MT#3971 Add max_subscribers field.

This only happens when creating customers for now.

lib/NGCP/Panel/Controller/Contract.pm

@@ -460,6 +460,9 @@ sub customer_create :Chained('customer_list') :PathPart('create') :Args(0) {
                 unless($product_id) {
                     $product_id = $c->model('DB')->resultset('products')->find({ class => 'sipaccount' })->id;
                 }
+                unless($form->params->{max_subscribers} && length($form->params->{max_subscribers})) {
+                    delete $form->params->{max_subscribers};
+                }
                 my $contract = $schema->resultset('contracts')->create($form->params);
                 my $billing_profile = $schema->resultset('billing_profiles')->find($bprof_id);
                 $contract->billing_mappings->create({

lib/NGCP/Panel/Form/Contract/ProductSelect.pm

@@ -9,10 +9,21 @@ has_field 'product' => (
     not_nullable => 1,
 );
 
+has_field 'max_subscribers' => (
+    type => 'PosInteger',
+    label => 'Max Subscribers',
+    required => 0,
+    element_attr => {
+        rel => ['tooltip'],
+        title => ['Optionally set the maximum number of subscribers for this contract. Leave empty for unlimited.']
+    },
+);
+
+
 has_block 'fields' => (
     tag => 'div',
     class => [qw/modal-body/],
-    render_list => [qw/product contact billing_profile status external_id/],
+    render_list => [qw/contact billing_profile product max_subscribers status external_id/],
 );
 
 1;