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use constants::MessageType;
#[deriving(PartialEq, Eq, Show)]
pub struct Message {
from: Option<String>,
message_type: MessageType,
params: Vec<String>,
}
impl Message {
fn new (from: Option<String>, message_type: MessageType, params: Vec<String>) -> Message {
Message { from: from, message_type: message_type, params: params }
}
pub fn parse (msg: &str) -> Result<Message, &'static str> {
let message_parser = regex!(r"^(?::([^ ]+) )?([A-Z]+|[0-9]{3}) ([^\r\n\0]*)\r\n$");
match message_parser.captures(msg) {
Some(captures) => {
let from = captures.at(1);
let from = if from.len() > 0 { Some(from.to_string()) } else { None };
let command = captures.at(2);
let params = Message::parse_params(captures.at(3));
match from_str(command) {
Some(c) => Ok(Message::new(from, c, params)),
None => Err("command parsing failed"),
}
},
None => Err("message parsing failed"),
}
}
pub fn from (&self) -> &Option<String> {
&self.from
}
pub fn message_type (&self) -> &MessageType {
&self.message_type
}
pub fn params (&self) -> &Vec<String> {
&self.params
}
fn parse_params(params: &str) -> Vec<String> {
let mut offset = 0;
let len = params.len();
let mut ret = vec![];
loop {
if offset >= len {
return ret;
}
let remaining = params.slice(offset, len);
if remaining.starts_with(":") {
ret.push(remaining.to_string());
return ret;
}
match remaining.find(' ') {
Some(next) => {
ret.push(remaining.slice(0, next).to_string());
offset = next + 1;
},
None => {
ret.push(remaining.to_string());
return ret;
}
}
}
}
}
#[test]
fn test_message_parser () {
use constants::*;
{
let msg = "PASS secretpasswordhere\r\n";
assert_eq!(
Message::parse(msg),
Ok(
Message {
from: None,
message_type: CommandMessage(Pass),
params: vec!["secretpasswordhere".to_string()],
}
)
);
}
}
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