Add tokens routes

moneymgr_backend/src/controllers/server_controller.rs

@@ -8,15 +8,45 @@ pub async fn robots_txt() -> HttpResponse {
         .body("User-agent: *\nDisallow: /\n")
 }
 
+#[derive(serde::Serialize)]
+pub struct LenConstraints {
+    min: usize,
+    max: usize,
+}
+
+impl LenConstraints {
+    pub fn new(min: usize, max: usize) -> Self {
+        Self { min, max }
+    }
+    pub fn not_empty(max: usize) -> Self {
+        Self { min: 1, max }
+    }
+    pub fn max_only(max: usize) -> Self {
+        Self { min: 0, max }
+    }
+
+    pub fn check_str(&self, s: &str) -> bool {
+        s.len() >= self.min && s.len() <= self.max
+    }
+
+    pub fn check_u32(&self, v: u32) -> bool {
+        v >= self.min as u32 && v <= self.max as u32
+    }
+}
+
 #[derive(serde::Serialize)]
 pub struct ServerConstraints {
-    // TODO
+    pub token_name: LenConstraints,
+    pub token_ip_net: LenConstraints,
+    pub token_max_inactivity: LenConstraints,
 }
 
 impl Default for ServerConstraints {
     fn default() -> Self {
         Self {
-            // TODO
+            token_name: LenConstraints::new(5, 255),
+            token_ip_net: LenConstraints::max_only(44),
+            token_max_inactivity: LenConstraints::new(3600, 3600 * 24 * 365),
         }
     }
 }