added get cmd to handle_mize_message function

- and _commit field, that automatically imcrements

src/server/proto.rs

@@ -1,7 +1,61 @@
 
+use std::vec;
+
 use crate::server::itemstore;
+use crate::server::itemstore::encode;
 
-async fn handle_mize_message(message: Vec<u8>){
+const VERSION: u8 = 1;
+
+async fn handle_mize_message(
+    message: Vec<u8>,
+    itemstore: itemstore::Itemstore,
+    ) -> Option<Vec<u8>>{
+
+    let version = &message[0..1];
+    let cmd = &message[1..2];
+
+    // 1:   get
+    // 2:   give
+    // 3:   get_val
+    // 4:   give_val
+    // 5:   unauthorized
+    // 6:   sub
+    // 7:   unsub
+    // 8:   update_request
+    // 9:   update_deny
+    // 10:  update
+    // 11:  delete
+    // 12:  create
+    match cmd[0] {
+        1 => {
+            let id: u64 = u64::from_be_bytes(message[2..9].try_into().expect("slice with incorrect length"));
+            let id_bytes = id.to_be_bytes();
+            let mut answer: Vec<u8> = vec![VERSION, 2, id_bytes[0], id_bytes[1], id_bytes[2], id_bytes[3]];
+            let item = itemstore.get(id).await;
+
+            let mut temp: Vec<Vec<u8>> = Vec::new();
+
+            for field in item {
+                let encoded = encode(field.to_vec());
+                temp.push(encoded);
+            }
+
+
+            return Some(answer);
+        },
+        2 => {return None;},
+        3 => {return None;},
+        4 => {return None;},
+        5 => {return None;},
+        6 => {return None;},
+        7 => {return None;},
+        8 => {return None;},
+        9 => {return None;},
+        10 => {return None;},
+        11 => {return None;},
+        12 => {return None;},
+        _ => {return None;},
+    }
 }