From 3d73fdefbcaa7271368792b290f719192a0d122f Mon Sep 17 00:00:00 2001
From: Lembot <clanker@lemony.cricket>
Date: Fri, 9 Jan 2026 23:03:04 -0500
Subject: [PATCH] feat: auto-follow objects created by user

When a user creates a proposition, document, tag, or source,
automatically add it to their default follow list ("My Follows").

Implements database triggers on the propositions, documents, tags,
and sources tables that insert into follow_list_entries after creation.

Closes #133

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 .../V088__auto_follow_created_entities.sql    | 80 +++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 ratings-sql/V088__auto_follow_created_entities.sql

diff --git a/ratings-sql/V088__auto_follow_created_entities.sql b/ratings-sql/V088__auto_follow_created_entities.sql
new file mode 100644
index 0000000..84ae098
--- /dev/null
+++ b/ratings-sql/V088__auto_follow_created_entities.sql
@@ -0,0 +1,80 @@
+-- V088: Auto-follow objects created by user
+-- When a user creates a proposition, document, tag, or source,
+-- automatically add it to their default follow list ("My Follows").
+
+-- =============================================================================
+-- Function: auto_follow_created_entity
+-- Generic trigger function to add newly created entities to creator's default follow list
+-- =============================================================================
+
+CREATE OR REPLACE FUNCTION public.auto_follow_created_entity()
+RETURNS TRIGGER AS $$
+DECLARE
+    v_default_list_id INTEGER;
+    v_entity_type VARCHAR(50);
+BEGIN
+    -- Get the creator's default follow list
+    v_default_list_id := public.get_user_default_follow_list_id(NEW.creator_id);
+
+    -- If no default list exists, skip (shouldn't happen for normal users)
+    IF v_default_list_id IS NULL THEN
+        RETURN NEW;
+    END IF;
+
+    -- Determine entity type based on the table name
+    v_entity_type := TG_ARGV[0];
+
+    -- Insert into follow_list_entries (ignore if already exists)
+    INSERT INTO public.follow_list_entries (creator_id, follow_list_id, entity_type, entity_id)
+    VALUES (NEW.creator_id, v_default_list_id, v_entity_type, NEW.id)
+    ON CONFLICT (follow_list_id, entity_type, entity_id) DO NOTHING;
+
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+COMMENT ON FUNCTION public.auto_follow_created_entity() IS 'Trigger function to automatically add newly created entities to the creator''s default follow list';
+
+-- =============================================================================
+-- Trigger: Auto-follow newly created propositions
+-- =============================================================================
+
+CREATE TRIGGER trg_auto_follow_proposition
+    AFTER INSERT ON public.propositions
+    FOR EACH ROW
+    EXECUTE FUNCTION public.auto_follow_created_entity('proposition');
+
+COMMENT ON TRIGGER trg_auto_follow_proposition ON public.propositions IS 'Automatically adds new propositions to the creator''s default follow list';
+
+-- =============================================================================
+-- Trigger: Auto-follow newly created documents
+-- =============================================================================
+
+CREATE TRIGGER trg_auto_follow_document
+    AFTER INSERT ON public.documents
+    FOR EACH ROW
+    EXECUTE FUNCTION public.auto_follow_created_entity('document');
+
+COMMENT ON TRIGGER trg_auto_follow_document ON public.documents IS 'Automatically adds new documents to the creator''s default follow list';
+
+-- =============================================================================
+-- Trigger: Auto-follow newly created tags
+-- =============================================================================
+
+CREATE TRIGGER trg_auto_follow_tag
+    AFTER INSERT ON public.tags
+    FOR EACH ROW
+    EXECUTE FUNCTION public.auto_follow_created_entity('tag');
+
+COMMENT ON TRIGGER trg_auto_follow_tag ON public.tags IS 'Automatically adds new tags to the creator''s default follow list';
+
+-- =============================================================================
+-- Trigger: Auto-follow newly created sources
+-- =============================================================================
+
+CREATE TRIGGER trg_auto_follow_source
+    AFTER INSERT ON public.sources
+    FOR EACH ROW
+    EXECUTE FUNCTION public.auto_follow_created_entity('source');
+
+COMMENT ON TRIGGER trg_auto_follow_source ON public.sources IS 'Automatically adds new sources to the creator''s default follow list';
-- 
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