Improve README.md

Author: gustavothecoder

README.md

@@ -1,61 +1,81 @@
 # Pod
 
-TODO: create pod description
+Simple CLI to manage podcasts.
 
 ## Installation
 
-Install the gem and add to the application's Gemfile by executing:
+Pod is a Ruby gem published on RubyGems, so you can install running:
 
-    $ bundle add pod
+```bash
+$ gem install pod
+```
 
-If bundler is not being used to manage dependencies, install the gem by executing:
+## Usage
 
-    $ gem install pod
+### Initialization
 
-## Usage
+```bash
+$ pod init
+```
 
-TODO: Write usage instructions here
+### Adding a podcast
 
-## Development
+```bash
+$ pod add ./path/to/rss.xml
+$ pod add https://podcast.com/feed.xml
+```
 
-After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
+### Listing podcasts
+
+```bash
+$ pod podcasts
+$ pod podcasts --fields=id name
+```
+
+### Listing episodes
+
+```bash
+$ pod episodes PODCAST_ID
+$ pod podcasts PODCAST_ID --fields=id title duration
+$ pod podcasts PODCAST_ID --order-by=duration
+```
+
+### Opening an episode
 
-### TODO List
-- [x] Input interpretation
-     - [x] Create abstraction for `Open3`
-- [x] `pod version/-v/--version` command
-- [ ] `pod init` command
-- [ ] Setup linter
-- [ ] Setup lefthook
-- [ ] Setup CI
+```bash
+$ pod open EPISODE_ID
+$ pod open EPISODE_ID --browser=firefox
+$ pod open EPISODE_ID --archive
+```
 
-### File structure
+### Archiving an episode
 
+```bash
+$ pod archive EPISODE_ID
 ```
-.
-└── lib/
-    ├── pod/
-    │   ├── commands/
-    │   │   ├── init/
-    │   │   │   ├── runner.rb
-    │   │   │   └── output.rb
-    │   │   ├── add/
-    │   │   │   ├── runner.rb
-    │   │   │   └── output.rb
-    │   │   ├── archive/
-    │   │   │   ├── runner.rb
-    │   │   │   └── output.rb
-    │   │   └── ...
-    │   ├── infrastructure/
-    │   │   ├── feed_parser.rb
-    │   │   ├── shell_interface.rb
-    │   │   ├── dto.rb
-    │   │   ├── storage.rb
-    │   │   └── ...
-    │   └── cli.rb
-    └── pod.rb
+
+### Dearchiving an episode
+
+```bash
+$ pod dearchive EPISODE_ID
 ```
 
+### Synchronizing a podcast
+
+```bash
+$ pod sync PODCAST_ID
+```
+
+### Updating the podcast
+
+```bash
+$ pod update PODCAST_ID --feed=https://newfeed.com/feed.xml
+```
+
+## Development
+
+After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
+
 ## Contributing
 
 Bug reports and pull requests are welcome on GitHub at https://github.com/gustavothecoder/pod.