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// Copyright (c) 2020 Teddy Wing
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
use std::str::FromStr;
use thiserror::Error;
use url;
use url::Url;
/// Errors parsing a suggestion URL.
#[derive(Debug, Error)]
pub enum Error {
#[error("Unable to parse URL")]
Url(#[from] url::ParseError),
#[error("URL has no path")]
NoPath,
#[error("URL has no fragment")]
NoFragment,
#[error("Unable to parse owner or repo")]
NoOwnerRepo,
}
/// The important parts of a suggestion comment URL.
#[derive(Debug)]
pub struct SuggestionUrl {
pub owner: String,
pub repo: String,
pub comment_id: String,
}
/// Parses a URL with the format
/// `https://github.com/teddywing/git-suggestion/pull/1#discussion_r459691747`.
impl FromStr for SuggestionUrl {
type Err = Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let url = Url::parse(s)?;
let path = url.path_segments()
.ok_or(Error::NoPath)?
.collect::<Vec<_>>();
if path.len() < 2 {
return Err(Error::NoOwnerRepo);
}
Ok(SuggestionUrl {
owner: path[0].to_owned(),
repo: path[1].to_owned(),
comment_id: url.fragment()
.ok_or(Error::NoFragment)?
.replacen("discussion_r", "", 1),
})
}
}
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