `users:read` into the selection box. Confirm that the scope is listed in the table below, and click "Save Changes".

4. Create an Incoming Webhook and store its URL in an environment variable. On the Incoming Webhooks page (under Features), slide the toggle to activate incoming webhooks. Click the button to add a new webhook.

![Enable incoming webhooks](https://raw.githubusercontent.com/nicolewhite/slack-meme/master/support/slack-create-incoming-webhook.png)

You'll be taken to a page to install your app in your workspace with the permissions required for the incoming webhook. Select a channel (it doesn't matter which one) and click Authorize.

![Authorize installation](https://raw.githubusercontent.com/nicolewhite/slack-meme/master/support/slack-auth-installation.png)

When you return to the Incoming Webhooks page, you'll find a new item in the table. Copy the Webhook URL and store it in another environment variable called `SLACK_WEBHOOK_URL`.

5. Find your API token and store it in an enviornment variable. On the Install App page you'll find an Oauth Access Token. This value is used as your API token. Copy it and store it in another environment variable called `SLACK_API_TOKEN`. **Leave the Slack App configuration open, you need to finish by adding the slash command below**.

### Deploy to Heroku

[Heroku](https://www.heroku.com/home) is the simplest platform to deploy your application onto. If you have your own hosting you can move onto the next section. If you're developing and running the application locally, at the very least you'll need a public URL where Slack can send requests and [ngrok](https://ngrok.com/) can be very useful for that.

If you don't aleady have an account with Heroku, sign up for free, then click the button:

[![Deploy](https://www.herokucdn.com/deploy/button.png)](https://heroku.com/deploy)

Paste your `SLACK_API_TOKEN`, `SLACK_WEBHOOK_URL`, and `SLACK_VERIFICATION_TOKEN` values into the appropriate config variables.

![Configure Heroku app](https://raw.githubusercontent.com/nicolewhite/slack-meme/master/support/heroku-config-app.png)

Click **Deploy app**. Once finished, the **App name** field will now be populated if you didn't choose a name upfront.

### Finish Slash Command Config

Go to the Slash Command configuration page (under Features). Create a new command and fill in the details.

![Create slash command](https://raw.githubusercontent.com/nicolewhite/slack-meme/master/support/slack-slash-command-details.png)

The Request URL is the root URL for where you deployed the application. If you deployed to Heroku, the is `https://you-app-name.herokuapp.com` (replace with your own app name).

Save the Slash Command integration.

## Update Your Heroku Deployment

To update your deployment with changes from this repository, visit your app's homepage on Heroku and navigate to the section on deploying with Heroku git at https://dashboard.heroku.com/apps/your-app-name/deploy/heroku-git, replacing `your-app-name` with the name of your app. Follow the instructions there to get the Heroku toolbelt set up. Then:

```
$ heroku login
$ heroku git:clone -a your-app-name
$ cd your-app-name
```

Replace `your-app-name` with the name of your app. Once you have this set up, you can update your app with changes from this repository with the following:

```
$ git remote add slack-meme https://github.com/nicolewhite/slack-meme
$ git pull --rebase slack-meme master
$ git push heroku master
```

## Deploying with Docker

We've already got a `Dockerfile` ready to go. The quickest path would be to download this repo, replace the environment
variable values in `docker-compose.yml`, and run `docker-compose up`.

## Development

In order to run this project locally for development, you should first install [Pipenv](https://docs.pipenv.org/).
Once you have the `pipenv` command line tool available, you don't need to worry about setting up in a virtualenv or
managing the dependencies yourself.

Create a `.env` file in the top level directory of this project. Pipenv will automatically load the values defined into
your environment for you. Use the following template and fill in the values with the ones you're using.

```
SLACK_WEBHOOK_URL=replace_me
SLACK_API_TOKEN=replace_me
SLACK_VERIFICATION_TOKEN=replace_me
```

Next, use Pipenv to install the project dependencies

```
$ pipenv install
```

Lastly, launch the project with the following command. Notice that we've passed the `--log-level=debug` flag, which
will output useful information for development purposes. This shouldn't be used in production.

```
$ pipenv run gunicorn -b 0.0.0.0:8080 wsgi --log-level=debug
```

## Credits

This uses [memegen](https://github.com/jacebrowning/memegen). Thanks memegen!

slack-meme

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