iCalendar export: domain service + API + MCP tool (#15)

crates/mcp/src/server.rs

@@ -14,7 +14,7 @@ use schemars::JsonSchema;
 use serde::Deserialize;
 use uuid::Uuid;
 
-use crate::tools::{channels, library, schedule};
+use crate::tools::{channels, ical, library, schedule};
 
 const SERVER_NAME: &str = "k-tv-mcp";
 
@@ -201,6 +201,16 @@ impl KTvMcpServer {
         )
         .await
     }
+
+    #[tool(
+        description = "Export a channel's schedule as iCalendar (.ics). Returns RFC 5545 text."
+    )]
+    async fn export_schedule_ical(&self, #[tool(aggr)] p: ChannelIdParam) -> String {
+        match parse_uuid(&p.channel_id) {
+            Ok(id) => ical::export_schedule_ical(&self.channel_query, id).await,
+            Err(e) => e,
+        }
+    }
 }
 
 #[tool(tool_box)]

crates/mcp/src/tools/ical.rs

@@ -0,0 +1,20 @@
+use std::sync::Arc;
+
+use uuid::Uuid;
+
+use crate::error::domain_err;
+
+pub async fn export_schedule_ical(
+    channel_query: &Arc<dyn domain::ports::ChannelQuery>,
+    channel_id: Uuid,
+) -> String {
+    match channel_query.find_by_id(channel_id.into()).await {
+        Ok(Some(channel)) => domain::generate_ical(
+            channel.name(),
+            channel.timezone(),
+            channel.schedule_config(),
+        ),
+        Ok(None) => serde_json::json!({"error": "Channel not found"}).to_string(),
+        Err(e) => domain_err(e),
+    }
+}

crates/mcp/src/tools/mod.rs

@@ -1,3 +1,4 @@
 pub mod channels;
+pub mod ical;
 pub mod library;
 pub mod schedule;