75 lines
2.2 KiB
Rust
75 lines
2.2 KiB
Rust
use std::{
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error::Error,
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fmt::{self, Display, Formatter},
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};
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/// An event that is malformed or otherwise invalid.
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///
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/// When attempting to deserialize an [`EventJson`](enum.EventJson.html), an error in the input
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/// data may cause deserialization to fail, or the JSON structure may be correct, but additional
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/// constraints defined in the matrix specification are not upheld. This type provides an error
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/// message and a flag for which type of error was encountered.
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#[derive(Clone, Debug)]
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pub struct InvalidEvent {
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pub(crate) message: String,
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pub(crate) kind: InvalidEventKind,
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}
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#[derive(Copy, Clone, Debug, PartialEq, Eq)]
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pub enum InvalidEventKind {
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Deserialization,
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Validation,
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}
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impl InvalidEvent {
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/// A message describing why the event is invalid.
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pub fn message(&self) -> String {
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self.message.clone()
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}
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/// Returns whether this is a deserialization error.
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pub fn is_deserialization(&self) -> bool {
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self.kind == InvalidEventKind::Deserialization
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}
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/// Returns whether this is a validation error.
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pub fn is_validation(&self) -> bool {
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self.kind == InvalidEventKind::Validation
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}
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}
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impl Display for InvalidEvent {
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fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
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write!(f, "{}", self.message())
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}
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}
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impl Error for InvalidEvent {}
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/// An error returned when attempting to create an event with data that would make it invalid.
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///
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/// This type is similar to [`InvalidEvent`](struct.InvalidEvent.html), but used during the
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/// construction of a new event, as opposed to deserialization of an existing event from JSON.
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#[derive(Clone, Debug, PartialEq)]
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pub struct InvalidInput(pub(crate) String);
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impl Display for InvalidInput {
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fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
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write!(f, "{}", self.0)
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}
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}
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impl Error for InvalidInput {}
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/// An error when attempting to create a value from a string via the `FromStr` trait.
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#[derive(Clone, Copy, Eq, Debug, Hash, PartialEq)]
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pub struct FromStrError;
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impl Display for FromStrError {
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fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
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write!(f, "failed to parse type from string")
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}
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}
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impl Error for FromStrError {}
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