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#![allow(clippy::unit_arg)]
use crate::errors::OutputFormatParseError;
use serde::Serialize;
use std::{fmt, io, str::FromStr};
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
#[cfg_attr(test, derive(proptest_derive::Arbitrary))]
pub enum OutputFormat {
Plain,
Serializable(SerializableFormat),
}
impl OutputFormat {
pub fn variants() -> &'static [&'static str] {
&["plain", "json", "json-pretty"]
}
}
impl fmt::Display for OutputFormat {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
OutputFormat::Plain => write!(f, "plain"),
OutputFormat::Serializable(SerializableFormat::Json) => write!(f, "json"),
OutputFormat::Serializable(SerializableFormat::JsonPretty) => write!(f, "json-pretty"),
}
}
}
impl FromStr for OutputFormat {
type Err = OutputFormatParseError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let val = match s {
"plain" => OutputFormat::Plain,
"json" => OutputFormat::Serializable(SerializableFormat::Json),
"json-pretty" => OutputFormat::Serializable(SerializableFormat::JsonPretty),
other => return Err(OutputFormatParseError::new(other)),
};
Ok(val)
}
}
impl Default for OutputFormat {
fn default() -> Self {
OutputFormat::Plain
}
}
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
#[cfg_attr(test, derive(proptest_derive::Arbitrary))]
pub enum SerializableFormat {
Json,
JsonPretty,
}
impl SerializableFormat {
pub fn to_writer(
self,
value: &impl Serialize,
writer: impl io::Write,
) -> serde_json::Result<()> {
match self {
SerializableFormat::Json => serde_json::to_writer(writer, value),
SerializableFormat::JsonPretty => serde_json::to_writer_pretty(writer, value),
}
}
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn output_format_variants() {
for &variant in OutputFormat::variants() {
variant.parse::<OutputFormat>().expect("variant is valid");
}
}
}