Ensure that acknowledgement checkbox is enforced before importing group members.

See cuny-academic-commons/commons-in-a-box#506, cuny-academic-commons/commons-in-a-box#549.

Author: boonebgorges

functions.php

@@ -251,6 +251,14 @@ function openlab_load_scripts() {
 				$ver,
 				true
 			);
+
+			wp_enqueue_script(
+				'openlab-invitations',
+				$stylesheet_dir_uri . '/js/invitations.js',
+				[ 'jquery' ],
+				$ver,
+				true
+			);
 		}
 	}
 }

js/invitations.js

@@ -0,0 +1,31 @@
+(function($){
+	var $acknowledgeCheckbox,
+	  $importMembersAddresses,
+	  $importMembersSubmit;
+
+	var updateForm = function() {
+		var isAcknowleged = $acknowledgeCheckbox.is(':checked');
+		var hasAddresses  = $importMembersAddresses.val().length > 0;
+
+		if ( isAcknowleged && hasAddresses ) {
+			$importMembersSubmit.prop('disabled', false);
+		} else {
+			$importMembersSubmit.prop('disabled', 'disabled');
+		}
+	}
+
+	$(document).ready(function(){
+		$acknowledgeCheckbox = $('#import-acknowledge-checkbox');
+		$importMembersAddresses = $('#email-addresses-to-import');
+		$importMembersSubmit = $('#import-members-form input[type="submit"]');
+
+		if ( $importMembersAddresses.length === 0 ) {
+			return;
+		}
+
+		updateForm();
+
+		$acknowledgeCheckbox.on('change', updateForm);
+		$importMembersAddresses.on('change keyup', updateForm);
+	});
+}(jQuery));