Function clampCommentToValidRange

code-scan-action/src/github.ts:129–146

* Clamp a comment's line numbers to valid diff ranges. * Returns the adjusted comment, or null if lines cannot be clamped.

(comment: Comment, validRanges: FileLineRanges)

 * Returns the adjusted comment, or null if lines cannot be clamped.
 */
function clampCommentToValidRange(comment: Comment, validRanges: FileLineRanges): Comment | null {
  if (!comment.file || comment.line == null) {
    return comment;
  }

  const clamped = clampCommentLines(comment.file, comment.startLine, comment.line, validRanges);

  if (!clamped) {
    // File not in diff - return null to convert to general comment
    return null;
  }

  return {
    ...comment,
    startLine: clamped.startLine,
    line: clamped.line,
  };
}

/**
 * Validate review-comment locations against the current PR diff.