<?php

/**
 * @file
 * An color field with a custom color picker using the Field Types API.
 */

module_load_include('inc', 'color_field', 'color_field.field');

/**
 * Implements hook_library().
 */
function color_field_library() {
  $path = libraries_get_path('jquery-simple-color');
  $libraries['jquery-simple-color'] = array(
    'title' => 'recurser jquery simple color',
    'website' => 'https://github.com/recurser/jquery-simple-color',
    'version' => '1.2.1',
    'js' => array(
      $path . '/jquery.simple-color.min.js' => array(),
    ),
  );

  $path = libraries_get_path('bgrins-spectrum');
  $libraries['bgrins-spectrum'] = array(
    'title' => 'color_field_spectrum_color_picker',
    'website' => 'http://bgrins.github.io/spectrum/',
    'version' => '1.6.0',
    'js' => array(
      $path . '/spectrum.js' => array(),
    ),
    'css' => array(
      $path . '/spectrum.css' => array(),
    ),
  );

  $path = libraries_get_path('dematte-color-picker');
  $libraries['dematte-color-picker'] = array(
    'title' => 'color_field_dematte_color_picker',
    'website' => 'http://www.dematte.at/colorPicker/',
    'version' => '0.9',
    'js' => array(
      $path . '/colorPicker.js' => array(),
    ),
  );

  $path = libraries_get_path('eyecon-color-picker');
  $libraries['eyecon-color-picker'] = array(
    'title' => 'color_field_eyecon_color_picker',
    'website' => 'http://www.eyecon.ro/colorpicker/',
    'version' => 'latest',
    'js' => array(
      $path . '/js/colorpicker.js' => array(),
    ),
  );
  return $libraries;
}

/**
 * Implements hook_theme().
 */
function color_field_theme($existing, $type, $theme, $path) {
  return array(
    'color_swatch' => array(
      'variables' => array('color' => '', 'width' => 50, 'height' => 50),
      'file' => 'color_field.theme.inc',
    ),
    'color_field_plain_text' => array(
      'render element' => 'element',
      'file' => 'color_field.theme.inc',
    ),
    'color_field_default_widget' => array(
      'render element' => 'element',
      'file' => 'color_field.theme.inc',
    ),
    'color_field_simple_widget' => array(
      'render element' => 'element',
      'file' => 'color_field.theme.inc',
    ),
    'color_field_spectrum_widget' => array(
      'render element' => 'element',
      'file' => 'color_field.theme.inc',
    ),
  );
}

/**
 * Helper: Convert RGB to HEX6.
 *
 * @param array $rgb
 *   The colors specified as an RGB triplet.
 *
 * @return string $hex
 *   The colors specified as an hexadecimal format (a hex triplet) (#134E1A).
 */
function color_field_rgb2hex($rgb = FALSE) {
  $hex = '';
  $hex .= str_pad(dechex($rgb[0]), 2, "0", STR_PAD_LEFT);
  $hex .= str_pad(dechex($rgb[1]), 2, "0", STR_PAD_LEFT);
  $hex .= str_pad(dechex($rgb[2]), 2, "0", STR_PAD_LEFT);
  return $hex;
}

/**
 * Helper: Convert HEX6 to RGB.
 *
 * @param string $hex
 *   The colors specified as an hexadecimal format (a hex triplet) (134E1A).
 *
 * @return string $rgba
 *   The colors specified as an RGB triplet.
 */
function color_field_hex2rgb($hex = FALSE) {
  $r = hexdec(substr($hex,0,2));
  $g = hexdec(substr($hex,2,2));
  $b = hexdec(substr($hex,-2));
  return compact('r', 'g', 'b');
}

/**
 * Helper: Convert HEX6 to RGBA.
 *
 * @param string $hex
 *   The colors specified as an hexadecimal format (a hex triplet) (134E1A).
 *
 * @param float $alpha
 *   The opacity value ranging for 0 to 1.
 *
 * @return string $rgba
 *   The colors specified as an RGB triplet plus the opacity.
 */
function color_field_hex2rgba($hex, $alpha = 1) {
  $r = hexdec(substr($hex,0,2));
  $g = hexdec(substr($hex,2,2));
  $b = hexdec(substr($hex,-2));
  $a = $alpha;
  return 'rgba(' . implode(compact('r', 'g', 'b', 'a'),',') . ')';
}