handling of update_request message implemented, but not tested

src/server/proto.rs

@@ -12,13 +12,74 @@ pub enum Response {
     None,
 }
 
+pub struct Message {
+    msg: Vec<u8>,
+    version: u8,
+    cmd: u8,
+    index: usize,
+}
+
+impl Message {
+    pub fn new(vec: Vec<u8>) -> Message {
+
+        // this weired version does not panic, while others do for some unknown reason  
+        let mut count = 0;
+
+        let mut cmd: u8 = 0;
+        let mut version: u8 = 0;
+
+        for i in vec.clone() {
+            if count == 0 {
+                version = i;
+            }
+            if count == 1 {
+                cmd = i
+            }
+
+            count += 1;
+        };
+
+        Message { msg: vec, version: version, cmd: cmd, index: 2 }
+    }
+
+    pub fn get_id(&mut self) -> u64 {
+       self.get_u64()
+    }
+
+    pub fn get_u32(&mut self) -> u32 {
+            let tmp = &self.msg[self.index..self.index + 4];
+            let num: u32 = u32::from_be_bytes([tmp[0], tmp[1], tmp[2], tmp[3]]);
+            self.index += 4;
+
+            return num;
+    }
+
+    pub fn get_u64(&mut self) -> u64 {
+            let tmp = &self.msg[self.index..self.index + 8];
+            let num: u64 = u64::from_be_bytes([tmp[0], tmp[1], tmp[2], tmp[3], tmp[4], tmp[5], tmp[6], tmp[7]]);
+            self.index += 8;
+
+            return num;
+    }
+    
+    pub fn get_bytes(&mut self, n: usize) -> Vec<u8>{
+        let tmp = &self.msg[self.index..self.index + n];
+        self.index += n;
+
+        return tmp.to_vec();
+    }
+
+}
+
 const VERSION: u8 = 1;
 
 pub async fn handle_mize_message(
-        message: Vec<u8>,
+        mut message: Message,
         itemstore: &itemstore::Itemstore,
     ) -> Response {
 
+    let old_message = message.msg.clone();
+
 
     // 1:   get
     // 2:   give
@@ -47,7 +108,7 @@ pub async fn handle_mize_message(
     let mut cmd: u8 = 0;
     let mut version: u8 = 0;
 
-    for i in message.clone() {
+    for i in old_message.clone() {
         if count == 0 {
             version = i;
         }
@@ -64,7 +125,7 @@ pub async fn handle_mize_message(
     match cmd {
         1 => {
             //let id_bytes = *&message[2..9].to_owned().clone();
-            let tmp = &message[2..10];
+            let tmp = &old_message[2..10];
             let id: u64 = u64::from_be_bytes([tmp[0], tmp[1], tmp[2], tmp[3], tmp[4], tmp[5], tmp[6], tmp[7]]);
 
             // answer:
@@ -102,11 +163,40 @@ pub async fn handle_mize_message(
         5 => {return Response::None;},
         6 => {return Response::None;},
         7 => {return Response::None;},
-        8 => {return Response::None;},
+        8 => {
+            let mut answer: Vec<u8> = message.msg.clone();
+            answer[1] = 10;
+
+            let id = message.get_id();
+
+            let mut item = itemstore.get(id).await;
+
+            let num_of_updates = message.get_u32();
+
+            for i in 0..num_of_updates {
+                let key_len = message.get_u32();
+                let key = message.get_bytes(key_len as usize);
+
+                let update_len = message.get_u32();
+                let update = message.get_bytes(update_len as usize);
+
+                //change the item
+                for mut field in item.clone() {
+                    if field[0] == key {
+                        field[1] = apply_update(field[1].clone(), update.clone());
+                    }
+                }
+            }
+            itemstore.update(id, item).await;
+
+            return Response::All(answer);
+        },
         9 => {return Response::None;},
         10 => {return Response::None;},
+
+        //delete
         11 => {
-            let tmp = &message[2..10];
+            let tmp = &old_message[2..10];
             let id: u64 = u64::from_be_bytes([tmp[0], tmp[1], tmp[2], tmp[3], tmp[4], tmp[5], tmp[6], tmp[7]]);
             if id == 0 {
                 return Response::None;
@@ -115,22 +205,24 @@ pub async fn handle_mize_message(
             itemstore.delete(id);
             return Response::None;
         },
+
+        //create
         12 => {
-            let tmp = &message[2..6];
+            let tmp = &old_message[2..6];
             let num_of_fields: u32 = u32::from_be_bytes([tmp[0], tmp[1], tmp[2], tmp[3]]);
             let mut item: Vec<[Vec<u8>; 2]> = Vec::new();
 
             let mut index = 6;
             for i in 0..num_of_fields {
-                let mut tmp = &message[index..index + 4];
+                let mut tmp = &old_message[index..index + 4];
                 let key_len = u32::from_be_bytes([tmp[0], tmp[1], tmp[2], tmp[3]]);
-                let key = message[index + 4..(index + 4 + key_len as usize)].to_vec();
+                let key = old_message[index + 4..(index + 4 + key_len as usize)].to_vec();
 
                 index += 4 + key_len as usize;
 
-                tmp = &message[index..index + 4];
+                tmp = &old_message[index..index + 4];
                 let val_len = u32::from_be_bytes([tmp[0], tmp[1], tmp[2], tmp[3]]);
-                let val = message[index + 4..(index + 4 + val_len as usize)].to_vec();
+                let val = old_message[index + 4..(index + 4 + val_len as usize)].to_vec();
                 
                 index += 4 + val_len as usize;
 
@@ -150,12 +242,7 @@ pub async fn handle_mize_message(
 
 }
 
-
-
-
-
-
-
-
-
+pub fn apply_update(val: Vec<u8>, update: Vec<u8>) -> Vec<u8>{
+    Vec::new()
+}