Added a script which will notify individuals of short parts via email in

nearly real time


git-svn-id: https://ledger-smb.svn.sourceforge.net/svnroot/ledger-smb/trunk@56 4979c152-3d1c-0410-bac9-87ea11338e46

5 files changed, 373 insertions, 0 deletions

diff --git a/sql/Pg-upgrade-2.6.17-2.6.18.sql b/sql/Pg-upgrade-2.6.17-2.6.18.sql
index 65361cc9..4cf7c9e0 100644
--- a/sql/Pg-upgrade-2.6.17-2.6.18.sql
+++ b/sql/Pg-upgrade-2.6.17-2.6.18.sql
@@ -10,5 +10,27 @@ CREATE SEQUENCE acctrans_entry_id_seq;
 ALTER TABLE acc_trans ALTER COLUMN entry_id SET DEFAULT nextval('acctrans_entry_id_seq');
 UPDATE acc_trans SET entry_id = nextval('acctrans_entry_id_seq');
 ALTER TABLE acc_trans ADD PRIMARY key (entry_id);
+
+
+-- The query rewrite rule necessary to notify the email app that a new report
+-- needs to be sent to the designated administrator.
+-- By Chris Travers
+-- chris@metatrontech.com
+-- Licensed under the GNU GPL 2.0 or later at your option.  See accompanying
+-- GPL.txt
+
+CREATE OR REPLACE FUNCTION trigger_parts_short() RETURNS TRIGGER
+AS
+'
+BEGIN
+  IF NEW.onhand >= NEW.rop THEN
+    NOTIFY parts_short;
+  END IF;
+  RETURN NEW;
+END;
+' LANGUAGE PLPGSQL;
+
+CREATE TRIGGER parts_short AFTER UPDATE ON parts 
+FOR EACH ROW EXECUTE PROCEDURE trigger_parts_short();
 COMMIT;
 
diff --git a/utils/notify_short/GPL.txt b/utils/notify_short/GPL.txt
new file mode 100644
index 00000000..46c855ff
--- /dev/null
+++ b/utils/notify_short/GPL.txt
@@ -0,0 +1,235 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+                       59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
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+Foundation's software and to any other program whose authors commit to
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+the GNU Library General Public License instead.)  You can apply it to
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+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
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+
diff --git a/utils/notify_short/README b/utils/notify_short/README
new file mode 100644
index 00000000..267975f8
--- /dev/null
+++ b/utils/notify_short/README
@@ -0,0 +1,14 @@
+Short Parts Notifier for LedgerSMB
+By Chris Travers, Metatron Technology Consulting
+
+To use this software, edit the config.pl so that you can connect to the 
+database.  Then you can run listener.pl and it will periodically check to see
+if new there are parts that have become short through transactions.
+
+At the moment, the report is triggered when an AR or AP invoice occurs and a 
+part affected by the transaction is lower than the ROP.  When this happens, a
+Notify is sent from the database, and the application prepares the report on its
+next cycle.  Note that although the creation of a new part will not cause it to
+trigger the report, the new part will appear on the report on the next run.
+
+Any feedback, improvements, etc. are welcome.
diff --git a/utils/notify_short/config.pl b/utils/notify_short/config.pl
new file mode 100644
index 00000000..bd37bed1
--- /dev/null
+++ b/utils/notify_short/config.pl
@@ -0,0 +1,56 @@
+#!/usr/bin/perl
+
+use vars qw($email_to $cc_to $email_from $sendmail $database $db_user 
+	$db_passwd $template_head $template_foot);
+
+# The address to send the mail to.  On UNIX systems, multiple addresses can be
+# separated by a space.
+$email_to = 'manager@example';
+
+
+# The email address this email is from:
+$email_from = 'noreply@example';
+
+# The comamnd for sending the email:
+$sendmail = "sendmail -f$email_from $email_to";
+
+# The database containing SQL-Ledger
+$database = "ledger-smb";
+
+# The user to connect with.  This user only requires select permission to the
+# parts table.
+
+$db_user = "ls-short";
+
+# How long between checking for Notify events?  In seconds
+$cycle_delay = 60;
+
+# The password for the db user:
+$db_passwd = "mypasswd";
+
+$template_top =
+"From: $email_from
+Subject: Parts Short Notice
+
+Hi.  This is the SL-Short listener.  You are receiving this message because
+a recently issued invoice has reduced the number of onhand items to a level 
+below its re-order point (ROP).  Please see the below report for items currently
+at or below their ROP.
+
+Partnumber         Description                          Onhand    ROP
+---------------------------------------------------------------------
+";
+
+$template_foot = "
+Thank you for your attention.";
+
+format MAIL_TOP =
+Partnumber         Description                          Onhand    ROP
+---------------------------------------------------------------------
+.
+format MAIL =
+@<<<<<<<<<<<<<    @<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< @>>>>  @>>>>>
+$partnumber,      $description,                         $avail,$rop
+.
+1;
+
diff --git a/utils/notify_short/listener.pl b/utils/notify_short/listener.pl
new file mode 100644
index 00000000..37f31d38
--- /dev/null
+++ b/utils/notify_short/listener.pl
@@ -0,0 +1,46 @@
+#!/usr/bin/perl
+
+# This is the SL-Short listener.  It listens for the "parts_short" signal and
+# when the signal comes in, prepares a list of short parts to be sent to
+# at least one person.
+#
+# By Chris Travers, Metatron Technology Consulting
+# chris@metatrontech.com
+#
+# Released under the GNU GPL v2.0 or later.  See included GPL.txt for more 
+# information.
+
+require "config.pl";
+
+use DBI;
+my $dsn = "dbi:Pg:dbname=$database";
+my $dbh = DBI->connect($dsn, $db_user, $db_passwd, 
+	{ AutoCommit => 1,
+	PrintError => 0,
+	RaiseError => 1, }
+);
+
+my $sth;
+
+$dbh->do("LISTEN parts_short");
+while (1){ # loop infinitely
+  if ($dbh->func ('pg_notifies')){
+    &on_notify;
+  }
+  sleep $cycle_delay;
+}
+sub on_notify {
+  open (MAIL, "| $sendmail");
+  $sth = $dbh->prepare("
+	SELECT partnumber, description, onhand, rop FROM parts
+	WHERE onhand <= rop
+  ");
+  $sth->execute;
+  print MAIL $template_top;
+  while (($partnumber, $description, $avail, $rop) = $sth->fetchrow_array){
+    write MAIL;
+  }
+  print MAIL $template_foot;
+  close MAIL;
+}
+