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use std::io::Stdout;
use std::io::Write;
use std::ops::Deref;
use librepology::v1::types::Package;
use librepology::v1::types::Problem;
use failure::Fallible as Result;
use failure::Error;
use crate::frontend::Frontend;
pub struct ListFrontend(Stdout);
impl ListFrontend {
pub fn new(stdout: Stdout) -> Self {
ListFrontend(stdout)
}
}
impl Frontend for ListFrontend {
fn list_packages(&self, packages: Vec<Package>) -> Result<()> {
let mut outlock = self.0.lock();
packages.iter().fold(Ok(()), |accu, package| {
accu.and_then(|_| {
let status: &String = if let Some(stat) = package.status() {
stat.deref() as &String
} else {
&String::from("No status")
}; // not optimal, but works for now.
let url: &String = if let Some(url) = package.www() {
if let Some(url) = url.first() {
url.deref() as &String
} else {
&String::from("")
}
} else {
String::from("")
}; // not optimal, but works for now
writeln!(outlock,
"{name:10} - {version:8} - {repo:15} - {status:5} - {www}",
name = package.name().deref(),
version = package.version().deref(),
repo = package.repo().deref(),
status = status,
www = url).map(|_| ()).map_err(Error::from)
})
})
}
fn list_problems(&self, problems: Vec<Problem>) -> Result<()> {
let mut outlock = self.0.lock();
problems.iter().fold(Ok(()), |accu, problem| {
accu.and_then(|_| {
writeln!(outlock,
"{repo:10} - {name:10} - {effname:10} - {maintainer:15} - {desc}",
repo = problem.repo().deref(),
name = problem.name().deref(),
effname = problem.effname().deref(),
maintainer = problem.maintainer().deref(),
desc = problem.problem_description())
.map(|_| ())
.map_err(Error::from)
})
})
}
}
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