From 052db391cc6757ad6688744a6c1fead19ee71bf1 Mon Sep 17 00:00:00 2001
From: apiraino <apiraino@users.noreply.github.com>
Date: Wed, 12 Jun 2024 12:27:59 +0200
Subject: [PATCH] Guard against overflowing GitHub ID comments

Recently we overflowed the comment ID counter for comments on GitHub.

This causes some comment IDs from this URL https://rfcbot.rs/api/all to be invalid.

This patch is a follow-up to this commit https://github.com/rust-lang/rfcbot-rs/commit/f9d84fa85b54296896bcbb2cf04049f783912ea6 to avoid some tooling (notably meetings agenda generators) crashing when retrieving comments with invalid IDs.

More info about this incident at: https://rust-lang.zulipchat.com/#narrow/stream/242791-t-infra/topic/rfcbot.20asleep/near/442898636
---
 src/github.rs | 28 +++++++++++++++++++++-------
 src/rfcbot.rs |  6 +++---
 2 files changed, 24 insertions(+), 10 deletions(-)

diff --git a/src/github.rs b/src/github.rs
index 9936249d..fe319572 100644
--- a/src/github.rs
+++ b/src/github.rs
@@ -510,7 +510,7 @@ impl Issue {
         self.state == IssueState::Open
     }
 
-    pub async fn get_comment(&self, client: &GithubClient, id: u64) -> anyhow::Result<Comment> {
+    pub async fn get_comment(&self, client: &GithubClient, id: i32) -> anyhow::Result<Comment> {
         let comment_url = format!("{}/issues/comments/{}", self.repository().url(client), id);
         let comment = client.json(client.get(&comment_url)).await?;
         Ok(comment)
@@ -1825,11 +1825,25 @@ impl<'q> IssuesQuery for Query<'q> {
                         issue.html_url, fcp.fcp.fk_bot_tracking_comment
                     );
                     let bot_tracking_comment_content = quote_reply(&fcp.status_comment.body);
-
                     let fk_initiating_comment = fcp.fcp.fk_initiating_comment;
-                    let init_comment = issue
-                        .get_comment(&client, fk_initiating_comment.try_into()?)
-                        .await?;
+                    let (initiating_comment_html_url, initiating_comment_content) =
+                        if u32::try_from(fk_initiating_comment).is_err() {
+                            // We blew out the GH comment incremental counter (a i32 on their end)
+                            // See: https://rust-lang.zulipchat.com/#narrow/stream/242791-t-infra/topic/rfcbot.20asleep
+                            log::debug!("Ignoring overflowed comment id from GitHub");
+                            ("".to_string(), "".to_string())
+                        } else {
+                            let comment = issue
+                                .get_comment(&client, fk_initiating_comment.try_into()?)
+                                .await
+                                .with_context(|| {
+                                    format!(
+                                        "failed to get first comment id={} for fcp={}",
+                                        fk_initiating_comment, fcp.fcp.id
+                                    )
+                                })?;
+                            (comment.html_url, quote_reply(&comment.body))
+                        };
 
                     // TODO: agree with the team(s) a policy to emit actual mentions to remind FCP
                     // voting member to cast their vote
@@ -1837,8 +1851,8 @@ impl<'q> IssuesQuery for Query<'q> {
                     Some(crate::actions::FCPDetails {
                         bot_tracking_comment_html_url,
                         bot_tracking_comment_content,
-                        initiating_comment_html_url: init_comment.html_url.clone(),
-                        initiating_comment_content: quote_reply(&init_comment.body),
+                        initiating_comment_html_url,
+                        initiating_comment_content,
                         disposition: fcp
                             .fcp
                             .disposition
diff --git a/src/rfcbot.rs b/src/rfcbot.rs
index e3874548..da64f6aa 100644
--- a/src/rfcbot.rs
+++ b/src/rfcbot.rs
@@ -7,9 +7,9 @@ pub struct FCP {
     pub id: u32,
     pub fk_issue: u32,
     pub fk_initiator: u32,
-    pub fk_initiating_comment: u32,
+    pub fk_initiating_comment: i32,
     pub disposition: Option<String>,
-    pub fk_bot_tracking_comment: u32,
+    pub fk_bot_tracking_comment: i32,
     pub fcp_start: Option<String>,
     pub fcp_closed: bool,
 }
@@ -50,7 +50,7 @@ pub struct FCPIssue {
 
 #[derive(Serialize, Deserialize, Debug, Clone)]
 pub struct StatusComment {
-    pub id: u64,
+    pub id: i32,
     pub fk_issue: u32,
     pub fk_user: u32,
     pub body: String,