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
132
133
134
135
136
137
138
139
140
141
142

#![crate_type = "lib"]
use std::{
    io::{Write, self},
    net::{TcpStream, Ipv4Addr},
    time::{SystemTime, UNIX_EPOCH},
    error::Error, fmt::{self, Display},
};

use chrono::{DateTime, Utc};
use serde::{Serialize, Deserialize};
use serde_json::json;

struct Connection {
    ip: &'static str, //todo: accept ipv4, ipv6, or web domain
    port: u16,
}

impl Connection {
    //todo
    //default port of 3306
    //ip parameter should be able to take ipv4, ipv6, and web domains
    fn new(ip: &'static str, port: u16) -> Self {
        Connection { ip: ip, port: port }
    }

    fn default() -> Self {
        Connection { ip: "127.0.0.1", port: 3306 }
    }

    fn connect(&self) -> io::Result<TcpStream> {
        TcpStream::connect(self.ip.to_string() + ":" + &self.port.to_string())
    }

}
struct Logger {
    id: u32,
    connection: Option<Connection>,
}

impl Logger {
    fn new(id: u32, connection: Connection) -> Self {
        Logger {
            id: id,
            connection: Some(connection),
        }
    }

    fn with_default_connection(id: u32) -> Self {
        Logger {
            id: id,
            connection: Some(Connection::default()),
        }
    }

    fn log(&self, message: &str, level: Level) -> Result<(), Box<dyn Error>> {
        // Create a new log message with the current timestamp.
        let log_message = LogMessage {
            message: message.to_string(),
            timestamp: Utc::now(),
            level,
        };

        // Send the log message to the graylog server.
        send_log_message(&log_message)
    }
}

// Struct representing a log message.
#[derive(Serialize, Deserialize)]
struct LogMessage {
    timestamp: DateTime<Utc>,
    level: Level,
    message: String,
}

// Enum laying out possible message types
#[derive(Serialize, Deserialize, Clone)]
enum Level {
    INFO,
    WARNING,
    ERROR,
    DEBUG,
    Custom(String),
}

impl Display for Level {

    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Level::INFO => write!(f, "INFO"),
            Level::WARNING => write!(f, "WARNING"),
            Level::ERROR => write!(f, "ERROR"),
            Level::DEBUG => write!(f, "DEBUG"),
            Level::Custom(str) => write!(f, "{}", str),
        }
    }

}

// Function to send a log message to the graylog server.
fn send_log_message(log_message: &LogMessage) -> Result<(), Box<dyn Error>> {
    // Establish a connection to the graylog server.
    let mut stream = TcpStream::connect("graylog.example.com:12201")?;

    // Serialize the log message as JSON.
    let json_string = serde_json::to_string(log_message)?;

    // Write the serialized JSON to the stream.
    stream.write_all(json_string.as_bytes())?;
    Ok(())
}

// Function to create and send a log message with the specified message and level.
fn log(message: &str, level: Level) -> Result<(), Box<dyn Error>> {
    // Create a new log message with the current timestamp.
    let log_message = LogMessage {
        message: message.to_string(),
        timestamp: Utc::now(),
        level,
    };

    // Send the log message to the graylog server.
    send_log_message(&log_message)
}

// // Example usage of the logger.
// fn main() -> Result<(), Box<dyn Error>> {
    
//     log("Hello, world!", Level::INFO)?;
    
//     Ok(())
// }

#[test]
fn test_levels() {

    assert_eq!("INFO", Level::INFO.to_string());
    assert_eq!("WARNING", Level::WARNING.to_string());
    assert_eq!("ERROR", Level::ERROR.to_string());
    assert_eq!("DEBUG", Level::DEBUG.to_string());

}