Add git-sugapply bin

An executable to apply a suggested change to the appropriate file in the
repo.

Add a new `SuggestionUrl` type that allows us to extract the necessary
data to fetch a suggestion comment from the GitHub API using a GitHub
pull request comment URL.

1 files changed, 45 insertions, 0 deletions

diff --git a/src/url.rs b/src/url.rs
new file mode 100644
index 0000000..d635d6f
--- /dev/null
+++ b/src/url.rs
@@ -0,0 +1,45 @@
+use std::str::FromStr;
+
+use thiserror::Error;
+
+use url;
+use url::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,
+}
+
+#[derive(Debug)]
+pub struct SuggestionUrl {
+    pub owner: String,
+    pub repo: String,
+    pub comment_id: String,
+}
+
+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<_>>();
+
+        Ok(SuggestionUrl {
+            owner: path[0].to_owned(),
+            repo: path[1].to_owned(),
+            comment_id: url.fragment()
+                .ok_or(Error::NoFragment)?
+                .replacen("discussion_r", "", 1),
+        })
+    }
+}