grapha 0.1.0

Blazingly fast code intelligence CLI and MCP server for Swift and Rust
Documentation 
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use serde::{Deserialize, Serialize};

#[derive(Debug, Deserialize)]
pub struct JsonRpcRequest {
    #[allow(dead_code)] // Required by JSON-RPC protocol
    pub jsonrpc: String,
    pub id: Option<serde_json::Value>,
    pub method: String,
    #[serde(default)]
    pub params: serde_json::Value,
}

#[derive(Debug, Serialize)]
pub struct JsonRpcResponse {
    pub jsonrpc: String,
    pub id: serde_json::Value,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub result: Option<serde_json::Value>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub error: Option<JsonRpcError>,
}

#[derive(Debug, Serialize)]
pub struct JsonRpcError {
    pub code: i32,
    pub message: String,
}

#[derive(Debug, Serialize)]
pub struct ToolDefinition {
    pub name: String,
    pub description: String,
    #[serde(rename = "inputSchema")]
    pub input_schema: serde_json::Value,
}

impl JsonRpcResponse {
    pub fn success(id: serde_json::Value, result: serde_json::Value) -> Self {
        Self {
            jsonrpc: "2.0".to_string(),
            id,
            result: Some(result),
            error: None,
        }
    }

    pub fn error(id: serde_json::Value, code: i32, message: String) -> Self {
        Self {
            jsonrpc: "2.0".to_string(),
            id,
            result: None,
            error: Some(JsonRpcError { code, message }),
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn request_round_trip() {
        let json = r#"{"jsonrpc":"2.0","id":1,"method":"tools/list","params":{}}"#;
        let req: JsonRpcRequest = serde_json::from_str(json).unwrap();
        assert_eq!(req.method, "tools/list");
        assert_eq!(req.id, Some(serde_json::json!(1)));
    }

    #[test]
    fn notification_has_no_id() {
        let json = r#"{"jsonrpc":"2.0","method":"notifications/initialized"}"#;
        let req: JsonRpcRequest = serde_json::from_str(json).unwrap();
        assert!(req.id.is_none());
    }

    #[test]
    fn success_response_omits_error() {
        let resp = JsonRpcResponse::success(serde_json::json!(1), serde_json::json!({"ok": true}));
        let serialized = serde_json::to_string(&resp).unwrap();
        assert!(!serialized.contains("error"));
        assert!(serialized.contains("result"));
    }

    #[test]
    fn error_response_omits_result() {
        let resp =
            JsonRpcResponse::error(serde_json::json!(1), -32601, "method not found".to_string());
        let serialized = serde_json::to_string(&resp).unwrap();
        assert!(!serialized.contains("result"));
        assert!(serialized.contains("error"));
    }
}