Can download uploaded images

geneit_backend/src/models.rs

@@ -1,4 +1,6 @@
+use crate::app_config::AppConfig;
 use crate::schema::{families, members, memberships, photos, users};
+use crate::utils::crypt_utils::sha256;
 use diesel::prelude::*;
 
 /// User ID holder
@@ -121,6 +123,28 @@ pub struct FamilyMembership {
 #[derive(Debug, Clone, Copy, serde::Serialize, serde::Deserialize, Eq, PartialEq, Hash)]
 pub struct PhotoID(pub i32);
 
+impl PhotoID {
+    pub fn to_signed_hash(&self) -> String {
+        let secret = AppConfig::get().secret();
+        format!(
+            "{}-{}",
+            self.0,
+            sha256(format!("{secret}{}{secret}", self.0).as_bytes())
+        )
+    }
+
+    pub fn from_signed_hash(hash: &str) -> Option<Self> {
+        let (id, _) = hash.split_once('-')?;
+        let id = Self(id.parse().ok()?);
+
+        if id.to_signed_hash() != hash {
+            return None;
+        }
+
+        Some(id)
+    }
+}
+
 #[derive(Queryable, Debug, serde::Serialize)]
 pub struct Photo {
     id: i32,