use rmcp::model::Tool;
use rmcp::ErrorData;
use serde_json::{json, Map, Value};
use crate::server::tool_trait::{get_str, McpTool, ToolContext, ToolOutput};
use crate::tool_defs::tool_def;
pub struct CtxCallgraphTool;
impl McpTool for CtxCallgraphTool {
fn name(&self) -> &'static str {
"ctx_callgraph"
}
fn tool_def(&self) -> Tool {
tool_def(
"ctx_callgraph",
"Unified call graph query. direction=callers|callees for a symbol. Returns file/symbol/line edges.",
json!({
"type": "object",
"properties": {
"symbol": { "type": "string", "description": "Symbol name to inspect" },
"direction": { "type": "string", "description": "callers|callees (default: callers)" },
"file": { "type": "string", "description": "Optional: scope to a specific file" }
},
"required": ["symbol"]
}),
)
}
fn handle(
&self,
args: &Map<String, Value>,
ctx: &ToolContext,
) -> Result<ToolOutput, ErrorData> {
let symbol = get_str(args, "symbol")
.ok_or_else(|| ErrorData::invalid_params("symbol is required", None))?;
let direction = get_str(args, "direction").unwrap_or_else(|| "callers".to_string());
let file = get_str(args, "file");
let result = crate::tools::ctx_callgraph::handle(
&symbol,
file.as_deref(),
&ctx.project_root,
&direction,
);
Ok(ToolOutput {
text: result,
original_tokens: 0,
saved_tokens: 0,
mode: Some(direction),
path: None,
})
}
}