git-next/src/server/forge/forgejo/config.rs

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use base64::Engine;
use kxio::network::{self, Network};
use terrors::OneOf;
use tracing::{error, info};
use crate::server::config::{BranchName, RepoConfig, RepoDetails};
#[derive(Debug)]
pub struct RepoConfigFileNotFound;
#[derive(Debug)]
pub struct RepoConfigIsNotFile;
#[derive(Debug)]
pub struct RepoConfigDecodeError;
#[derive(Debug)]
pub struct RepoConfigParseError;
#[derive(Debug)]
pub struct RepoConfigUnknownError(pub network::StatusCode);
type RepoConfigLoadErrors = (
RepoConfigFileNotFound,
RepoConfigIsNotFile,
RepoConfigDecodeError,
RepoConfigParseError,
RepoConfigUnknownError,
RepoConfigBranchNotFound,
);
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pub async fn load(
details: &RepoDetails,
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net: &Network,
) -> Result<RepoConfig, OneOf<RepoConfigLoadErrors>> {
let hostname = &details.forge.hostname;
let path = &details.repo;
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let filepath = ".git-next.toml";
let branch = &details.branch;
use secrecy::ExposeSecret;
let token = details.forge.token.expose_secret();
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let url = network::NetUrl::new(format!(
"https://{hostname}/api/v1/repos/{path}/contents/{filepath}?ref={branch}&token={token}"
));
info!(%url, "Loading config");
let request = network::NetRequest::new(
network::RequestMethod::Get,
url,
network::NetRequestHeaders::new(),
network::RequestBody::None,
network::ResponseType::Json,
None,
network::NetRequestLogging::None,
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);
let result = net.get::<ForgeContentsResponse>(request).await;
let response = result.map_err(|e| match e {
network::NetworkError::RequestFailed(_, status_code, _)
| network::NetworkError::RequestError(_, status_code, _) => match status_code {
network::StatusCode::NOT_FOUND => OneOf::new(RepoConfigFileNotFound),
_ => OneOf::new(RepoConfigUnknownError(status_code)),
},
_ => OneOf::new(RepoConfigUnknownError(
network::StatusCode::INTERNAL_SERVER_ERROR,
)),
})?;
let status = response.status_code();
let config = match response.response_body() {
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Some(body) => {
// we need to decode (see encoding field) the value of 'content' from the response
match body.content_type {
ForgeContentsType::File => decode_config(body).map_err(OneOf::broaden),
_ => Err(OneOf::new(RepoConfigIsNotFile)),
}
}
None => {
error!(%status, "Failed to fetch repo config file");
Err(OneOf::new(RepoConfigUnknownError(status)))
}
}?;
let config = validate(details, config, net)
.await
.map_err(OneOf::broaden)?;
Ok(config)
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}
fn decode_config(
body: ForgeContentsResponse,
) -> Result<RepoConfig, OneOf<(RepoConfigDecodeError, RepoConfigParseError)>> {
match body.encoding.as_str() {
"base64" => {
let decoded = base64::engine::general_purpose::STANDARD
.decode(body.content)
.map_err(|_| OneOf::new(RepoConfigDecodeError))?;
let decoded =
String::from_utf8(decoded).map_err(|_| OneOf::new(RepoConfigDecodeError))?;
let config = toml::from_str(&decoded).map_err(|_| OneOf::new(RepoConfigParseError))?;
Ok(config)
}
_ => Err(OneOf::new(RepoConfigDecodeError)),
}
}
#[derive(Clone, Debug, serde::Deserialize)]
struct ForgeContentsResponse {
#[serde(rename = "type")]
pub content_type: ForgeContentsType,
pub content: String,
pub encoding: String,
}
#[derive(Clone, Debug, serde::Deserialize)]
enum ForgeContentsType {
#[serde(rename = "file")]
File,
#[serde(rename = "dir")]
Dir,
#[serde(rename = "symlink")]
Symlink,
#[serde(rename = "submodule")]
Submodule,
}
#[derive(Debug)]
pub struct RepoConfigBranchNotFound(pub BranchName);
type RepoConfigValidateErrors = (RepoConfigBranchNotFound, RepoConfigUnknownError);
pub async fn validate(
details: &RepoDetails,
config: RepoConfig,
net: &Network,
) -> Result<RepoConfig, OneOf<RepoConfigValidateErrors>> {
let hostname = &details.forge.hostname;
let path = &details.repo;
use secrecy::ExposeSecret;
let token = details.forge.token.expose_secret();
let url = network::NetUrl::new(format!(
"https://{hostname}/api/v1/repos/{path}/branches?token={token}"
));
info!(%url, "Listing branches");
let request = network::NetRequest::new(
network::RequestMethod::Get,
url,
network::NetRequestHeaders::new(),
network::RequestBody::None,
network::ResponseType::Json,
None,
network::NetRequestLogging::None,
);
let result = net.get::<BranchList>(request).await;
let response = result.map_err(|e| {
error!(?e, "Failed to list branches");
OneOf::new(RepoConfigUnknownError(
network::StatusCode::INTERNAL_SERVER_ERROR,
))
})?;
let branches = response.response_body().unwrap_or_default();
if !branches
.iter()
.any(|branch| branch.name() == config.branches().main())
{
return Err(OneOf::new(RepoConfigBranchNotFound(
config.branches().main(),
)));
}
if !branches
.iter()
.any(|branch| branch.name() == config.branches().next())
{
return Err(OneOf::new(RepoConfigBranchNotFound(
config.branches().next(),
)));
}
if !branches
.iter()
.any(|branch| branch.name() == config.branches().dev())
{
return Err(OneOf::new(RepoConfigBranchNotFound(
config.branches().dev(),
)));
}
Ok(config)
}
type BranchList = Vec<Branch>;
#[derive(Debug, serde::Deserialize)]
struct Branch {
name: String,
}
impl Branch {
fn name(&self) -> BranchName {
BranchName(self.name.clone())
}
}