Implement Message (single-enum)

Add relevant section of Protocol spec to message mod and variant docs

Depend on serde{,_json}. Dev-depend on rand

Credit Katt in Cargo.toml

server/Cargo.toml

@@ -6,4 +6,12 @@ readme = "README.md"
 keywords = ["game", "lounge", "server"]
 license = "MIT"
 version = "0.1.0"
-authors = ["nabijaczleweli <[email protected]>"]
+authors = ["nabijaczleweli <[email protected]>",
+           "Cat Plus Plus <[email protected]>"]
+
+[dependencies]
+serde = "0.7"
+serde_json = "0.7"
+
+[dev-dependencies]
+rand = "0.3"

server/src/main.rs

@@ -10,6 +10,11 @@
     unused_results,
 )]
 
+extern crate serde_json;
+extern crate serde;
+
+pub mod message;
+
 use std::env;
 use std::vec::Vec;
 

server/src/message/err.rs

@@ -0,0 +1,15 @@
+use serde_json;
+
+#[derive(Debug)]
+pub enum MessageError {
+    JsonError(serde_json::Error),
+    PropertyMissing(String),
+    ExtraneousProperty(String),
+    BadType(String),
+}
+
+impl From<serde_json::Error> for MessageError {
+    fn from(sje: serde_json::Error) -> Self {
+        MessageError::JsonError(sje)
+    }
+}