68 lines
1.9 KiB
PL/PgSQL
68 lines
1.9 KiB
PL/PgSQL
-- Follow notifications: trigger + metadata
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alter table if exists notifications
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add column if not exists metadata jsonb not null default '{}'::jsonb;
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do $$
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begin
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alter type notification_type add value if not exists 'follow_request';
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alter type notification_type add value if not exists 'new_follower';
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alter type notification_type add value if not exists 'request_accepted';
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end $$;
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create or replace function handle_follow_notification()
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returns trigger
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language plpgsql
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as $$
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begin
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if tg_op = 'INSERT' then
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if new.status = 'pending' then
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insert into notifications (user_id, type, actor_id, metadata)
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values (
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new.following_id,
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'follow_request',
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new.follower_id,
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jsonb_build_object(
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'follower_id', new.follower_id,
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'following_id', new.following_id,
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'status', new.status
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)
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);
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elsif new.status = 'accepted' then
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insert into notifications (user_id, type, actor_id, metadata)
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values (
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new.following_id,
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'new_follower',
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new.follower_id,
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jsonb_build_object(
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'follower_id', new.follower_id,
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'following_id', new.following_id,
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'status', new.status
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)
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);
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end if;
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elsif tg_op = 'UPDATE' then
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if old.status = 'pending' and new.status = 'accepted' then
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insert into notifications (user_id, type, actor_id, metadata)
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values (
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new.follower_id,
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'request_accepted',
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new.following_id,
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jsonb_build_object(
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'follower_id', new.follower_id,
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'following_id', new.following_id,
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'status', new.status
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)
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);
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end if;
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end if;
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return new;
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end;
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$$;
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drop trigger if exists follow_notification_trigger on follows;
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create trigger follow_notification_trigger
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after insert or update on follows
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for each row execute function handle_follow_notification();
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