Implement more persistency logic

server/texture-sync-server/src/model/mod.rs

@@ -3,6 +3,8 @@
 #![allow(unused_variables)]
 #![allow(dead_code)]
 
+use std::io;
+
 mod sha256;
 pub use sha256::Sha256;
 
@@ -18,3 +20,14 @@ pub struct Texture {
     pub resolution: (usize, usize),
     pub texture_hash: Sha256,
 }
+
+pub enum ReplaceTextureStatus {
+    // Done.
+    Ok,
+
+    // Call Again With Texture Binary
+    NeedTextureData(Sha256),
+
+    // Name or id already in use
+    Conflict,
+}