add gitea sig header check, add Json errors, begin AppState

src/gitea.rs

@@ -1,17 +1,27 @@
 use anyhow::anyhow;
 use serde_json::Value;
 
+use crate::errors::AppError;
 
 pub enum WebhookType {
-    Review(u64, String)
+    Review(u64, String),
 }
 
 impl TryFrom<Value> for WebhookType {
-    type Error = anyhow::Error;
+    type Error = AppError;
 
     fn try_from(json: Value) -> Result<Self, Self::Error> {
         let pull_request = json.get("pull_request");
         let comment = json.get("comment");
+        let action = json
+            .get("action")
+            .ok_or(anyhow!("action not found"))?
+            .as_str()
+            .ok_or(anyhow!("error while action"))?;
+
+        if action != "created" {
+            return Err(AppError::BadJsonStructErr);
+        }
 
         if let (Some(pull_request), Some(comment)) = (pull_request, comment) {
             let comment_body = comment
@@ -30,6 +40,6 @@ impl TryFrom<Value> for WebhookType {
             return Ok(WebhookType::Review(pr_id, comment_body));
         }
 
-        anyhow::bail!("unknow webhook type")
+        Err(AppError::BadJsonStructErr)
     }
-}
+}