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use std::io::Stdout;
use std::io::Write;
use anyhow::Error;
use anyhow::Result;
use librepology::v1::types::Package;
use librepology::v1::types::Problem;
use crate::frontend::Frontend;
pub struct JsonFrontend(Stdout);
/// A Frontend that serializes the data to JSON
///
/// Useful for piping the data as structured data to another program.
///
/// # Warning
///
/// This frontend does _not_ maintain compatibility with repolocli itself. That means that piping
/// output from repolocli to repolocli is _NOT_ supported by this frontend.
///
impl JsonFrontend {
pub fn new(stdout: Stdout) -> Self {
JsonFrontend(stdout)
}
fn write(&self, output: String) -> Result<()> {
let mut outlock = self.0.lock();
writeln!(outlock, "{}", output).map_err(Error::from)
}
}
impl Frontend for JsonFrontend {
fn list_packages(&self, packages: Vec<Package>) -> Result<()> {
self.write(serde_json::ser::to_string_pretty(&packages).map_err(Error::from)?)
}
fn list_problems(&self, problems: Vec<Problem>) -> Result<()> {
self.write(serde_json::ser::to_string_pretty(&problems).map_err(Error::from)?)
}
}
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