Re-factored Chat in "enum style"

src/core/types/chat.rs

@@ -1,18 +1,72 @@
-use crate::core::types::{ChatPermissions, ChatPhoto, Message};
+use crate::core::types::{ChatPermissions, ChatPhoto, Message, Integer};
 
-#[derive(Debug, Deserialize, Hash, PartialEq, Eq)]
+
+#[derive(Debug, Deserialize, Eq, Hash, PartialEq)]
 pub struct Chat {
-    pub id: i64,
-    pub chat_type: String,
-    pub title: Option<String>,
-    pub username: Option<String>,
-    pub first_name: Option<String>,
-    pub last_name: Option<String>,
+    pub id: Integer,
+    #[serde(flatten)]
+    pub type_: ChatType,
     pub photo: Option<ChatPhoto>,
-    pub description: Option<String>,
-    pub invite_link: Option<String>,
-    pub pinned_message: Option<Box<Message>>,
-    pub permissions: Option<ChatPermissions>,
-    pub sticker_set_name: Option<String>,
-    pub can_set_sticker_set: Option<bool>,
+}
+
+
+#[derive(Debug, Deserialize, Eq, Hash, PartialEq)]
+#[serde(rename_all = "snake_case")]
+#[serde(untagged)]
+pub enum ChatType {
+    NotPrivate {
+        title: Option<String>,
+        #[serde(flatten)]
+        type_: NotPrivateChatType,
+        description: Option<String>,
+        invite_link: Option<String>,
+        pinned_message: Option<Box<Message>>
+    },
+    Private {
+        username: Option<String>,
+        first_name: Option<String>,
+        last_name: Option<String>
+    }
+}
+
+
+#[derive(Debug, Deserialize, Eq, Hash, PartialEq)]
+#[serde(rename_all = "snake_case")]
+#[serde(tag = "type")]
+pub enum NotPrivateChatType {
+    Channel {
+        username: Option<String>
+    },
+    Group {
+        permissions: Option<ChatPermissions>
+    },
+    Supergroup {
+        username: Option<String>,
+        sticker_set_name: Option<String>,
+        can_set_sticker_set: Option<bool>,
+        permissions: Option<ChatPermissions>
+    }
+}
+
+
+#[test]
+fn test_chat_de() {
+    use serde_json::from_str;
+
+    assert_eq!(
+        Chat {
+            id: 0,
+            type_: ChatType::NotPrivate {
+                title: None,
+                type_: NotPrivateChatType::Channel {
+                    username: Some("channelname".into())
+                },
+                description: None,
+                invite_link: None,
+                pinned_message: None
+            },
+            photo: None,
+        },
+        from_str(r#"{"id":0,"type":"channel","username":"channelname"}"#).unwrap()
+    );
 }