<?php
/*
 *  ACF Color Swatch Field Class
 *
 *  All the logic for this field type
 *
 *  @class 		acf_field_swatch
 *  @extends		acf_field
 *  @package		ACF
 *  @subpackage	Fields
 */

// exit if accessed directly
if (!defined('ABSPATH'))
  exit;

if (!class_exists('acf_field_swatch')):
  class acf_field_swatch extends acf_field {

    /*
     *  __construct
     *
     *  Set name / label needed for actions / filters
     *
     *  @since	3.6
     *  @date	9/20/15
     */

    private $settings;
    
    function __construct() {
      // vars
      $this->name = 'swatch';
      $this->label = __('Color Swatch', 'acf');
      $this->category = 'choice';
      $this->defaults = array(
        'layout' => 'vertical',
        'choices' => array(),
        'default_value' => '',
        'other_choice' => 0,
        'save_other_choice' => 0,
        'return_format' => 'value'
      );
      
      $this->settings = array(
        'basename' => plugin_basename(__FILE__),
        'path' => apply_filters('acf/swatch_settings/path', plugin_dir_path(__FILE__)),
        'url' => apply_filters('acf/swatch_settings/url', plugin_dir_url(__FILE__)),
        'version' => '1.0.0'
      );
      // do not delete!
      parent::__construct();
    }
    
    /*
     *  render_field()
     *
     *  Create the HTML interface for your field
     *
     *  @param	$field (array) the $field being rendered
     *
     *  @type	action
     *  @since	3.6
     *  @date	23/01/13
     *
     *  @param	$field (array) the $field being edited
     *  @return	n/a
     */

    function render_field($field) {
      // vars
      $i = 0;
      $e = '';
      
      $ul = array(
        'class' => 'acf-swatch-list',
        'data-allow_null' => $field['allow_null'],
        'data-other_choice' => $field['other_choice']
      );
      
      // append to class
      $ul['class'] .= ' ' . ($field['layout'] == 'horizontal' ? 'acf-hl' : 'acf-bl');
      $ul['class'] .= ' ' . $field['class'];
      
      // select value
      $checked = '';
      $value = strval($field['value']);
      
      // selected choice
      if (isset($field['choices'][$value])) {
        $checked = $value;
        // custom choice
      } elseif ($field['other_choice'] && $value !== '') {
        $checked = 'other';
        // allow null
      } elseif ($field['allow_null']) {
        // do nothing
      } else {
        // select first input by default
        $checked = key($field['choices']);
      }
      
      // ensure $checked is a string (could be an int)
      $checked = strval($checked);
      // other choice
      
      if ($field['other_choice']) {
        // vars
        $input = array(
          'type' => 'text',
          'name' => $field['name'],
          'value' => '',
          'disabled' => 'disabled'
        );
        
        // select other choice if value is not a valid choice
        if ($checked === 'other') {
          unset($input['disabled']);
          $input['value'] = $field['value'];
        }
        
        // append other choice
        $field['choices']['other'] = '</label><input type="text"' . acf_esc_attr($input) . ' /><label>';
      }
      
      // bail early if no choices
      if (empty($field['choices']))
        return;
        
      // hiden input
      $e .= acf_get_hidden_input(array(
        'name' => $field['name']
      ));
      
      // open
      $e .= '<ul ' . acf_esc_attr($ul) . '>';
      
      // foreach choices
      foreach ($field['choices'] as $value => $label) {
        // ensure value is a string
        $value = strval($value);
        $class = '';
        // increase counter
        $i++;
        
        // vars
        $atts = array(
          'type' => 'radio',
          'id' => $field['id'],
          'name' => $field['name'],
          'value' => $value
        );
        
        // checked
        if ($value === $checked) {
          $atts['checked'] = 'checked';
          $class = ' class="selected"';
        }
        
        // disabled
        if (isset($field['disabled']) && acf_in_array($value, $field['disabled'])) {
          $atts['disabled'] = 'disabled';
        }
        
        // id (use crounter for each input)
        if ($i > 1) {
          $atts['id'] .= '-' . $value;
        }
        
        // append
        $e .= '<li><label' . $class . '><input ' . acf_esc_attr($atts) . '/><div class="swatch-toggle"><div class="swatch-color"></div></div>' . $label . '</label></li>';
      }
      
      // close
      $e .= '</ul>';
      // return
      echo $e;
    }
    
    /*
     *  render_field_settings()
     *
     *  Create extra options for your field. This is rendered when editing a field.
     *  The value of $field['name'] can be used (like bellow) to save extra data to the $field
     *
     *  @type	action
     *  @since	3.6
     *  @date	23/01/13
     *
     *  @param	$field	- an array holding all the field's data
     */

    function render_field_settings($field) {
      // encode choices (convert from array)
      $field['choices'] = acf_encode_choices($field['choices']);
      
      // choices
      acf_render_field_setting($field, array(
        'label' => __('Choices', 'acf'),
        'instructions' => __('Enter each color option one per line.', 'acf') . '<br /><br />' . __('red : Red', 'acf') . '<br />' . __('#fff : White', 'acf') . '<br />' . __('rgba(0,0,0,1) : Black', 'acf'),
        'type' => 'textarea',
        'name' => 'choices'
      ));
      
      // allow_null
      acf_render_field_setting($field, array(
        'label' => __('Allow Null?', 'acf'),
        'instructions' => '',
        'type' => 'radio',
        'name' => 'allow_null',
        'choices' => array(
          1 => __('Yes', 'acf'),
          0 => __('No', 'acf')
        ),
        'layout' => 'horizontal'
      ));
      
      // other_choice
      /* Doesn't work currently
      acf_render_field_setting( $field, array(
      'label'			=> __('Other','acf'),
      'instructions'	=> '',
      'type'			=> 'true_false',
      'name'			=> 'other_choice',
      'message'		=> __('Add 'other' choice to allow for custom values', 'acf')
      ));
      */
      // save_other_choice
      /*
      acf_render_field_setting( $field, array(
      'label'			=> __('Save Other','acf'),
      'instructions'	=> '',
      'type'			=> 'true_false',
      'name'			=> 'save_other_choice',
      'message'		=> __('Save 'other' values to the field's choices', 'acf')
      ));
      */
      
      // default_value
      acf_render_field_setting($field, array(
        'label' => __('Default Value', 'acf'),
        'instructions' => __('Appears when creating a new post', 'acf'),
        'type' => 'text',
        'name' => 'default_value'
      ));
      
      // layout
      acf_render_field_setting($field, array(
        'label' => __('Layout', 'acf'),
        'instructions' => '',
        'type' => 'radio',
        'name' => 'layout',
        'layout' => 'horizontal',
        'choices' => array(
          'vertical' => __('Vertical', 'acf'),
          'horizontal' => __('Horizontal', 'acf')
        )
      ));
      
      // return value
      acf_render_field_setting($field, array(
        'label' => __('Return Value', 'acf'),
        'instructions' => __('Specify the returned value on front end', 'acf'),
        'type' => 'radio',
        'name' => 'return_format',
        'layout' => 'horizontal',
        'choices' => array(
          'value' => __('Value', 'acf'),
          'label' => __('Label', 'acf'),
          'array' => __('Both (Array)', 'acf')
        )
      ));
    }
    
    /*
     *  update_field()
     *
     *  This filter is appied to the $field before it is saved to the database
     *
     *  @type	filter
     *  @since	3.6
     *  @date	23/01/13
     *
     *  @param	$field - the field array holding all the field options
     *  @param	$post_id - the field group ID (post_type = acf)
     *
     *  @return	$field - the modified field
     */

    function update_field($field) {
      // decode choices (convert to array)
      $field['choices'] = acf_decode_choices($field['choices']);
      // return
      return $field;
    }
    
    /*
     *  update_value()
     *
     *  This filter is appied to the $value before it is updated in the db
     *
     *  @type	filter
     *  @since	3.6
     *  @date	23/01/13
     *  @todo	Fix bug where $field was found via json and has no ID
     *
     *  @param	$value - the value which will be saved in the database
     *  @param	$post_id - the $post_id of which the value will be saved
     *  @param	$field - the field array holding all the field options
     *
     *  @return	$value - the modified value
     */

    function update_value($value, $post_id, $field) {

      // bail early if no value (allow 0 to be saved)
      if (!$value && !is_numeric($value))
        return $value;
        
      // save_other_choice
      if ($field['save_other_choice']) {
        // value isn't in choices yet
        if (!isset($field['choices'][$value])) {
          // get raw $field (may have been changed via repeater field)
          // if field is local, it won't have an ID
          $selector = $field['ID'] ? $field['ID'] : $field['key'];
          $field = acf_get_field($selector, true);
          
          // bail early if no ID (JSON only)
          if (!$field['ID'])
            return $value;
            
          // update $field
          $field['choices'][$value] = $value;
          // save
          acf_update_field($field);
        }
      }
      // return
      return $value;
    }
    
    /*
     *  load_value()
     *
     *  This filter is appied to the $value after it is loaded from the db
     *
     *  @type	filter
     *  @since	5.2.9
     *  @date	23/01/13
     *
     *  @param	$value - the value found in the database
     *  @param	$post_id - the $post_id from which the value was loaded from
     *  @param	$field - the field array holding all the field options
     *
     *  @return	$value - the value to be saved in te database
     */

    function load_value($value, $post_id, $field) {
      // must be single value
      if (is_array($value)) {
        $value = array_pop($value);
      }
      // return
      return $value;
    }
    
    /*
     *  format_value()
     *
     *  This filter is appied to the $value after it is loaded from the db and before it is returned to the template
     *
     *  @type	filter
     *  @since	3.6
     *  @date	23/01/13
     *
     *  @param	$value (mixed) the value which was loaded from the database
     *  @param	$post_id (mixed) the $post_id from which the value was loaded
     *  @param	$field (array) the field array holding all the field options
     *
     *  @return	$value (mixed) the modified value
     */

    function format_value($value, $post_id, $field) {
      // Get label from choices field
      $value = acf_get_field_type('select')->format_value($value, $post_id, $field);
      
      $map_to_transparent = array(
        '',
        'none'
      );

      // Replace values which should be returned as transparent
      if (is_array($value)) {
        if (in_array($value['value'], $map_to_transparent)) {
          $value['value'] = 'transparent';
        }
      } else {
        if (in_array($value, $map_to_transparent)) {
          $value = 'transparent';
        }
      }
      return $value;
    }
    
    function input_admin_enqueue_scripts() {
      // vars
      $url = $this->settings['url'];
      $version = $this->settings['version'];
      
      // register ACF scripts
      wp_register_script('acf-input-swatch', trailingslashit($url) . 'js/input.js', array(
        'acf-input'
      ), $version);
      
      wp_register_style('acf-input-swatch', trailingslashit($url) . 'css/input.css', array(
        'acf-input'
      ), $version);
      
      // scripts
      wp_enqueue_script(array(
        'acf-input-swatch'
      ));
      
      // styles
      wp_enqueue_style(array(
        'acf-input-swatch'
      ));
    }
  }
  
  new acf_field_swatch();
  
endif;