pull_request.rs: Parse JSON payload to create `CommitRef` struct

The test now passes, and we create our `CommitRef` struct using actual
values from the parsed JSON.

In order to get the branch name, we need the part after the last "/" in
the "ref" key.

There are a ton of `unwrap`s here, but at least it's a start and it's
working now.

1 files changed, 15 insertions, 5 deletions

diff --git a/src/pull_request.rs b/src/pull_request.rs
index 75e3209..47b1eab 100644
--- a/src/pull_request.rs
+++ b/src/pull_request.rs
@@ -1,3 +1,6 @@
+extern crate json;
+
+
 #[derive(Debug)]
 struct CommitRef {
     repo: String,
@@ -6,11 +9,18 @@ struct CommitRef {
 }
 
 impl CommitRef {
-    pub fn new(json: String) -> CommitRef {
+    pub fn new(json_str: &str) -> CommitRef {
+        let mut github_push_event = json::parse(json_str).unwrap();
+
+        let commit_ref = github_push_event["ref"].take_string().unwrap();
+        let branch_parts: Vec<&str> = commit_ref
+            .split('/')
+            .collect();
+
         CommitRef {
-            repo: "test".to_string(),
-            sha: "test".to_string(),
-            branch: "test".to_string(),
+            repo: github_push_event["repository"]["name"].take_string().unwrap(),
+            sha: github_push_event["head_commit"]["id"].take_string().unwrap(),
+            branch: branch_parts.last().unwrap().to_string(),
         }
     }
 }
@@ -184,7 +194,7 @@ mod tests {
             "type": "User",
             "site_admin": false
           }
-        }"#.to_string();
+        }"#;
 
         let commit_ref = CommitRef::new(payload);