podlove.php

<?php
/**
 * Plugin Name: Podlove Subscribe Button
 * Plugin URI:  https://wordpress.org/extend/plugins/podlove-subscribe-button/
 * Description: Brings the Podlove Subscribe Button to your WordPress installation.
 * Version:     1.3.11
 * Author:      Podlove
 * Author URI:  https://podlove.org
 * License:     MIT
 * License URI: license.txt
 * Text Domain: podlove-subscribe-button
 * Domain Path: /languages
 */

$correct_php_version = version_compare( phpversion(), "5.3", ">=" );

if ( ! $correct_php_version ) {
	printf( __( 'Podlove Subscribe Button Plugin requires %s or higher.<br>', 'podlove-subscribe-button' ), '<code>PHP 5.3</code>' );
	echo '<br />';
	printf( __( 'You are running %s', 'podlove-subscribe-button' ), '<code>PHP ' . phpversion() . '</code>' );
	exit;
}

// Constants
require('constants.php');
require('settings/buttons.php');
// Models
require('model/base.php');
require('model/button.php');
require('model/network_button.php');
// Table
require('settings/buttons_list_table.php');
// Media Types
require('media_types.php');
// Widget
require('widget.php');
// Version control
require('version.php');
// Helper functions
require('helper.php');

add_action( 'admin_menu', array( 'PodloveSubscribeButton', 'admin_menu') );
if ( is_multisite() )
	add_action( 'network_admin_menu', array( 'PodloveSubscribeButton', 'admin_network_menu') );

add_action( 'admin_init', array( 'PodloveSubscribeButton\Settings\Buttons', 'process_form' ) );
register_activation_hook( __FILE__, array( 'PodloveSubscribeButton', 'build_models' ) );

// Register Settings
add_action( 'admin_init', function () {
	$settings = array( 'size', 'autowidth', 'style', 'format', 'color' );

	foreach ( $settings as $setting ) {
		if ( 'autowidth' == $setting ) {
			$args = array(
				'sanitize_callback' => array( 'PodloveSubscribeButton', 'sanitize_settings' ),
			);
			register_setting( 'podlove-subscribe-button', 'podlove_subscribe_button_default_' . $setting, $args );
		} else {
			register_setting( 'podlove-subscribe-button', 'podlove_subscribe_button_default_' . $setting );
		}
	}
} );

add_shortcode( 'podlove-subscribe-button', array( 'PodloveSubscribeButton', 'shortcode' ) );

add_action( 'plugins_loaded', function () {
	load_plugin_textdomain( 'podlove-subscribe-button', false, dirname(plugin_basename( __FILE__)) . '/languages/');
} );

PodloveSubscribeButton::run();


class PodloveSubscribeButton {

	public static function run() {
		add_action( 'admin_enqueue_scripts', array( __CLASS__, 'enqueue_assets' ) );
	}

	public static function enqueue_assets( $hook ) {

		$pages = array( 'settings_page_podlove-subscribe-button', 'widgets.php' );

		if ( ! in_array( $hook, $pages )  ) {
			return;
		}

		// CSS Stylesheet
		wp_register_style( 'podlove-subscribe-button', plugin_dir_url( __FILE__ ) . 'style.css', false, '1.3.6' );
		wp_enqueue_style( 'podlove-subscribe-button' );

		// Admin JS
		wp_enqueue_style( 'wp-color-picker' );
		wp_register_script( 'podlove-subscribe-button-admin-tools', plugin_dir_url( __FILE__ ) . 'js/admin.js', array( 'jquery', 'wp-color-picker' ), '1.3.6' );

		$js_translations = array(
			'media_library' => __( 'Media Library', 'podlove-subscribe-button' ),
			'use_for'       => __( 'Use for Podcast Cover Art', 'podlove-subscribe-button' ),
		);
		wp_localize_script( 'podlove-subscribe-button-admin-tools', 'i18n', $js_translations );
		wp_enqueue_script( 'podlove-subscribe-button-admin-tools' );
	}

	public static function admin_menu() {
		add_options_page(
				'Podlove Subscribe Button Options',
				'Podlove Subscribe Button',
				'manage_options',
				'podlove-subscribe-button',
				array( 'PodloveSubscribeButton\Settings\Buttons', 'page')
			);
	}

	public static function admin_network_menu() {
		add_submenu_page(
				'settings.php',
				'Podlove Subscribe Button Options',
				'Podlove Subscribe Button',
				'manage_options',
				'podlove-subscribe-button',
				array( 'PodloveSubscribeButton\Settings\Buttons', 'page')
			);
	}

	public static function build_models() {
		// Build Databases
		\PodloveSubscribeButton\Model\Button::build();
		if ( is_multisite() )
			\PodloveSubscribeButton\Model\NetworkButton::build();

		// Set Button "default" values
		$default_values = array(
				'size' => 'big',
				'autowidth' => 'on',
				'color' => '#599677',
				'style' => 'filled',
				'format' => 'rectangle'
			);

		foreach ($default_values as $option => $default_value) {
			if ( ! get_option('podlove_subscribe_button_default_' . $option ) ) {
				update_option('podlove_subscribe_button_default_' . $option, $default_value);
			}
		}
	}

	public static function shortcode( $args ) {
		if ( ! $args || ! isset($args['button']) ) {
			return __('You need to create a Button first and provide its ID.', 'podlove-subscribe-button');
		} else {
			$buttonid = $args['button'];
		}

		// Fetch the (network)button by it's name
		if ( ! $button = \PodloveSubscribeButton\Model\Button::get_button_by_name($args['button']) )
			return sprintf( __('Oops. There is no button with the ID "%s".', 'podlove-subscribe-button'), $args['button'] );

		// Get button styling and options
		$autowidth = self::interpret_width_attribute( self::get_array_value_with_fallback($args, 'width') );
		$size = self::get_attribute( 'size', self::get_array_value_with_fallback($args, 'size') );
		$style = self::get_attribute( 'style', self::get_array_value_with_fallback($args, 'style') );
		$format = self::get_attribute( 'format', self::get_array_value_with_fallback($args, 'format') );
		$color = self::get_attribute( 'color', self::get_array_value_with_fallback($args, 'color') );

		if ( isset($args['language']) ) {
			$language = $args['language'];
		} else {
			$language = 'en';
		}

		if ( isset($args['color']) ) {
			$color = $args['color'];
		} else {
			$color = get_option('podlove_subscribe_button_default_color', '#599677');
		}

		if ( isset($args['hide']) && $args['hide'] == 'true' ) {
			$hide = true;
		} else {
			$hide = false;
		}

		// Render button
		return $button->render($size, $autowidth, $style, $format, $color, $hide, $buttonid, $language);
	}

	public static function get_array_value_with_fallback($args, $key) {
		if ( isset($args[$key]) )
			return $args[$key];

		return false;
	}

	/**
	 * @param  string $attribute
	 * @param  string $attribute_value
	 * @return string
	 */
	private static function get_attribute($attribute=null, $attribute_value=null) {
		if ( isset($attribute_value) && ctype_alnum($attribute_value) && key_exists( $attribute_value, \PodloveSubscribeButton\Model\Button::$$attribute ) ) {
			return $attribute_value;
		} else {
			return get_option('podlove_subscribe_button_default_' . $attribute, \PodloveSubscribeButton\Model\Button::$properties[$attribute]);
		}
	}

	/**
	 * Interprets the provided width attribute and return either auto- or a specific width
	 * @param  string $width_attribute
	 * @return string
	 */
	private static function interpret_width_attribute( $width_attribute = null ) {
		if ( $width_attribute == 'auto' )
			return 'on';
		if ( $width_attribute && $width_attribute !== 'auto' )
			return 'off';

		return get_option('podlove_subscribe_button_default_autowidth', 'on');
	}

	public static function sanitize_settings( $input = null ) {
		if ( null == $input ) {
			return 'off';
		} elseif ( 'on' == $input ) {
			return $input;
		}
	}
}