How to prevent duplicate entries in Gravity Forms within specific dates - php

Question

I am trying to prevent duplicate entries for 2 of my Gravity Forms. I need to prevent these entries only within a certain timeframe and based on certain fields like 'email' or 'address'. So if they have an entry with the same 'email' prior to the start_date, they can still submit the form without issue. If they have an entry with the same 'email' after the start_date and before the end_date then they won't be able to submit the form. The code below is what I currently have in place, but it isn't working. Any help is greatly appreciated.
add_filter( 'gform_is_duplicate', 'custom_duplicate_entry_rules', 10, 4 );
function custom_duplicate_entry_rules( $count, $form_id, $field, $value ) {
$form_id = array( 6,61 );
$search_criteria = array(
'start_date' => 2021-02-01, // Get entries from date after last event
'end_date' => 2022-01-20, // Up to right before next event
'field_filters' => array( // which fields to search
array(
'key' => 'email',
)
)
);
$search_past_entries = GFAPI::count_entries($form_id, $search_criteria);
if ( $search_past_entries >= '1' ) {
echo 'You have already signed up.';
}
}

Answer 1

I managed to get this figured out with the help of a fellow developer...
add_filter( 'gform_is_duplicate_6', 'custom_duplicate_entry_rules', 10, 4 );
add_filter( 'gform_is_duplicate_61', 'custom_duplicate_entry_rules', 10, 4 );
function custom_duplicate_entry_rules( $count, $form_id, $field, $value ) {
$search_criteria = array(
'start_date' => '2021-02-01', // Get entries from date after last event
'end_date' => '2022-01-20', // Up to right before next event
'field_filters' => array( // which fields to search
array(
'key' => 2,
'value' => $value,
)
)
);
$count = GFAPI::count_entries( $form_id, $search_criteria );
if( $count >= 1 ) {
return $count;
} else {
return 0;
}
}
I needed to zero in on the specific entry meta in field_filters which in this case ended up being 2, for the email address (this is the field ID in Gravity Forms). Lastly, I changed the if statement to return $count or 0. Gravity Forms does all the heavy lifting beyond that.