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<?php
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// $Id: views_fusion.module,v 1.13 2007/04/07 13:55:08 fago Exp $
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/**
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* @file
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* Provides fusing of multiple views.
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*/
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/**
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* Implementation of hook_help().
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*/
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function views_fusion_help($section) {
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switch ($section) {
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case 'admin/build/views/fusion':
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return '<p>'. t('This screen allows the fusion of two views. Select the main view you want to use and then select a second view you would like to "fuse" with the first view. Fields, filters and sorts from the fused view will be intelligently merged into the primary view.') .'</p>';
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}
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}
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/**
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* Implementation of hook_menu().
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*/
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function views_fusion_menu($may_cache) {
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$items = array();
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if ($may_cache) {
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$items[] = array(
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'path' => 'admin/build/views/fusion',
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'title' => t('Fusion'),
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'callback' => 'drupal_get_form',
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'callback arguments' => array('views_fusion_admin'),
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'access' => user_access('administer views'),
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'type' => MENU_LOCAL_TASK,
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);
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}
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return $items;
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}
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function views_fusion_admin() {
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$tables = _views_fusion_get_tables();
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if (!$tables['fields']) {
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return array('msg' => array('#value' => t('If you want to use views fusion you have to activate an appropriate node relation module, e.g. the nodefamily module.')));
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}
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$form = array();
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$form['overview'] = array('#type' => 'markup', '#value' => views_fusion_overview());
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$form['add'] = array('#type' => 'fieldset', '#title' => t('Add another views fusion'));
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$form['add']['vid'] = array(
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'#type' => 'select',
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'#title' => t('primary view'),
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'#options' => _views_fusion_get_views_list(),
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'#required' => true,
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);
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$form['add']['mvid'] = array(
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'#type' => 'select',
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'#title' => t('fuse with view'),
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'#options' => _views_fusion_get_views_list(),
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'#required' => true,
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);
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$form['add']['uses'] = array(
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'#type' => 'select',
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'#title' => t('using'),
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'#options' => $tables['titles'],
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'#required' => true,
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);
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$form['add']['submit'] = array(
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'#type' => 'submit',
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'#value' => t('Add fusion'),
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'#weight' => 10,
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);
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return $form;
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}
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function _views_fusion_get_views_list() {
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$result = db_query("SELECT vid, name FROM {view_view} ORDER BY name");
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$views = array();
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while ($row = db_fetch_object($result)) {
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$views[$row->vid] = $row->name;
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}
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return $views;
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}
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/*
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* Return an array of all tables that can be used for fusing views.
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*
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* To get their tables listed other modules have to implement hook_views_fusion(), which has to
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* return an array where the key is the table name and the value is an array containing the values
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* for a title and the field, which is used to join to the fused view's node table.
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*
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* These tables must be described through hook_views_tables(), so that it's possible to join them.
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*/
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function _views_fusion_get_tables($sort_by_table = false) {
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if ($sort_by_table) {
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static $by_table = array();
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if ($by_table) {
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return $by_table;
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}
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$by_table = module_invoke_all('views_fusion');
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return $by_table;
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}
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static $tables = array();
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if ($tables) {
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return $tables;
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}
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foreach (module_invoke_all('views_fusion') as $table => $array) {
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$titles[$table] = $array['title'];
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$fields[$table] = $array['field'];
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}
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$tables = array('titles' => $titles, 'fields' => $fields);
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return $tables;
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}
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function views_fusion_admin_validate($form_id, &$form_values, &$form) {
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if ($form_values['vid'] == $form_values['mvid']) {
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form_set_error('mvid', t('You have to select two different views.'));
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}
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$fusions = _views_fusion_load(0);
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if ($fusions[$form_values['mvid']]) {
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foreach ($fusions[$form_values['mvid']] as $fusion) {
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if ($fusion->vid == $form_values['vid']) {
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form_set_error('mvid', 'This fusion already exists.');
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}
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}
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}
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views_fusion_check_cycle($form_values['vid'], $form_values['mvid'], $fusions);
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}
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/*
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* Determins if adding the fusion would result in a cycle
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* @param $vid The vid
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* @param $mvid The mvid
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* @param $fusions A array of all fusions sorted by mvid
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*/
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function views_fusion_check_cycle($vid, $mvid, &$fusions) {
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if ($fusions[$vid]) {
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foreach($fusions[$vid] as $fusion) {
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if ($mvid == $fusion->vid) {
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form_set_error('vid', t('You must not add this fusion as it would result in a loop.'));
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}
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else {
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views_fusion_check_cycle($fusion->vid, $mvid, $fusions);
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}
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}
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}
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}
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function views_fusion_admin_submit($form_id, &$form_values) {
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db_query("INSERT INTO {views_fusion} (vid, mvid, uses) VALUES(%d, %d, '%s')",
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$form_values['vid'], $form_values['mvid'], $form_values['uses']);
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//reset caches
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views_invalidate_cache();
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_views_fusion_load(0, TRUE);
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//we need to prevent caching of the primary view
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$view1 = views_get_view($form_values['vid']);
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$view1->no_cache = TRUE;
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_views_save_view($view1);
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}
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/*
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* Displays existing fusions in a table
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*/
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function views_fusion_overview() {
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$result = db_query("SELECT vf.*, v1.name, v2.name as mname FROM {views_fusion} vf ".
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"LEFT JOIN {view_view} v1 ON vf.vid = v1.vid ".
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"LEFT JOIN {view_view} v2 ON vf.mvid = v2.vid");
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if (!db_num_rows($result)) {
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return '';
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}
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if (arg(4) && arg(5)) {
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//delete the fusion
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db_query("DELETE FROM {views_fusion} WHERE vid=%d AND mvid=%d", arg(4), arg(5));
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views_invalidate_cache();
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drupal_set_message('Your fusion has been deleted.');
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drupal_goto('admin/build/views/fusion');
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}
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$header = array(t('primary view'), t('fused view'), t('using'), '');
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$rows = array();
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$tables = _views_fusion_get_tables();
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while ($fusion = db_fetch_object($result)) {
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$rows[] = array($fusion->name, $fusion->mname, $tables['titles'][$fusion->uses],
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l(t('delete'),'admin/build/views/fusion/' . $fusion->vid .'/'. $fusion->mvid));
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}
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return theme('table', $header, $rows, array('class' => 'views_fusion'));
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}
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/*
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* Returns a array of all fusions sorted by vids ($vid = 1) or by mvids ($vid = 0)
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*/
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function _views_fusion_load($vid = 1, $reset = FALSE) {
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static $fusions = array();
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if ($reset) {
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$fusions = array();
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}
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if(!$fusions[$vid]) {
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$result = db_query("SELECT * FROM {views_fusion}");
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$fusions[$vid] = array();
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while ($fusion = db_fetch_object($result)) {
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if ($vid) {
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$fusions[$vid][$fusion->vid][] = $fusion;
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}
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else {
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$fusions[$vid][$fusion->mvid][] = $fusion;
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}
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}
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}
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return $fusions[$vid];
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}
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/*
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* returnes a table alias prefix to use
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*
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* @param $fused If the alias 'll be used for aliasing the fused view
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*/
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function _views_fusion_get_alias(&$fusion, $fused = true) {
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if ($fused) {
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return 'v' . $fusion->mvid;
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}
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else {
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return 'v' . $fusion->vid;
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}
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}
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/*
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* Implementation of hook_views_tables()
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*/
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function views_fusion_views_tables() {
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$fusion_tables = _views_fusion_get_tables();
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$tables = array();
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$fusions = _views_fusion_load(0);
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foreach($fusions as $array) {
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foreach($array as $fusion) {
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$tables[_views_fusion_get_alias($fusion) .'node'] = array(
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'name' => 'node',
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'provider' => 'internal', // won't show up in external list.
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'join' => array(
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'left' => array(
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'table' => $fusion->uses,
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'field' => $fusion_tables['fields'][$fusion->uses],
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'alias' => $fusions[$fusion->vid] ? _views_fusion_get_alias($fusion, false) : '',
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),
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'right' => array(
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'field' => 'nid'
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),
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)
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);
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}
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}
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return $tables;
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}
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/*
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* Implementation of hook_views_query_alter()
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*/
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function views_fusion_views_query_alter(&$query, &$view, &$summary, &$level) {
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$table_data = _views_get_tables();
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$fusions = _views_fusion_load();
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//care for a appropriate filter offset for all fused views
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static $filter_offset = -1;
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static $arg_offset = 0;
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$arg_offset += count($view->argument);
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if ($fusions[$view->vid]) {
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if ($filter_offset == -1) { //init
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$view->display = TRUE; //remember, that this view is the view, which is going to be built primary
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$filter_offset = is_array($view->exposed_filter) ? count($view->exposed_filter) : 0;
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}
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foreach ($fusions[$view->vid] as $fusion) {
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$fuse_view = views_load_view($fusion->mvid);
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$fuse_view->use_alias_prefix = _views_fusion_get_alias($fusion);
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//take care of the filter offsets
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$fuse_view->exposed_filter_offset = $filter_offset;
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if (is_array($fuse_view->exposed_filter)) {
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$filter_offset += count($fuse_view->exposed_filter);
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}
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//set page type to table view, so that the fields get built
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$fuse_view->page = 1;
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$fuse_view->page_type = 'table';
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// call this hook for the fused view and set the query object reference
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$info = _views_build_query($fuse_view, $view->args, views_get_filter_values());
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$fuse_query = &$fuse_view->the_query;
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//remember if a view wants to display a summary
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if ($info['summary'] && !$summary) {
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$summary = $info['summary'];
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$level = $arg_offset - count($fuse_view->argument) + $info['level'];
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}
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//clear the alias_prefix for the add_table calls, we have to care for each prefix ourself
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$saved_alias_prefix = $query->use_alias_prefix;
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$query->use_alias_prefix = '';
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//add the node relation table
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$joininfo = $table_data[$fusion->uses]['join'];
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$joininfo['left']['alias'] = $view->use_alias_prefix;
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//remember how often this table has been added
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$query->tables[$fusion->uses] += $fuse_query->tables[$fusion->uses];
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$num = $query->add_table($fusion->uses, false, 1, $joininfo);
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//join new node table for the fused view
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$joininfo = $table_data[$fuse_view->use_alias_prefix . 'node']['join'];
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if ($num > 1) {
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$joininfo['left']['table'] = $joininfo['left']['table'] . $num;
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}
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$joininfo['left']['alias'] = '';
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$query->add_table($fuse_view->use_alias_prefix . 'node', false, 1, $joininfo);
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//restore the alias_prefix
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$query->use_alias_prefix = $saved_alias_prefix;
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//merge query and fields
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views_fusion_query_merge($query, $fuse_query);
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views_fusion_views_merge($view, $fuse_view);
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if (is_array($view->table_header) && is_array($fuse_view->table_header)) {
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//reconstruct table headers with the merged field information
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$view->table_header = _views_construct_header($view, _views_get_fields());
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$query->set_header($view->table_header);
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}
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}
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if ($view->display) {
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$filter_offset = -1; //reset offsets for the next (new) view
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$arg_offset = 0;
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}
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}
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if ($filter_offset != -1) {
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//this view will be fused
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$query->set_header(array()); //clear header, so that no custom orderby clause is going to be generated for fused views
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$view->the_query = &$query; //save query object reference
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//prevent the application of a possible distinct to the query, this has to do the primary query
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$query->no_distinct = TRUE;
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}
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}
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/*
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* Merges two views query objects
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*
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* The second object will be merged into the first.
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* Table aliases have to be unique for both queries and the second query object mustn't contain
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* any group by clauses.
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*/
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function views_fusion_query_merge(&$query1, &$query2) {
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if ($query2->groupby && !$query1->groupby) {
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$query1->groupby = $query2->groupby;
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}
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else {
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//add an alias to the nid field
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$query2->fields[0] .= ' AS '. $query2->use_alias_prefix . 'node_nid';
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}
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//if query2 is set to be distinct, set query1 to distinct
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if ($query2->distinct) {
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$query1->set_distinct();
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}
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$query1->tablequeue = array_merge($query1->tablequeue, $query2->tablequeue);
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$query1->joins = array_merge($query1->joins, $query2->joins);
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$query1->fields = array_merge($query1->fields, $query2->fields);
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$query1->where = array_merge($query1->where, $query2->where);
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$query1->where_args = array_merge($query1->where_args, $query2->where_args);
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$query1->orderby = array_merge($query1->orderby, $query2->orderby);
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}
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/*
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* Merges the fields and exposed filters of the two views, so that view1 contains all
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*/
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function views_fusion_views_merge(&$view1, &$view2) {
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foreach ($view2->field as $field) {
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//each field must be prefixed once appropriate to its view
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if ($view2->use_alias_prefix && !$field['prefixed']) {
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//we don't prefix the fullname, as it is needed unprefixed for retrieving the fieldinfo
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$field['id'] = $view2->use_alias_prefix . $field['id'];
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$field['queryname'] = $view2->use_alias_prefix . $field['queryname'];
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$field['tablename'] = $view2->use_alias_prefix . $field['tablename'];
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$field['prefixed'] = TRUE;
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//save the prefix so that field handler can use it
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$field['alias_prefix'] = $view2->use_alias_prefix;
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}
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$view1->field[] = $field;
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}
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$view1->exposed_filter = array_merge($view1->exposed_filter, $view2->exposed_filter);
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$view1->argument = array_merge($view1->argument, $view2->argument);
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}
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/*
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| 437 |
* Implementation of hook_form_alter().
|
| 438 |
*/
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function views_fusion_form_alter($form_id, &$form) {
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if ($form_id == 'views_edit_view') {
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$vid = $form['vid']['#value'];
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if (!views_fusion_check_cacheable($vid)) {
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//prevent caching
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$form['basic-info']['no_cache'] = array('#type' => 'hidden', '#default_value' => 1);
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}
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}
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if ($form_id == 'views_delete_confirm') {
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$form['#submit']['views_fusion_delete_submit'] = array();
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}
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}
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/*
|
| 456 |
* The view gets deleted, so delete all according fusions
|
| 457 |
*/
|
| 458 |
function views_fusion_delete_submit($form_id, &$form_values) {
|
| 459 |
|
| 460 |
$vid = $form_values['vid'];
|
| 461 |
|
| 462 |
db_query("DELETE FROM {views_fusion} WHERE vid=%d OR mvid=%d", $vid, $vid);
|
| 463 |
views_invalidate_cache();
|
| 464 |
}
|
| 465 |
|
| 466 |
|
| 467 |
/*
|
| 468 |
* Determines if the the view is fused with views that are not cacheable
|
| 469 |
*/
|
| 470 |
function views_fusion_check_cacheable($vid) {
|
| 471 |
|
| 472 |
$fusions = _views_fusion_load();
|
| 473 |
|
| 474 |
if ($fusions[$vid]) {
|
| 475 |
foreach ($fusions[$vid] as $fusion) {
|
| 476 |
//is fused view cacheable?
|
| 477 |
$view = views_get_view($fusion->mvid);
|
| 478 |
if (!$view->is_cacheable) {
|
| 479 |
return false;
|
| 480 |
}
|
| 481 |
else if (!views_fusion_check_cacheable($fusion->mvid)) {
|
| 482 |
return false;
|
| 483 |
}
|
| 484 |
}
|
| 485 |
}
|
| 486 |
return true;
|
| 487 |
}
|
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