1 files changed, 68 insertions, 0 deletions
diff --git a/src/http/github.rs b/src/http/github.rs
new file mode 100644
index 0000000..bdb363e
--- /dev/null
+++ b/src/http/github.rs
@@ -0,0 +1,68 @@
+use super::{Error, HttpClientExt};
+
+use serde::Deserialize;
+
+const GITHUB_API: &str = "https://api.github.com";
+
+/// Bad version of `/repos/{owner}/{repo}/{compare}/{ref}...{ref}`
+#[derive(Deserialize)]
+struct Compare {
+	status: String,
+	ahead_by: i32,
+}
+
+/// Bad version of `/repos/{owner}/{repo}/pulls/{pull_number}`
+#[derive(Deserialize)]
+struct PullRequest {
+	merge_commit_sha: String,
+}
+
+pub trait GithubClientExt {
+	/// Get the commit that merged [`pr`] in [`repo_owner`]/[`repo_name`]
+	async fn merge_commit_for(
+		&self,
+		repo_owner: &str,
+		repo_name: &str,
+		pr: u64,
+	) -> Result<String, Error>;
+
+	/// Check if [`commit`] is in [`branch`] of [`repo_owner`]/[`repo_name`]
+	async fn is_commit_in_branch(
+		&self,
+		repo_owner: &str,
+		repo_name: &str,
+		branch_name: &str,
+		commit: &str,
+	) -> Result<bool, Error>;
+}
+
+impl GithubClientExt for super::Client {
+	async fn merge_commit_for(
+		&self,
+		repo_owner: &str,
+		repo_name: &str,
+		pr: u64,
+	) -> Result<String, Error> {
+		let url = format!("{GITHUB_API}/repos/{repo_owner}/{repo_name}/pulls/{pr}");
+		let resp: PullRequest = self.get_json(&url).await?;
+		let merge_commit = resp.merge_commit_sha;
+
+		Ok(merge_commit)
+	}
+
+	async fn is_commit_in_branch(
+		&self,
+		repo_owner: &str,
+		repo_name: &str,
+		branch: &str,
+		commit: &str,
+	) -> Result<bool, Error> {
+		let url = format!(
+			"https://api.github.com/repos/{repo_owner}/{repo_name}/compare/{branch}...{commit}"
+		);
+		let resp: Compare = self.get_json(&url).await?;
+		let in_branch = resp.status != "diverged" && resp.ahead_by >= 0;
+
+		Ok(in_branch)
+	}
+}