sanitize review start_line/end_line (#189)

Author: harjotgill

dist/index.js

@@ -148,7 +148,6 @@ ${tag}`
 ${message}
 
 ${tag}`
-
     this.reviewCommentsBuffer.push({
       path,
       start_line,
@@ -166,13 +165,20 @@ ${tag}`
           pull_number,
           commit_id,
           event: 'COMMENT',
-          comments: this.reviewCommentsBuffer.map(comment => ({
-            path: comment.path,
-            body: comment.message,
-            line: comment.end_line,
-            start_line: comment.start_line,
-            start_side: 'RIGHT'
-          }))
+          comments: this.reviewCommentsBuffer.map(comment => {
+            const commentData: any = {
+              path: comment.path,
+              body: comment.message,
+              line: comment.end_line,
+              start_side: 'RIGHT'
+            }
+
+            if (comment.start_line !== comment.end_line) {
+              commentData.start_line = comment.start_line
+            }
+
+            return commentData
+          })
         })
         this.reviewCommentsBuffer = []
       }

src/commenter.ts

@@ -609,6 +609,7 @@ ${comment_chain}
             core.warning('No pull request found, skipping.')
             continue
           }
+
           // sanitize review's start_line and end_line
           // with patches' start_line and end_line
           // if needed adjust start_line and end_line
@@ -621,15 +622,20 @@ ${comment_chain}
             if (review.start_line >= start_line) {
               closest_start_line = start_line
               closest_end_line = end_line
-              if (review.end_line <= end_line) {
+              if (
+                review.end_line <= end_line &&
+                review.end_line >= start_line
+              ) {
                 within_patch = true
                 break
               }
             }
           }
+
           if (!within_patch) {
             // map the review to the closest patch
             review.comment = `> Note: This review was outside of the patch, so it was mapped it to the closest patch. Original lines [${review.start_line}-${review.end_line}]
+
 ${review.comment}`
             review.start_line = closest_start_line
             review.end_line = closest_end_line