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8feeaa5d69
### Super high level description: Adds a nested/threaded view for Discourse topics, allowing posts to be displayed as an indented reply tree instead of the default flat chronological stream. Backend: - New /n/:slug/:topic_id routes serving roots, children (paginated), and context (ancestor chain) endpoints - TreeLoader recursively fetches reply trees with configurable max depth, Sort supports top/new/old ordering - NestedViewPostStat caches per-post reply counts (direct + total descendants, whisper-aware) with a backfill job for existing data - NestedTopic model tracks per-topic opt-in and pinned post Frontend: - Recursive <NestedPost> / <NestedPostChildren> components with lazy-load expansion, cloaking, and scroll tracking - NestedViewCache service preserves expansion state and scroll position across back/forward navigation (15 entries, 10min TTL) - Context view for deep-linking to a specific post with its ancestor chain - Floating actions bar, sort selector, real-time MessageBus updates Site settings (hidden): nested_replies_enabled, nested_replies_default, nested_replies_default_sort, nested_replies_max_depth, nested_replies_cap_nesting_depth, nested_replies_toggle_mode_groups, plus a per-category default override. Co-authored-by: Rafael Silva <xfalcox@gmail.com> Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com> Co-authored-by: Sérgio Saquetim <saquetim@discourse.org>
51 lines
1.1 KiB
Ruby
51 lines
1.1 KiB
Ruby
# frozen_string_literal: true
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class NestedTopic::TogglePin
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include Service::Base
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params do
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attribute :topic_id, :integer
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attribute :post_id, :integer
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validates :topic_id, presence: true
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validates :post_id, presence: true
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end
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model :topic
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model :post
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policy :staff_can_edit
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policy :post_is_root
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model :nested_topic, :find_or_create_nested_topic
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policy :within_pin_limit
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transaction { step :toggle_pin }
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private
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def fetch_topic(params:)
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Topic.find_by(id: params.topic_id)
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end
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def fetch_post(topic:, params:)
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topic.posts.find_by(id: params.post_id)
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end
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def staff_can_edit(guardian:, topic:)
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guardian.can_edit?(topic) && guardian.is_staff?
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end
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def post_is_root(post:)
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post.reply_to_post_number.blank? || post.reply_to_post_number == 1
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end
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def find_or_create_nested_topic(topic:)
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topic.nested_topic || NestedTopic.find_or_create_by!(topic: topic)
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end
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def within_pin_limit(nested_topic:, post:)
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!nested_topic.pin_limit_reached? || nested_topic.pinned_post_ids.include?(post.id)
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end
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def toggle_pin(nested_topic:, post:)
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nested_topic.toggle_pin(post.id)
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end
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end
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