bp_get_group_join_button( object|bool $group = false )

	function bp_get_group_join_button( $group = false ) {
		global $groups_template;

		// Set group to current loop group if none passed.
		if ( empty( $group ) ) {
			$group =& $groups_template->group;
		}

		// Don't show button if not logged in or previously banned.
		if ( ! is_user_logged_in() || bp_group_is_user_banned( $group ) ) {
			return false;
		}

		// Group creation was not completed or status is unknown.
		if ( empty( $group->status ) ) {
			return false;
		}

		// Already a member.
		if ( ! empty( $group->is_member ) ) {

		    $is_only_admin = false;
			// Stop sole admins from abandoning their group.
			$group_admins = groups_get_group_admins( $group->id );
			if ( ( 1 == count( $group_admins ) ) && ( bp_loggedin_user_id() === (int) $group_admins[0]->user_id ) ) {
				$is_only_admin = true;
			}

			if ( groups_is_user_admin( bp_loggedin_user_id(), $group->id ) ) {
				if ( 'Organizer' === get_group_role_label( $group->id, 'organizer_singular_label_name') ) {
					$button_text = __( 'You\'re an ' . get_group_role_label( $group->id, 'organizer_singular_label_name'), 'buddyboss' );
				} else {
					$button_text = __( 'You\'re a ' . get_group_role_label( $group->id, 'organizer_singular_label_name'), 'buddyboss' );
				}
			} elseif ( groups_is_user_mod( bp_loggedin_user_id(), $group->id ) ) {
				$button_text = __( 'You\'re a ' . get_group_role_label( $group->id, 'moderator_singular_label_name'), 'buddyboss' );
			} else {
				$button_text = __( 'You\'re a ' . get_group_role_label( $group->id, 'member_singular_label_name'), 'buddyboss' );
			}

			// Setup button attributes.
			$button = array(
				'id'                => 'leave_group',
				'component'         => 'groups',
				'must_be_logged_in' => true,
				'block_self'        => false,
				'wrapper_class'     => 'group-button ' . $group->status,
				'wrapper_id'        => 'groupbutton-' . $group->id,
				'link_href'         => wp_nonce_url( trailingslashit( bp_get_group_permalink( $group ) . 'leave-group' ), 'groups_leave_group' ),
				'link_text'         => $button_text,
				'link_class'        => 'group-button leave-group bp-toggle-action-button',
				'button_attr' => array(
					'data-title'           => __( 'Leave group', 'buddyboss' ),
					'data-title-displayed' => $button_text
				)
			);

			if ( $is_only_admin ) {
			    $button['button_attr']['data-only-admin'] = '1';
            }

		// Not a member.
		} else {

			// Show different buttons based on group status.
			switch ( $group->status ) {
				case 'hidden' :
					return false;

				case 'public':
					$button = array(
						'id'                => 'join_group',
						'component'         => 'groups',
						'must_be_logged_in' => true,
						'block_self'        => false,
						'wrapper_class'     => 'group-button ' . $group->status,
						'wrapper_id'        => 'groupbutton-' . $group->id,
						'link_href'         => wp_nonce_url( trailingslashit( bp_get_group_permalink( $group ) . 'join' ), 'groups_join_group' ),
						'link_text'         => __( 'Join group', 'buddyboss' ),
						'link_class'        => 'group-button join-group',
					);
					break;

				case 'private' :

					// Member has outstanding invitation -
					// show an "Accept Invitation" button.
					if ( $group->is_invited ) {
						$button = array(
							'id'                => 'accept_invite',
							'component'         => 'groups',
							'must_be_logged_in' => true,
							'block_self'        => false,
							'wrapper_class'     => 'group-button ' . $group->status,
							'wrapper_id'        => 'groupbutton-' . $group->id,
							'link_href'         => add_query_arg( 'redirect_to', bp_get_group_permalink( $group ), bp_get_group_accept_invite_link( $group ) ),
							'link_text'         => __( 'Accept Invitation', 'buddyboss' ),
							'link_class'        => 'group-button accept-invite',
						);

					// Member has requested membership but request is pending -
					// show a "Request Sent" button.
					} elseif ( $group->is_pending ) {
						$button = array(
							'id'                => 'membership_requested',
							'component'         => 'groups',
							'must_be_logged_in' => true,
							'block_self'        => false,
							'wrapper_class'     => 'group-button pending ' . $group->status,
							'wrapper_id'        => 'groupbutton-' . $group->id,
							'link_href'         => bp_get_group_permalink( $group ),
							'link_text'         => __( 'Request Sent', 'buddyboss' ),
							'link_class'        => 'group-button pending membership-requested',
						);

					// Member has not requested membership yet -
					// show a "Request Membership" button.
					} else {

						if ( true === bp_member_type_enable_disable() && true === bp_disable_group_type_creation() ) {

							$group_type = bp_groups_get_group_type( $group->id );

							$group_type_id = bp_get_group_type_post_id( $group_type );

							$get_selected_member_type_join = get_post_meta( $group_type_id, '_bp_group_type_enabled_member_type_join', true );

							$get_selected_member_type_join = ( isset( $get_selected_member_type_join ) && !empty( $get_selected_member_type_join ) ) ? $get_selected_member_type_join : array();

							$get_requesting_user_member_type = bp_get_member_type( bp_loggedin_user_id() );

							if ( in_array( $get_requesting_user_member_type, $get_selected_member_type_join ) ) {
								$button = array(
									'id'                => 'request_membership',
									'component'         => 'groups',
									'must_be_logged_in' => true,
									'block_self'        => false,
									'wrapper_class'     => 'group-button ' . $group->status,
									'wrapper_id'        => 'groupbutton-' . $group->id,
									'link_href'         => wp_nonce_url( trailingslashit( bp_get_group_permalink( $group ) . 'request-membership' ), 'groups_request_membership' ),
									'link_text'         => __( 'Join group', 'buddyboss' ),
									'link_class'        => 'group-button request-membership',
								);
							} else {
								$button = array(
									'id'                => 'request_membership',
									'component'         => 'groups',
									'must_be_logged_in' => true,
									'block_self'        => false,
									'wrapper_class'     => 'group-button ' . $group->status,
									'wrapper_id'        => 'groupbutton-' . $group->id,
									'link_href'         => wp_nonce_url( trailingslashit( bp_get_group_permalink( $group ) . 'request-membership' ), 'groups_request_membership' ),
									'link_text'         => __( 'Request Access', 'buddyboss' ),
									'link_class'        => 'group-button request-membership',
								);
							}

						} else {
							$button = array(
								'id'                => 'request_membership',
								'component'         => 'groups',
								'must_be_logged_in' => true,
								'block_self'        => false,
								'wrapper_class'     => 'group-button ' . $group->status,
								'wrapper_id'        => 'groupbutton-' . $group->id,
								'link_href'         => wp_nonce_url( trailingslashit( bp_get_group_permalink( $group ) . 'request-membership' ), 'groups_request_membership' ),
								'link_text'         => __( 'Request Access', 'buddyboss' ),
								'link_class'        => 'group-button request-membership',
							);
						}
					}

					break;
			}
		}

		/**
		 * Filters the HTML button for joining a group.
		 *
		 * @since BuddyPress 1.2.6
		 * @since BuddyPress 2.4.0 Added $group parameter to filter args.
		 *
		 * @param string $button HTML button for joining a group.
		 * @param object $group BuddyPress group object
		 */
		return bp_get_button( apply_filters( 'bp_get_group_join_button', $button, $group ) );
	}