Filtering to 'opened' pull request events.

src/githubctl/pull_request_event.rs

@@ -1,12 +1,26 @@
+use crate::json_util::get_json_object;
 use crate::json_util::get_json_string;
 
 pub struct PullRequestEvent<'a> {
     original_event: &'a serde_json::Value,
+    pub action: &'a String,
 }
 
 impl<'a> PullRequestEvent<'a> {
     pub fn new(original_event: &'a serde_json::Value) -> Result<Self, Box<dyn std::error::Error>> {
-        Ok(PullRequestEvent { original_event })
+        let payload = original_event
+            .get("payload")
+            .map(get_json_object)
+            .expect("Ran into a PullRequestEvent without a payload.");
+        let action = payload
+            .get("action")
+            .map(get_json_string)
+            .expect("Ran into a PullRequestEvent without a payload.action.");
+
+        Ok(PullRequestEvent {
+            original_event,
+            action,
+        })
     }
 
     pub fn is_a(event: &'a serde_json::Value) -> Result<bool, Box<dyn std::error::Error>> {

src/main.rs

@@ -25,10 +25,11 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
 }
 
 fn handle_event(event: serde_json::Value) -> Result<(), Box<dyn std::error::Error>> {
-    let event = if PullRequestEvent::is_a(&event)? {
-        Some(PullRequestEvent::new(&event)?)
-    } else {
-        None
-    };
+    if PullRequestEvent::is_a(&event)? {
+        let event = PullRequestEvent::new(&event)?;
+        if event.action == "opened" {
+            println!("PullRequestEvent action {}", event.action);
+        }
+    }
     Ok(())
 }