From 3276471c5d18f1fb1cbba7308087340dcd2a14fd Mon Sep 17 00:00:00 2001
From: Tomas Cohen Arazi <tomascohen@theke.io>
Date: Mon, 10 Dec 2018 16:45:00 -0300
Subject: [PATCH] Bug 21759: Avoid manually setting amountoutstanding in
 _FixAccountForLostAndReturned

This patch changes the behaviour in the _FixAccountForLostAndFound
method.

The method will now add the amountoutstanding value for the lost item
fee to the CR credit to be generated. This means that:
- If there's some remaining debt, the same amount  will be added to the
  CR credit and used to cancel that debt. The final amountoutstanding
  will be the same as before, but an offset will be generated as
  required.
- If the line was written off, the behaviour remains unchanged, so no
  offset.
- If the line was payed and/or written off in full only the payments are
  refund, preserving the current behaviour.

To test:
- Apply the regression tests patch
- Run:
  $ kshell
 k$ prove t/db_dependent/Circulation.t
=> FAIL: Tests fail because the behaviour is not correct
- Apply this patch
- Run:
 k$ prove t/db_dependent/Circulation.t
=> SUCCESS: Tests now pass!
- Sign off :-D

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
---
 C4/Circulation.pm | 46 ++++++++++++++++++++++++----------------------
 1 file changed, 24 insertions(+), 22 deletions(-)

diff --git a/C4/Circulation.pm b/C4/Circulation.pm
index 0999a970fd..67a0e9a757 100644
--- a/C4/Circulation.pm
+++ b/C4/Circulation.pm
@@ -2404,12 +2404,14 @@ sub _FixAccountForLostAndReturned {
     );
 
     return unless $accountlines->count > 0;
-    my $accountline = $accountlines->next;
+    my $accountline     = $accountlines->next;
+    my $total_to_refund = 0;
+    my $account = Koha::Patrons->find( $accountline->borrowernumber )->account;
 
     # Use cases
     if ( $accountline->amount > $accountline->amountoutstanding ) {
         # some amount has been cancelled. collect the offsets that are not writeoffs
-        # this works because the only way to subtract from a debt is
+        # this works because the only way to subtract from this kind of a debt is
         # using the UI buttons 'Pay' and 'Write off'
         my $credits_offsets = Koha::Account::Offsets->search({
             debit_id  => $accountline->id,
@@ -2418,30 +2420,30 @@ sub _FixAccountForLostAndReturned {
             amount    => { '<'  => 0 } # credits are negative on the DB
         });
 
-        my $total_to_refund = ( $credits_offsets->count > 0 )
-                                ? $credits_offsets->total * -1 # credits are negative on the DB
-                                : 0;
+        $total_to_refund = ( $credits_offsets->count > 0 )
+                            ? $credits_offsets->total * -1 # credits are negative on the DB
+                            : 0;
+    }
 
-        if ( $total_to_refund > 0 ) {
-            my $account = Koha::Patrons->find( $accountline->borrowernumber )->account;
-            $credit = $account->add_credit(
-                {
-                    amount      => $total_to_refund,
-                    description => 'Item Returned ' . $item_id,
-                    type        => 'lost_item_return'
-                }
-            );
-        }
+    my $credit_total = $accountline->amountoutstanding + $total_to_refund;
 
-        ModItem( { paidfor => '' }, undef, $itemnumber, { log_action => 0 } );
+    if ( $credit_total > 0 ) {
+        $credit = $account->add_credit(
+            {   amount      => $credit_total,
+                description => 'Item Returned ' . $item_id,
+                type        => 'lost_item_return'
+            }
+        );
+
+        # TODO: ->apply should just accept the accountline
+        $credit->apply( { debits => $accountlines->reset } );
     }
-    # else {
-        # $accountline->amount == $accountline->amountoutstanding
-    #}
 
-    $accountline->accounttype('LR');
-    $accountline->amountoutstanding(0);
-    $accountline->store();
+    # Manually set the accounttype
+    $accountline->discard_changes->accounttype('LR');
+    $accountline->store;
+
+    ModItem( { paidfor => '' }, undef, $itemnumber, { log_action => 0 } );
 
     return ($credit) ? $credit->id : undef;
 }
-- 
2.19.2