add caldav mcp server

refactoring

mcp_server_collection/src/datetime.rs

@@ -1,38 +1,56 @@
-use chrono::{Datelike, Local};
-use rmcp::model::{Implementation, ServerCapabilities, ServerInfo};
-use rmcp::{tool, tool_handler, tool_router, ServerHandler};
+use crate::server_handler::{McpServerHandler, McpServerHandlerError};
+use chrono::{Datelike, Local, Utc};
 use rmcp::handler::server::tool::ToolRouter;
-use crate::McpServerHandler;
+use rmcp::model::{Implementation, ServerCapabilities, ServerInfo};
+use rmcp::{ServerHandler, tool, tool_handler, tool_router};
+use toml::Value;
+use toml::map::Map;
 
 #[derive(Debug, Clone)]
-pub struct DateTimeHandler {
-    tool_router: ToolRouter<Self>
+pub(crate) struct DateTimeHandler {
+    tool_router: ToolRouter<Self>,
 }
 
 impl McpServerHandler for DateTimeHandler {
-    fn new() -> Self {
-        DateTimeHandler { tool_router: Self::tool_router() }
+    async fn new(
+        _additional_properties: Map<String, Value>,
+    ) -> Result<Self, McpServerHandlerError> {
+        Ok(DateTimeHandler {
+            tool_router: Self::tool_router(),
+        })
     }
 }
 
 #[tool_router]
 impl DateTimeHandler {
-    #[tool(description = "returns the local datetime in ISO 8601", annotations(read_only_hint = true))]
+    #[tool(
+        description = "returns the local datetime in ISO 8601",
+        annotations(read_only_hint = true)
+    )]
     fn get_local_datetime() -> String {
         Local::now().format("%+").to_string()
     }
 
-    #[tool(description = "returns the utc datetime in ISO 8601", annotations(read_only_hint = true))]
+    #[tool(
+        description = "returns the utc datetime in ISO 8601",
+        annotations(read_only_hint = true)
+    )]
     fn get_utc_datetime() -> String {
-        Local::now().format("%+").to_string()
+        Utc::now().format("%+").to_string()
     }
 
-    #[tool(description = "return current week number in year", annotations(read_only_hint = true))]
+    #[tool(
+        description = "return current week number in year",
+        annotations(read_only_hint = true)
+    )]
     fn get_week() -> String {
         Local::now().iso_week().week().to_string()
     }
 
-    #[tool(description = "return current weekday", annotations(read_only_hint = true))]
+    #[tool(
+        description = "return current weekday",
+        annotations(read_only_hint = true)
+    )]
     fn get_weekday() -> String {
         Local::now().weekday().to_string()
     }
@@ -42,6 +60,10 @@ impl DateTimeHandler {
 impl ServerHandler for DateTimeHandler {
     fn get_info(&self) -> ServerInfo {
         ServerInfo::new(ServerCapabilities::builder().enable_tools().build())
-            .with_instructions("A simple clock/datetime provider. It is read only and thus safe to use.".to_string()).with_server_info(Implementation::new("datetime", env!("CARGO_PKG_VERSION")))
+            .with_instructions(
+                "A simple clock/datetime provider. It is read only and thus safe to use."
+                    .to_string(),
+            )
+            .with_server_info(Implementation::new("datetime", env!("CARGO_PKG_VERSION")))
     }
-}
+}