- added select2 dropdown with users list;

includes/admin/assets/js/um-admin-forms.js

@@ -1,5 +1,52 @@
-jQuery(document).ready( function() {
+function um_admin_init_users_select() {
+	if ( jQuery('.um-user-select-field').length ) {
+		var select2_atts = {
+			ajax: {
+				url: wp.ajax.settings.url,
+				dataType: 'json',
+				delay: 250, // delay in ms while typing when to perform a AJAX search
+				data: function( params ) {
+					return {
+						search: params.term, // search query
+						action: 'um_get_users', // AJAX action for admin-ajax.php
+						page: params.page || 1, // infinite scroll pagination
+						nonce: um_admin_scripts.nonce
+					};
+				},
+				processResults: function( response, params ) {
+					params.page = params.page || 1;
+					var options = [];
 
+					if ( response.data.users ) {
+						jQuery.each( response.data.users, function( index, text ) {
+							options.push( { id: text.ID, text: text.user_login + ' (#' + text.ID + ')' } );
+						});
+					}
+
+					return {
+						results: options,
+						pagination: {
+							more: ( params.page * 20 ) < response.data.total_count
+						}
+					};
+				},
+				cache: true
+			},
+			minimumInputLength: 0, // the minimum of symbols to input before perform a search
+			allowClear: true,
+			width: "100%",
+			allowHtml: true,
+			dropdownCssClass: 'um-select2-users-dropdown',
+			containerCssClass : 'um-select2-users-container'
+		};
+
+		jQuery('.um-user-select-field').select2( select2_atts );
+	}
+}
+
+
+jQuery(document).ready( function() {
+	um_admin_init_users_select();
 
 	/**
 	 * Same page upgrade field

includes/admin/core/class-admin-ajax-hooks.php

@@ -30,7 +30,9 @@ if ( ! class_exists( 'um\admin\core\Admin_Ajax_Hooks' ) ) {
 			add_action( 'wp_ajax_um_member_directory_default_filter_settings', array( UM()->member_directory(), 'default_filter_settings' ) );
 
 			add_action( 'wp_ajax_um_same_page_update', array( UM()->admin_settings(), 'same_page_update_ajax' ) );
+
+			add_action( 'wp_ajax_um_get_users', array( UM()->users(), 'get_users' ) );
 		}
 
 	}
-}
+}

includes/admin/core/class-admin-forms.php

@@ -548,6 +548,69 @@ if ( ! class_exists( 'um\admin\core\Admin_Forms' ) ) {
 		}
 
 
+		/**
+		 * @param $field_data
+		 *
+		 * @return bool|string
+		 */
+		function render_users_dropdown( $field_data ) {
+			if ( empty( $field_data['id'] ) ) {
+				return false;
+			}
+
+			$multiple = ! empty( $field_data['multi'] ) ? 'multiple' : '';
+
+			$id = ( ! empty( $this->form_data['prefix_id'] ) ? $this->form_data['prefix_id'] : '' ) . '_' . $field_data['id'];
+			$id_attr = ' id="' . esc_attr( $id ) . '" ';
+
+			$class = ! empty( $field_data['class'] ) ? $field_data['class'] . ' ' : ' ';
+			$class .= ! empty( $field_data['size'] ) ? 'um-' . $field_data['size'] . '-field' : 'um-long-field';
+			$class_attr = ' class="um-forms-field um-user-select-field' . esc_attr( $class ) . '" ';
+
+			$data = array(
+				'field_id' => $field_data['id'],
+			);
+
+			$data_attr = '';
+			foreach ( $data as $key => $value ) {
+				$data_attr .= ' data-' . $key . '="' . esc_attr( $value ) . '" ';
+			}
+
+			$name = $field_data['id'];
+			$name = ! empty( $this->form_data['prefix_id'] ) ? $this->form_data['prefix_id'] . '[' . $name . ']' : $name;
+			$hidden_name_attr = ' name="' . $name . '" ';
+			$name = $name . ( ! empty( $field_data['multi'] ) ? '[]' : '' );
+			$name_attr = ' name="' . $name . '" ';
+
+			$value = $this->get_field_value( $field_data );
+
+			$users = array();
+			if ( ! empty( $value ) ) {
+				$users = get_users(
+					array(
+						'include' => $value,
+						'fields'  => array( 'ID', 'user_login' ),
+					)
+				);
+			}
+
+			$options = '';
+			if ( ! empty( $users ) ) {
+				foreach ( $users as $user ) {
+					$options .= '<option value="' . esc_attr( $user->ID ) . '" selected>' . esc_html( $user->user_login ) . '</option>';
+				}
+			}
+
+			$hidden = '';
+			if ( ! empty( $multiple ) ) {
+				$hidden = "<input type=\"hidden\" $hidden_name_attr value=\"\" />";
+			}
+			$html = "$hidden<select $multiple $id_attr $name_attr $class_attr $data_attr><option value=\"\">" . esc_html__( 'Select Users', 'ultimate-member' ) . "</option>$options</select>";
+
+			return $html;
+		}
+
+
 		/**
 		 * @param $field_data
 		 *

includes/admin/core/class-admin-users.php

@@ -42,6 +42,36 @@ if ( ! class_exists( 'um\admin\core\Admin_Users' ) ) {
 		}
 
 
+		function get_users() {
+			UM()->admin()->check_ajax_nonce();
+
+			$search_request = ! empty( $_REQUEST['search'] ) ? sanitize_text_field( $_REQUEST['search'] ) : '';
+			$page           = ! empty( $_REQUEST['page'] ) ? absint( $_REQUEST['page'] ) : 1;
+			$per_page       = 20;
+
+			$args = array(
+				'fields' => array( 'ID', 'user_login' ),
+				'paged'  => $page,
+				'number' => $per_page
+			);
+
+			if ( ! empty( $search_request ) ) {
+				$args['search'] = $search_request;
+			}
+
+			$users_query = new \WP_User_Query( $args );
+			$users       = $users_query->get_results();
+			$total_count = $users_query->get_total();
+
+			wp_send_json_success(
+				array(
+					'users'       => $users,
+					'total_count' => $total_count,
+				)
+			);
+		}
+
+
 		/**
 		 * Restrict the edit/delete users via wp-admin screen by the UM role capabilities
 		 *