`gw-require-unique-values.php`: Added support to required unique inputs for name field type.

[barthc]

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Context

⛑️ Ticket(s): https://secure.helpscout.net/conversation/2583004576/65519

Summary

Added support to required unique inputs for name field type. Original request was specifying the inputs id,(not sure if the user can specify the input ids correctly as they are not visible on the editor) but trying to keep it simple by requiring unique value for all inputs.

[github-actions[bot]]

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[barthc]

add_filter( sprintf( 'gform_field_validation_%s', $this->_args['form_id'] ), array( $this, 'validate' ), 10, 4 );
add_filter( sprintf( 'gform_field_validation_%s', $this->_args['form_id'] ), array( $this, 'validate_field_input' ), 11, 4 );

@claygriffiths The first filter will support 'field_ids' => array( 1.3, 1.6, 2 ), // able to mix inputs and regular fields while the second filter will support 'field_ids' => array( 1.3, 1.6 ),