From: Bernard Blackham <dagobah@ucc.gu.uwa.edu.au>
Date: Sun, 27 Jun 2004 21:08:02 +0000 (+0000)
Subject: Work on vending machine module
X-Git-Url: https://git.ucc.asn.au/?a=commitdiff_plain;h=0a3a7ac40cf6544543691a4ffa03df77a79a5329;p=zanchey%2Fdispense2.git

Work on vending machine module
---

diff --git a/sql-edition/schema/d.sql b/sql-edition/schema/d.sql
index 110a2e7..6ef9f57 100644
--- a/sql-edition/schema/d.sql
+++ b/sql-edition/schema/d.sql
@@ -111,6 +111,13 @@ GRANT EXECUTE ON FUNCTION get_balance() TO anondispense;
 
 -- internal functions follow
 
+CREATE OR REPLACE FUNCTION refund(integer) RETURNS void AS
+-- FIXME XXX DO this.
+	'
+	'
+	LANGUAGE plpgsql EXTERNAL SECURITY DEFINER;
+REVOKE ALL ON FUNCTION refund(integer) FROM public;
+
 CREATE OR REPLACE FUNCTION in_coke(varchar(16)) RETURNS boolean
     AS 'SELECT EXISTS(SELECT * FROM cokecontrollers WHERE user_name = $1)'
     LANGUAGE sql EXTERNAL SECURITY DEFINER;
@@ -390,6 +397,7 @@ INSERT INTO items VALUES ('coke', 'coke powder',	80, array['6'], NULL, 11);
 
 INSERT INTO items VALUES ('coke', 'update_coke',	NULL, NULL, '<slot number> <new name> <new price> <stock count>', NULL);
 
+DROP TABLE coke_requests;
 CREATE TABLE coke_requests (
 	request_id integer,
     request_slot integer,
@@ -519,12 +527,31 @@ INSERT INTO items VALUES ('vend', 'twisties',			120, array['11'], NULL, 8);
 INSERT INTO items VALUES ('vend', 'cheese and onion',	125, array['21'], NULL, 0);
 INSERT INTO items VALUES ('vend', 'update_vend', NULL, NULL, '<slot number> <new name> <new price> <new count>', NULL);
 
+DROP TABLE vend_requests;
 CREATE TABLE vend_requests (
 	request_id integer,
     request_slot varchar(2),
 	request_handled boolean NOT NULL DEFAULT false,
 	request_time timestamp DEFAULT now()
 );
+GRANT SELECT ON vend_requests TO vendserver;
+
+CREATE OR REPLACE FUNCTION vend_success(integer) RETURNS void AS
+	'UPDATE vend_requests SET request_handled = true WHERE request_id = $1' 
+	LANGUAGE SQL EXTERNAL SECURITY DEFINER;
+REVOKE ALL ON FUNCTION valid_vend_slot(varchar(2)) FROM public;
+GRANT EXECUTE ON FUNCTION vend_success(integer) TO vendserver;
+
+CREATE OR REPLACE FUNCTION vend_failed(integer) RETURNS void AS
+	'
+	BEGIN
+		UPDATE vend_requests SET request_handled = true WHERE request_id = $1;
+		PERFORM refund($1);
+	END;
+	'
+	LANGUAGE plpgsql EXTERNAL SECURITY DEFINER;
+REVOKE ALL ON FUNCTION valid_vend_slot(varchar(2)) FROM public;
+GRANT EXECUTE ON FUNCTION vend_failed(integer) TO vendserver;
 
 CREATE OR REPLACE FUNCTION valid_vend_slot(varchar(2)) RETURNS boolean AS
 	'SELECT $1 ~ ''^[0-9]{2}$''' LANGUAGE SQL EXTERNAL SECURITY DEFINER;
@@ -552,10 +579,13 @@ REVOKE ALL ON FUNCTION update_vend_slot_info(varchar(2), varchar, integer, integ
 
 CREATE OR REPLACE FUNCTION vend_slot(integer, varchar(2)) RETURNS void AS
 	'
-	elog(NOTICE, q(And out pops a snack!));
-	INSERT INTO vend_requests VALUES ($1, $2);
-	NOTIFY vend_requests;
-	' LANGUAGE plperlu EXTERNAL SECURITY DEFINER;
+	BEGIN
+		RAISE NOTICE ''And out pops a snack'';
+		INSERT INTO vend_requests (request_id, request_slot) VALUES ($1, $2);
+		NOTIFY vend_requests;
+		RETURN;
+	END;
+	' LANGUAGE plpgsql EXTERNAL SECURITY DEFINER;
 REVOKE ALL ON FUNCTION vend_slot(integer, varchar(2)) FROM public;
 
 CREATE OR REPLACE FUNCTION vend_slot_trigger() RETURNS "trigger" AS