<?php
/**
 *
 * @package Widget_Base
 * @version 1.2.1
 */

/**
 * Core class for widget base.
 *
 * @since 1.0.0
 */
class Galway_Lite_Widget_Base extends WP_Widget
{

    /**
     * Fields.
     *
     * @since 1.0.0
     * @access private
     * @var array
     */
    private $fields;

    /**
     * PHP5 constructor.
     *
     * @since 1.0.0
     * @access public
     *
     * @param string $id_base Optional Base ID for the widget.
     * @param string $name Name for the widget.
     * @param array $widget_options Optional. Widget options.
     * @param array $control_options Optional. Widget control options.
     * @param array $fields Fields.
     */
    function __construct($id_base, $name, $widget_options = array(), $control_options = array(), $fields = array())
    {

        $this->fields = $fields;

        parent::__construct($id_base, $name, $widget_options, $control_options);

    }

    /**
     * This method should be implemented in the extended class.
     *
     * @since 1.0.0
     *
     * @param array $args Display arguments.
     * @param array $instance Settings for the current widget instance.
     */
    function widget($args, $instance)
    {

    }

    /**
     * Updates a particular instance of a widget.
     *
     * @since 1.0.0
     * @access public
     *
     * @param array $new_instance New settings for this instance.
     * @param array $old_instance Old settings for this instance.
     * @return array Settings to save or bool false to cancel saving.
     */
    function update($new_instance, $old_instance)
    {

        $instance = $old_instance;

        foreach ($this->fields as $key => $field) {

            $instance[$key] = $this->sanitize($key, $field, $new_instance[$key]);

        }

        return $instance;

    }

    /**
     * Sanitize field value.
     *
     * @since 1.0.0
     * @access private
     *
     * @param string $key Field key.
     * @param array $field Field.
     * @param mixed $value Raw value.
     * @return mixed Sanitized value.
     */
    private function sanitize($key, $field, $value)
    {

        $field_type = 'text';
        if (isset($field['type'])) {
            $field_type = esc_attr($field['type']);
        }
        if (!isset($field['default'])) {
            $field['default'] = null;
        }

        $output = null;

        if (isset($field['sanitize_callback']) && is_callable($field['sanitize_callback'])) {
            $output = call_user_func($field['sanitize_callback'], $key, $field, $value);
            return $output;
        }

        switch ($field_type) {
            case 'text':
                $output = sanitize_text_field($value);
                break;
            case 'image':
            case 'url':
                $output = esc_url_raw($value);
                break;
            case 'email':
                $output = sanitize_email($value);
                break;
            case 'number':
                if (isset($field['absolute']) && true === $field['absolute']) {
                    $number = absint($value);
                } else {
                    $number = intval($value);
                }
                $min = (isset($field['min']) ? $field['min'] : $number);
                $max = (isset($field['max']) ? $field['max'] : $number);
                $step = (isset($field['step']) ? $field['step'] : 1);
                if ($min === $max) {
                    // Simple number.
                    $output = ($number) ? $number : $field['default'];
                } else {
                    // Number range.
                    $output = $min <= $number && $number <= $max && is_int($number / $step) ? $number : $field['default'];
                }
                break;
            case 'textarea':
                if (current_user_can('unfiltered_html')) {
                    $output = $value;
                } else {
                    $sanitized_value = wp_kses_post($value);
                    $output = balanceTags($sanitized_value, true);
                }
                break;
            case 'select':
            case 'radio':
                $input = esc_attr($value);
                $choices = $field['options'];
                $output = array_key_exists($input, $choices) ? $input : $field['default'];
                break;
            case 'checkbox':
                $output = !empty($value);
                break;
            case 'dropdown-pages':
                $page_id = absint($value);
                $output = ('page' === get_post_type($page_id) && 'publish' === get_post_status($page_id)) ? $page_id : $field['default'];
                break;
            case 'dropdown-taxonomies':
                $output = absint($value);
                break;
            default:
                $output = esc_attr($value);
                break;
        }
        return $output;

    }

    /**
     * Sanitize field value.
     *
     * @since 1.0.0
     * @access private
     *
     * @param string $key Field key.
     * @param array $field Field.
     * @param array $instance Widget instance.
     * @return void
     */
    private function render_field($key, $field, $instance)
    {

        $value = null;
        if (isset($instance[$key])) {
            $value = $instance[$key];
        }
        $field_type = 'text';
        if (isset($field['type'])) {
            $field_type = esc_attr($field['type']);
        }
        if (!isset($field['class'])) {
            $field['class'] = '';
        }
        if (!isset($field['placeholder'])) {
            $field['placeholder'] = '';
        }
        if (!isset($field['css'])) {
            $field['css'] = '';
        }
        if (!isset($field['description'])) {
            $field['description'] = '';
        }
        if (!isset($field['readonly'])) {
            $field['readonly'] = false;
        }
        if (!isset($field['options'])) {
            $field['options'] = array();
        }
        if (!isset($field['rows']) || absint($field['rows']) < 1) {
            $field['rows'] = 4;
        }
        switch ($field_type) {
            case 'text':
            case 'url':
            case 'number':
            case 'email':
                ?>
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                        <span class="field-label"><strong><?php echo esc_html($field['label']); ?></strong></span>
                    </label>
                    <input
                            type="<?php echo esc_attr($field_type); ?>"
                            id="<?php echo esc_attr($this->get_field_id($key)); ?>"
                            name="<?php echo esc_attr($this->get_field_name($key)); ?>"
                            value="<?php echo esc_attr($value); ?>"
                            class="<?php echo esc_attr($field['class']); ?>"
                            style="<?php echo esc_attr($field['css']); ?>"
                            placeholder="<?php echo esc_attr($field['placeholder']); ?>"
                        <?php echo (isset($field['min'])) ? ' min="' . esc_attr($field['min']) . '" ' : ''; ?>
                        <?php echo (isset($field['max'])) ? ' max="' . esc_attr($field['max']) . '" ' : ''; ?>
                        <?php echo (isset($field['step'])) ? ' step="' . esc_attr($field['step']) . '" ' : ''; ?>
                        <?php echo (true === $field['readonly']) ? ' readonly ' : ''; ?>
                    />

                    <?php $this->render_description($field, $this->get_field_id($key)); ?>

                </p>
                <?php
                break;

            case 'color':
                ?>
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                        <span class="field-label"><strong><?php echo esc_html($field['label']); ?></strong></span>
                    </label>
                    <input
                            type="text"
                            id="<?php echo esc_attr($this->get_field_id($key)); ?>"
                            name="<?php echo esc_attr($this->get_field_name($key)); ?>"
                            value="<?php echo esc_attr($value); ?>"
                            class="select-color <?php echo esc_attr($field['class']); ?>"
                        <?php echo (isset($field['default'])) ? ' data-default-color="' . esc_attr($field['default']) . '" ' : ''; ?>
                    />
                    <?php $this->render_description($field, $this->get_field_id($key)); ?>
                </p>
                <?php
                break;

            case 'heading':
                $css = 'text-align:center;background-color:#f1f1f1;padding:5px 0;margin-top:5px;';
                if (!empty($field['css'])) {
                    $css = $field['css'];
                }
                ?>
                <h4 class="widefat <?php echo esc_attr($field['class']); ?>" style="<?php echo esc_attr($css); ?>">
                    <span class="field-label"><strong><?php echo esc_html($field['label']); ?></strong></span>
                </h4>
                <?php
                break;

            case 'image':
                ?>
                <div>
                    <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                        <span class="field-label"><strong><?php echo esc_html($field['label']); ?></strong></span>
                    </label>
                    <!-- <br /> -->
                    <input type="button" class="select-img button button-primary"
                           value="<?php esc_attr_e('Upload', 'galway-lite'); ?>"
                           data-uploader_title="<?php esc_attr_e('Select Image', 'galway-lite'); ?>"
                           data-uploader_button_text="<?php esc_attr_e('Choose Image', 'galway-lite'); ?>"/>
                    <?php
                    $image_status = false;
                    if (!empty($value)) {
                        $image_status = true;
                    }
                    $remove_button_style = 'display:none;';
                    if (true === $image_status) {
                        $remove_button_style = 'display:inline-block;';
                    }
                    ?>
                    <input type="button" value="<?php echo esc_attr_x('X', 'Remove', 'galway-lite'); ?>"
                           class="button button-secondary btn-image-remove"
                           style="<?php echo esc_attr($remove_button_style); ?>"/>
                    <input type="hidden" class="img" name="<?php echo esc_attr($this->get_field_name($key)); ?>"
                           id="<?php echo esc_attr($this->get_field_id($key)); ?>"
                           value="<?php echo esc_attr($value); ?>"/>
                    <div class="image-preview-wrap">
                        <?php if (!empty($value)) : ?>
                            <img src="<?php echo esc_attr($value); ?>" alt=""/>
                        <?php endif; ?>
                    </div><!-- .image-preview-wrap -->
                </div>
                <?php
                break;

            case 'message':
                $css = 'padding:10px 0;';
                if (!empty($field['css'])) {
                    $css = $field['css'];
                }
                ?>
                <div class="widefat field-message <?php echo esc_attr($field['class']); ?>"
                     style="<?php echo esc_attr($css); ?>">
                    <?php echo wp_kses_data($field['label']); ?>
                </div>
                <?php
                break;

            case 'divider':
                $css = 'border:1px #CCC solid;';
                if (!empty($field['css'])) {
                    $css = $field['css'];
                }
                ?>
                <hr style="<?php echo esc_attr($css); ?>"/>
                <?php
                break;

            case 'textarea':
                ?>
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                        <span class="field-label"><strong><?php echo esc_html($field['label']); ?></strong></span>
                    </label>
                    <textarea
                            type="text"
                            rows="<?php echo absint($field['rows']); ?>"
                            id="<?php echo esc_attr($this->get_field_id($key)); ?>"
                            name="<?php echo esc_attr($this->get_field_name($key)); ?>"
                            class="<?php echo esc_attr($field['class']); ?>"
                            style="<?php echo esc_attr($field['css']); ?>"
                            placeholder="<?php echo esc_attr($field['placeholder']); ?>"
                        <?php echo (true === $field['readonly']) ? ' readonly ' : ''; ?>
                    ><?php echo esc_textarea($value); ?></textarea>
                    <?php $this->render_description($field, $this->get_field_id($key)); ?>
                </p>
                <?php
                break;

            case 'checkbox':
                ?>
                <p>
                    <input
                            type="checkbox"
                            id="<?php echo esc_attr($this->get_field_id($key)); ?>"
                            name="<?php echo esc_attr($this->get_field_name($key)); ?>"
                            class="<?php echo esc_attr($field['class']); ?>"
                            style="<?php echo esc_attr($field['css']); ?>"
                        <?php checked(!empty($value)); ?>
                    />
                    <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                        <span class="field-label"><?php echo esc_html($field['label']); ?></span>
                    </label>
                    <?php $this->render_description($field, $this->get_field_id($key)); ?>
                </p>
                <?php
                break;

            case 'radio':
                ?>
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                        <span class="field-label"><strong><?php echo esc_html($field['label']); ?></strong></span>
                    </label><br/>
                    <?php if (!empty($field['options'])) : ?>
                        <?php foreach ($field['options'] as $k => $v) : ?>
                            <label for="<?php echo esc_attr($this->get_field_id($key) . '-' . $k); ?>">
                                <input type="radio" name="<?php echo esc_attr($this->get_field_name($key)); ?>"
                                       id="<?php echo esc_attr($this->get_field_id($key) . '-' . $k); ?>"
                                       value="<?php echo esc_attr($k); ?>" <?php checked($k, $value) ?> /><?php echo esc_html($v); ?>
                            </label>&nbsp;&nbsp;
                        <?php endforeach; ?>
                    <?php endif ?>

                    <?php $this->render_description($field, $this->get_field_id($key)); ?>
                </p>
                <?php
                break;

            case 'select':
                ?>
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                        <span class="field-label"><strong><?php echo esc_html($field['label']); ?></strong></span>
                    </label>
                    <select
                            type="text"
                            id="<?php echo esc_attr($this->get_field_id($key)); ?>"
                            name="<?php echo esc_attr($this->get_field_name($key)); ?>"
                            class="<?php echo esc_attr($field['class']); ?>"
                            style="<?php echo esc_attr($field['css']); ?>"
                    >
                        <?php if (!empty($field['options'])) : ?>
                            <?php foreach ($field['options'] as $option_key => $label) : ?>
                                <option
                                        value="<?php echo esc_attr($option_key); ?>" <?php selected($option_key, $value); ?>><?php echo esc_html($label); ?></option>
                            <?php endforeach; ?>
                        <?php endif; ?>

                    </select>
                    <?php $this->render_description($field, $this->get_field_id($key)); ?>
                </p>
                <?php
                break;

            case 'dropdown-taxonomies':
                $args = array();
                $args['selected'] = esc_attr($value);
                $args['taxonomy'] = (isset($field['taxonomy'])) ? esc_attr($field['taxonomy']) : 'category';
                $args['name'] = esc_attr($this->get_field_name($key));
                $args['id'] = esc_attr($this->get_field_id($key));
                $args['show_option_all'] = (isset($field['show_option_all'])) ? esc_html($field['show_option_all']) : '';
                $args['class'] = (isset($field['class'])) ? esc_attr($field['class']) : '';
                ?>
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                        <span class="field-label"><strong><?php echo esc_html($field['label']); ?></strong></span>
                    </label>
                    <?php wp_dropdown_categories($args); ?>
                    <?php $this->render_description($field, $this->get_field_id($key)); ?>
                </p>
                <?php
                break;

            case 'dropdown-pages':
                $args = array();
                $args['selected'] = $value;
                $args['name'] = esc_attr($this->get_field_name($key));
                $args['id'] = esc_attr($this->get_field_id($key));
                $args['show_option_none'] = (isset($field['show_option_none'])) ? esc_html($field['show_option_none']) : '';
                $args['class'] = (isset($field['class'])) ? esc_attr($field['class']) : '';
                ?>
                <p>
                    <label for="<?php echo esc_attr($this->get_field_id($key)); ?>">
                        <span class="field-label"><strong><?php echo esc_html($field['label']); ?></strong></span>
                    </label>
                    <?php wp_dropdown_pages($args); ?>
                    <?php $this->render_description($field, $this->get_field_id($key)); ?>
                </p>
                <?php
                break;

            default:
                break;
        }
    }

    /**
     * Outputs the settings update form.
     *
     * @since 1.0.0
     * @access public
     *
     * @param array $instance Current settings.
     * @return void
     */
    public function form($instance)
    {

        $instance = $this->add_defaults($instance);

        foreach ($this->fields as $key => $field) {

            $this->render_field($key, $field, $instance);

        }

    }

    /**
     * Outputs the field description.
     *
     * @since 1.0.0
     * @access private
     *
     * @param array $field Field.
     * @param string $id ID of the field.
     * @return void
     */
    private function render_description($field, $id = '')
    {

        if (!isset($field['description']) && empty($field['description'])) {
            return;
        }
        $custom_style = 'clear:both;display:block;';
        if (isset($field['adjacent']) && true === $field['adjacent']) {
            $custom_style = 'margin-left:5px;';
        }

        ?>
        <label for="<?php echo esc_attr($id); ?>" style="<?php echo esc_attr($custom_style); ?>">
            <span class="field-description"><em><?php echo esc_html($field['description']); ?></em></span>
        </label>
        <?php

    }

    /**
     * Return updated instance with defaults.
     *
     * @since 1.0.0
     * @access private
     *
     * @param array $instance Widget instance.
     * @return array Updated instance.
     */
    private function add_defaults($instance)
    {

        $default_arr = array();
        if (!empty($this->fields)) {
            foreach ($this->fields as $key => $field) {
                $default_arr[$key] = null;
                if (!isset($instance[$key]) && isset($field['default'])) {
                    $default_arr[$key] = $field['default'];
                }
            }
        }
        $instance = array_merge($default_arr, $instance);

        return $instance;

    }

    /**
     * Returns widget parameters.
     *
     * @since 1.0.0
     * @access public
     *
     * @param array $instance Widget instance.
     * @return array Parameters.
     */
    public function get_params($instance)
    {

        $output = array();
        if (!empty($this->fields)) {
            if (isset($instance['title'])) {
                $instance['title'] = apply_filters('widget_title', empty($instance['title']) ? '' : $instance['title'], $instance, $this->id_base);
            }
            $output = $this->add_defaults($instance);
        }
        return $output;

    }

}