1 files changed, 59 insertions, 0 deletions
diff --git a/services/f3/driver/reactions.go b/services/f3/driver/reactions.go
new file mode 100644
index 0000000..b7fd5e8
--- /dev/null
+++ b/services/f3/driver/reactions.go
@@ -0,0 +1,59 @@
+// Copyright Earl Warren <contact@earl-warren.org>
+// Copyright Loïc Dachary <loic@dachary.org>
+// SPDX-License-Identifier: MIT
+
+package driver
+
+import (
+	"context"
+	"fmt"
+
+	"code.gitea.io/gitea/models/db"
+	issues_model "code.gitea.io/gitea/models/issues"
+
+	f3_tree "code.forgejo.org/f3/gof3/v3/tree/f3"
+	"code.forgejo.org/f3/gof3/v3/tree/generic"
+	"xorm.io/builder"
+)
+
+type reactions struct {
+	container
+}
+
+func (o *reactions) ListPage(ctx context.Context, page int) generic.ChildrenSlice {
+	pageSize := o.getPageSize()
+
+	reactionable := f3_tree.GetReactionable(o.GetNode())
+	reactionableID := f3_tree.GetReactionableID(o.GetNode())
+
+	sess := db.GetEngine(ctx)
+	cond := builder.NewCond()
+	switch reactionable.GetKind() {
+	case f3_tree.KindIssue, f3_tree.KindPullRequest:
+		project := f3_tree.GetProjectID(o.GetNode())
+		issue, err := issues_model.GetIssueByIndex(ctx, project, reactionableID)
+		if err != nil {
+			panic(fmt.Errorf("GetIssueByIndex %v %w", reactionableID, err))
+		}
+		cond = cond.And(builder.Eq{"reaction.issue_id": issue.ID})
+	case f3_tree.KindComment:
+		cond = cond.And(builder.Eq{"reaction.comment_id": reactionableID})
+	default:
+		panic(fmt.Errorf("unexpected type %v", reactionable.GetKind()))
+	}
+
+	sess = sess.Where(cond)
+	if page > 0 {
+		sess = db.SetSessionPagination(sess, &db.ListOptions{Page: page, PageSize: pageSize})
+	}
+	reactions := make([]*issues_model.Reaction, 0, 10)
+	if err := sess.Find(&reactions); err != nil {
+		panic(fmt.Errorf("error while listing reactions: %v", err))
+	}
+
+	return f3_tree.ConvertListed(ctx, o.GetNode(), f3_tree.ConvertToAny(reactions...)...)
+}
+
+func newReactions() generic.NodeDriverInterface {
+	return &reactions{}
+}