From: Nahuel Angelinetti <[email protected]>

At the moment when you renew a document the date_due calculated is 
now+loanlength, but it's a bad thing, It should be
date_due+loanlength.
This patch do change Circulation.pm to use the date_due as renew base and add 
the loanlength to get the new date_due after
renewal.

Signed-off-by: Henri-Damien LAURENT <[email protected]>
---
 C4/Circulation.pm |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/C4/Circulation.pm b/C4/Circulation.pm
index 5c136b2..ff3af6a 100644
--- a/C4/Circulation.pm
+++ b/C4/Circulation.pm
@@ -1976,6 +1976,22 @@ sub AddRenewal {
     my $issuedata = $sth->fetchrow_hashref;
     $sth->finish;
 
+    # If the due date wasn't specified, calculate it by adding the
+    # book's loan length to due's date.
+    unless (@_ and $datedue = shift and $datedue->output('iso')) {
+
+        my $borrower = C4::Members::GetMemberDetails( $borrowernumber, 0 ) or 
return undef;
+        my $loanlength = GetLoanLength(
+            $borrower->{'categorycode'},
+             (C4::Context->preference('item-level_itypes')) ? 
$biblio->{'itype'} : $biblio->{'itemtype'} ,
+                       $item->{homebranch}                     # item's 
homebranch determines loanlength OR do we want the branch specified by the 
AddRenewal argument?
+        );
+
+        #FIXME -- use circControl?
+        $datedue =  CalcDateDue(C4::Dates->new($issuedata->{date_due}, 
'iso'),$loanlength,$branch);    # this branch is the transactional branch.
+        # The question of whether to use item's homebranch calendar is open.
+    }
+
     # Update the issues record to have the new due date, and a new count
     # of how many times it has been renewed.
     my $renews = $issuedata->{'renewals'} + 1;
-- 
1.5.6.3

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