schema: Create a type for image areas

This creates a new postgres "domain" which is a subtype of some other type
(in this case, of INTEGER[]) with some constraints applied.
We use this to create a type which is explicitly an array of length 4.

This saves us from needing to repeat this constraint everywhere (which already led to one copy-paste error)
and is arguably clearer in intent.

postgres/Dockerfile

@@ -1,4 +1,4 @@
-FROM postgres:12
+FROM postgres:17
 COPY postgres/setup.sh /docker-entrypoint-initdb.d/setup.sh
 COPY postgres/schema.sql /
 COPY postgres/buscribe.sql /

postgres/schema.sql

@@ -26,6 +26,10 @@ CREATE TYPE thumbnail_mode as ENUM (
 	'CUSTOM'
 );
 
+-- Represents an area in an image as (left, top, bottom, right)
+-- or equivalently as (x1, y1, x2, y2) where x is the top-left corner and y is the bottom-right.
+CREATE DOMAIN box_coords AS INTEGER[] CHECK (cardinality(VALUE) = 4 OR VALUE IS NULL);
+
 -- The end time for an event can be unset, "--" or a timestamp.
 -- If dashed is true, value should be the same as start time (which may be NULL if start time is unset).
 -- Otherwise value is the value (which may be NULL if end time is unset).
@@ -89,14 +93,8 @@ CREATE TABLE events (
 		OR thumbnail_mode = 'NONE'
 		OR thumbnail_last_written IS NOT NULL
 	),
-	thumbnail_crop INTEGER[] CHECK (
+	thumbnail_crop box_coords, -- pixel coordinates to crop the selected frame
-		cardinality(thumbnail_crop) = 4
+	thumbnail_location box_coords, -- pixel coordinates to position the cropped frame
-		OR thumbnail_crop IS NULL
-	), -- left, upper, right, and lower pixel coordinates to crop the selected frame
-	thumbnail_location INTEGER[] CHECK (
-		cardinality(thumbnail_location) = 4
-		OR thumbnail_location IS NULL
-	), -- left, top, right, bottom pixel coordinates to position the cropped frame
 	
 	state event_state NOT NULL DEFAULT 'UNEDITED',
 	uploader TEXT CHECK (state IN ('UNEDITED', 'EDITED', 'DONE', 'MODIFIED') OR uploader IS NOT NULL),
@@ -194,6 +192,6 @@ CREATE TABLE templates (
 	image BYTEA NOT NULL,
 	description TEXT NOT NULL DEFAULT '',
 	attribution TEXT NOT NULL DEFAULT '',
-	crop INTEGER[] NOT NULL CHECK (cardinality(crop) = 4),
+	crop box_coords NOT NULL,
-	location INTEGER[] NOT NULL CHECK (cardinality(location) = 4)
+	location box_coords NOT NULL
 );

postgres/setup.sh

@@ -1,6 +1,6 @@
 #! /bin/bash
 
-set -e
+set -eu
 
 sql() {
 	local user
@@ -14,9 +14,10 @@ sed -i "/host all all all/d" "$PGDATA/pg_hba.conf"
 echo "host all $WUBLOADER_USER all md5" >> "$PGDATA/pg_hba.conf"
 
 echo "Creating $WUBLOADER_USER"
-sql "$POSTGRES_USER" <<-EOSQL
+sql "$POSTGRES_USER" -d "$POSTGRES_DB" <<-EOSQL
 
 CREATE USER $WUBLOADER_USER LOGIN PASSWORD '$WUBLOADER_PASSWORD';
+GRANT CREATE ON SCHEMA public TO $WUBLOADER_USER;
 
 EOSQL
 
@@ -32,11 +33,7 @@ if [ -n "$REPLICATION_USER" ]; then
 	EOSQL
 
 	cat >> ${PGDATA}/postgresql.conf <<-EOF
-	wal_level = replica
+	wal_keep_size = 128MB
-	archive_mode = on
-	archive_command = 'cd .'
-	max_wal_senders = 8
-	wal_keep_segments = 8
 	EOF
 
 fi