byGalax
123 lines
4.2 KiB
SQL
123 lines
4.2 KiB
SQL
-- Phase 4B: per-conversation whiteboards.
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--
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-- conversation_whiteboards: one row per whiteboard. Created by a member; the
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-- bubble that appears in the chat message timeline is a normal `messages`
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-- row whose plaintext payload is `{v:1, type:'whiteboard', whiteboard_id:<id>}`.
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--
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-- whiteboard_strokes: append-only stream of drawing operations. Each row is
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-- one user gesture (pen-down → pen-up); stroke_json carries the tool/color/
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-- width/points. Realtime subscribers replay rows in created_at order.
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create table if not exists public.conversation_whiteboards (
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id uuid primary key default gen_random_uuid(),
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conversation_id uuid not null references public.conversations(id) on delete cascade,
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owner_user_id uuid not null references auth.users(id) on delete cascade,
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created_at timestamptz not null default now()
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);
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create index if not exists conversation_whiteboards_conv_idx
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on public.conversation_whiteboards(conversation_id, created_at desc);
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create table if not exists public.whiteboard_strokes (
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id uuid primary key default gen_random_uuid(),
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whiteboard_id uuid not null references public.conversation_whiteboards(id) on delete cascade,
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author_user_id uuid not null references auth.users(id) on delete cascade,
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stroke_json jsonb not null,
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created_at timestamptz not null default now()
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);
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create index if not exists whiteboard_strokes_board_idx
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on public.whiteboard_strokes(whiteboard_id, created_at asc);
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alter table public.conversation_whiteboards enable row level security;
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alter table public.whiteboard_strokes enable row level security;
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drop policy if exists conversation_whiteboards_select on public.conversation_whiteboards;
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drop policy if exists conversation_whiteboards_insert on public.conversation_whiteboards;
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drop policy if exists conversation_whiteboards_delete on public.conversation_whiteboards;
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drop policy if exists whiteboard_strokes_select on public.whiteboard_strokes;
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drop policy if exists whiteboard_strokes_insert on public.whiteboard_strokes;
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drop policy if exists whiteboard_strokes_delete on public.whiteboard_strokes;
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create policy conversation_whiteboards_select
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on public.conversation_whiteboards
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for select
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using (public.is_conversation_member(conversation_id));
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create policy conversation_whiteboards_insert
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on public.conversation_whiteboards
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for insert
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with check (
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public.is_conversation_member(conversation_id)
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and owner_user_id = auth.uid()
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);
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create policy conversation_whiteboards_delete
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on public.conversation_whiteboards
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for delete
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using (owner_user_id = auth.uid());
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create policy whiteboard_strokes_select
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on public.whiteboard_strokes
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for select
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using (
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exists (
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select 1
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from public.conversation_whiteboards w
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where w.id = whiteboard_strokes.whiteboard_id
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and public.is_conversation_member(w.conversation_id)
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)
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);
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create policy whiteboard_strokes_insert
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on public.whiteboard_strokes
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for insert
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with check (
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author_user_id = auth.uid()
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and exists (
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select 1
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from public.conversation_whiteboards w
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where w.id = whiteboard_id
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and public.is_conversation_member(w.conversation_id)
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)
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);
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create policy whiteboard_strokes_delete
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on public.whiteboard_strokes
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for delete
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using (
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exists (
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select 1
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from public.conversation_whiteboards w
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where w.id = whiteboard_strokes.whiteboard_id
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and public.is_conversation_member(w.conversation_id)
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)
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);
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alter table public.conversation_whiteboards replica identity full;
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alter table public.whiteboard_strokes replica identity full;
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do $$
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begin
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if not exists (
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select 1
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from pg_publication_tables
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where pubname = 'supabase_realtime'
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and schemaname = 'public'
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and tablename = 'conversation_whiteboards'
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) then
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execute 'alter publication supabase_realtime add table public.conversation_whiteboards';
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end if;
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if not exists (
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select 1
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from pg_publication_tables
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where pubname = 'supabase_realtime'
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and schemaname = 'public'
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and tablename = 'whiteboard_strokes'
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) then
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execute 'alter publication supabase_realtime add table public.whiteboard_strokes';
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end if;
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end
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$$;
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