client: Started working on ability to sync messages after last known message

kordophone/src/tests/test_client.rs

@@ -4,7 +4,7 @@ use std::collections::HashMap;
 pub use crate::APIInterface;
 use crate::{
     api::http_client::Credentials, 
-    model::{Conversation, ConversationID, JwtToken, Message}
+    model::{Conversation, ConversationID, JwtToken, Message, MessageID}
 };
 
 pub struct TestClient {
@@ -44,7 +44,13 @@ impl APIInterface for TestClient {
         Ok(self.conversations.clone())
     }
 
-    async fn get_messages(&mut self, conversation_id: &ConversationID) -> Result<Vec<Message>, Self::Error> {
+    async fn get_messages(
+        &mut self, 
+        conversation_id: &ConversationID, 
+        limit: Option<u32>, 
+        before: Option<MessageID>, 
+        after: Option<MessageID>
+    ) -> Result<Vec<Message>, Self::Error> {
         if let Some(messages) = self.messages.get(conversation_id) {
             return Ok(messages.clone())
         }