feat: Added support for simple commands like PING, ECHO, GET and SET

- Implemented a simple parsing logic for parsing commmands now
- Created a HashMap that will act as our storage and shared it across
threads using `Arc<Mutex<()>>` magic
- Wrote some macros to make instantiating RESP types eaiser for myself

1 files changed, 11 insertions, 5 deletions

diff --git a/src/main.rs b/src/main.rs
index 7ddd478..a382f15 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,17 +1,21 @@
 #![allow(unused_imports)]
 use std::{
+    collections::HashMap,
     io::{Read, Write},
     net::{TcpListener, TcpStream},
+    sync::{Arc, Mutex},
     thread,
 };
 
 mod resp_commands;
 mod resp_parser;
 
-use resp_commands::RespCommands;
-use resp_parser::parse;
+use resp_commands::RedisCommands;
+use resp_parser::{parse, RespType};
 
-fn handle_client(mut stream: TcpStream) {
+pub type SharedCache = Arc<Mutex<HashMap<String, String>>>;
+
+fn handle_client(mut stream: TcpStream, cache: SharedCache) {
     let mut buffer = [0; 512];
     loop {
         let bytes_read = match stream.read(&mut buffer) {
@@ -21,7 +25,7 @@ fn handle_client(mut stream: TcpStream) {
         };
 
         let parsed_resp = parse(&buffer).unwrap();
-        let response = RespCommands::from(parsed_resp.0).execute();
+        let response = RedisCommands::from(parsed_resp.0).execute(cache.clone());
 
         // Hardcode PONG response for now
         stream.write(&response).unwrap();
@@ -35,12 +39,14 @@ fn handle_client(mut stream: TcpStream) {
 
 fn main() -> std::io::Result<()> {
     let listener = TcpListener::bind("127.0.0.1:6379").unwrap();
+    let cache: SharedCache = Arc::new(Mutex::new(HashMap::new()));
 
     for stream in listener.incoming() {
         match stream {
             Ok(stream) => {
+                let cache_clone = cache.clone();
                 thread::spawn(|| {
-                    handle_client(stream);
+                    handle_client(stream, cache_clone);
                 });
             }
             Err(e) => {