Initial database schema

docs/database/0000_init_helpers.sql

@@ -0,0 +1,32 @@
+-- Helpers
+
+-- In the previous version of the app, short_id was 7-14 characters long.
+-- To make migration to v2 easier, we will use a 15 character long short_id,
+-- so we can easily distinguish between v1 and v2 short_ids.
+CREATE DOMAIN short_id_v2 AS VARCHAR(15);
+
+CREATE DOMAIN varchar_short AS VARCHAR(50);
+CREATE DOMAIN varchar_normal AS VARCHAR(255);
+CREATE DOMAIN varchar_long AS VARCHAR(2500);
+
+CREATE DOMAIN varchar_email AS VARCHAR(255) CHECK (VALUE ~ '^.+@.+\..+$');
+CREATE DOMAIN varchar_fqdn AS VARCHAR(253);
+CREATE DOMAIN varchar_guid AS VARCHAR(36);
+CREATE DOMAIN varchar_password AS VARCHAR(36);
+CREATE DOMAIN varchar_slug AS VARCHAR(100);
+CREATE DOMAIN varchar_uri AS VARCHAR(2083);
+CREATE DOMAIN varchar_url AS VARCHAR(2083) CHECK (VALUE ~ '^https?://|^http?://');
+
+CREATE DOMAIN server_time AS BIGINT;
+CREATE DOMAIN server_time_with_default AS BIGINT DEFAULT EXTRACT(EPOCH FROM NOW());
+
+CREATE DOMAIN numeric_20_11 AS NUMERIC(20, 11);
+
+-- Function to set created_at and updated_at
+CREATE OR REPLACE FUNCTION set_updated_at_field()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_at := EXTRACT(EPOCH FROM NOW());
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;