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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>
47 lines
914 B
Ruby
47 lines
914 B
Ruby
# frozen_string_literal: true
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class NestedTopic::Toggle
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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 :enabled, :boolean
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validates :topic_id, presence: true
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validates :enabled, inclusion: { in: [true, false] }
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end
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model :topic
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policy :staff_can_edit
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transaction do
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only_if(:enabling) { step :enable_nested_view }
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only_if(:disabling) { step :disable_nested_view }
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end
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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 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 enabling(params:)
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params.enabled
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end
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def disabling(params:)
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!params.enabled
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end
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def enable_nested_view(topic:)
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NestedTopic.find_or_create_by!(topic: topic) unless topic.nested_topic
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end
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def disable_nested_view(topic:)
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topic.nested_topic&.destroy!
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end
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end
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