added CommandFilter

src/dispatching/dispatchers/filter/filters/command.rs

@@ -0,0 +1,147 @@
+use crate::dispatching::Filter;
+use crate::types::Message;
+use std::ops::Add;
+
+struct CommandFilter {
+    command: String,
+}
+
+impl Filter<Message> for CommandFilter {
+    fn test(&self, value: &Message) -> bool {
+        match value.text() {
+            Some(text) => {
+                match text.split_whitespace().next() {
+                    Some(command) => self.command == command,
+                    None => false
+                }
+            }
+            None => false
+        }
+    }
+}
+
+impl CommandFilter {
+    pub fn new(command: String) -> Self {
+        Self {
+            command: '/'.to_string() + command.as_str()
+        }
+    }
+    pub fn with_start_string(command: String, start_string: String) -> Self {
+        Self {
+            command: start_string.add(command.as_str())
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn commands_are_equal() {
+        let filter = CommandFilter::new("command".to_string());
+        let json = r#"{
+          "message_id": 199785,
+          "from": {
+           "id": 250918540,
+           "is_bot": false,
+           "first_name": "Андрей",
+           "last_name": "Власов",
+           "username": "aka_dude",
+           "language_code": "en"
+          },
+          "chat": {
+           "id": 250918540,
+           "first_name": "Андрей",
+           "last_name": "Власов",
+           "username": "aka_dude",
+           "type": "private"
+          },
+          "date": 1568289890,
+          "text": "/command"
+         }"#;
+        let message = serde_json::from_str::<Message>(json).unwrap();
+        assert!(filter.test(&message));
+    }
+
+    #[test]
+    fn commands_are_not_equal() {
+        let filter = CommandFilter::new("command".to_string());
+        let json = r#"{
+          "message_id": 199785,
+          "from": {
+           "id": 250918540,
+           "is_bot": false,
+           "first_name": "Андрей",
+           "last_name": "Власов",
+           "username": "aka_dude",
+           "language_code": "en"
+          },
+          "chat": {
+           "id": 250918540,
+           "first_name": "Андрей",
+           "last_name": "Власов",
+           "username": "aka_dude",
+           "type": "private"
+          },
+          "date": 1568289890,
+          "text": "/command_not_equal"
+         }"#;
+        let message = serde_json::from_str::<Message>(json).unwrap();
+        assert_eq!(filter.test(&message), false);
+    }
+
+    #[test]
+    fn command_have_args() {
+        let filter = CommandFilter::new("command".to_string());
+        let json = r#"{
+          "message_id": 199785,
+          "from": {
+           "id": 250918540,
+           "is_bot": false,
+           "first_name": "Андрей",
+           "last_name": "Власов",
+           "username": "aka_dude",
+           "language_code": "en"
+          },
+          "chat": {
+           "id": 250918540,
+           "first_name": "Андрей",
+           "last_name": "Власов",
+           "username": "aka_dude",
+           "type": "private"
+          },
+          "date": 1568289890,
+          "text": "/command arg1 arg2"
+         }"#;
+        let message = serde_json::from_str::<Message>(json).unwrap();
+        assert!(filter.test(&message));
+    }
+
+    #[test]
+    fn message_have_only_whitespace() {
+        let filter = CommandFilter::new("command".to_string());
+        let json = r#"{
+          "message_id": 199785,
+          "from": {
+           "id": 250918540,
+           "is_bot": false,
+           "first_name": "Андрей",
+           "last_name": "Власов",
+           "username": "aka_dude",
+           "language_code": "en"
+          },
+          "chat": {
+           "id": 250918540,
+           "first_name": "Андрей",
+           "last_name": "Власов",
+           "username": "aka_dude",
+           "type": "private"
+          },
+          "date": 1568289890,
+          "text": " "
+         }"#;
+        let message = serde_json::from_str::<Message>(json).unwrap();
+        assert_eq!(filter.test(&message), false);
+    }
+}

src/dispatching/dispatchers/filter/filters/mod.rs

@@ -1,3 +1,7 @@
-pub use text::*;
+pub use command::*;
+pub use message_text::*;
+pub use message_caption::*;
 
-mod text;
+mod command;
+mod message_text;
+mod message_caption;