Subscribe2 Shortcode

function widget_shortcode( $atts ) {
		$args = shortcode_atts(
			array(
				'hide'       => '',
				'id'         => '',
				'nojs'       => 'false',
				'noantispam' => 'false',
				'link'       => '',
				'size'       => 20,
				'wrap'       => 'true',
				'widget'     => 'false',
			),
			$atts
		);

		// If link is true return a link to the page with the ajax class.
		if ( '1' === $this->subscribe2_options['ajax'] && '' !== $args['link'] && ! is_user_logged_in() ) {
			$id = '';
			foreach ( $args as $arg_name => $arg_value ) {
				if ( ! empty( $arg_value ) && 'link' !== $arg_name && 'id' !== $arg_name ) {
					if ( 'nojs' === $arg_name ) {
						$arg_value = 'true';
					}
					( '' === $id ) ? $id .= $arg_name . '-' . $arg_value : $id .= ':' . $arg_name . '-' . $arg_value;
				}
			}
			$this->s2form = '<a href="#" class="s2popup" id="' . esc_attr( $id ) . '">' . esc_html( $args['link'] ) . '</a>' . "\r\n";
			return $this->s2form;
		}

		// Apply filters to button text.
		$unsubscribe_button_value = apply_filters( 's2_unsubscribe_button', __( 'Unsubscribe', 'subscribe2' ) );
		$subscribe_button_value   = apply_filters( 's2_subscribe_button', __( 'Subscribe', 'subscribe2' ) );

		// If a button is hidden, show only other.
		$hide = strtolower( $args['hide'] );
		if ( 'subscribe' === $hide ) {
			$this->input_form_action = '<input type="submit" name="unsubscribe" value="' . esc_attr( $unsubscribe_button_value ) . '" />';
		} elseif ( 'unsubscribe' === $hide ) {
			$this->input_form_action = '<input type="submit" name="subscribe" value="' . esc_attr( $subscribe_button_value ) . '" />';
		} else {
			// Both form input actions.
			$this->input_form_action = '<input type="submit" name="subscribe" value="' . esc_attr( $subscribe_button_value ) . '" />&nbsp;<input type="submit" name="unsubscribe" value="' . esc_attr( $unsubscribe_button_value ) . '" />';
		}

		// If ID is provided, get permalink.
		$action = '';
		if ( is_numeric( $args['id'] ) ) {
			$action = ' action="' . get_permalink( $args['id'] ) . '"';
		} elseif ( 'home' === $args['id'] ) {
			$action = ' action="' . get_site_url() . '"';
		} elseif ( 'self' === $args['id'] ) {
			// Correct for Static front page redirect behaviour
			if ( 'page' === get_option( 'show_on_front' ) && is_front_page() ) {
				$post   = get_post( get_option( 'page_on_front' ) );
				$action = ' action="' . get_option( 'home' ) . '/' . $post->post_name . '/"';
			} else {
				$action = '';
			}
		} elseif ( $this->subscribe2_options['s2page'] > 0 ) {
			$action = ' action="' . get_permalink( $this->subscribe2_options['s2page'] ) . '"';
		}

		// Allow remote setting of email in form.
		$email = ! empty( $_REQUEST['email'] ) ? sanitize_email( $_REQUEST['email'] ) : '';
		if ( ! empty( $email ) && false !== $this->validate_email( $email ) ) {
			$value = $email;
		} elseif ( 'true' === strtolower( $args['nojs'] ) ) {
			$value = '';
		} else {
			$value = __( 'Enter email address...', 'subscribe2' );
		}

		// If wrap is true add paragraph html tags.
		$wrap_text = '';
		if ( 'true' === strtolower( $args['wrap'] ) ) {
			$wrap_text = '</p><p>';
		}

		// Deploy some anti-spam measures.
		$antispam_text = '';
		if ( 'true' !== strtolower( $args['noantispam'] ) ) {
			$antispam_text  = '<span style="display:none !important">';
			$antispam_text .= '<label for="firstname">' . __( 'Leave This Blank:', 'subscribe2' ) . '</label><input type="text" id="firstname" name="firstname" />';
			$antispam_text .= '<label for="lastname">' . __( 'Leave This Blank Too:', 'subscribe2' ) . '</label><input type="text" id="lastname" name="lastname" />';
			$antispam_text .= '<label for="uri">' . __( 'Do Not Change This:', 'subscribe2' ) . '</label><input type="text" id="uri" name="uri" value="http://" />';
			$antispam_text .= '</span>';
		}

		// Form name.
		if ( 'true' === $args['widget'] ) {
			$form_name = 's2formwidget';
		} else {
			$form_name = 's2form';
		}

		// Build default form.
		if ( 'true' === strtolower( $args['nojs'] ) ) {
			$this->form = '<form name="' . $form_name . '" method="post"' . $action . '><input type="hidden" name="ip" value="' . esc_attr( $_SERVER['REMOTE_ADDR'] ) . '" />' . $antispam_text . '<p><label for="s2email">' . __( 'Your email:', 'subscribe2' ) . '</label><br><input type="email" name="email" id="s2email" value="' . esc_attr( $value ) . '" size="' . esc_attr( $args['size'] ) . '" />' . $wrap_text . $this->input_form_action . '</p></form>';
		} else {
			$this->form = '<form name="' . $form_name . '" method="post"' . $action . '><input type="hidden" name="ip" value="' . esc_attr( $_SERVER['REMOTE_ADDR'] ) . '" />' . $antispam_text . '<p><label for="s2email">' . __( 'Your email:', 'subscribe2' ) . '</label><br><input type="email" name="email" id="s2email" value="' . esc_attr( $value ) . '" size="' . esc_attr( $args['size'] ) . '" onfocus="if (this.value === \'' . $value . '\') {this.value = \'\';}" onblur="if (this.value === \'\') {this.value = \'' . $value . '\';}" />' . $wrap_text . $this->input_form_action . '</p></form>' . "\r\n";
		}
		$this->s2form = apply_filters( 's2_form', $this->form, $args );

        if ( is_user_logged_in() ) {
            return $this->profile;
        }

		// Anti spam sign up measure.
		if ( isset( $_POST['subscribe'] ) || isset( $_POST['unsubscribe'] ) ) {
			if ( ! empty( $_POST['firstname'] ) || ! empty( $_POST['lastname'] ) || ( ! empty( $_POST['uri'] ) && 'http://' !== sanitize_url( $_POST['uri'] ) ) ) {
				// Looks like some invisible-to-user fields were changed; falsely report success.
				return $this->confirmation_sent;
			}

			$validation = apply_filters( 's2_form_submission', true );
			if ( ! $validation ) {
				return apply_filters( 's2_form_failed_validation', $this->s2form );
			}

			global $wpdb;
			$this->email = sanitize_email( $_POST['email'] );
			if ( false === $this->validate_email( $this->email ) ) {
				$this->s2form = $this->s2form . $this->not_an_email;
			} elseif ( $this->is_barred( $this->email ) ) {
				$this->s2form = $this->s2form . $this->barred_domain;
			} else {
				$this->ip = $_POST['ip'];
				if ( is_int( $this->lockout ) && $this->lockout > 0 ) {
					$date = current_datetime( $this->lockout )->format( 'H:i:s.u' );
					$ips  = $wpdb->get_col(
						$wpdb->prepare(
							"SELECT ip FROM $wpdb->subscribe2 WHERE date = CURDATE() AND time > SUBTIME(CURTIME(), %s)",
							$date
						)
					);

					if ( in_array( $this->ip, $ips, true ) ) {
						return __( 'Slow down, you move too fast.', 'subscribe2' );
					}
				}

				// Does the supplied email belong to a registered user?
				$check = $wpdb->get_var(
					$wpdb->prepare(
						"SELECT user_email FROM $wpdb->users WHERE user_email = %s",
						$this->email
					)
				);

				if ( null !== $check ) {
					// This is a registered email.
					$this->s2form = $this->please_log_in;
				} else {
					// This is not a registered email.
					// What should we do?
					if ( isset( $_POST['subscribe'] ) ) {
						// Someone is trying to subscribe.
						// Let's see if they've tried to subscribe previously.
						if ( '1' !== $this->is_public( $this->email ) ) {
							// The user is unknown or inactive.
							$this->add( $this->email );
							$status = $this->send_confirm( 'add' );
							// Set a variable to denote that we've already run, and shouldn't run again.
							$this->filtered = 1;

							if ( $status ) {
								$this->s2form = $this->confirmation_sent;
							} else {
								$this->s2form = $this->error;
							}
						} else {
							// They're already subscribed.
							$this->s2form = $this->already_subscribed;
						}

						$this->action = 'subscribe';
					} elseif ( isset( $_POST['unsubscribe'] ) ) {
						// Is this email a subscriber?
						if ( false === $this->is_public( $this->email ) ) {
							$this->s2form = $this->s2form . $this->not_subscribed;
						} else {
							$status = $this->send_confirm( 'del' );
							// Set a variable to denote that we've already run, and shouldn't run again.
							$this->filtered = 1;
							if ( $status ) {
								$this->s2form = $this->confirmation_sent;
							} else {
								$this->s2form = $this->error;
							}
						}

						$this->action = 'unsubscribe';
					}
				}
			}
		}

		return $this->s2form;
	}