<?php

/**
 * @file
 * Enables Drupal to add scripts and styles from frontend on all over the site.
 */

/**
 * Implements hook_page_top().
 *
 * Add scripts after the body tag on overall the site which are defined on the settings page.
 */
function header_and_footer_scripts_page_top(array &$page_top) {
  $body_section  = \Drupal::config('hfs_body_scripts.settings')->get();
  if (isset($body_section['styles']) && !empty($body_section['styles'])) {
    $output_styles = preg_split("/(<\/style>|\/>)/", $body_section['styles']);
    $i = 1;
    foreach ($output_styles as $row) {

      if (empty($row)) continue;

      $style_tag  = 'style';
      $style_attr = '';
      $value       = '';

      $style_attributes = preg_replace('/(<style|<link)/', '', $row, 1);
      $get_style_attr   = preg_split('/(>)/', $style_attributes, 2);

      if (isset($get_style_attr[1]))
        $value = $get_style_attr[1];

      $get_style_tag = preg_split('/<link/', $row, 2);

      if (isset($get_style_tag[1]))
        $style_tag  = 'link';
      
      if (isset($get_style_attr[0]) && !empty($get_style_attr[0])) {
        $get_attr   = preg_replace('/(\'|\")/', '', $get_style_attr[0]);
        $get_attr   = preg_replace('/\s+/', ',', $get_attr);
        $get_attr   = preg_replace('/(,=,|,=|=,)/', '=', $get_attr);
        $fetch_attr = explode(',', $get_attr);

        foreach ($fetch_attr as $attr) {
          if (empty($attr)) continue;
          
          $attr_key_value = explode('=', $attr);
          if (isset($attr_key_value[0]) && isset($attr_key_value[1]))
            $style_attr[$attr_key_value[0]] = $attr_key_value[1];
          else
            $style_attr[$attr_key_value[0]] = $attr_key_value[0];
        }
      }

      $page_top['top_styles_'.$i] = [
        '#type'       => 'html_tag',
        '#tag'        => $style_tag,
        '#value'      => $value
      ];
      if (is_array($style_attr))
        $page_top['top_styles_'.$i]['#attributes'] = $style_attr;
      $i++;
    }
  }
  if (isset($body_section['scripts']) && !empty($body_section['scripts'])) {
    $output_scripts = preg_split("/(<\/script>|<\/noscript>)/", $body_section['scripts']);
    $i = 1;
    foreach ($output_scripts as $row) {

      if (empty($row)) continue;

      $script_tag  = 'script';
      $script_attr = '';
      $value       = '';
      
      $script_attributes = preg_replace('/(<script|<noscript)/', '', $row, 1);
      $get_script_attr   = preg_split('/(>)/', $script_attributes, 2);

      if (isset($get_script_attr[1]))
        $value = $get_script_attr[1];

      $get_script_tag = preg_split('/<noscript/', $row, 2);

      if (isset($get_script_tag[1]))
        $script_tag  = 'noscript';

      if (isset($get_script_attr[0]) && !empty($get_script_attr[0])) {
        $get_attr   = preg_replace('/(\'|\")/', '', $get_script_attr[0]);
        $get_attr   = preg_replace('/\s+/', ',', $get_attr);
        $get_attr   = preg_replace('/(,=,|,=|=,)/', '=', $get_attr);
        $fetch_attr = explode(',', $get_attr);

        foreach ($fetch_attr as $attr) {
          if (empty($attr)) continue;
          
          $attr_key_value = explode('=', $attr);
          if (isset($attr_key_value[0]) && isset($attr_key_value[1]))
            $script_attr[$attr_key_value[0]] = $attr_key_value[1];
          else
            $script_attr[$attr_key_value[0]] = $attr_key_value[0];
        }
      }

      $page_top['top_scripts_'.$i] = [
        '#type'       => 'html_tag',
        '#tag'        => $script_tag,
        '#value'      => $value
      ];
      if (is_array($script_attr))
        $page_top['top_scripts_'.$i]['#attributes'] = $script_attr;
      $i++;
    }
  }
}

/**
 * Implements hook_page_bottom().
 *
 * Add scripts before the Footer tag on overall the site which are defined on the settings page.
 */
function header_and_footer_scripts_page_bottom(array &$page_bottom) {
  $footer_section = \Drupal::config('hfs_footer_scripts.settings')->get();
  if (isset($footer_section['styles']) && !empty($footer_section['styles'])) {
    $output_styles = preg_split("/(<\/style>|\/>)/", $footer_section['styles']);
    $i = 1;
    foreach ($output_styles as $row) {

      if (empty($row)) continue;

      $style_tag  = 'style';
      $style_attr = '';
      $value       = '';

      $style_attributes = preg_replace('/(<style|<link)/', '', $row, 1);        
      $get_style_attr   = preg_split('/(>)/', $style_attributes, 2);

      if (isset($get_style_attr[1]))
        $value = $get_style_attr[1];

      $get_style_tag = preg_split('/<link/', $row, 2);

      if (isset($get_style_tag[1]))
        $style_tag  = 'link';

      if (isset($get_style_attr[0]) && !empty($get_style_attr[0])) {
        $get_attr   = preg_replace('/(\'|\")/', '', $get_style_attr[0]);
        $get_attr   = preg_replace('/\s+/', ',', $get_attr);
        $get_attr   = preg_replace('/(,=,|,=|=,)/', '=', $get_attr);
        $fetch_attr = explode(',', $get_attr);

        foreach ($fetch_attr as $attr) {
          if (empty($attr)) continue;

          $attr_key_value = explode('=', $attr);
          if (isset($attr_key_value[0]) && isset($attr_key_value[1]))
            $style_attr[$attr_key_value[0]] = $attr_key_value[1];
          else
            $style_attr[$attr_key_value[0]] = $attr_key_value[0];
        }
      }

      $page_bottom['bottom_styles_'.$i] = [
        '#type'       => 'html_tag',
        '#tag'        => $style_tag,
        '#value'      => $value
      ];
      if (is_array($style_attr))
        $page_bottom['bottom_styles_'.$i]['#attributes'] = $style_attr;
      $i++;
    }
  }
  if (isset($footer_section['scripts']) && !empty($footer_section['scripts'])) {
    $output_scripts = preg_split("/(<\/script>|<\/noscript>)/", $footer_section['scripts']);
    $i = 1;
    foreach ($output_scripts as $row) {

      if (empty($row)) continue;

      $script_tag  = 'script';
      $script_attr = '';
      $value       = '';

      $script_attributes = preg_replace('/(<script|<noscript)/', '', $row, 1);        
      $get_script_attr   = preg_split('/(>)/', $script_attributes, 2);

      if (isset($get_script_attr[1]))
        $value = $get_script_attr[1];

      $get_script_tag = preg_split('/<noscript/', $row, 2);

      if (isset($get_script_tag[1]))
        $script_tag  = 'noscript';

      if (isset($get_script_attr[0]) && !empty($get_script_attr[0])) {
        $get_attr   = preg_replace('/(\'|\")/', '', $get_script_attr[0]);
        $get_attr   = preg_replace('/\s+/', ',', $get_attr);
        $get_attr   = preg_replace('/(,=,|,=|=,)/', '=', $get_attr);
        $fetch_attr = explode(',', $get_attr);

        foreach ($fetch_attr as $attr) {
          if (empty($attr)) continue;

          $attr_key_value = explode('=', $attr);
          if (isset($attr_key_value[0]) && isset($attr_key_value[1]))
            $script_attr[$attr_key_value[0]] = $attr_key_value[1];
          else
            $script_attr[$attr_key_value[0]] = $attr_key_value[0];
        }
      }

      $page_bottom['bottom_scripts_'.$i] = [
        '#type'       => 'html_tag',
        '#tag'        => $script_tag,
        '#value'      => $value
      ];
      if (is_array($script_attr))
        $page_bottom['bottom_scripts_'.$i]['#attributes'] = $script_attr;
      $i++;
    }
  }
}