Re-organize the client module

Re-organize the client module, creating a `gateway` submodule, and
splitting the connection into separate files in it.

The connection was a conglomeration of a number of purposes, most of
which are actually used elsewhere in the library and/or exposed to the
user. Thus, it makes sense to separate each item in a gateway-specific
module.

By splitting the client module further, this is a re-organization for
preliminary RPC support WRT the Client.

Additionally, rename the Connection struct to a Shard. The Connection
itself was not the actual connection, and was a higher-level interface
to the real connection logic. A Shard is a more accurate representation
of what it actually is.

2 files changed, 11 insertions, 11 deletions

diff --git a/examples/02_transparent_guild_sharding.rs b/examples/02_transparent_guild_sharding.rs
index d257373..64a5a6f 100644
--- a/examples/02_transparent_guild_sharding.rs
+++ b/examples/02_transparent_guild_sharding.rs
@@ -30,9 +30,9 @@ fn main() {
     client.on_message(|context, message| {
         if message.content == "!ping" {
             {
-                let connection = context.connection.lock().unwrap();
+                let shard = context.shard.lock().unwrap();
 
-                if let Some(shard_info) = connection.shard_info() {
+                if let Some(shard_info) = shard.shard_info() {
                     println!("Shard {}", shard_info[0]);
                 }
             }
@@ -46,7 +46,7 @@ fn main() {
     });
 
     // The total number of shards to use. The "current shard number" of a
-    // connection - that is, the shard it is assigned to - is indexed at 0,
+    // shard - that is, the shard it is assigned to - is indexed at 0,
     // while the total shard count is indexed at 1.
     //
     // This means if you have 5 shards, your total shard count will be 5, while
diff --git a/examples/07_voice.rs b/examples/07_voice.rs
index d570abf..3250512 100644
--- a/examples/07_voice.rs
+++ b/examples/07_voice.rs
@@ -52,9 +52,9 @@ fn deafen(context: Context, message: Message, _args: Vec<String>) {
         },
     };
 
-    let mut connection = context.connection.lock().unwrap();
+    let mut shard = context.shard.lock().unwrap();
 
-    let handler = match connection.manager.get(guild_id) {
+    let handler = match shard.manager.get(guild_id) {
         Some(handler) => handler,
         None => {
             let _ = message.reply("Not in a voice channel");
@@ -104,8 +104,8 @@ fn join(context: Context, message: Message, args: Vec<String>) {
         },
     };
 
-    let mut connection = context.connection.lock().unwrap();
-    let ref mut manager = connection.manager;
+    let mut shard = context.shard.lock().unwrap();
+    let ref mut manager = shard.manager;
 
     let _handler = manager.join(Some(guild_id), connect_to);
 
@@ -128,13 +128,13 @@ fn leave(context: Context, message: Message, _args: Vec<String>) {
         },
     };
 
-    let is_connected = match context.connection.lock().unwrap().manager.get(guild_id) {
+    let is_connected = match context.shard.lock().unwrap().manager.get(guild_id) {
         Some(handler) => handler.channel().is_some(),
         None => false,
     };
 
     if is_connected {
-        context.connection.lock().unwrap().manager.remove(guild_id);
+        context.shard.lock().unwrap().manager.remove(guild_id);
 
         let _ = context.say("Left voice channel");
     } else {
@@ -158,9 +158,9 @@ fn mute(context: Context, message: Message, _args: Vec<String>) {
         },
     };
 
-    let mut connection = context.connection.lock().unwrap();
+    let mut shard = context.shard.lock().unwrap();
 
-    let handler = match connection.manager.get(guild_id) {
+    let handler = match shard.manager.get(guild_id) {
         Some(handler) => handler,
         None => {
             let _ = message.reply("Not in a voice channel");