Limit Quantity to Spots Left
Once a time slot is chosen, disable the Quantity choices that are larger than the spots left in that slot. For example, with choices 1 to 4 and 3 spots left, 4 is disabled. A Number quantity input gets a matching maximum instead.
Instructions
- Install this snippet by following the steps here: https://gravitywiz.com/documentation/how-do-i-install-a-snippet/
Code
Filename: gpb-limit-qty-to-spots-left.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
<?php
/**
* Gravity Perks // Bookings // Limit Quantity to Spots Left
* https://gravitywiz.com/documentation/gravity-forms-bookings/
*
* Once a time slot is chosen, disable the Quantity choices that are larger than the
* spots left in that slot. For example, with choices 1 to 4 and 3 spots left, 4 is
* disabled. A Number quantity input gets a matching maximum instead.
*
* Instructions:
*
* 1. Install this snippet by following the steps here:
* https://gravitywiz.com/documentation/how-do-i-install-a-snippet/
*/
class GPB_Limit_Quantity_To_Spots_Left {
public function __construct() {
add_action( 'gform_register_init_scripts', array( $this, 'register_init_script' ) );
}
public function register_init_script( $form ) {
$fields = array();
foreach ( GFAPI::get_fields_by_type( $form, 'gpb_booking_time' ) as $field ) {
if ( empty( $field->gpbBookingField ) ) {
continue;
}
$quantity_fields = GFCommon::get_product_fields_by_type( $form, array( 'quantity' ), $field->gpbBookingField );
if ( $quantity_fields ) {
$fields[ (int) $field->id ] = (int) $quantity_fields[0]->id;
}
}
if ( empty( $fields ) ) {
return;
}
$args = array(
'formId' => (int) $form['id'],
'fields' => $fields,
'restUrl' => rest_url( 'gp-bookings/v1/availability/range' ),
);
$script = '( ' . $this->get_script() . ' )( ' . wp_json_encode( $args ) . ' );';
GFFormDisplay::add_init_script( $form['id'], 'gpb_limit_quantity_to_spots_left', GFFormDisplay::ON_PAGE_RENDER, $script );
}
private function get_script() {
return <<<'JS'
function ( args ) {
var $ = window.jQuery;
$.each( args.fields, function ( timeFieldId, quantityFieldId ) {
var booking = window.gpBookings && window.gpBookings[ args.formId + '_' + timeFieldId ];
var $time = $( '#input_' + args.formId + '_' + timeFieldId );
var $quantity = $( '#input_' + args.formId + '_' + quantityFieldId ).not( '[type="hidden"]' );
var lastKey = null;
if ( ! booking || ! booking.store ) {
return;
}
var ownMax = $quantity.data( 'gpbOwnMax' );
if ( ownMax === undefined ) {
ownMax = parseFloat( $quantity.attr( 'max' ) ) || Infinity;
$quantity.data( 'gpbOwnMax', ownMax );
}
function update() {
var state = booking.store.getState();
var data = {
serviceId: state.currentServiceId,
start: $time.val(),
end: $time.val(),
resources: state.selectedResourceIds,
resourceMode: state.resourceMode
};
if ( booking.excludeBookingId ) {
data.excludeBookingId = booking.excludeBookingId;
data.excludeBookingToken = booking.excludeBookingToken;
}
var key = JSON.stringify( data );
if ( key === lastKey ) {
return;
}
lastKey = key;
if ( ! data.start || ! data.serviceId ) {
limitQuantity( -1 );
return;
}
$.getJSON( args.restUrl, data ).done( function ( reply ) {
if ( key === lastKey ) {
limitQuantity( reply.remainingSlots );
}
} );
}
function limitQuantity( remaining ) {
var max = remaining < 0 ? Infinity : remaining;
if ( $quantity.is( 'select' ) ) {
$quantity.find( 'option' ).prop( 'disabled', function () {
return parseInt( this.value, 10 ) > max;
} );
if ( $quantity.find( 'option:selected' ).prop( 'disabled' ) ) {
$quantity.val( $quantity.find( 'option:enabled' ).last().val() ).trigger( 'change' );
}
$quantity.trigger( 'chosen:updated' );
return;
}
var limit = Math.min( ownMax, max );
$quantity.attr( 'max', limit === Infinity ? null : limit );
if ( parseFloat( $quantity.val() ) > limit ) {
$quantity.val( limit ).trigger( 'change' );
}
}
$time.off( '.gpbLimitQty' ).on( 'change.gpbLimitQty', update );
booking.store.subscribe( update );
update();
} );
}
JS;
}
}
new GPB_Limit_Quantity_To_Spots_Left();