Refactor response_classes and fix clippy issues

src/response/client.rs

@@ -0,0 +1,39 @@
+use std::fmt::{Display, Formatter};
+use crate::parameter::{parameter_find, ParameterList};
+
+#[derive(Debug)]
+pub struct ResponseClient {
+    pub cid: i32,
+    pub clid: i32,
+    pub client_database_id: i32,
+    pub client_nickname: String,
+    pub client_type: i32,
+}
+
+impl Display for ResponseClient {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{} ({})", self.client_nickname, self.clid)
+    }
+}
+
+impl From<ParameterList> for ResponseClient {
+    fn from(value: ParameterList) -> Self {
+        ResponseClient {
+            cid: parameter_find(&value, "cid")
+                .unwrap_or_default()
+                .to_i32(-1),
+            clid: parameter_find(&value, "clid")
+                .unwrap_or_default()
+                .to_i32(-1),
+            client_database_id: parameter_find(&value, "client_database_id")
+                .unwrap_or_default()
+                .to_i32(-1),
+            client_nickname: parameter_find(&value, "client_nickname")
+                .unwrap_or_default()
+                .value,
+            client_type: parameter_find(&value, "channel_topic")
+                .unwrap_or_default()
+                .to_i32(0),
+        }
+    }
+}