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use std::fmt::{self, Write};
use crate::{ValidationError, ValidationErrors, ValidationErrorsKind};
impl fmt::Display for ValidationError {
fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
if let Some(msg) = self.message.as_ref() {
write!(fmt, "{}", msg)
} else {
write!(fmt, "Validation error: {} [{:?}]", self.code, self.params)
}
}
}
fn display_errors(
fmt: &mut fmt::Formatter<'_>,
errs: &ValidationErrorsKind,
path: &str,
) -> fmt::Result {
fn display_struct(
fmt: &mut fmt::Formatter<'_>,
errs: &ValidationErrors,
path: &str,
) -> fmt::Result {
let mut full_path = String::new();
write!(&mut full_path, "{}.", path)?;
let base_len = full_path.len();
for (path, err) in errs.errors() {
write!(&mut full_path, "{}", path)?;
display_errors(fmt, err, &full_path)?;
full_path.truncate(base_len);
}
Ok(())
}
match errs {
ValidationErrorsKind::Field(errs) => {
write!(fmt, "{}: ", path)?;
let len = errs.len();
for (idx, err) in errs.iter().enumerate() {
if idx + 1 == len {
write!(fmt, "{}", err)?;
} else {
write!(fmt, "{}, ", err)?;
}
}
Ok(())
}
ValidationErrorsKind::Struct(errs) => display_struct(fmt, errs, path),
ValidationErrorsKind::List(errs) => {
let mut full_path = String::new();
write!(&mut full_path, "{}", path)?;
let base_len = full_path.len();
for (idx, err) in errs.iter() {
write!(&mut full_path, "[{}]", idx)?;
display_struct(fmt, err, &full_path)?;
full_path.truncate(base_len);
}
Ok(())
}
}
}
impl fmt::Display for ValidationErrors {
fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
for (idx, (path, err)) in self.errors().iter().enumerate() {
display_errors(fmt, err, path)?;
if idx + 1 < self.errors().len() {
writeln!(fmt)?;
}
}
Ok(())
}
}