Can update device general information

central_backend/src/constants.rs

@@ -18,3 +18,40 @@ pub const MAX_SESSION_DURATION: u64 = 3600 * 24;
 /// List of routes that do not require authentication
 pub const ROUTES_WITHOUT_AUTH: [&str; 2] =
     ["/web_api/server/config", "/web_api/auth/password_auth"];
+
+#[derive(serde::Serialize)]
+pub struct SizeConstraint {
+    /// Minimal string length
+    min: usize,
+    /// Maximal string length
+    max: usize,
+}
+
+impl SizeConstraint {
+    pub fn new(min: usize, max: usize) -> Self {
+        Self { min, max }
+    }
+
+    pub fn validate(&self, val: &str) -> bool {
+        let len = val.trim().len();
+        len >= self.min && len <= self.max
+    }
+}
+
+/// Backend static constraints
+#[derive(serde::Serialize)]
+pub struct StaticConstraints {
+    /// Device name constraint
+    pub dev_name_len: SizeConstraint,
+    /// Device description constraint
+    pub dev_description_len: SizeConstraint,
+}
+
+impl Default for StaticConstraints {
+    fn default() -> Self {
+        Self {
+            dev_name_len: SizeConstraint::new(1, 50),
+            dev_description_len: SizeConstraint::new(0, 100),
+        }
+    }
+}