653 lines
23 KiB
PHP
653 lines
23 KiB
PHP
<?php
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// $Id$
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/**
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* @file
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* Hooks provided by the Node module.
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*/
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/**
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* @addtogroup hooks
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* @{
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*/
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/**
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* Inform the node access system what permissions the user has.
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*
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* This hook is for implementation by node access modules. In addition to
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* managing access rights for nodes, the node access module must tell
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* the node access system what 'grant IDs' the current user has. In many
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* cases, the grant IDs will simply be role IDs, but grant IDs can be
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* arbitrary based upon the module.
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*
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* For example, modules can maintain their own lists of users, where each
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* list has an ID. In that case, the module could return a list of all
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* IDs of all lists that the current user is a member of.
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*
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* A node access module may implement as many realms as necessary to
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* properly define the access privileges for the nodes.
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*
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* @param $user
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* The user object whose grants are requested.
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* @param $op
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* The node operation to be performed, such as "view", "update", or "delete".
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* @return
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* An array whose keys are "realms" of grants such as "user" or "role", and
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* whose values are linear lists of grant IDs.
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*
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* For a detailed example, see node_access_example.module.
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*
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* @ingroup node_access
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*/
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function hook_node_grants($account, $op) {
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if (user_access('access private content', $account)) {
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$grants['example'] = array(1);
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}
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$grants['example_owner'] = array($user->uid);
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return $grants;
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}
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/**
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* Set permissions for a node to be written to the database.
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*
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* When a node is saved, a module implementing node access will be asked
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* if it is interested in the access permissions to a node. If it is
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* interested, it must respond with an array of array of permissions for that
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* node.
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*
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* Each item in the array should contain:
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*
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* 'realm'
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* This should only be realms for which the module has returned
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* grant IDs in hook_node_grants.
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* 'gid'
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* This is a 'grant ID', which can have an arbitrary meaning per realm.
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* 'grant_view'
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* If set to TRUE a user with the gid in the realm can view this node.
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* 'grant_edit'
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* If set to TRUE a user with the gid in the realm can edit this node.
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* 'grant_delete'
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* If set to TRUE a user with the gid in the realm can delete this node.
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* 'priority'
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* If multiple modules seek to set permissions on a node, the realms
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* that have the highest priority will win out, and realms with a lower
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* priority will not be written. If there is any doubt, it is best to
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* leave this 0.
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*
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* @ingroup node_access
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*/
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function hook_node_access_records($node) {
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if (node_access_example_disabling()) {
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return;
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}
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// We only care about the node if it's been marked private. If not, it is
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// treated just like any other node and we completely ignore it.
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if ($node->private) {
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$grants = array();
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$grants[] = array(
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'realm' => 'example',
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'gid' => TRUE,
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'grant_view' => TRUE,
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'grant_update' => FALSE,
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'grant_delete' => FALSE,
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'priority' => 0,
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);
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// For the example_author array, the GID is equivalent to a UID, which
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// means there are many many groups of just 1 user.
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$grants[] = array(
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'realm' => 'example_author',
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'gid' => $node->uid,
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'grant_view' => TRUE,
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'grant_update' => TRUE,
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'grant_delete' => TRUE,
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'priority' => 0,
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);
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return $grants;
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}
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}
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/**
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* Add mass node operations.
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*
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* This hook enables modules to inject custom operations into the mass operations
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* dropdown found at admin/content/node, by associating a callback function with
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* the operation, which is called when the form is submitted. The callback function
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* receives one initial argument, which is an array of the checked nodes.
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*
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* @return
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* An array of operations. Each operation is an associative array that may
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* contain the following key-value pairs:
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* - "label": Required. The label for the operation, displayed in the dropdown menu.
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* - "callback": Required. The function to call for the operation.
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* - "callback arguments": Optional. An array of additional arguments to pass to
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* the callback function.
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*
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*/
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function hook_node_operations() {
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$operations = array(
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'approve' => array(
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'label' => t('Approve the selected posts'),
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'callback' => 'node_operations_approve',
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),
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'promote' => array(
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'label' => t('Promote the selected posts'),
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'callback' => 'node_operations_promote',
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),
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'sticky' => array(
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'label' => t('Make the selected posts sticky'),
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'callback' => 'node_operations_sticky',
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),
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'demote' => array(
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'label' => t('Demote the selected posts'),
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'callback' => 'node_operations_demote',
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),
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'unpublish' => array(
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'label' => t('Unpublish the selected posts'),
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'callback' => 'node_operations_unpublish',
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),
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'delete' => array(
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'label' => t('Delete the selected posts'),
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),
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);
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return $operations;
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}
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/**
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* Act on nodes defined by other modules.
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*
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* Despite what its name might make you think, hook_nodeapi() is not
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* reserved for node modules. On the contrary, it allows modules to react
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* to actions affecting all kinds of nodes, regardless of whether that
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* module defined the node.
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*
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* It is common to find hook_nodeapi() used in conjunction with
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* hook_form_alter(). Modules use hook_form_alter() to place additional form
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* elements onto the node edit form, and hook_nodeapi() is used to read and
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* write those values to and from the database.
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*
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* @param &$node
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* The node the action is being performed on.
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* @param $op
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* What kind of action is being performed. Possible values:
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* - "alter": the $node->content array has been rendered, so the node body or
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* teaser is filtered and now contains HTML. This op should only be used when
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* text substitution, filtering, or other raw text operations are necessary.
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* - "delete": The node is being deleted.
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* - "delete_revision": The revision of the node is deleted. You can delete data
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* associated with that revision.
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* - "insert": The node is being created (inserted in the database).
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* - "load": The node is about to be loaded from the database. This hook
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* can be used to load additional data at this time.
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* - "prepare": The node is about to be shown on the add/edit form.
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* - "prepare_translation": The node is being cloned for translation. Load
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* additional data or copy values from $node->translation_source.
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* - "print": Prepare a node view for printing. Used for printer-friendly
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* view in book_module
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* - "rss_item": An RSS feed is generated. The module can return properties
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* to be added to the RSS item generated for this node. See comment_nodeapi()
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* and upload_nodeapi() for examples. The $node passed can also be modified
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* to add or remove contents to the feed item.
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* - "search_result": The node is displayed as a search result. If you
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* want to display extra information with the result, return it.
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* - "presave": The node passed validation and is about to be saved. Modules may
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* use this to make changes to the node before it is saved to the database.
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* - "update": The node is being updated.
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* - "update_index": The node is being indexed. If you want additional
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* information to be indexed which is not already visible through
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* nodeapi "view", then you should return it here.
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* - "validate": The user has just finished editing the node and is
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* trying to preview or submit it. This hook can be used to check
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* the node data. Errors should be set with form_set_error().
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* - "view": The node content is being assembled before rendering. The module
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* may add elements $node->content prior to rendering. This hook will be
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* called after hook_view(). The format of $node->content is the same as
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* used by Forms API.
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* @param $a3
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* - For "view", passes in the $teaser parameter from node_view().
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* - For "validate", passes in the $form parameter from node_validate().
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* @param $a4
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* - For "view", passes in the $page parameter from node_view().
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* @return
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* This varies depending on the operation.
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* - The "presave", "insert", "update", "delete", "print" and "view"
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* operations have no return value.
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* - The "load" operation should return an array containing pairs
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* of fields => values to be merged into the node object.
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*
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* If you are writing a node module, do not use this hook to perform
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* actions on your type of node alone. Instead, use the hooks set aside
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* for node modules, such as hook_insert() and hook_form(). That said, for
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* some operations, such as "delete_revision" or "rss_item" there is no
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* corresponding hook so even the module defining the node will need to
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* implement hook_nodeapi().
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*/
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function hook_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
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switch ($op) {
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case 'presave':
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if ($node->nid && $node->moderate) {
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// Reset votes when node is updated:
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$node->score = 0;
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$node->users = '';
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$node->votes = 0;
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}
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break;
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case 'insert':
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case 'update':
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if ($node->moderate && user_access('access submission queue')) {
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drupal_set_message(t('The post is queued for approval'));
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}
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elseif ($node->moderate) {
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drupal_set_message(t('The post is queued for approval. The editors will decide whether it should be published.'));
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}
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break;
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case 'view':
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$node->content['my_additional_field'] = array(
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'#value' => theme('mymodule_my_additional_field', $additional_field),
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'#weight' => 10,
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);
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break;
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}
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}
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/**
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* Define module-provided node types.
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*
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* This is a hook used by node modules. This hook is required for modules to
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* define one or more node types. It is called to determine the names and the
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* attributes of a module's node types.
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*
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* Only module-provided node types should be defined through this hook. User-
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* provided (or 'custom') node types should be defined only in the 'node_type'
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* database table, and should be maintained by using the node_type_save() and
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* node_type_delete() functions.
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*
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* @return
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* An array of information on the module's node types. The array contains a
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* sub-array for each node type, with the machine-readable type name as the
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* key. Each sub-array has up to 10 attributes. Possible attributes:
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* - "name": the human-readable name of the node type. Required.
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* - "module": a string telling Drupal how a module's functions map to hooks
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* (i.e. if module is defined as example_foo, then example_foo_insert will
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* be called when inserting a node of that type). This string is usually
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* the name of the module in question, but not always. Required.
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* - "description": a brief description of the node type. Required.
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* - "help": text that will be displayed at the top of the submission form for
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* this content type. Optional (defaults to '').
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* - "has_title": boolean indicating whether or not this node type has a title
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* field. Optional (defaults to TRUE).
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* - "title_label": the label for the title field of this content type.
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* Optional (defaults to 'Title').
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* - "has_body": boolean indicating whether or not this node type has a body
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* field. Optional (defaults to TRUE).
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* - "body_label": the label for the body field of this content type. Optional
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* (defaults to 'Body').
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* - "min_word_count": the minimum number of words for the body field to be
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* considered valid for this content type. Optional (defaults to 0).
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* - "locked": boolean indicating whether the machine-readable name of this
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* content type can (FALSE) or cannot (TRUE) be edited by a site
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* administrator. Optional (defaults to TRUE).
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*
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* The machine-readable name of a node type should contain only letters,
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* numbers, and underscores. Underscores will be converted into hyphens for the
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* purpose of contructing URLs.
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*
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* All attributes of a node type that are defined through this hook (except for
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* 'locked') can be edited by a site administrator. This includes the
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* machine-readable name of a node type, if 'locked' is set to FALSE.
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*
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* For a detailed usage example, see node_example.module.
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*/
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function hook_node_info() {
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return array(
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'book' => array(
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'name' => t('book page'),
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'module' => 'book',
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'description' => t("A book is a collaborative writing effort: users can collaborate writing the pages of the book, positioning the pages in the right order, and reviewing or modifying pages previously written. So when you have some information to share or when you read a page of the book and you didn't like it, or if you think a certain page could have been written better, you can do something about it."),
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)
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);
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}
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/**
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* Act on node type changes.
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*
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* This hook allows modules to take action when a node type is modified.
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*
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* @param $op
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* What is being done to $info. Possible values:
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* - "delete"
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* - "insert"
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* - "update"
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* @param $info
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* The node type object on which $op is being performed.
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* @return
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* None.
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*/
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function hook_node_type($op, $info) {
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switch ($op) {
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case 'delete':
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variable_del('comment_' . $info->type);
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break;
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case 'update':
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if (!empty($info->old_type) && $info->old_type != $info->type) {
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$setting = variable_get('comment_' . $info->old_type, COMMENT_NODE_READ_WRITE);
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variable_del('comment_' . $info->old_type);
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variable_set('comment_' . $info->type, $setting);
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}
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break;
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}
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}
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/**
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* Define access restrictions.
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*
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* This hook allows node modules to limit access to the node types they
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* define.
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*
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* @param $op
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* The operation to be performed. Possible values:
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* - "create"
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* - "delete"
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* - "update"
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* - "view"
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* @param $node
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* The node on which the operation is to be performed, or, if it does
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* not yet exist, the type of node to be created.
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* @param $account
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* A user object representing the user for whom the operation is to be
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* performed.
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* @return
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* TRUE if the operation is to be allowed;
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* FALSE if the operation is to be denied;
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* NULL to not override the settings in the node_access table, or access
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* control modules.
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*
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* The administrative account (user ID #1) always passes any access check,
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* so this hook is not called in that case. If this hook is not defined for
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* a node type, all access checks will fail, so only the administrator will
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* be able to see content of that type. However, users with the "administer
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* nodes" permission may always view and edit content through the
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* administrative interface.
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* @see http://api.drupal.org/api/group/node_access/7
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*
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* For a detailed usage example, see node_example.module.
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*
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* @ingroup node_access
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*/
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function hook_access($op, $node, $account) {
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if ($op == 'create') {
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return user_access('create stories', $account);
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}
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if ($op == 'update' || $op == 'delete') {
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if (user_access('edit own stories', $account) && ($account->uid == $node->uid)) {
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return TRUE;
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}
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}
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}
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/**
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* Respond to node deletion.
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*
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* This is a hook used by node modules. It is called to allow the module
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* to take action when a node is being deleted from the database by, for
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* example, deleting information from related tables.
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*
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* @param &$node
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* The node being deleted.
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* @return
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* None.
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*
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* To take action when nodes of any type are deleted (not just nodes of
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* the type defined by this module), use hook_nodeapi() instead.
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*
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* For a detailed usage example, see node_example.module.
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*/
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function hook_delete(&$node) {
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db_query('DELETE FROM {mytable} WHERE nid = %d', $node->nid);
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}
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/**
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* This is a hook used by node modules. It is called after load but before the
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* node is shown on the add/edit form.
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*
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* @param &$node
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* The node being saved.
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* @return
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* None.
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*
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* For a usage example, see image.module.
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*/
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function hook_prepare(&$node) {
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if ($file = file_check_upload($field_name)) {
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$file = file_save_upload($field_name, _image_filename($file->filename, NULL, TRUE));
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if ($file) {
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if (!image_get_info($file->filepath)) {
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form_set_error($field_name, t('Uploaded file is not a valid image'));
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return;
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}
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}
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else {
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return;
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}
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$node->images['_original'] = $file->filepath;
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_image_build_derivatives($node, true);
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$node->new_file = TRUE;
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}
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}
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/**
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* Display a node editing form.
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*
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* This hook, implemented by node modules, is called to retrieve the form
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* that is displayed when one attempts to "create/edit" an item. This form is
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* displayed at the URI http://www.example.com/?q=node/<add|edit>/nodetype.
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*
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* @param &$node
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* The node being added or edited.
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* @param $form_state
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* The form state array. Changes made to this variable will have no effect.
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* @return
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* An array containing the form elements to be displayed in the node
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* edit form.
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*
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* The submit and preview buttons, taxonomy controls, and administrative
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* accoutrements are displayed automatically by node.module. This hook
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* needs to return the node title, the body text area, and fields
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* specific to the node type.
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*
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* For a detailed usage example, see node_example.module.
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*/
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function hook_form(&$node, $form_state) {
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$type = node_get_types('type', $node);
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$form['title'] = array(
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'#type' => 'textfield',
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'#title' => check_plain($type->title_label),
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'#required' => TRUE,
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);
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$form['body'] = array(
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'#type' => 'textarea',
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'#title' => check_plain($type->body_label),
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'#rows' => 20,
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'#required' => TRUE,
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);
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$form['field1'] = array(
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'#type' => 'textfield',
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'#title' => t('Custom field'),
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'#default_value' => $node->field1,
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'#maxlength' => 127,
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);
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$form['selectbox'] = array(
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'#type' => 'select',
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'#title' => t('Select box'),
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'#default_value' => $node->selectbox,
|
|
'#options' => array(
|
|
1 => 'Option A',
|
|
2 => 'Option B',
|
|
3 => 'Option C',
|
|
),
|
|
'#description' => t('Please choose an option.'),
|
|
);
|
|
|
|
return $form;
|
|
}
|
|
|
|
/**
|
|
* Respond to node insertion.
|
|
*
|
|
* This is a hook used by node modules. It is called to allow the module
|
|
* to take action when a new node is being inserted in the database by,
|
|
* for example, inserting information into related tables.
|
|
*
|
|
* @param $node
|
|
* The node being inserted.
|
|
* @return
|
|
* None.
|
|
*
|
|
* To take action when nodes of any type are inserted (not just nodes of
|
|
* the type(s) defined by this module), use hook_nodeapi() instead.
|
|
*
|
|
* For a detailed usage example, see node_example.module.
|
|
*/
|
|
function hook_insert($node) {
|
|
db_query("INSERT INTO {mytable} (nid, extra)
|
|
VALUES (%d, '%s')", $node->nid, $node->extra);
|
|
}
|
|
|
|
/**
|
|
* Load node-type-specific information.
|
|
*
|
|
* This is a hook used by node modules. It is called to allow the module
|
|
* a chance to load extra information that it stores about a node, or
|
|
* possibly replace already loaded information - which can be dangerous.
|
|
*
|
|
* @param $node
|
|
* The node being loaded. At call time, node.module has already loaded
|
|
* the basic information about the node, such as its node ID (nid),
|
|
* title, and body.
|
|
* @return
|
|
* An object containing properties of the node being loaded. This will
|
|
* be merged with the passed-in $node to result in an object containing
|
|
* a set of properties resulting from adding the extra properties to
|
|
* the passed-in ones, and overwriting the passed-in ones with the
|
|
* extra properties if they have the same name as passed-in properties.
|
|
*
|
|
* For a detailed usage example, see node_example.module.
|
|
*/
|
|
function hook_load($node) {
|
|
$additions = db_fetch_object(db_query('SELECT * FROM {mytable} WHERE vid = %d', $node->vid));
|
|
return $additions;
|
|
}
|
|
|
|
/**
|
|
* Respond to node updating.
|
|
*
|
|
* This is a hook used by node modules. It is called to allow the module
|
|
* to take action when an edited node is being updated in the database by,
|
|
* for example, updating information in related tables.
|
|
*
|
|
* @param $node
|
|
* The node being updated.
|
|
* @return
|
|
* None.
|
|
*
|
|
* To take action when nodes of any type are updated (not just nodes of
|
|
* the type(s) defined by this module), use hook_nodeapi() instead.
|
|
*
|
|
* For a detailed usage example, see node_example.module.
|
|
*/
|
|
function hook_update($node) {
|
|
db_query("UPDATE {mytable} SET extra = '%s' WHERE nid = %d",
|
|
$node->extra, $node->nid);
|
|
}
|
|
|
|
/**
|
|
* Verify a node editing form.
|
|
*
|
|
* This is a hook used by node modules. It is called to allow the module
|
|
* to verify that the node is in a format valid to post to the site.
|
|
* Errors should be set with form_set_error().
|
|
*
|
|
* @param $node
|
|
* The node to be validated.
|
|
* @param $form
|
|
* The node edit form array.
|
|
* @return
|
|
* None.
|
|
*
|
|
* To validate nodes of all types (not just nodes of the type(s) defined by
|
|
* this module), use hook_nodeapi() instead.
|
|
*
|
|
* Changes made to the $node object within a hook_validate() function will
|
|
* have no effect. The preferred method to change a node's content is to use
|
|
* hook_submit() or hook_nodeapi($op='submit') instead. If it is really
|
|
* necessary to change the node at the validate stage, you can use function
|
|
* form_set_value().
|
|
*
|
|
* For a detailed usage example, see node_example.module.
|
|
*/
|
|
function hook_validate($node, &$form) {
|
|
if (isset($node->end) && isset($node->start)) {
|
|
if ($node->start > $node->end) {
|
|
form_set_error('time', t('An event may not end before it starts.'));
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Display a node.
|
|
*
|
|
* This is a hook used by node modules. It allows a module to define a
|
|
* custom method of displaying its nodes, usually by displaying extra
|
|
* information particular to that node type.
|
|
*
|
|
* @param $node
|
|
* The node to be displayed.
|
|
* @param $teaser
|
|
* Whether we are to generate a "teaser" or summary of the node, rather than
|
|
* display the whole thing.
|
|
* @param $page
|
|
* Whether the node is being displayed as a standalone page. If this is
|
|
* TRUE, the node title should not be displayed, as it will be printed
|
|
* automatically by the theme system. Also, the module may choose to alter
|
|
* the default breadcrumb trail in this case.
|
|
* @return
|
|
* $node. The passed $node parameter should be modified as necessary and
|
|
* returned so it can be properly presented. Nodes are prepared for display
|
|
* by assembling a structured array in $node->content, rather than directly
|
|
* manipulating $node->body and $node->teaser. The format of this array is
|
|
* the same used by the Forms API. As with FormAPI arrays, the #weight
|
|
* property can be used to control the relative positions of added elements.
|
|
* If for some reason you need to change the body or teaser returned by
|
|
* node_prepare(), you can modify $node->content['body']['#value']. Note
|
|
* that this will be the un-rendered content. To modify the rendered output,
|
|
* see hook_nodeapi($op = 'alter').
|
|
*
|
|
* For a detailed usage example, see node_example.module.
|
|
*/
|
|
function hook_view($node, $teaser = FALSE, $page = FALSE) {
|
|
if ($page) {
|
|
$breadcrumb = array();
|
|
$breadcrumb[] = array('path' => 'example', 'title' => t('example'));
|
|
$breadcrumb[] = array('path' => 'example/' . $node->field1,
|
|
'title' => t('%category', array('%category' => $node->field1)));
|
|
$breadcrumb[] = array('path' => 'node/' . $node->nid);
|
|
menu_set_location($breadcrumb);
|
|
}
|
|
|
|
$node = node_prepare($node, $teaser);
|
|
$node->content['myfield'] = array(
|
|
'#value' => theme('mymodule_myfield', $node->myfield),
|
|
'#weight' => 1,
|
|
);
|
|
|
|
return $node;
|
|
}
|
|
|
|
/**
|
|
* @} End of "addtogroup hooks".
|
|
*/
|