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1 <?php |
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2 |
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3 /** |
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4 * @file |
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5 * Defines a "managed_file" Form API field and a "file" field for Field module. |
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6 */ |
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7 |
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8 // Load all Field module hooks for File. |
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9 require_once DRUPAL_ROOT . '/modules/file/file.field.inc'; |
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10 |
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11 /** |
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12 * Implements hook_help(). |
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13 */ |
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14 function file_help($path, $arg) { |
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15 switch ($path) { |
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16 case 'admin/help#file': |
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17 $output = ''; |
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18 $output .= '<h3>' . t('About') . '</h3>'; |
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19 $output .= '<p>' . t('The File module defines a <em>File</em> field type for the Field module, which lets you manage and validate uploaded files attached to content on your site (see the <a href="@field-help">Field module help page</a> for more information about fields). For more information, see the online handbook entry for <a href="@file">File module</a>.', array('@field-help' => url('admin/help/field'), '@file' => 'http://drupal.org/documentation/modules/file')) . '</p>'; |
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20 $output .= '<h3>' . t('Uses') . '</h3>'; |
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21 $output .= '<dl>'; |
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22 $output .= '<dt>' . t('Attaching files to content') . '</dt>'; |
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23 $output .= '<dd>' . t('The File module allows users to attach files to content (e.g., PDF files, spreadsheets, etc.), when a <em>File</em> field is added to a given content type using the <a href="@fieldui-help">Field UI module</a>. You can add validation options to your File field, such as specifying a maximum file size and allowed file extensions.', array('@fieldui-help' => url('admin/help/field_ui'))) . '</dd>'; |
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24 $output .= '<dt>' . t('Managing attachment display') . '</dt>'; |
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25 $output .= '<dd>' . t('When you attach a file to content, you can specify whether it is <em>listed</em> or not. Listed files are displayed automatically in a section at the bottom of your content; non-listed files are available for embedding in your content, but are not included in the list at the bottom.') . '</dd>'; |
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26 $output .= '<dt>' . t('Managing file locations') . '</dt>'; |
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27 $output .= '<dd>' . t("When you create a File field, you can specify a directory where the files will be stored, which can be within either the <em>public</em> or <em>private</em> files directory. Files in the public directory can be accessed directly through the web server; when public files are listed, direct links to the files are used, and anyone who knows a file's URL can download the file. Files in the private directory are not accessible directly through the web server; when private files are listed, the links are Drupal path requests. This adds to server load and download time, since Drupal must start up and resolve the path for each file download request, but allows for access restrictions.") . '</dd>'; |
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28 $output .= '</dl>'; |
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29 return $output; |
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30 } |
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31 } |
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32 |
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33 /** |
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34 * Implements hook_menu(). |
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35 */ |
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36 function file_menu() { |
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37 $items = array(); |
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38 |
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39 $items['file/ajax'] = array( |
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40 'page callback' => 'file_ajax_upload', |
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41 'delivery callback' => 'ajax_deliver', |
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42 'access arguments' => array('access content'), |
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43 'theme callback' => 'ajax_base_page_theme', |
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44 'type' => MENU_CALLBACK, |
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45 ); |
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46 $items['file/progress'] = array( |
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47 'page callback' => 'file_ajax_progress', |
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48 'access arguments' => array('access content'), |
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49 'theme callback' => 'ajax_base_page_theme', |
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50 'type' => MENU_CALLBACK, |
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51 ); |
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52 |
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53 return $items; |
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54 } |
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55 |
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56 /** |
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57 * Implements hook_element_info(). |
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58 * |
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59 * The managed file element may be used anywhere in Drupal. |
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60 */ |
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61 function file_element_info() { |
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62 $file_path = drupal_get_path('module', 'file'); |
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63 $types['managed_file'] = array( |
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64 '#input' => TRUE, |
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65 '#process' => array('file_managed_file_process'), |
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66 '#value_callback' => 'file_managed_file_value', |
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67 '#element_validate' => array('file_managed_file_validate'), |
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68 '#pre_render' => array('file_managed_file_pre_render'), |
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69 '#theme' => 'file_managed_file', |
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70 '#theme_wrappers' => array('form_element'), |
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71 '#progress_indicator' => 'throbber', |
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72 '#progress_message' => NULL, |
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73 '#upload_validators' => array(), |
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74 '#upload_location' => NULL, |
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75 '#size' => 22, |
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76 '#extended' => FALSE, |
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77 '#attached' => array( |
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78 'css' => array($file_path . '/file.css'), |
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79 'js' => array($file_path . '/file.js'), |
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80 ), |
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81 ); |
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82 return $types; |
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83 } |
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84 |
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85 /** |
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86 * Implements hook_theme(). |
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87 */ |
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88 function file_theme() { |
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89 return array( |
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90 // file.module. |
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91 'file_link' => array( |
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92 'variables' => array('file' => NULL, 'icon_directory' => NULL), |
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93 ), |
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94 'file_icon' => array( |
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95 'variables' => array('file' => NULL, 'icon_directory' => NULL, 'alt' => ''), |
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96 ), |
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97 'file_managed_file' => array( |
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98 'render element' => 'element', |
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99 ), |
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100 |
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101 // file.field.inc. |
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102 'file_widget' => array( |
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103 'render element' => 'element', |
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104 ), |
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105 'file_widget_multiple' => array( |
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106 'render element' => 'element', |
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107 ), |
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108 'file_formatter_table' => array( |
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109 'variables' => array('items' => NULL), |
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110 ), |
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111 'file_upload_help' => array( |
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112 'variables' => array('description' => NULL, 'upload_validators' => NULL), |
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113 ), |
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114 ); |
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115 } |
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116 |
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117 /** |
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118 * Implements hook_file_download(). |
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119 * |
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120 * This function takes an extra parameter $field_type so that it may |
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121 * be re-used by other File-like modules, such as Image. |
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122 */ |
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123 function file_file_download($uri, $field_type = 'file') { |
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124 global $user; |
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125 |
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126 // Get the file record based on the URI. If not in the database just return. |
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127 $files = file_load_multiple(array(), array('uri' => $uri)); |
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128 if (count($files)) { |
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129 foreach ($files as $item) { |
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130 // Since some database servers sometimes use a case-insensitive comparison |
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131 // by default, double check that the filename is an exact match. |
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132 if ($item->uri === $uri) { |
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133 $file = $item; |
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134 break; |
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135 } |
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136 } |
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137 } |
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138 if (!isset($file)) { |
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139 return; |
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140 } |
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141 |
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142 // Find out which (if any) fields of this type contain the file. |
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143 $references = file_get_file_references($file, NULL, FIELD_LOAD_CURRENT, $field_type); |
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144 |
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145 // Stop processing if there are no references in order to avoid returning |
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146 // headers for files controlled by other modules. Make an exception for |
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147 // temporary files where the host entity has not yet been saved (for example, |
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148 // an image preview on a node/add form) in which case, allow download by the |
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149 // file's owner. For anonymous file owners, only the browser session that |
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150 // uploaded the file should be granted access. |
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151 if (empty($references) && ($file->status == FILE_STATUS_PERMANENT || $file->uid != $user->uid || (!$user->uid && empty($_SESSION['anonymous_allowed_file_ids'][$file->fid])))) { |
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152 return; |
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153 } |
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154 |
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155 // Default to allow access. |
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156 $denied = FALSE; |
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157 // Loop through all references of this file. If a reference explicitly allows |
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158 // access to the field to which this file belongs, no further checks are done |
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159 // and download access is granted. If a reference denies access, eventually |
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160 // existing additional references are checked. If all references were checked |
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161 // and no reference denied access, access is granted as well. If at least one |
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162 // reference denied access, access is denied. |
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163 foreach ($references as $field_name => $field_references) { |
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164 foreach ($field_references as $entity_type => $type_references) { |
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165 foreach ($type_references as $id => $reference) { |
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166 // Try to load $entity and $field. |
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167 $entity = entity_load($entity_type, array($id)); |
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168 $entity = reset($entity); |
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169 $field = field_info_field($field_name); |
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170 |
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171 // Load the field item that references the file. |
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172 $field_item = NULL; |
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173 if ($entity) { |
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174 // Load all field items for that entity. |
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175 $field_items = field_get_items($entity_type, $entity, $field_name); |
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176 |
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177 // Find the field item with the matching URI. |
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178 foreach ($field_items as $item) { |
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179 if ($item['uri'] == $uri) { |
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180 $field_item = $item; |
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181 break; |
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182 } |
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183 } |
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184 } |
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185 |
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186 // Check that $entity, $field and $field_item were loaded successfully |
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187 // and check if access to that field is not disallowed. If any of these |
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188 // checks fail, stop checking access for this reference. |
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189 if (empty($entity) || empty($field) || empty($field_item) || !field_access('view', $field, $entity_type, $entity)) { |
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190 $denied = TRUE; |
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191 break; |
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192 } |
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193 |
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194 // Invoke hook and collect grants/denies for download access. |
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195 // Default to FALSE and let entities overrule this ruling. |
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196 $grants = array('system' => FALSE); |
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197 foreach (module_implements('file_download_access') as $module) { |
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198 $grants = array_merge($grants, array($module => module_invoke($module, 'file_download_access', $field_item, $entity_type, $entity))); |
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199 } |
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200 // Allow other modules to alter the returned grants/denies. |
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201 drupal_alter('file_download_access', $grants, $field_item, $entity_type, $entity); |
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202 |
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203 if (in_array(TRUE, $grants)) { |
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204 // If TRUE is returned, access is granted and no further checks are |
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205 // necessary. |
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206 $denied = FALSE; |
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207 break 3; |
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208 } |
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209 |
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210 if (in_array(FALSE, $grants)) { |
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211 // If an implementation returns FALSE, access to this entity is denied |
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212 // but the file could belong to another entity to which the user might |
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213 // have access. Continue with these. |
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214 $denied = TRUE; |
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215 } |
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216 } |
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217 } |
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218 } |
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219 |
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220 // Access specifically denied. |
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221 if ($denied) { |
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222 return -1; |
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223 } |
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224 |
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225 // Access is granted. |
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226 $headers = file_get_content_headers($file); |
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227 return $headers; |
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228 } |
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229 |
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230 /** |
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231 * Menu callback; Shared Ajax callback for file uploads and deletions. |
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232 * |
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233 * This rebuilds the form element for a particular field item. As long as the |
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234 * form processing is properly encapsulated in the widget element the form |
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235 * should rebuild correctly using FAPI without the need for additional callbacks |
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236 * or processing. |
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237 */ |
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238 function file_ajax_upload() { |
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239 $form_parents = func_get_args(); |
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240 $form_build_id = (string) array_pop($form_parents); |
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241 |
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242 if (empty($_POST['form_build_id']) || $form_build_id != $_POST['form_build_id']) { |
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243 // Invalid request. |
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244 drupal_set_message(t('An unrecoverable error occurred. The uploaded file likely exceeded the maximum file size (@size) that this server supports.', array('@size' => format_size(file_upload_max_size()))), 'error'); |
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245 $commands = array(); |
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246 $commands[] = ajax_command_replace(NULL, theme('status_messages')); |
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247 return array('#type' => 'ajax', '#commands' => $commands); |
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248 } |
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249 |
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250 list($form, $form_state, $form_id, $form_build_id, $commands) = ajax_get_form(); |
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251 |
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252 if (!$form) { |
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253 // Invalid form_build_id. |
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254 drupal_set_message(t('An unrecoverable error occurred. Use of this form has expired. Try reloading the page and submitting again.'), 'error'); |
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255 $commands = array(); |
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256 $commands[] = ajax_command_replace(NULL, theme('status_messages')); |
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257 return array('#type' => 'ajax', '#commands' => $commands); |
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258 } |
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259 |
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260 // Get the current element and count the number of files. |
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261 $current_element = $form; |
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262 foreach ($form_parents as $parent) { |
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263 $current_element = $current_element[$parent]; |
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264 } |
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265 $current_file_count = isset($current_element['#file_upload_delta']) ? $current_element['#file_upload_delta'] : 0; |
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266 |
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267 // Process user input. $form and $form_state are modified in the process. |
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268 drupal_process_form($form['#form_id'], $form, $form_state); |
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269 |
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270 // Retrieve the element to be rendered. |
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271 foreach ($form_parents as $parent) { |
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272 $form = $form[$parent]; |
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273 } |
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274 |
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275 // Add the special Ajax class if a new file was added. |
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276 if (isset($form['#file_upload_delta']) && $current_file_count < $form['#file_upload_delta']) { |
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277 $form[$current_file_count]['#attributes']['class'][] = 'ajax-new-content'; |
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278 } |
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279 // Otherwise just add the new content class on a placeholder. |
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280 else { |
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281 $form['#suffix'] .= '<span class="ajax-new-content"></span>'; |
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282 } |
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283 |
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284 $form['#prefix'] .= theme('status_messages'); |
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285 $output = drupal_render($form); |
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286 $js = drupal_add_js(); |
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287 $settings = drupal_array_merge_deep_array($js['settings']['data']); |
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288 |
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289 $commands[] = ajax_command_replace(NULL, $output, $settings); |
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290 return array('#type' => 'ajax', '#commands' => $commands); |
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291 } |
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292 |
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293 /** |
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294 * Menu callback for upload progress. |
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295 * |
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296 * @param $key |
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297 * The unique key for this upload process. |
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298 */ |
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299 function file_ajax_progress($key) { |
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300 $progress = array( |
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301 'message' => t('Starting upload...'), |
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302 'percentage' => -1, |
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303 ); |
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304 |
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305 $implementation = file_progress_implementation(); |
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306 if ($implementation == 'uploadprogress') { |
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307 $status = uploadprogress_get_info($key); |
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308 if (isset($status['bytes_uploaded']) && !empty($status['bytes_total'])) { |
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309 $progress['message'] = t('Uploading... (@current of @total)', array('@current' => format_size($status['bytes_uploaded']), '@total' => format_size($status['bytes_total']))); |
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310 $progress['percentage'] = round(100 * $status['bytes_uploaded'] / $status['bytes_total']); |
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311 } |
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312 } |
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313 elseif ($implementation == 'apc') { |
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314 $status = apc_fetch('upload_' . $key); |
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315 if (isset($status['current']) && !empty($status['total'])) { |
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316 $progress['message'] = t('Uploading... (@current of @total)', array('@current' => format_size($status['current']), '@total' => format_size($status['total']))); |
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317 $progress['percentage'] = round(100 * $status['current'] / $status['total']); |
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318 } |
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319 } |
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320 |
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321 drupal_json_output($progress); |
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322 } |
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323 |
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324 /** |
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325 * Determines the preferred upload progress implementation. |
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326 * |
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327 * @return |
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328 * A string indicating which upload progress system is available. Either "apc" |
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329 * or "uploadprogress". If neither are available, returns FALSE. |
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330 */ |
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331 function file_progress_implementation() { |
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332 static $implementation; |
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333 if (!isset($implementation)) { |
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334 $implementation = FALSE; |
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335 |
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336 // We prefer the PECL extension uploadprogress because it supports multiple |
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337 // simultaneous uploads. APC only supports one at a time. |
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338 if (extension_loaded('uploadprogress')) { |
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339 $implementation = 'uploadprogress'; |
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340 } |
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341 elseif (extension_loaded('apc') && ini_get('apc.rfc1867')) { |
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342 $implementation = 'apc'; |
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343 } |
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344 } |
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345 return $implementation; |
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346 } |
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347 |
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348 /** |
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349 * Implements hook_file_delete(). |
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350 */ |
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351 function file_file_delete($file) { |
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352 // TODO: Remove references to a file that is in-use. |
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353 } |
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354 |
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355 /** |
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356 * Process function to expand the managed_file element type. |
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357 * |
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358 * Expands the file type to include Upload and Remove buttons, as well as |
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359 * support for a default value. |
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360 */ |
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361 function file_managed_file_process($element, &$form_state, $form) { |
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362 // Append the '-upload' to the #id so the field label's 'for' attribute |
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363 // corresponds with the file element. |
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364 $original_id = $element['#id']; |
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365 $element['#id'] .= '-upload'; |
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366 $fid = isset($element['#value']['fid']) ? $element['#value']['fid'] : 0; |
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367 |
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368 // Set some default element properties. |
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369 $element['#progress_indicator'] = empty($element['#progress_indicator']) ? 'none' : $element['#progress_indicator']; |
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370 $element['#file'] = $fid ? file_load($fid) : FALSE; |
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371 $element['#tree'] = TRUE; |
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372 |
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373 $ajax_settings = array( |
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374 'path' => 'file/ajax/' . implode('/', $element['#array_parents']) . '/' . $form['form_build_id']['#value'], |
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375 'wrapper' => $original_id . '-ajax-wrapper', |
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376 'effect' => 'fade', |
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377 'progress' => array( |
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378 'type' => $element['#progress_indicator'], |
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379 'message' => $element['#progress_message'], |
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380 ), |
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381 ); |
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382 |
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383 // Set up the buttons first since we need to check if they were clicked. |
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384 $element['upload_button'] = array( |
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385 '#name' => implode('_', $element['#parents']) . '_upload_button', |
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386 '#type' => 'submit', |
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387 '#value' => t('Upload'), |
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388 '#validate' => array(), |
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389 '#submit' => array('file_managed_file_submit'), |
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390 '#limit_validation_errors' => array($element['#parents']), |
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391 '#ajax' => $ajax_settings, |
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392 '#weight' => -5, |
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393 ); |
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394 |
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395 // Force the progress indicator for the remove button to be either 'none' or |
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396 // 'throbber', even if the upload button is using something else. |
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397 $ajax_settings['progress']['type'] = ($element['#progress_indicator'] == 'none') ? 'none' : 'throbber'; |
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398 $ajax_settings['progress']['message'] = NULL; |
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399 $ajax_settings['effect'] = 'none'; |
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400 $element['remove_button'] = array( |
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401 '#name' => implode('_', $element['#parents']) . '_remove_button', |
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402 '#type' => 'submit', |
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403 '#value' => t('Remove'), |
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404 '#validate' => array(), |
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405 '#submit' => array('file_managed_file_submit'), |
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406 '#limit_validation_errors' => array($element['#parents']), |
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407 '#ajax' => $ajax_settings, |
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408 '#weight' => -5, |
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409 ); |
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410 |
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411 $element['fid'] = array( |
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412 '#type' => 'hidden', |
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413 '#value' => $fid, |
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414 ); |
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415 |
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416 // Add progress bar support to the upload if possible. |
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417 if ($element['#progress_indicator'] == 'bar' && $implementation = file_progress_implementation()) { |
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418 $upload_progress_key = mt_rand(); |
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419 |
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420 if ($implementation == 'uploadprogress') { |
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421 $element['UPLOAD_IDENTIFIER'] = array( |
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422 '#type' => 'hidden', |
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423 '#value' => $upload_progress_key, |
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424 '#attributes' => array('class' => array('file-progress')), |
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425 // Uploadprogress extension requires this field to be at the top of the |
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426 // form. |
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427 '#weight' => -20, |
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428 ); |
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429 } |
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430 elseif ($implementation == 'apc') { |
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431 $element['APC_UPLOAD_PROGRESS'] = array( |
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432 '#type' => 'hidden', |
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433 '#value' => $upload_progress_key, |
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434 '#attributes' => array('class' => array('file-progress')), |
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435 // Uploadprogress extension requires this field to be at the top of the |
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436 // form. |
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437 '#weight' => -20, |
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438 ); |
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439 } |
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440 |
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441 // Add the upload progress callback. |
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442 $element['upload_button']['#ajax']['progress']['path'] = 'file/progress/' . $upload_progress_key; |
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443 } |
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444 |
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445 // The file upload field itself. |
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446 $element['upload'] = array( |
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447 '#name' => 'files[' . implode('_', $element['#parents']) . ']', |
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448 '#type' => 'file', |
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449 '#title' => t('Choose a file'), |
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450 '#title_display' => 'invisible', |
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451 '#size' => $element['#size'], |
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452 '#theme_wrappers' => array(), |
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453 '#weight' => -10, |
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454 ); |
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455 |
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456 if ($fid && $element['#file']) { |
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457 $element['filename'] = array( |
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458 '#type' => 'markup', |
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459 '#markup' => theme('file_link', array('file' => $element['#file'])) . ' ', |
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460 '#weight' => -10, |
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461 ); |
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462 // Anonymous users who have uploaded a temporary file need a |
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463 // non-session-based token added so file_managed_file_value() can check |
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464 // that they have permission to use this file on subsequent submissions of |
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465 // the same form (for example, after an Ajax upload or form validation |
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466 // error). |
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467 if (!$GLOBALS['user']->uid && $element['#file']->status != FILE_STATUS_PERMANENT) { |
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468 $element['fid_token'] = array( |
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469 '#type' => 'hidden', |
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470 '#value' => drupal_hmac_base64('file-' . $fid, drupal_get_private_key() . drupal_get_hash_salt()), |
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471 ); |
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472 } |
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473 } |
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474 |
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475 // Add the extension list to the page as JavaScript settings. |
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476 if (isset($element['#upload_validators']['file_validate_extensions'][0])) { |
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477 $extension_list = implode(',', array_filter(explode(' ', $element['#upload_validators']['file_validate_extensions'][0]))); |
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478 $element['upload']['#attached']['js'] = array( |
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479 array( |
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480 'type' => 'setting', |
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481 'data' => array('file' => array('elements' => array('#' . $element['#id'] => $extension_list))) |
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482 ) |
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483 ); |
|
484 } |
|
485 |
|
486 // Prefix and suffix used for Ajax replacement. |
|
487 $element['#prefix'] = '<div id="' . $original_id . '-ajax-wrapper">'; |
|
488 $element['#suffix'] = '</div>'; |
|
489 |
|
490 return $element; |
|
491 } |
|
492 |
|
493 /** |
|
494 * The #value_callback for a managed_file type element. |
|
495 */ |
|
496 function file_managed_file_value(&$element, $input = FALSE, $form_state = NULL) { |
|
497 $fid = 0; |
|
498 $force_default = FALSE; |
|
499 |
|
500 // Find the current value of this field from the form state. |
|
501 $form_state_fid = $form_state['values']; |
|
502 foreach ($element['#parents'] as $parent) { |
|
503 $form_state_fid = isset($form_state_fid[$parent]) ? $form_state_fid[$parent] : 0; |
|
504 } |
|
505 |
|
506 if ($element['#extended'] && isset($form_state_fid['fid'])) { |
|
507 $fid = $form_state_fid['fid']; |
|
508 } |
|
509 elseif (is_numeric($form_state_fid)) { |
|
510 $fid = $form_state_fid; |
|
511 } |
|
512 |
|
513 // Process any input and save new uploads. |
|
514 if ($input !== FALSE) { |
|
515 $return = $input; |
|
516 |
|
517 // Uploads take priority over all other values. |
|
518 if ($file = file_managed_file_save_upload($element)) { |
|
519 $fid = $file->fid; |
|
520 } |
|
521 else { |
|
522 // Check for #filefield_value_callback values. |
|
523 // Because FAPI does not allow multiple #value_callback values like it |
|
524 // does for #element_validate and #process, this fills the missing |
|
525 // functionality to allow File fields to be extended through FAPI. |
|
526 if (isset($element['#file_value_callbacks'])) { |
|
527 foreach ($element['#file_value_callbacks'] as $callback) { |
|
528 $callback($element, $input, $form_state); |
|
529 } |
|
530 } |
|
531 // If a FID was submitted, load the file (and check access if it's not a |
|
532 // public file) to confirm it exists and that the current user has access |
|
533 // to it. |
|
534 if (isset($input['fid']) && ($file = file_load($input['fid']))) { |
|
535 // By default the public:// file scheme provided by Drupal core is the |
|
536 // only one that allows files to be publicly accessible to everyone, so |
|
537 // it is the only one for which the file access checks are bypassed. |
|
538 // Other modules which provide publicly accessible streams of their own |
|
539 // in hook_stream_wrappers() can add the corresponding scheme to the |
|
540 // 'file_public_schema' variable to bypass file access checks for those |
|
541 // as well. This should only be done for schemes that are completely |
|
542 // publicly accessible, with no download restrictions; for security |
|
543 // reasons all other schemes must go through the file_download_access() |
|
544 // check. |
|
545 if (!in_array(file_uri_scheme($file->uri), variable_get('file_public_schema', array('public'))) && !file_download_access($file->uri)) { |
|
546 $force_default = TRUE; |
|
547 } |
|
548 // Temporary files that belong to other users should never be allowed. |
|
549 elseif ($file->status != FILE_STATUS_PERMANENT) { |
|
550 if ($GLOBALS['user']->uid && $file->uid != $GLOBALS['user']->uid) { |
|
551 $force_default = TRUE; |
|
552 } |
|
553 // Since file ownership can't be determined for anonymous users, they |
|
554 // are not allowed to reuse temporary files at all. But they do need |
|
555 // to be able to reuse their own files from earlier submissions of |
|
556 // the same form, so to allow that, check for the token added by |
|
557 // file_managed_file_process(). |
|
558 elseif (!$GLOBALS['user']->uid) { |
|
559 $token = drupal_array_get_nested_value($form_state['input'], array_merge($element['#parents'], array('fid_token'))); |
|
560 if ($token !== drupal_hmac_base64('file-' . $file->fid, drupal_get_private_key() . drupal_get_hash_salt())) { |
|
561 $force_default = TRUE; |
|
562 } |
|
563 } |
|
564 } |
|
565 // If all checks pass, allow the file to be changed. |
|
566 if (!$force_default) { |
|
567 $fid = $file->fid; |
|
568 } |
|
569 } |
|
570 } |
|
571 } |
|
572 |
|
573 // If there is no input or if the default value was requested above, use the |
|
574 // default value. |
|
575 if ($input === FALSE || $force_default) { |
|
576 if ($element['#extended']) { |
|
577 $default_fid = isset($element['#default_value']['fid']) ? $element['#default_value']['fid'] : 0; |
|
578 $return = isset($element['#default_value']) ? $element['#default_value'] : array('fid' => 0); |
|
579 } |
|
580 else { |
|
581 $default_fid = isset($element['#default_value']) ? $element['#default_value'] : 0; |
|
582 $return = array('fid' => 0); |
|
583 } |
|
584 |
|
585 // Confirm that the file exists when used as a default value. |
|
586 if ($default_fid && $file = file_load($default_fid)) { |
|
587 $fid = $file->fid; |
|
588 } |
|
589 } |
|
590 |
|
591 $return['fid'] = $fid; |
|
592 |
|
593 return $return; |
|
594 } |
|
595 |
|
596 /** |
|
597 * An #element_validate callback for the managed_file element. |
|
598 */ |
|
599 function file_managed_file_validate(&$element, &$form_state) { |
|
600 // If referencing an existing file, only allow if there are existing |
|
601 // references. This prevents unmanaged files from being deleted if this |
|
602 // item were to be deleted. |
|
603 $clicked_button = end($form_state['triggering_element']['#parents']); |
|
604 if ($clicked_button != 'remove_button' && !empty($element['fid']['#value'])) { |
|
605 if ($file = file_load($element['fid']['#value'])) { |
|
606 if ($file->status == FILE_STATUS_PERMANENT) { |
|
607 $references = file_usage_list($file); |
|
608 if (empty($references)) { |
|
609 form_error($element, t('The file used in the !name field may not be referenced.', array('!name' => $element['#title']))); |
|
610 } |
|
611 } |
|
612 } |
|
613 else { |
|
614 form_error($element, t('The file referenced by the !name field does not exist.', array('!name' => $element['#title']))); |
|
615 } |
|
616 } |
|
617 |
|
618 // Check required property based on the FID. |
|
619 if ($element['#required'] && empty($element['fid']['#value']) && !in_array($clicked_button, array('upload_button', 'remove_button'))) { |
|
620 form_error($element['upload'], t('!name field is required.', array('!name' => $element['#title']))); |
|
621 } |
|
622 |
|
623 // Consolidate the array value of this field to a single FID. |
|
624 if (!$element['#extended']) { |
|
625 form_set_value($element, $element['fid']['#value'], $form_state); |
|
626 } |
|
627 } |
|
628 |
|
629 /** |
|
630 * Form submission handler for upload / remove buttons of managed_file elements. |
|
631 * |
|
632 * @see file_managed_file_process() |
|
633 */ |
|
634 function file_managed_file_submit($form, &$form_state) { |
|
635 // Determine whether it was the upload or the remove button that was clicked, |
|
636 // and set $element to the managed_file element that contains that button. |
|
637 $parents = $form_state['triggering_element']['#array_parents']; |
|
638 $button_key = array_pop($parents); |
|
639 $element = drupal_array_get_nested_value($form, $parents); |
|
640 |
|
641 // No action is needed here for the upload button, because all file uploads on |
|
642 // the form are processed by file_managed_file_value() regardless of which |
|
643 // button was clicked. Action is needed here for the remove button, because we |
|
644 // only remove a file in response to its remove button being clicked. |
|
645 if ($button_key == 'remove_button') { |
|
646 // If it's a temporary file we can safely remove it immediately, otherwise |
|
647 // it's up to the implementing module to clean up files that are in use. |
|
648 if ($element['#file'] && $element['#file']->status == 0) { |
|
649 file_delete($element['#file']); |
|
650 } |
|
651 // Update both $form_state['values'] and $form_state['input'] to reflect |
|
652 // that the file has been removed, so that the form is rebuilt correctly. |
|
653 // $form_state['values'] must be updated in case additional submit handlers |
|
654 // run, and for form building functions that run during the rebuild, such as |
|
655 // when the managed_file element is part of a field widget. |
|
656 // $form_state['input'] must be updated so that file_managed_file_value() |
|
657 // has correct information during the rebuild. |
|
658 $values_element = $element['#extended'] ? $element['fid'] : $element; |
|
659 form_set_value($values_element, NULL, $form_state); |
|
660 drupal_array_set_nested_value($form_state['input'], $values_element['#parents'], NULL); |
|
661 } |
|
662 |
|
663 // Set the form to rebuild so that $form is correctly updated in response to |
|
664 // processing the file removal. Since this function did not change $form_state |
|
665 // if the upload button was clicked, a rebuild isn't necessary in that |
|
666 // situation and setting $form_state['redirect'] to FALSE would suffice. |
|
667 // However, we choose to always rebuild, to keep the form processing workflow |
|
668 // consistent between the two buttons. |
|
669 $form_state['rebuild'] = TRUE; |
|
670 } |
|
671 |
|
672 /** |
|
673 * Saves any files that have been uploaded into a managed_file element. |
|
674 * |
|
675 * @param $element |
|
676 * The FAPI element whose values are being saved. |
|
677 * |
|
678 * @return |
|
679 * The file object representing the file that was saved, or FALSE if no file |
|
680 * was saved. |
|
681 */ |
|
682 function file_managed_file_save_upload($element) { |
|
683 $upload_name = implode('_', $element['#parents']); |
|
684 if (empty($_FILES['files']['name'][$upload_name])) { |
|
685 return FALSE; |
|
686 } |
|
687 |
|
688 $destination = isset($element['#upload_location']) ? $element['#upload_location'] : NULL; |
|
689 if (isset($destination) && !file_prepare_directory($destination, FILE_CREATE_DIRECTORY)) { |
|
690 watchdog('file', 'The upload directory %directory for the file field !name could not be created or is not accessible. A newly uploaded file could not be saved in this directory as a consequence, and the upload was canceled.', array('%directory' => $destination, '!name' => $element['#field_name'])); |
|
691 form_set_error($upload_name, t('The file could not be uploaded.')); |
|
692 return FALSE; |
|
693 } |
|
694 |
|
695 if (!$file = file_save_upload($upload_name, $element['#upload_validators'], $destination)) { |
|
696 watchdog('file', 'The file upload failed. %upload', array('%upload' => $upload_name)); |
|
697 form_set_error($upload_name, t('The file in the !name field was unable to be uploaded.', array('!name' => $element['#title']))); |
|
698 return FALSE; |
|
699 } |
|
700 |
|
701 return $file; |
|
702 } |
|
703 |
|
704 /** |
|
705 * Returns HTML for a managed file element. |
|
706 * |
|
707 * @param $variables |
|
708 * An associative array containing: |
|
709 * - element: A render element representing the file. |
|
710 * |
|
711 * @ingroup themeable |
|
712 */ |
|
713 function theme_file_managed_file($variables) { |
|
714 $element = $variables['element']; |
|
715 |
|
716 $attributes = array(); |
|
717 if (isset($element['#id'])) { |
|
718 $attributes['id'] = $element['#id']; |
|
719 } |
|
720 if (!empty($element['#attributes']['class'])) { |
|
721 $attributes['class'] = (array) $element['#attributes']['class']; |
|
722 } |
|
723 $attributes['class'][] = 'form-managed-file'; |
|
724 |
|
725 // This wrapper is required to apply JS behaviors and CSS styling. |
|
726 $output = ''; |
|
727 $output .= '<div' . drupal_attributes($attributes) . '>'; |
|
728 $output .= drupal_render_children($element); |
|
729 $output .= '</div>'; |
|
730 return $output; |
|
731 } |
|
732 |
|
733 /** |
|
734 * #pre_render callback to hide display of the upload or remove controls. |
|
735 * |
|
736 * Upload controls are hidden when a file is already uploaded. Remove controls |
|
737 * are hidden when there is no file attached. Controls are hidden here instead |
|
738 * of in file_managed_file_process(), because #access for these buttons depends |
|
739 * on the managed_file element's #value. See the documentation of form_builder() |
|
740 * for more detailed information about the relationship between #process, |
|
741 * #value, and #access. |
|
742 * |
|
743 * Because #access is set here, it affects display only and does not prevent |
|
744 * JavaScript or other untrusted code from submitting the form as though access |
|
745 * were enabled. The form processing functions for these elements should not |
|
746 * assume that the buttons can't be "clicked" just because they are not |
|
747 * displayed. |
|
748 * |
|
749 * @see file_managed_file_process() |
|
750 * @see form_builder() |
|
751 */ |
|
752 function file_managed_file_pre_render($element) { |
|
753 // If we already have a file, we don't want to show the upload controls. |
|
754 if (!empty($element['#value']['fid'])) { |
|
755 $element['upload']['#access'] = FALSE; |
|
756 $element['upload_button']['#access'] = FALSE; |
|
757 } |
|
758 // If we don't already have a file, there is nothing to remove. |
|
759 else { |
|
760 $element['remove_button']['#access'] = FALSE; |
|
761 } |
|
762 return $element; |
|
763 } |
|
764 |
|
765 /** |
|
766 * Returns HTML for a link to a file. |
|
767 * |
|
768 * @param $variables |
|
769 * An associative array containing: |
|
770 * - file: A file object to which the link will be created. |
|
771 * - icon_directory: (optional) A path to a directory of icons to be used for |
|
772 * files. Defaults to the value of the "file_icon_directory" variable. |
|
773 * |
|
774 * @ingroup themeable |
|
775 */ |
|
776 function theme_file_link($variables) { |
|
777 $file = $variables['file']; |
|
778 $icon_directory = $variables['icon_directory']; |
|
779 |
|
780 $url = file_create_url($file->uri); |
|
781 |
|
782 // Human-readable names, for use as text-alternatives to icons. |
|
783 $mime_name = array( |
|
784 'application/msword' => t('Microsoft Office document icon'), |
|
785 'application/vnd.ms-excel' => t('Office spreadsheet icon'), |
|
786 'application/vnd.ms-powerpoint' => t('Office presentation icon'), |
|
787 'application/pdf' => t('PDF icon'), |
|
788 'video/quicktime' => t('Movie icon'), |
|
789 'audio/mpeg' => t('Audio icon'), |
|
790 'audio/wav' => t('Audio icon'), |
|
791 'image/jpeg' => t('Image icon'), |
|
792 'image/png' => t('Image icon'), |
|
793 'image/gif' => t('Image icon'), |
|
794 'application/zip' => t('Package icon'), |
|
795 'text/html' => t('HTML icon'), |
|
796 'text/plain' => t('Plain text icon'), |
|
797 'application/octet-stream' => t('Binary Data'), |
|
798 ); |
|
799 |
|
800 $mimetype = file_get_mimetype($file->uri); |
|
801 |
|
802 $icon = theme('file_icon', array( |
|
803 'file' => $file, |
|
804 'icon_directory' => $icon_directory, |
|
805 'alt' => !empty($mime_name[$mimetype]) ? $mime_name[$mimetype] : t('File'), |
|
806 )); |
|
807 |
|
808 // Set options as per anchor format described at |
|
809 // http://microformats.org/wiki/file-format-examples |
|
810 $options = array( |
|
811 'attributes' => array( |
|
812 'type' => $file->filemime . '; length=' . $file->filesize, |
|
813 ), |
|
814 ); |
|
815 |
|
816 // Use the description as the link text if available. |
|
817 if (empty($file->description)) { |
|
818 $link_text = $file->filename; |
|
819 } |
|
820 else { |
|
821 $link_text = $file->description; |
|
822 $options['attributes']['title'] = check_plain($file->filename); |
|
823 } |
|
824 |
|
825 return '<span class="file">' . $icon . ' ' . l($link_text, $url, $options) . '</span>'; |
|
826 } |
|
827 |
|
828 /** |
|
829 * Returns HTML for an image with an appropriate icon for the given file. |
|
830 * |
|
831 * @param $variables |
|
832 * An associative array containing: |
|
833 * - file: A file object for which to make an icon. |
|
834 * - icon_directory: (optional) A path to a directory of icons to be used for |
|
835 * files. Defaults to the value of the "file_icon_directory" variable. |
|
836 * - alt: (optional) The alternative text to represent the icon in text-based |
|
837 * browsers. Defaults to an empty string. |
|
838 * |
|
839 * @ingroup themeable |
|
840 */ |
|
841 function theme_file_icon($variables) { |
|
842 $file = $variables['file']; |
|
843 $alt = $variables['alt']; |
|
844 $icon_directory = $variables['icon_directory']; |
|
845 |
|
846 $mime = check_plain($file->filemime); |
|
847 $icon_url = file_icon_url($file, $icon_directory); |
|
848 return '<img class="file-icon" alt="' . check_plain($alt) . '" title="' . $mime . '" src="' . $icon_url . '" />'; |
|
849 } |
|
850 |
|
851 /** |
|
852 * Creates a URL to the icon for a file object. |
|
853 * |
|
854 * @param $file |
|
855 * A file object. |
|
856 * @param $icon_directory |
|
857 * (optional) A path to a directory of icons to be used for files. Defaults to |
|
858 * the value of the "file_icon_directory" variable. |
|
859 * |
|
860 * @return |
|
861 * A URL string to the icon, or FALSE if an appropriate icon cannot be found. |
|
862 */ |
|
863 function file_icon_url($file, $icon_directory = NULL) { |
|
864 if ($icon_path = file_icon_path($file, $icon_directory)) { |
|
865 return base_path() . $icon_path; |
|
866 } |
|
867 return FALSE; |
|
868 } |
|
869 |
|
870 /** |
|
871 * Creates a path to the icon for a file object. |
|
872 * |
|
873 * @param $file |
|
874 * A file object. |
|
875 * @param $icon_directory |
|
876 * (optional) A path to a directory of icons to be used for files. Defaults to |
|
877 * the value of the "file_icon_directory" variable. |
|
878 * |
|
879 * @return |
|
880 * A string to the icon as a local path, or FALSE if an appropriate icon could |
|
881 * not be found. |
|
882 */ |
|
883 function file_icon_path($file, $icon_directory = NULL) { |
|
884 // Use the default set of icons if none specified. |
|
885 if (!isset($icon_directory)) { |
|
886 $icon_directory = variable_get('file_icon_directory', drupal_get_path('module', 'file') . '/icons'); |
|
887 } |
|
888 |
|
889 // If there's an icon matching the exact mimetype, go for it. |
|
890 $dashed_mime = strtr($file->filemime, array('/' => '-')); |
|
891 $icon_path = $icon_directory . '/' . $dashed_mime . '.png'; |
|
892 if (file_exists($icon_path)) { |
|
893 return $icon_path; |
|
894 } |
|
895 |
|
896 // For a few mimetypes, we can "manually" map to a generic icon. |
|
897 $generic_mime = (string) file_icon_map($file); |
|
898 $icon_path = $icon_directory . '/' . $generic_mime . '.png'; |
|
899 if ($generic_mime && file_exists($icon_path)) { |
|
900 return $icon_path; |
|
901 } |
|
902 |
|
903 // Use generic icons for each category that provides such icons. |
|
904 foreach (array('audio', 'image', 'text', 'video') as $category) { |
|
905 if (strpos($file->filemime, $category . '/') === 0) { |
|
906 $icon_path = $icon_directory . '/' . $category . '-x-generic.png'; |
|
907 if (file_exists($icon_path)) { |
|
908 return $icon_path; |
|
909 } |
|
910 } |
|
911 } |
|
912 |
|
913 // Try application-octet-stream as last fallback. |
|
914 $icon_path = $icon_directory . '/application-octet-stream.png'; |
|
915 if (file_exists($icon_path)) { |
|
916 return $icon_path; |
|
917 } |
|
918 |
|
919 // No icon can be found. |
|
920 return FALSE; |
|
921 } |
|
922 |
|
923 /** |
|
924 * Determines the generic icon MIME package based on a file's MIME type. |
|
925 * |
|
926 * @param $file |
|
927 * A file object. |
|
928 * |
|
929 * @return |
|
930 * The generic icon MIME package expected for this file. |
|
931 */ |
|
932 function file_icon_map($file) { |
|
933 switch ($file->filemime) { |
|
934 // Word document types. |
|
935 case 'application/msword': |
|
936 case 'application/vnd.ms-word.document.macroEnabled.12': |
|
937 case 'application/vnd.oasis.opendocument.text': |
|
938 case 'application/vnd.oasis.opendocument.text-template': |
|
939 case 'application/vnd.oasis.opendocument.text-master': |
|
940 case 'application/vnd.oasis.opendocument.text-web': |
|
941 case 'application/vnd.openxmlformats-officedocument.wordprocessingml.document': |
|
942 case 'application/vnd.stardivision.writer': |
|
943 case 'application/vnd.sun.xml.writer': |
|
944 case 'application/vnd.sun.xml.writer.template': |
|
945 case 'application/vnd.sun.xml.writer.global': |
|
946 case 'application/vnd.wordperfect': |
|
947 case 'application/x-abiword': |
|
948 case 'application/x-applix-word': |
|
949 case 'application/x-kword': |
|
950 case 'application/x-kword-crypt': |
|
951 return 'x-office-document'; |
|
952 |
|
953 // Spreadsheet document types. |
|
954 case 'application/vnd.ms-excel': |
|
955 case 'application/vnd.ms-excel.sheet.macroEnabled.12': |
|
956 case 'application/vnd.oasis.opendocument.spreadsheet': |
|
957 case 'application/vnd.oasis.opendocument.spreadsheet-template': |
|
958 case 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet': |
|
959 case 'application/vnd.stardivision.calc': |
|
960 case 'application/vnd.sun.xml.calc': |
|
961 case 'application/vnd.sun.xml.calc.template': |
|
962 case 'application/vnd.lotus-1-2-3': |
|
963 case 'application/x-applix-spreadsheet': |
|
964 case 'application/x-gnumeric': |
|
965 case 'application/x-kspread': |
|
966 case 'application/x-kspread-crypt': |
|
967 return 'x-office-spreadsheet'; |
|
968 |
|
969 // Presentation document types. |
|
970 case 'application/vnd.ms-powerpoint': |
|
971 case 'application/vnd.ms-powerpoint.presentation.macroEnabled.12': |
|
972 case 'application/vnd.oasis.opendocument.presentation': |
|
973 case 'application/vnd.oasis.opendocument.presentation-template': |
|
974 case 'application/vnd.openxmlformats-officedocument.presentationml.presentation': |
|
975 case 'application/vnd.stardivision.impress': |
|
976 case 'application/vnd.sun.xml.impress': |
|
977 case 'application/vnd.sun.xml.impress.template': |
|
978 case 'application/x-kpresenter': |
|
979 return 'x-office-presentation'; |
|
980 |
|
981 // Compressed archive types. |
|
982 case 'application/zip': |
|
983 case 'application/x-zip': |
|
984 case 'application/stuffit': |
|
985 case 'application/x-stuffit': |
|
986 case 'application/x-7z-compressed': |
|
987 case 'application/x-ace': |
|
988 case 'application/x-arj': |
|
989 case 'application/x-bzip': |
|
990 case 'application/x-bzip-compressed-tar': |
|
991 case 'application/x-compress': |
|
992 case 'application/x-compressed-tar': |
|
993 case 'application/x-cpio-compressed': |
|
994 case 'application/x-deb': |
|
995 case 'application/x-gzip': |
|
996 case 'application/x-java-archive': |
|
997 case 'application/x-lha': |
|
998 case 'application/x-lhz': |
|
999 case 'application/x-lzop': |
|
1000 case 'application/x-rar': |
|
1001 case 'application/x-rpm': |
|
1002 case 'application/x-tzo': |
|
1003 case 'application/x-tar': |
|
1004 case 'application/x-tarz': |
|
1005 case 'application/x-tgz': |
|
1006 return 'package-x-generic'; |
|
1007 |
|
1008 // Script file types. |
|
1009 case 'application/ecmascript': |
|
1010 case 'application/javascript': |
|
1011 case 'application/mathematica': |
|
1012 case 'application/vnd.mozilla.xul+xml': |
|
1013 case 'application/x-asp': |
|
1014 case 'application/x-awk': |
|
1015 case 'application/x-cgi': |
|
1016 case 'application/x-csh': |
|
1017 case 'application/x-m4': |
|
1018 case 'application/x-perl': |
|
1019 case 'application/x-php': |
|
1020 case 'application/x-ruby': |
|
1021 case 'application/x-shellscript': |
|
1022 case 'text/vnd.wap.wmlscript': |
|
1023 case 'text/x-emacs-lisp': |
|
1024 case 'text/x-haskell': |
|
1025 case 'text/x-literate-haskell': |
|
1026 case 'text/x-lua': |
|
1027 case 'text/x-makefile': |
|
1028 case 'text/x-matlab': |
|
1029 case 'text/x-python': |
|
1030 case 'text/x-sql': |
|
1031 case 'text/x-tcl': |
|
1032 return 'text-x-script'; |
|
1033 |
|
1034 // HTML aliases. |
|
1035 case 'application/xhtml+xml': |
|
1036 return 'text-html'; |
|
1037 |
|
1038 // Executable types. |
|
1039 case 'application/x-macbinary': |
|
1040 case 'application/x-ms-dos-executable': |
|
1041 case 'application/x-pef-executable': |
|
1042 return 'application-x-executable'; |
|
1043 |
|
1044 default: |
|
1045 return FALSE; |
|
1046 } |
|
1047 } |
|
1048 |
|
1049 /** |
|
1050 * @defgroup file-module-api File module public API functions |
|
1051 * @{ |
|
1052 * These functions may be used to determine if and where a file is in use. |
|
1053 */ |
|
1054 |
|
1055 /** |
|
1056 * Retrieves a list of references to a file. |
|
1057 * |
|
1058 * @param $file |
|
1059 * A file object. |
|
1060 * @param $field |
|
1061 * (optional) A field array to be used for this check. If given, limits the |
|
1062 * reference check to the given field. |
|
1063 * @param $age |
|
1064 * (optional) A constant that specifies which references to count. Use |
|
1065 * FIELD_LOAD_REVISION to retrieve all references within all revisions or |
|
1066 * FIELD_LOAD_CURRENT to retrieve references only in the current revisions. |
|
1067 * @param $field_type |
|
1068 * (optional) The name of a field type. If given, limits the reference check |
|
1069 * to fields of the given type. |
|
1070 * |
|
1071 * @return |
|
1072 * An integer value. |
|
1073 */ |
|
1074 function file_get_file_references($file, $field = NULL, $age = FIELD_LOAD_REVISION, $field_type = 'file') { |
|
1075 $references = drupal_static(__FUNCTION__, array()); |
|
1076 $fields = isset($field) ? array($field['field_name'] => $field) : field_info_fields(); |
|
1077 |
|
1078 foreach ($fields as $field_name => $file_field) { |
|
1079 if ((empty($field_type) || $file_field['type'] == $field_type) && !isset($references[$field_name])) { |
|
1080 // Get each time this file is used within a field. |
|
1081 $query = new EntityFieldQuery(); |
|
1082 $query |
|
1083 ->fieldCondition($file_field, 'fid', $file->fid) |
|
1084 ->age($age); |
|
1085 $references[$field_name] = $query->execute(); |
|
1086 } |
|
1087 } |
|
1088 |
|
1089 return isset($field) ? $references[$field['field_name']] : array_filter($references); |
|
1090 } |
|
1091 |
|
1092 /** |
|
1093 * @} End of "defgroup file-module-api". |
|
1094 */ |