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

use tokio::sync::{mpsc::error::SendError, oneshot::error::RecvError};

use std::error::Error;
use std::fmt;

use crate::commands::responses::TypedResponseError;
use crate::raw::{ErrorResponse, Frame, ProtocolError};

/// Errors which can occur when issuing a command.
#[derive(Debug)]
pub enum CommandError {
    /// The connection to MPD was closed cleanly
    ConnectionClosed,
    /// An underlying protocol error occured, including IO errors
    Protocol(ProtocolError),
    /// Command returned an error
    ErrorResponse {
        /// The error
        error: ErrorResponse,
        /// Possible sucessful frames in the same response, empty if not in a command list
        succesful_frames: Vec<Frame>,
    },
    /// A [typed command](crate::commands) failed to convert its response.
    InvalidTypedResponse(TypedResponseError),
}

impl fmt::Display for CommandError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            CommandError::ConnectionClosed => write!(f, "The connection is closed"),
            CommandError::Protocol(_) => write!(f, "Protocol error"),
            CommandError::InvalidTypedResponse(_) => {
                write!(f, "Response was invalid for typed command")
            }
            CommandError::ErrorResponse {
                error,
                succesful_frames,
            } => write!(
                f,
                "Command returned an error (code {} - {:?}) after {} succesful frames",
                error.code,
                error.message,
                succesful_frames.len()
            ),
        }
    }
}

impl Error for CommandError {
    fn source(&self) -> Option<&(dyn Error + 'static)> {
        match self {
            CommandError::Protocol(e) => Some(e),
            CommandError::InvalidTypedResponse(e) => Some(e),
            _ => None,
        }
    }
}

#[doc(hidden)]
impl From<ProtocolError> for CommandError {
    fn from(e: ProtocolError) -> Self {
        CommandError::Protocol(e)
    }
}

#[doc(hidden)]
impl<T> From<SendError<T>> for CommandError {
    fn from(_: SendError<T>) -> Self {
        CommandError::ConnectionClosed
    }
}

#[doc(hidden)]
impl From<RecvError> for CommandError {
    fn from(_: RecvError) -> Self {
        CommandError::ConnectionClosed
    }
}

#[doc(hidden)]
impl From<ErrorResponse> for CommandError {
    fn from(error: ErrorResponse) -> Self {
        CommandError::ErrorResponse {
            error,
            succesful_frames: Vec::new(),
        }
    }
}

#[doc(hidden)]
impl From<TypedResponseError> for CommandError {
    fn from(e: TypedResponseError) -> Self {
        CommandError::InvalidTypedResponse(e)
    }
}

/// Errors which may occur while listening for state change events.
#[derive(Debug)]
pub enum StateChangeError {
    /// An underlying protocol error occured, including IO errors
    Protocol(ProtocolError),
    /// The state change message contained an error frame
    ErrorMessage(ErrorResponse),
}

impl fmt::Display for StateChangeError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            StateChangeError::Protocol(_) => write!(f, "Protocol error"),
            StateChangeError::ErrorMessage(ErrorResponse { code, message, .. }) => write!(
                f,
                "Message contained an error frame (code {} - {:?})",
                code, message
            ),
        }
    }
}

impl Error for StateChangeError {
    fn source(&self) -> Option<&(dyn Error + 'static)> {
        match self {
            StateChangeError::Protocol(e) => Some(e),
            _ => None,
        }
    }
}

#[doc(hidden)]
impl From<ErrorResponse> for StateChangeError {
    fn from(r: ErrorResponse) -> Self {
        StateChangeError::ErrorMessage(r)
    }
}

#[doc(hidden)]
impl From<ProtocolError> for StateChangeError {
    fn from(e: ProtocolError) -> Self {
        StateChangeError::Protocol(e)
    }
}