302 lines
8.7 KiB
PHP
302 lines
8.7 KiB
PHP
<?php
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/**
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* @file
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* Documentation of Feeds hooks.
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*/
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/**
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* Feeds offers a CTools based plugin API. Fetchers, parsers and processors are
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* declared to Feeds as plugins.
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*
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* @see feeds_feeds_plugins()
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* @see FeedsFetcher
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* @see FeedsParser
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* @see FeedsProcessor
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*
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* @defgroup pluginapi Plugin API
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* @{
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*/
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/**
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* Example of a CTools plugin hook that needs to be implemented to make
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* hook_feeds_plugins() discoverable by CTools and Feeds. The hook specifies
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* that the hook_feeds_plugins() returns Feeds Plugin API version 1 style
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* plugins.
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*/
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function hook_ctools_plugin_api($owner, $api) {
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if ($owner == 'feeds' && $api == 'plugins') {
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return array('version' => 1);
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}
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}
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/**
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* A hook_feeds_plugins() declares available Fetcher, Parser or Processor
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* plugins to Feeds. For an example look at feeds_feeds_plugin(). For exposing
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* this hook hook_ctools_plugin_api() MUST be implemented, too.
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*
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* @see feeds_feeds_plugin()
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*/
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function hook_feeds_plugins() {
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$info = array();
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$info['MyFetcher'] = array(
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'name' => 'My Fetcher',
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'description' => 'Fetches my stuff.',
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'help' => 'More verbose description here. Will be displayed on fetcher selection menu.',
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'handler' => array(
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'parent' => 'FeedsFetcher',
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'class' => 'MyFetcher',
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'file' => 'MyFetcher.inc',
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'path' => drupal_get_path('module', 'my_module'), // Feeds will look for MyFetcher.inc in the my_module directory.
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),
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);
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$info['MyParser'] = array(
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'name' => 'ODK parser',
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'description' => 'Parse my stuff.',
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'help' => 'More verbose description here. Will be displayed on parser selection menu.',
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'handler' => array(
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'parent' => 'FeedsParser', // Being directly or indirectly an extension of FeedsParser makes a plugin a parser plugin.
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'class' => 'MyParser',
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'file' => 'MyParser.inc',
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'path' => drupal_get_path('module', 'my_module'),
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),
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);
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$info['MyProcessor'] = array(
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'name' => 'ODK parser',
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'description' => 'Process my stuff.',
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'help' => 'More verbose description here. Will be displayed on processor selection menu.',
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'handler' => array(
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'parent' => 'FeedsProcessor',
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'class' => 'MyProcessor',
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'file' => 'MyProcessor.inc',
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'path' => drupal_get_path('module', 'my_module'),
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),
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);
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return $info;
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}
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/**
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* @}
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*/
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/**
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* @defgroup import Import and clear hooks
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* @{
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*/
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/**
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* Invoked after a feed source has been parsed, before it will be processed.
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*
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* @param $source
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* FeedsSource object that describes the source that has been imported.
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* @param $result
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* FeedsParserResult object that has been parsed from the source.
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*/
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function hook_feeds_after_parse(FeedsSource $source, FeedsParserResult $result) {
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// For example, set title of imported content:
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$result->title = 'Import number ' . my_module_import_id();
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}
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/**
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* Invoked before a feed item is saved.
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*
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* @param $source
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* FeedsSource object that describes the source that is being imported.
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* @param $entity
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* The entity object.
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* @param $item
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* The parser result for this entity.
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*/
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function hook_feeds_presave(FeedsSource $source, $entity, $item) {
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if ($entity->feeds_item->entity_type == 'node') {
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// Skip saving this entity.
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$entity->feeds_item->skip = TRUE;
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}
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}
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/**
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* Invoked after a feed source has been imported.
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*
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* @param $source
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* FeedsSource object that describes the source that has been imported.
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*/
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function hook_feeds_after_import(FeedsSource $source) {
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// See geotaxonomy module's implementation for an example.
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}
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/**
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* Invoked after a feed source has been cleared of its items.
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*
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* @param $source
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* FeedsSource object that describes the source that has been cleared.
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*/
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function hook_feeds_after_clear(FeedsSource $source) {
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}
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/**
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* @}
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*/
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/**
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* @defgroup mappingapi Mapping API
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* @{
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*/
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/**
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* Alter mapping sources.
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*
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* Use this hook to add additional mapping sources for any parser. Allows for
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* registering a callback to be invoked at mapping time.
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*
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* @see my_source_get_source().
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* @see locale_feeds_parser_sources_alter().
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*/
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function hook_feeds_parser_sources_alter(&$sources, $content_type) {
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$sources['my_source'] = array(
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'name' => t('Images in description element'),
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'description' => t('Images occuring in the description element of a feed item.'),
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'callback' => 'my_source_get_source',
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);
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}
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/**
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* Example callback specified in hook_feeds_parser_sources_alter().
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*
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* To be invoked on mapping time.
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*
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* @param $source
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* The FeedsSource object being imported.
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* @param $result
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* The FeedsParserResult object being mapped from.
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* @param $key
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* The key specified in the $sources array in
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* hook_feeds_parser_sources_alter().
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*
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* @return
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* The value to be extracted from the source.
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*
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* @see hook_feeds_parser_sources_alter().
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* @see locale_feeds_get_source().
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*/
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function my_source_get_source($source, FeedsParserResult $result, $key) {
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$item = $result->currentItem();
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return my_source_parse_images($item['description']);
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}
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/**
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* Alter mapping targets for entities. Use this hook to add additional target
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* options to the mapping form of Node processors.
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*
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* If the key in $targets[] does not correspond to the actual key on the node
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* object ($node->key), real_target MUST be specified. See mappers/link.inc
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*
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* For an example implementation, see mappers/content.inc
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*
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* @param &$targets
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* Array containing the targets to be offered to the user. Add to this array
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* to expose additional options. Remove from this array to suppress options.
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* Remove with caution.
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* @param $entity_type
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* The entity type of the target, for instance a 'node' entity.
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* @param $bundle_name
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* The bundle name for which to alter targets.
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*/
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function hook_feeds_processor_targets_alter(&$targets, $entity_type, $bundle_name) {
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if ($entity_type == 'node') {
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$targets['my_node_field'] = array(
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'name' => t('My custom node field'),
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'description' => t('Description of what my custom node field does.'),
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'callback' => 'my_module_set_target',
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// Specify both summary_callback and form_callback to add a per mapping
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// configuration form.
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'summary_callback' => 'my_module_summary_callback',
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'form_callback' => 'my_module_form_callback',
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);
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$targets['my_node_field2'] = array(
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'name' => t('My Second custom node field'),
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'description' => t('Description of what my second custom node field does.'),
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'callback' => 'my_module_set_target2',
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'real_target' => 'my_node_field_two', // Specify real target field on node.
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);
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}
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}
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/**
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* Example callback specified in hook_feeds_processor_targets_alter().
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*
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* @param $source
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* Field mapper source settings.
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* @param $entity
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* An entity object, for instance a node object.
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* @param $target
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* A string identifying the target on the node.
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* @param $value
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* The value to populate the target with.
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* @param $mapping
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* Associative array of the mapping settings from the per mapping
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* configuration form.
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*/
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function my_module_set_target($source, $entity, $target, $value, $mapping) {
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$entity->{$target}[$entity->language][0]['value'] = $value;
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if (isset($source->importer->processor->config['input_format'])) {
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$entity->{$target}[$entity->language][0]['format'] =
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$source->importer->processor->config['input_format'];
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}
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}
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/**
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* Example of the summary_callback specified in
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* hook_feeds_processor_targets_alter().
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*
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* @param $mapping
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* Associative array of the mapping settings.
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* @param $target
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* Array of target settings, as defined by the processor or
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* hook_feeds_processor_targets_alter().
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* @param $form
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* The whole mapping form.
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* @param $form_state
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* The form state of the mapping form.
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*
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* @return
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* Returns, as a string that may contain HTML, the summary to display while
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* the full form isn't visible.
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* If the return value is empty, no summary and no option to view the form
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* will be displayed.
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*/
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function my_module_summary_callback($mapping, $target, $form, $form_state) {
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if (empty($mapping['my_setting'])) {
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return t('My setting <strong>not</strong> active');
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}
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else {
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return t('My setting <strong>active</strong>');
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}
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}
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/**
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* Example of the form_callback specified in
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* hook_feeds_processor_targets_alter().
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*
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* The arguments are the same that my_module_summary_callback() gets.
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*
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* @see my_module_summary_callback()
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*
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* @return
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* The per mapping configuration form. Once the form is saved, $mapping will
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* be populated with the form values.
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*/
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function my_module_form_callback($mapping, $target, $form, $form_state) {
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return array(
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'my_setting' => array(
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'#type' => 'checkbox',
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'#title' => t('My setting checkbox'),
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'#default_value' => !empty($mapping['my_setting']),
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),
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);
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}
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/**
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* @}
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*/
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