<?php
/**
 * Plugin Name: Dotmailer Plugin
 * Description: Dotmailer add to address book
 */

// Security
defined('ABSPATH') or die();

// Define global variables
$apiemail = "";
$apipassword = "";
$listID = "";

// Add menu item to the admin panel
add_action( 'admin_menu', 'dotmailer_menu' );

// Add an options page
function dotmailer_menu() {
    add_options_page( 'Dotmailer Options', 'Dotmailer Details', 'manage_options', 'dotmailer', 'dotmailer_options' );
}

// Form for the options including three fields
function dotmailer_options() {
?>

<div class="wrap">
    <h2>Dotmailer API information</h2><br />
    <form method="post" action="options.php">
        <?php settings_fields( 'settings-group' );
        do_settings_sections( 'settings-group' );
        ?>
            <label>API key</label><br />
            <input type="email" name="apiemail" value="<?php echo get_option('apiemail'); ?>"><br /><br />
            <label>Password</label><br />
            <input type="password" name="apipassword" value="<?php echo get_option('apipassword'); ?>"><br /><br />
            <label>Address Book List ID</label><br />
            <small>This is the ID for the list you want to save contacts too. Find this by navigating to the list in Dotmailer and taking the 7 digit ID from the end of the URL</small><br /><br />
            <input type="number" name="listID" value="<?php echo get_option('listID'); ?>"/><br /><br />
            <label>Redirect after result</label><br />
            <small>Include the page slug of where you would like to redirect the user after <strong>successful</strong> submission</small><br />
            <input type="text" name="slugSuccess" value="<?php echo get_option('slugSuccess'); ?>"/><br /><br />
            <small>Include the page slug of where you would like to redirect the user after <strong>un</strong>successful submission</small><br />
            <input type="text" name="slugUnsuccess" value="<?php echo get_option('slugUnsuccess'); ?>"/><br />

            <p><input type="submit" value="Save" class="button-primary" /></p>
    </form>
</div>
<?php
}

// Registers the options
function register_settings() {
        register_setting('settings-group','apiemail');
        register_setting('settings-group','apipassword');
        register_setting('settings-group','listID');
        register_setting('settings-group','slugUnsuccess');
        register_setting('settings-group','slugSuccess');
    }

// Initialises the options registered
add_action( 'admin_init', 'register_settings' );


// Add a widget for the newsletter form which can be added to the footer/widget areas
class wp_dotmailer extends WP_Widget {

    // constructor
    function wp_dotmailer() {
         parent::WP_Widget(false, $name = __('Dotmailer Newsletter Signup', 'wp_widget_dotmailer') );
    }

    // widget form creation
    function form($instance) {
    // Check values
        if( $instance) {
             $title = esc_attr($instance['title']);
        } else {
             $title = '';
             $text = '';
        }
        ?>
            <p>
            <label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Widget Title', 'wp_widget_dotmailer'); ?></label>
            <input class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo $title; ?>" />
            </p>
        <?php

        }

        // widget update
        function update($new_instance, $old_instance) {
              $instance = $old_instance;
              // Fields
              $instance['title'] = strip_tags($new_instance['title']);
             return $instance;
        }

        // display widget
        function widget($args, $instance) {
           extract( $args );
           // these are the widget options
           $title = apply_filters('widget_title', $instance['title']);
           echo $before_widget;
           // Display the widget
           echo '<div class="widget-text wp_widget_dotmailer_box">';

           // Check if title is set
           if ( $title ) {
              echo $before_title . $title . $after_title;
           }
           echo '<form action="wp-content/plugins/dotmailer/dotmailer-add.php" method="POST">';
           echo '<label>Your email:</label>';
           echo '<input type="email" placeholder="your@email.com" name="useremail"/>';
           echo '<input type="submit" class="btn" value="Sign up" />';
           echo '</form>';
           echo '</div>';
           echo $after_widget;
        }
}

// register widget
add_action('widgets_init', create_function('', 'return register_widget("wp_dotmailer");'));
?>