Add Omnibot.Config documentation

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

lib/config.ex

@@ -1,4 +1,57 @@
 defmodule Omnibot.Config do
+  @moduledoc """
+  The full configuration for an instance of Omnibot.
+
+  This configuration structure contains both the IRC server connection information, along with all
+  plugins and their configuration.
+
+  ## Configuration keys
+  
+    - server: the IRC server to connect to. **(required)**
+    - nick: the IRC nickname to use for the bot. **(optional, default "omnibot")**
+    - user: the IRC username to use for the bot. **(optional, default "omnibot")**
+    - real: the IRC realname to use for the bot. **(optional, default "omnibot")**
+    - port: the port to connect to the server on. **(optional, default 6667)**
+    - ssl: whether to use SSL or not. Note that IRC usually uses port 6697 for
+           SSL. **(optional, default false)**
+    - plugins: a list of plugins to load and their configuration. **(optional, default [])**
+    - plugin_paths: a list of locations to look for additional plugins. **(optional, default [])**
+
+  ## Plugins configuration
+  
+  Inside the `plugins` key listed above, a list of plugins is expected. Plugins are either a single
+  atom, or a tuple of the plugin and a keyword list of configuration.
+
+  ### Plugin channels
+  
+  All plugins have a `channels` configuration value, determining which channels this plugin is
+  active in. This value may also be set to the atom value `:all`, which indicates that it is active
+  on all channels.
+
+  At least one plugin in the configuration list must contain a list of channels, so that the bot
+  knows which channels to join.
+
+  ## Example configuration
+  
+  iex> %Omnibot.Config {
+  ...>   nick: "omnibot_testing",
+  ...>   server: "irc.bonerjamz.us",
+  ...>   port: 6667,
+  ...>   ssl: false,
+  ...>   plugins: [
+  ...>     {Omnibot.Contrib.OnConnect, commands: [
+  ...>       ["privmsg", "nickserv", "register", "password123", "omnibot@omni.bot"],
+  ...>       ["privmsg", "nickserv", "identify", "password123"]
+  ...>     ]},
+  ...>     {Omnibot.Contrib.Linkbot, channels: :all},
+  ...>     {Omnibot.Contrib.Fortune, channels: :all},
+  ...>     {Omnibot.Contrib.Wordbot, channels: ["#idleville"], ignore: ["username"]},
+  ...>   ],
+  ...>   plugin_paths: [{"plugins", recurse: true}]
+  ...> }
+
+  """
+
   alias Omnibot.Irc.Msg
 
   @enforce_keys [:server]
@@ -13,8 +66,24 @@ defmodule Omnibot.Config do
     plugin_paths: []
   ]
 
-  @doc ~S"""
+  @doc """
   Gets all channels that the bot should join via its plugins.
+
+  ## Parameters
+
+      - cfg: the configuration value to operate on.
+
+  ## Examples
+
+  iex> cfg = %Omnibot.Config {
+  ...>     server: "irc.example.com",
+  ...>     plugins: [
+  ...>       {ExamplePlugin, channels: ["#omnibot", "#example"]},
+  ...>       {OtherPlugin, channels: ["#example"]}
+  ...>     ]
+  ...> }
+  iex> Omnibot.Config.all_channels(cfg)
+  ["#example", "#omnibot"]
   """
   def all_channels(cfg) do
     Enum.flat_map(cfg.plugins, fn
@@ -25,6 +94,19 @@ defmodule Omnibot.Config do
       |> MapSet.to_list()
   end
 
+  @doc """
+  Creates an `Omnibot.Irc.Msg.Prefix` from this configuration to be sent to a server.
+
+  ## Parameters
+
+      - cfg: the configuration value to operate on.
+
+  ## Examples
+
+  iex> cfg = %Omnibot.Config { server: "irc.example.com" }
+  iex> Omnibot.Config.msg_prefix(cfg)
+  %Omnibot.Irc.Msg.Prefix {:nick => "omnibot", :user => "omnibot", :host => nil}
+  """
   def msg_prefix(cfg) do
     %Msg.Prefix {
       nick: cfg.nick,
@@ -32,9 +114,25 @@ defmodule Omnibot.Config do
     }
   end
 
-  @doc ~S"""
+  @doc """
   Make a new message with the given command and parameters using the given
   configuration to build the prefix.
+
+  ## Parameters
+
+      - cfg: the configuration value to operate on.
+      - command: the IRC command to send
+      - params: a list of parameters to pass to the IRC command.
+
+  ## Examples
+
+  iex> cfg = %Omnibot.Config { server: "irc.example.com" }
+  iex> Omnibot.Config.msg(cfg, "PRIVMSG", ["#testing", "this is a test message"])
+  %Omnibot.Irc.Msg{
+    prefix: %Omnibot.Irc.Msg.Prefix {:nick => "omnibot", :user => "omnibot", :host => nil},
+    command: "PRIVMSG",
+    params: ["#testing", "this is a test message"],
+  }
   """
   def msg(cfg, command, params \\ []) do
     %Msg {