Implement some persistency features

server/texture-sync-server/src/model/sha256.rs

@@ -1,20 +1,29 @@
 use serde::{Deserialize, Deserializer, Serialize, Serializer};
 
-#[derive(Clone, Debug, Deserialize, Serialize, Eq, PartialEq)]
+#[derive(Clone, Debug, Deserialize, Serialize, Eq, Hash, PartialEq)]
 pub struct Sha256(#[serde(serialize_with = "as_hex", deserialize_with = "from_hex")] pub [u8; 32]);
 
+fn hash_to_hex_string(hash: &[u8; 32]) -> String {
+    use std::fmt::*;
+
+    let mut hex_string = String::with_capacity(64);
+    for digit in hash.iter() {
+        write!(hex_string, "{:02X}", digit).unwrap();
+    }
+    hex_string
+}
+
+impl Sha256 {
+    pub fn create_hex_string(&self) -> String {
+        hash_to_hex_string(&self.0)
+    }
+}
+
 fn as_hex<S>(hash: &[u8; 32], serializer: S) -> Result<S::Ok, S::Error>
 where
     S: Serializer,
 {
-    use std::fmt::*;
-
-    let mut hex_string = String::new();
-    for digit in hash {
-        write!(hex_string, "{:02X}", digit).unwrap();
-    }
-
-    serializer.serialize_str(&hex_string)
+    serializer.serialize_str(&hash_to_hex_string(hash))
 }
 
 fn from_hex<'de, D>(deserializer: D) -> Result<[u8; 32], D::Error>

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

@@ -1,6 +1,6 @@
 use serde::{Deserialize, Deserializer, Serialize, Serializer};
 
-#[derive(Clone, Debug, Deserialize, Serialize, Eq, PartialEq)]
+#[derive(Clone, Debug, Deserialize, Serialize, Eq, Hash, PartialEq)]
 pub enum TextureFormat {
     #[serde(rename = "png")]
     PNG,