feat: react to no-reply decisions for issue comments (#43)

lib/src/core/issue_assistant_app.dart

@@ -390,6 +390,19 @@ class IssueAssistantApp {
     }
 
     if (!selectedResult.shouldReply) {
+      final noReplyReactionTarget = _latestHumanComment(project, thread);
+      if (noReplyReactionTarget != null) {
+        final reacted = await issueTrackerClient.createNoReplyReaction(
+          provider: project.provider,
+          trackerProject: project.repo,
+          commentId: noReplyReactionTarget.id,
+        );
+        _log(
+          'issue=${project.key}#${issue.number} '
+          'no_reply_reaction=${reacted ? "posted" : "unsupported"} '
+          'comment_id=${noReplyReactionTarget.id}',
+        );
+      }
       await database.upsertIssueThread(
         projectKey: project.key,
         issueNumber: issue.number,
@@ -564,6 +577,20 @@ class IssueAssistantApp {
     return _looksLikeBot(project, latestAuthor, latestText);
   }
 
+  GitHubIssueComment? _latestHumanComment(
+    ProjectConfig project,
+    IssueThread thread,
+  ) {
+    final latestComment = thread.latestComment;
+    if (latestComment == null) {
+      return null;
+    }
+    if (_looksLikeBot(project, latestComment.userLogin, latestComment.body)) {
+      return null;
+    }
+    return latestComment;
+  }
+
   int _countResponsesSinceLatestHuman(
     ProjectConfig project,
     IssueThread thread,

lib/src/issue_tracker/client.dart

@@ -198,6 +198,36 @@ class IssueTrackerClient {
     );
   }
 
+  Future<bool> createNoReplyReaction({
+    required IssueTrackerProvider provider,
+    required String trackerProject,
+    required int commentId,
+  }) async {
+    switch (provider) {
+      case IssueTrackerProvider.github:
+        await _runGhJson([
+          'api',
+          '-X',
+          'POST',
+          _buildApiPath(parseRepositorySlug(trackerProject), [
+            'issues',
+            'comments',
+            '$commentId',
+            'reactions',
+          ]),
+          '-H',
+          'Accept: application/vnd.github+json',
+          '-f',
+          'content=eyes',
+        ]);
+        return true;
+      case IssueTrackerProvider.gitlab:
+      case IssueTrackerProvider.gitea:
+      case IssueTrackerProvider.openproject:
+        return false;
+    }
+  }
+
   Future<String?> getAuthenticatedLogin({
     required IssueTrackerProvider provider,
   }) {

test/core/core_test.dart

@@ -247,6 +247,7 @@ projects:
       // And GitHub issue data containing a comment with an explicit assistant mention.
       final ghScript = File(p.join(sandbox.path, 'gh'));
       final ghLog = File(p.join(sandbox.path, 'gh-log.jsonl'));
+      final reactionBody = File(p.join(sandbox.path, 'reaction-body.txt'));
       final issueData = [
         {
           'number': 43,
@@ -274,6 +275,7 @@ projects:
         issueListResponse: issueData,
         commentResponses: {43: commentsData},
         ghLog: ghLog,
+        reactionBodyFile: reactionBody,
       );
 
       // And a responder that explicitly returns no_reply.
@@ -327,6 +329,17 @@ projects:
             .length,
         1,
       );
+      expect(
+        logLines
+            .where(
+              (line) => line.contains(
+                'repos/owner/sample/issues/comments/430/reactions',
+              ),
+            )
+            .length,
+        1,
+      );
+      expect(await reactionBody.readAsString(), 'eyes');
       expect(thread.lastCommentId, isNull);
     });
 

test/support/fake_gh.dart

@@ -14,6 +14,7 @@ Future<void> writeFakeGhScript({
   Set<int>? postCommentIssueNumbers,
   Map<String, Set<int>>? postCommentIssueNumbersByRepo,
   File? postedBodyFile,
+  File? reactionBodyFile,
   String? viewerLogin,
   bool failViewerLookup = false,
 }) async {
@@ -173,6 +174,41 @@ Future<void> writeFakeGhScript({
     }
   }
 
+  for (final repoEntry in normalizedCommentResponsesByRepo.entries) {
+    final repo = repoEntry.key;
+    for (final issueEntry in repoEntry.value.entries) {
+      for (final comment in issueEntry.value) {
+        final commentId = comment['id'];
+        if (commentId is! int) {
+          continue;
+        }
+        buffer
+          ..writeln(
+            'if [[ "\$1" == "api" && "\$4" == '
+            '"repos/$repo/issues/comments/$commentId/reactions" ]]; then',
+          )
+          ..writeln(r'''  for arg in "$@"; do''')
+          ..writeln(r'''    :''');
+        if (reactionBodyFile != null) {
+          buffer
+            ..writeln(r'''    if [[ "$arg" == content=* ]]; then''')
+            ..writeln(
+              r'''      printf '%s' "${arg#content=}" > '''
+              '"${bashScriptPath(reactionBodyFile.path)}"',
+            )
+            ..writeln(r'''    fi''');
+        }
+        buffer
+          ..writeln(r'''  done''')
+          ..writeln("  cat <<'JSON'")
+          ..writeln(jsonEncode({'id': 990, 'content': 'eyes'}))
+          ..writeln('JSON')
+          ..writeln('  exit 0')
+          ..writeln('fi');
+      }
+    }
+  }
+
   buffer
     ..writeln(r'''echo "unexpected gh args: $*" >&2''')
     ..writeln('exit 1');