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use std::sync::Mutex;
use anyhow::anyhow;
use anyhow::Result;
use cached::Return;
use cached::TimedSizedCache;
use cached::proc_macro::cached;
use crate::model::backend::error::BackendError;
use crate::model::backend::messages::BackendRequest;
use crate::model::backend::messages::BackendResponse;
use crate::model::backend::channels::BackendRequestdReceiver;
use crate::model::backend::channels::BackendResponseSender;
pub struct BackendWorker {
repo_name: String,
repo: Mutex<git2::Repository>,
receiver: BackendRequestdReceiver,
}
impl BackendWorker {
pub fn new(
repo_name: String,
repo: Mutex<git2::Repository>,
receiver: BackendRequestdReceiver,
) -> Self {
BackendWorker { repo_name, repo, receiver }
}
pub fn run(self) {
loop {
if let Err(e) = self.handle() {
log::error!("Error in backend: {}", e);
}
}
}
fn handle(&self) -> std::result::Result<(), BackendError> {
match self.receiver.recv().map_err(|_| BackendError::ChannelError)? {
(BackendRequest::BranchList, chnl) => self.send_branch_list(chnl),
(BackendRequest::TagList, chnl) => self.send_tag_list(chnl),
}
}
fn send_branch_list(&self, sender: BackendResponseSender) -> std::result::Result<(), BackendError> {
let repo_lock = self.repo
.lock()
.map_err(|_| BackendError::LockError)?;
let branch_names = get_branch_names(&self.repo_name, &*repo_lock)
.map_err(|e| BackendError::Str(e.to_string()))?;
sender.send(BackendResponse::BranchList(branch_names.value))
.map_err(|_| BackendError::ChannelError)
}
fn send_tag_list(&self, sender: BackendResponseSender) -> std::result::Result<(), BackendError> {
let repo_lock = self.repo
.lock()
.map_err(|_| BackendError::LockError)?;
let tag_names = get_tag_names(&self.repo_name, &*repo_lock)
.map_err(|e| BackendError::Str(e.to_string()))?;
sender.send(BackendResponse::TagList(tag_names.value))
.map_err(|_| BackendError::ChannelError)
}
}
#[cached(
type = "TimedSizedCache<String, Return<Vec<String>>>",
create = "{ TimedSizedCache::with_size_and_lifespan(1, 60) }",
convert = r#"{ _repo_name.to_owned() }"#,
with_cached_flag = true,
result = true,
)]
fn get_branch_names(_repo_name: &str, repo: &git2::Repository) -> Result<cached::Return<Vec<String>>> {
repo.branches(None)?
.map(|branch| {
let branch = branch?.0;
branch.name()?
.ok_or_else(|| anyhow!("Branch name is not valid UTF8: {:?}", branch.name()))
.map(String::from)
})
.collect::<Result<Vec<String>>>()
.map(cached::Return::new)
}
#[cached(
type = "TimedSizedCache<String, Return<Vec<String>>>",
create = "{ TimedSizedCache::with_size_and_lifespan(1, 60) }",
convert = r#"{ _repo_name.to_owned() }"#,
with_cached_flag = true,
result = true,
)]
fn get_tag_names(_repo_name: &str, repo: &git2::Repository) -> Result<cached::Return<Vec<String>>> {
repo.tag_names(None)?
.into_iter()
.map(|tag| {
tag.ok_or_else(|| anyhow!("Tag name is not valid UTF8: {:?}", tag))
.map(String::from)
})
.collect::<Result<Vec<String>>>()
.map(cached::Return::new)
}
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