fix: confirm review submission and kill buffer on submit

ghpr-api.el

@@ -82,6 +82,28 @@ Returns a list of pull request objects on success, nil on failure."
                   (message "Error fetching pull requests: %s" error-thrown)))))
     result))
 
+(defun ghpr--get-pr (repo-name pr-number)
+  "Retrieve a single pull request by PR-NUMBER in REPO-NAME.
+Returns a parsed PR object on success, nil on failure."
+  (let ((token (ghpr--get-token))
+        (url (format "https://api.github.com/repos/%s/pulls/%s" repo-name pr-number))
+        (result nil))
+    (when token
+      (request url
+        :type "GET"
+        :headers `(("Accept" . "application/vnd.github+json")
+                   ("Authorization" . ,(format "Bearer %s" token))
+                   ("X-GitHub-Api-Version" . "2022-11-28"))
+        :parser 'json-read
+        :sync t
+        :success (cl-function
+                  (lambda (&key data &allow-other-keys)
+                    (setq result (ghpr--parse-api-pr data))))
+        :error (cl-function
+                (lambda (&key error-thrown &allow-other-keys)
+                  (message "Error fetching PR: %s" error-thrown)))))
+    result))
+
 (defun ghpr--get-diff-content (repo-name pr-number)
   "Retrieve the diff contents for PR-NUMBER in REPO-NAME."
   (let ((token (ghpr--get-token))

ghpr-review.el

@@ -68,14 +68,14 @@
     ("^\\(> \\)$"                (0 'ghpr-review-misc-line t)))
   "Font lock keywords for ghpr-review-mode.")
 
-(defvar-local ghpr--review-diff-content nil
+(defvar-local ghpr--review-base-content nil
-  "Buffer-local variable storing the diff content for the current PR.")
+  "Stores the base starting content, including diff, for the current PR.")
 
 (defvar-local ghpr--review-pr-metadata nil
-  "Buffer-local variable storing the PR metadata for the current PR.")
+  "Stores the PR metadata for the current PR.")
 
 (defvar-local ghpr--review-repo-name nil
-  "Buffer-local variable storing the repository name for the current PR.")
+  "Stores the repository name for the current PR.")
 
 (defvar ghpr-review-mode-map
   (let ((map (make-sparse-keymap))
@@ -111,7 +111,7 @@
   "Return a string of the title, body, and patch content separated by newlines."
   (let* ((body (or (alist-get 'body pr) ""))
          (content-parts (list (ghpr--pr-summary pr))))
-    (when (not (string-empty-p body))
+    (when (and body (not (string-empty-p body)))
       (push body content-parts))
     (when diff-content
       (push diff-content content-parts))
@@ -122,11 +122,11 @@
   (erase-buffer)
   (let* ((number (alist-get 'number pr))
          (diff-content (ghpr--get-diff-content repo-name number))
-         (contents (ghpr--open-pr/collect-contents pr diff-content)))
+         (contents (ghpr--prefix-lines (ghpr--open-pr/collect-contents pr diff-content))))
-    (setq ghpr--review-diff-content diff-content)
+    (setq ghpr--review-base-content contents)
     (setq ghpr--review-pr-metadata pr)
     (setq ghpr--review-repo-name repo-name)
-    (insert (ghpr--prefix-lines contents))))
+    (insert contents)))
 
 (defun ghpr--open-pr (pr repo-name)
   "Open a new buffer containing the body of the PR."
@@ -339,6 +339,14 @@ Returns an alist with comment, file-path, commit-sha, and diff-position, or nil
           (commit-sha . ,(alist-get 'commit-sha context))
           (diff-position . ,(alist-get 'diff-position context)))))))
 
+(defun ghpr--validate-base-content-unchanged ()
+  "Validate that all base content (lines with > or < prefixes) remains unchanged.
+Returns t if validation passes, nil otherwise."
+  (let* ((current-lines (split-string (buffer-string) "\n"))
+         (base-lines (split-string ghpr--review-base-content "\n"))
+         (current-base-lines (seq-filter #'ghpr--special-line-p current-lines)))
+    (equal current-base-lines base-lines)))
+
 (defun ghpr--collect-review-comments ()
   "Collect all inline review comments from the current buffer.
 Returns an alist of comments with their associated diff lines and GitHub API context.
@@ -367,6 +375,9 @@ Collects review body and inline comments from current buffer."
     (error "No PR metadata found in buffer"))
   (unless ghpr--review-repo-name
     (error "No repository name found in buffer"))
+  ;; TODO: needs better usability. maybe highlight which lines were broken/missing and restore.
+  (unless (ghpr--validate-base-content-unchanged)
+    (error "Base content has been modified. Please restore the original diff content before submitting"))
 
   (let* ((body (ghpr--collect-review-body))
          (inline-comments (ghpr--collect-review-comments))
@@ -382,13 +393,17 @@ Collects review body and inline comments from current buffer."
                (or (not body) (string-empty-p (string-trim body))))
       (error "Review body is required for %s events" event))
 
-    (unless (ghpr--create-review ghpr--review-repo-name
+    (when (yes-or-no-p (format "Submit review (%s)? " event))
+      (if (ghpr--create-review ghpr--review-repo-name
                                pr-number
                                commit-sha
                                (or body "")
                                event
                                api-comments)
-      (message "Failed to submit review"))))
+          (progn
+            (message "Review submitted successfully")
+            (kill-buffer (current-buffer)))
+        (message "Failed to submit review")))))
 
 (defun ghpr-review-comment ()
   "Submit review comments with COMMENT event."

ghpr.el

@@ -54,6 +54,15 @@
           (let ((pr (cdr (assoc selected-item pr-items))))
             (ghpr--open-pr pr repo-name))))))))
 
+(defun ghpr-open-pr (pr-number)
+  "Open a specific pull request by PR-NUMBER."
+  (interactive "nPR number: ")
+  (let* ((repo-name (ghpr--get-repo-name))
+         (pr (when repo-name (ghpr--get-pr repo-name pr-number))))
+    (if pr
+        (ghpr--open-pr pr repo-name)
+      (message "Could not open PR #%d" pr-number))))
+
 (provide 'ghpr)
 
 ;;; ghpr.el ends here