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use std::fmt::{self, Display};
use failure::{Fail, Context, Backtrace};
use validator::ValidationErrors;
use validator::ValidationErrorsKind;
pub(crate) type Result<T> = ::std::result::Result<T, Error>;
#[derive(Debug)]
pub struct Error {
inner: Context<ErrorKind>,
}
#[derive(Clone, Fail, Debug, PartialEq)]
pub enum ErrorKind {
#[fail(display = "Expected type '{}' for field '{}'", _0, _1)]
UnexpectedType(String, String),
#[fail(display = "The given primaryType wasn't found in the types field")]
NonExistentType,
#[fail(display = "Address string should be a 0x-prefixed 40 character string, got '{}'", _0)]
InvalidAddressLength(usize),
#[fail(display = "Failed to parse hex '{}'", _0)]
HexParseError(String),
#[fail(display = "The field '{}' has an unknown type '{}'", _0, _1)]
UnknownType(String, String),
#[fail(display = "Unexpected token '{}' while parsing typename '{}'", _0, _1)]
UnexpectedToken(String, String),
#[fail(display = "Maximum depth for nested arrays is 10")]
UnsupportedArrayDepth,
#[fail(display = "{}", _0)]
ValidationError(String),
#[fail(display = "Expected {} items for array type {}, got {} items", _0, _1, _2)]
UnequalArrayItems(u64, String, u64),
#[fail(display = "Attempted to declare fixed size with length {}", _0)]
InvalidArraySize(String)
}
pub(crate) fn serde_error(expected: &str, field: Option<&str>) -> ErrorKind {
ErrorKind::UnexpectedType(expected.to_owned(), field.unwrap_or("").to_owned())
}
impl Fail for Error {
fn cause(&self) -> Option<&dyn Fail> {
self.inner.cause()
}
fn backtrace(&self) -> Option<&Backtrace> {
self.inner.backtrace()
}
}
impl Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
Display::fmt(&self.inner, f)
}
}
impl Error {
pub fn kind(&self) -> ErrorKind {
self.inner.get_context().clone()
}
}
impl From<ErrorKind> for Error {
fn from(kind: ErrorKind) -> Error {
Error { inner: Context::new(kind) }
}
}
impl From<Context<ErrorKind>> for Error {
fn from(inner: Context<ErrorKind>) -> Error {
Error { inner }
}
}
impl From<ValidationErrors> for Error {
fn from(error: ValidationErrors) -> Self {
let mut string: String = "".into();
for (field_name, error_kind) in error.errors() {
match error_kind {
ValidationErrorsKind::Field(validation_errors) => {
for error in validation_errors {
let str_error = format!(
"the field '{}', has an invalid value {}",
field_name,
error.params["value"]
);
string.push_str(&str_error);
}
},
_ => unreachable!("#[validate] is only used on fields for regex;\
its impossible to get any other ErrorKind; qed")
}
}
ErrorKind::ValidationError(string).into()
}
}