Attempt to solve #3

Makefile

@@ -39,14 +39,25 @@ test-1: install
 .PHONY: test
 .SILENT: test
 test-2: install
-	# Call the backend canister to get the GitHub issue and capture the output
+	# Call the backend canister to get the GitHub PR that close some issue and capture the output
 	@echo "Calling get_gh_fixed_by on backend canister..."
 	@TMP_FILE=$$(mktemp); \
 	dfx canister call backend get_gh_fixed_by '("${GITHUB_TOKEN}")' > $$TMP_FILE; \
 	echo "get_gh_fixed_by response:"; \
 	cat $$TMP_FILE; \
 	rm -f $$TMP_FILE
 
+.PHONY: test
+.SILENT: test
+test-3: install
+	# Call the backend canister to get the GitHub PR merge status and capture the output
+	@echo "Calling get_gh_is_merged on backend canister..."
+	@TMP_FILE=$$(mktemp); \
+	dfx canister call backend get_gh_is_merged '("${GITHUB_TOKEN}")' > $$TMP_FILE; \
+	echo "get_gh_is_merged response:"; \
+	cat $$TMP_FILE; \
+	rm -f $$TMP_FILE	
+
 .PHONY: clean
 .SILENT: clean
 clean:

backend/backend.did

@@ -11,4 +11,6 @@ type gh_token = text;
 service : {
     "get_gh_issue": (gh_token) -> (issue);
     "get_gh_fixed_by": (gh_token) -> (text);
-}
+    "get_gh_is_merged": (gh_token) -> (text);   
+}
+

backend/src/github/api/get_is_merged.rs

@@ -0,0 +1,49 @@
+use ic_cdk::api::management_canister::http_request::{
+    http_request, CanisterHttpRequestArgument, HttpMethod,
+};
+
+use super::super::utils::github_api_host;
+
+//https://api.github.com/repos/input-output-hk/hydra/pulls/1266/merge
+pub async fn get_is_merged_impl(owner: String, repo: String, pr_nbr: i32) -> String {
+    // Setup the URL and its query parameters
+    let url = format!(
+        "https://{}/repos/{}/{}/pulls/{}/merge",
+        github_api_host(),
+        owner,
+        repo,
+        pr_nbr
+    );
+
+    // Create the request argument 
+    let request = CanisterHttpRequestArgument {
+        url: url.to_string(),
+        method: HttpMethod::GET,
+        body: None,
+        max_response_bytes: None,
+        transform: None,
+        headers: vec![],
+    };
+
+    // Make the HTTP request and wait for the response
+    match http_request(request).await {
+        Ok((response,)) => {
+            //We need to decode that Vec<u8> that is the body into readable text.
+            //To do this, we:
+            //  1. Call `String::from_utf8()` on response.body
+            //  3. We use a switch to explicitly call out both cases of decoding the Blob into ?Text
+            let str_body = String::from_utf8(response.body)
+                .expect("Transformed response is not UTF-8 encoded.");
+
+            return str_body;
+        }
+        Err((rejection_code, message)) => {
+            panic!(
+                "The http_request resulted in an error. RejectionCode: {:?}, Error: {}",
+                rejection_code, message
+            );
+        }
+    }
+}
+
+

backend/src/github/client.rs

@@ -1,5 +1,6 @@
 use super::api::get_fixed_by::get_fixed_by_impl;
 use super::api::get_issue::get_issue_impl;
+use super::api::get_is_merged::get_is_merged_impl;
 
 use super::utils::IssueResponse;
 
@@ -27,4 +28,13 @@ impl GithubClient {
         )
         .await
     }
+    pub async fn get_is_merged(&self, pr_nbr: i32) -> String {
+        get_is_merged_impl(
+            self.owner.clone(),
+            self.repo.clone(),
+            pr_nbr,
+        )
+        .await
+    }
+
 }

backend/src/lib.rs

@@ -2,6 +2,7 @@ mod github {
     pub mod api {
         pub mod get_issue;
         pub mod get_fixed_by;
+        pub mod get_is_merged;
     }
     pub mod utils;
     pub mod client;
@@ -26,4 +27,13 @@ async fn get_gh_fixed_by(github_token: String) -> String {
     let issue_nbr = 1370;
     let client = GithubClient{owner, repo, github_token};
     return client.get_fixed_by(issue_nbr).await;
+}
+
+#[ic_cdk::update]
+async fn get_gh_is_merged(github_token: String) -> String {
+    let owner = "input-output-hk".to_string();
+    let repo = "hydra".to_string();
+    let pr_nbr = 1266;
+    let client = GithubClient{owner, repo, github_token};
+    return client.get_is_merged(pr_nbr).await;
 }