agenterra 0.1.3

Generate production-ready MCP (Model Context Protocol) servers and clients from OpenAPI specs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131

//! Protocol abstraction for Agenterra
//!
//! This module defines the Protocol trait and implementations for different
//! communication protocols supported by Agenterra. Each protocol defines
//! how templates are organized and how code generation behaves.

use std::fmt::{self, Display};
use std::str::FromStr;

/// Supported protocols for code generation
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum Protocol {
    /// Model Context Protocol (MCP)
    Mcp,
}

impl Protocol {
    /// Get the string identifier for this protocol
    pub fn name(self) -> &'static str {
        match self {
            Protocol::Mcp => "mcp",
        }
    }

    /// Get the path segment used in template directory structure
    pub fn path_segment(self) -> &'static str {
        match self {
            Protocol::Mcp => "mcp",
        }
    }

    /// Get all available protocols
    pub fn all() -> &'static [Protocol] {
        &[Protocol::Mcp]
    }
}

impl Display for Protocol {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}", self.name())
    }
}

impl FromStr for Protocol {
    type Err = ProtocolParseError;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        match s.to_lowercase().as_str() {
            "mcp" => Ok(Protocol::Mcp),
            _ => Err(ProtocolParseError::Unknown(s.to_string())),
        }
    }
}

/// Error type for protocol parsing
#[derive(Debug, Clone, PartialEq)]
pub enum ProtocolParseError {
    Unknown(String),
}

impl Display for ProtocolParseError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ProtocolParseError::Unknown(protocol) => {
                write!(
                    f,
                    "Unknown protocol: '{}'. Available protocols: {}",
                    protocol,
                    Protocol::all()
                        .iter()
                        .map(|p| p.name())
                        .collect::<Vec<_>>()
                        .join(", ")
                )
            }
        }
    }
}

impl std::error::Error for ProtocolParseError {}

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

    #[test]
    fn test_protocol_name() {
        assert_eq!(Protocol::Mcp.name(), "mcp");
    }

    #[test]
    fn test_protocol_path_segment() {
        assert_eq!(Protocol::Mcp.path_segment(), "mcp");
    }

    #[test]
    fn test_protocol_display() {
        assert_eq!(format!("{}", Protocol::Mcp), "mcp");
    }

    #[test]
    fn test_protocol_from_str() {
        assert_eq!("mcp".parse::<Protocol>().unwrap(), Protocol::Mcp);
        assert_eq!("MCP".parse::<Protocol>().unwrap(), Protocol::Mcp);
    }

    #[test]
    fn test_protocol_from_str_invalid() {
        let result = "invalid".parse::<Protocol>();
        assert!(result.is_err());
        assert_eq!(
            result.unwrap_err(),
            ProtocolParseError::Unknown("invalid".to_string())
        );
    }

    #[test]
    fn test_protocol_all() {
        let protocols = Protocol::all();
        assert_eq!(protocols.len(), 1);
        assert!(protocols.contains(&Protocol::Mcp));
    }

    #[test]
    fn test_protocol_parse_error_display() {
        let error = ProtocolParseError::Unknown("test".to_string());
        let message = format!("{}", error);
        assert!(message.contains("Unknown protocol: 'test'"));
        assert!(message.contains("Available protocols: mcp"));
    }
}