hive-forge: timeline --since no longer errors on an empty window

hive-forge/src/verbs/timeline.rs

@@ -25,13 +25,14 @@
 //! what `forgejo-api` actually returns), so unlike the old `--limit`-only
 //! shape this is now an exact count, not a boolean "more" flag.
 
-use anyhow::Result;
+use anyhow::{Context, Result};
 use clap::Args as ClapArgs;
 use forgejo_api::structs::{IssueGetCommentsAndTimelineQuery, TimelineComment};
 use serde_json::{Value, json};
+use time::format_description::well_known::Rfc3339;
 
 use crate::client::{Client, index};
-use crate::verbs::{MAX_LIMIT, PAGE_SIZE, clamp_limit, parse_rfc3339, print_json};
+use crate::verbs::{MAX_LIMIT, NullableVec, PAGE_SIZE, clamp_limit, parse_rfc3339, print_json};
 
 #[derive(ClapArgs)]
 pub struct Args {
@@ -246,6 +247,20 @@ fn fetch_tail(
 /// `comments.rs`'s `fetch_since` does: ask for `limit + 1`, and a full
 /// extra row means there's more. Returns `(events, more)`, `more` a
 /// boolean rather than an exact count.
+///
+/// Deliberately bypasses the typed `forgejo-api` client
+/// (`issue_get_comments_and_timeline`) rather than calling it directly:
+/// this endpoint answers an empty `--since` window with a JSON `null`
+/// body, and the typed client's generated response type is
+/// `Vec<TimelineComment>`, which fails to deserialize `null` at all — the
+/// single most common answer to "anything new since my last check?"
+/// turns into a hard error instead of an empty list. The sibling
+/// `issue_get_comments` endpoint `comments.rs`'s own `fetch_since` calls
+/// returns `[]` for the same case and never hits this. [`NullableVec`] is
+/// this codebase's existing, tested newtype for exactly this shape of
+/// problem — used the same way for reactions and blocking-issue lists —
+/// so this reuses it via [`Client::get_api_json`] rather than inventing a
+/// second null-tolerant path.
 fn fetch_since(
     client: &Client,
     number: u64,
@@ -253,16 +268,18 @@ fn fetch_since(
     limit: u64,
 ) -> Result<(Vec<TimelineComment>, bool)> {
     let (owner, name) = client.owner_repo()?;
-    let query = IssueGetCommentsAndTimelineQuery {
-        since: Some(since),
-        before: None,
-    };
+    let idx = index(number)?;
     let fetch_limit = limit.saturating_add(1);
-    let (_, events) = client
-        .api()
-        .issue_get_comments_and_timeline(owner, name, index(number)?, query)
-        .page_size(u32::try_from(fetch_limit).unwrap_or(u32::MAX))
-        .send()?;
+    let since_str = since
+        .format(&Rfc3339)
+        .context("format --since timestamp as RFC 3339")?;
+    let fetch_limit_str = fetch_limit.to_string();
+    let path = format!("/repos/{owner}/{name}/issues/{idx}/timeline");
+    let events: NullableVec<TimelineComment> = client.get_api_json(
+        &path,
+        &[("since", since_str.as_str()), ("limit", &fetch_limit_str)],
+    )?;
+    let events = events.0;
     let limit = usize::try_from(limit).unwrap_or(usize::MAX);
     let more = events.len() > limit;
     let mut events = events;