Phamello is an example of a Phoenix + Amazon S3 + Trello integration. After having uploaded an image, this will be pushed to S3, then used to publish a card on Trello. A demo is currently available at https://gentle-wildwood-53699.herokuapp.com/

Highlights:

• Authenticate through Github
• Persist the images both on the application's host and on S3. Images on the application's host won't be removed after being pushed to S3 (although this can be easily tweaked)
• Uploading to S3 and publishing on Trello are both handled through asyncronous tasks, and orchestrated through a GenServer
• Tasks will notify the browser after completion (just in case you see the logotype buzzing)

The application is setup to be easily deployable (in this case, to Heroku). For that reason, most of the configuration settings are setup through a .env file. Checkout .env.example for a complete list of required settings.

• Fill all of the required external credentials
• For SECRET_KEY_BASE and GUARDIAN_SECRET_KEY vars, you can easily generate a value with mix phoenix.gen.secret
• Create a folder for the local storage of uploaded files, being sure it corresponds to IMAGE_STORAGE_FOLDER

After creating your .env file, remember to source it before running any iex or mix related command.

To start your Phoenix app:

• Install dependencies with mix deps.get
• Create and migrate your database with mix ecto.create && mix ecto.migrate
• Install Node.js dependencies with npm install
• Start Phoenix endpoint with mix phoenix.server (rember to source your .env file!)

Now you can visit localhost:4000 from your browser.

A deployable version is available in the branch heroku-deploy. Before deploying yourself, remember to change your app's Endpoint configuration in config/prod.exs. This should match your Heroku application's host:

url: [scheme: "https", host: "my-application-name.herokuapp.com", port: 443],