added get cmd to handle_mize_message function

- and _commit field, that automatically imcrements

src/server/itemstore.rs

@@ -1,5 +1,5 @@
 
-use std::{io, fmt::format};
+use std::{io, fmt::format, vec};
 use surrealdb::{Datastore, Key, Val};
 use itertools::Itertools;
 
@@ -37,6 +37,13 @@ impl Itemstore {
             .expect("error reading item 0 from db");
         let mut keys: Vec<Vec<u8>> = Vec::new();
 
+        //set id:_commit
+        let mut key = id.clone();
+        key.extend(":_commit".to_string().into_bytes());
+        tr.set(key.clone(), vec![0,0,0,0,0,0,0,0]);
+        keys.push(key);
+
+
         for field in item {
             let mut key = id.clone();
             key.push(':' as u8);
@@ -87,6 +94,21 @@ impl Itemstore {
             tr.set(key, val).await;
         }
 
+        //increment commit number
+        let mut commit_key = id.to_be_bytes().to_vec();
+        commit_key.extend(":_commit".to_string().into_bytes());
+
+        let mut commit_num: u64 = match tr.get(&*commit_key).await {
+            Ok(Some(val)) => u64::from_be_bytes(val.try_into().expect("error converting _commit num to u64")),
+            Ok(None) => {
+                panic!("item {} has no _commit", id);
+            },
+            Err(e) => panic!("Error while querying the db: {}", e),
+        };
+
+        commit_num += 1;
+        tr.set(commit_key, commit_num.to_be_bytes());
+
         keys = keys.into_iter().unique().collect::<Vec<Vec<u8>>>();
         tr.set(format!("{}", id).into_bytes(), encode(keys)).await;
 

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;},
+    }
 }