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60 lines
1.9 KiB
PHP
60 lines
1.9 KiB
PHP
<?php
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/**
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* @file
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* Hooks for file module.
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*/
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/**
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* Control download access to files.
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*
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* The hook is typically implemented to limit access based on the entity the
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* file is referenced, e.g., only users with access to a node should be allowed
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* to download files attached to that node.
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*
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* @param array $file_item
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* The array of information about the file to check access for.
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* @param $entity_type
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* The type of $entity; for example, 'node' or 'user'.
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* @param $entity
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* The $entity to which $file is referenced.
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*
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* @return
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* TRUE is access should be allowed by this entity or FALSE if denied. Note
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* that denial may be overridden by another entity controller, making this
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* grant permissive rather than restrictive.
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*
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* @see hook_field_access().
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*/
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function hook_file_download_access($file_item, $entity_type, $entity) {
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if ($entity_type == 'node') {
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return node_access('view', $entity);
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}
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}
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/**
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* Alter the access rules applied to a file download.
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*
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* Entities that implement file management set the access rules for their
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* individual files. Module may use this hook to create custom access rules
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* for file downloads.
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*
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* @see hook_file_download_access().
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*
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* @param $grants
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* An array of grants gathered by hook_file_download_access(). The array is
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* keyed by the module that defines the entity type's access control; the
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* values are Boolean grant responses for each module.
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* @param array $file_item
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* The array of information about the file to alter access for.
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* @param $entity_type
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* The type of $entity; for example, 'node' or 'user'.
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* @param $entity
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* The $entity to which $file is referenced.
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*/
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function hook_file_download_access_alter(&$grants, $file_item, $entity_type, $entity) {
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// For our example module, we always enforce the rules set by node module.
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if (isset($grants['node'])) {
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$grants = array('node' => $grants['node']);
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}
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}
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