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IslandoraSolrResults.inc
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IslandoraSolrResults.inc
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<?php
/**
* @file
* Contains methods to search solr and display results. depends on Apache_Solr_Php client.
*/
/**
* Islandora Solr Results
*/
class IslandoraSolrResults {
static $facetSeparator = '~'; //used to separate facets in url
static $slashReplacement = '~slsh~'; // a pattern used to replace / in url's the slash breaks drupal clean url's
public static $SEARCH_CLASS_ADVANCED_SEARCH_NUMBER_FIELDS = 5;
public $facetFieldArray = array();
public $searchFieldArray = array();
public $resultFieldArray = array();
public $allSubsArray = array();
static function makeArray($in) {
return is_array($in)?
$in:
(isset($in)?
array($in):
array()
)
;
}
/**
* Constructor
*/
function IslandoraSolrResults() {
module_load_include('php', 'islandora_solr_search', 'SolrPhpClient/Apache/Solr/Service');
module_load_include('inc', 'islandora_solr_search', 'includes/common');
$this->prepFieldSubstitutions();
}
/**
* Output the main body of the search results
*
* @param type $solrQueryProcessor
* @param type $title
* @param type $output
* @return string
*/
function displayResults($solrQueryProcessor, $title = NULL, $output = '') {
if (is_null($title)) { //Needed to move this, as default parameters cannot be function calls
$title = t("Search Results");
}
$apacheSolrResult = $solrQueryProcessor->solrResult;
$total = (int) $apacheSolrResult->response->numFound;
$end = min(($solrQueryProcessor->solrLimit + $solrQueryProcessor->solrStart), $total);
// Initialize drupal-style pager
islandora_solr_search_pager_init($total, $solrQueryProcessor->solrLimit);
$output .= $this->addSecondaries();
$output .= '<h2>'.$title.'</h2>';
$output .= '<div id="islandora_solr_result_count">(' . ($solrQueryProcessor->solrStart + ($total > 0?1:0)) . ' - ' . $end . ' of ' . $total . ')</div>';
$output .= '<div class="content">';
// drupal_set_message(print_r($secondary_display_profiles,1));
// Render Drupal pager (top of search results)
$output .= theme('pager', NULL, $solrQueryProcessor->solrLimit, 0, NULL, 5);
/*
* Then, here, we need to build links to the current query under the secondary query display
* profile for each such profile which uses the hook.
*
* The link should basically be $theCurrentURL with &proile=<profile_name> tacked on.
*
* Also, perhaps there's no difference between primary and secondary profiles?
*/
$output .= $this->printResults($apacheSolrResult);
if (variable_get('islandora_solr_search_debug_mode', FALSE)) {
$output .= $this->printDebugOutput($solrResult);
}
// Render Drupal pager (bottom of search results)
$output .= theme('pager', NULL, $solrQueryProcessor->solrLimit, 0, NULL, 5);
$output .= "</div>"; // class = "content"
return $output;
}
function addSecondaries() {
$output = '';
// Get secondary display profiles
$secondary_display_profiles = module_invoke_all('islandora_solr_secondary_display');
// How about this for an expected return?
// return array(
// 'machine-name' = array(
// 'name' => 'Human Readable Name',
// 'module' => 'module_name',
// 'file' => 'FileName.inc',
// 'class' => 'ClassName',
// 'function' => 'function_name',
// 'description' => 'A description of the display profile',
// 'logo' => 'Some text, some <html>, an <img>, etc used to link to this output,
// );
// check if
// if the islandora_solr_search admin form has never been saved, then
// the variable 'islandora_solr_secondary_display' won't be set yet.
$secondary_array = variable_get('islandora_solr_secondary_display', array());
// count number of elements in array
$array_count = count($secondary_array);
// count number of disabled displays
$i = 0;
foreach ($secondary_array as $key => $value) {
if ($value === 0) {
$i++;
}
}
// if number of elements is the same as the number of disabled displays,
// this means that there are no displays enabled.
if ($array_count != $i) {
$output .= "<div id='islandora_solr_secondary_display_profiles'>";
foreach ($secondary_array as $name => $status) {
if ($status === $name) {
$description = $secondary_display_profiles[$name]['description'];
$logo = $secondary_display_profiles[$name]['logo'];
$attributes = array('title' => $description);
$query = array();
$query[] = drupal_query_string_encode(array('solr_profile' => $name));
$output .= l($logo, $_GET['q'], array('attributes' => $attributes, 'html' => TRUE, 'query' => count($query) ? implode('&', $query) : NULL));
}
}
$output .= "</div>";
}
return $output;
}
/**
* Function: printResults
*
* Description: translates a solr query result into a basic in-browser search result.
*
* @param Apache_Solr_Object $results
*/
function printResults($results) {
// Check for empty resultset
if( (int)$solrResult->response->numFound === 0 ) {
$output .= "<p>Sorry, but your search returned no results.</p>";
return $output;
}
$items = array();
$type = "ol";
$title = NULL;
$recordStart = $results->response->start;
$limitResults = variable_get('islandora_solr_search_limit_result_fields', 0);
$rawResponse = $results->getRawResponse();
$responseArray = json_decode($rawResponse, true);
$docs = $responseArray['response']['docs'];
//retrieve 'highlighing' from resultset.
$highlightResults = $responseArray['highlighting'];
$highlights = $results->highlighting;
foreach ($highlights as $highlight) {
$fields = get_object_vars($highlight);
$keys = array_keys($fields);
if (count($keys) > 0) {
foreach ($highlight->$keys[0] as $body) {
//drupal_set_message("$keys[0] $body");
}
}
//drupal_set_message($highlight->$keys[0]);
}
global $base_url;
if (empty($results)) {
return "no results";
}
foreach ($results->response->docs as $doc) {
$rows = array();
$row = 0;
$snippet = null;
foreach ($doc as $field => $value) {
if ($limitResults && empty($this->resultFieldArray[$field])) {
continue;
}
$translated_field_name = isset($this->allSubsArray[$field]) ? $this->allSubsArray[$field] : $field;
$rows[$row][] = array(
'data' => $translated_field_name,
'header' => TRUE,
);
if (is_array($value)) {
$value = implode(", ", $value);
}
if ($field == 'PID') {
$pid = $value;
$l = l($value, 'fedora/repository/' . htmlspecialchars($value, ENT_QUOTES, 'utf-8'));
$rows[$row][] = $l;
if (is_array($keys)) {
$snippet = $highlightResults[$value][$keys[0]];
}
}
else {
$rows[$row][] = $value;
}
$row++;
}
if ($snippet) {
$rows[$row][] = array(
'data' => 'Full Text',
'header' => TRUE,
);
$rows[$row][] = $snippet[0];
}
$items[] = theme_table(NULL, $rows, array('class' => 'islandora_solr_search_results_object'));
}
$output .= theme_item_list($items, $title, $type, array('class' => 'stuff', 'start' => ($recordStart + 1)));
return $output;
}
function printDebugOutput($results)
{
// debug dump
$results_r .= "<pre>Results: " . print_r($results, TRUE) . "</pre>";
$fieldset_r = array(
'#title' => t("Raw Results"),
'#collapsible' => TRUE,
'#collapsed' => TRUE,
'#value' => $results_r,
);
return theme('fieldset', $fieldset_r);
}
const FIELD_ALL = 0, FIELD_SEARCH = 1, FIELD_FACET = 2, FIELD_RESULT = 3;
function _make_pattern($string) {
return "/^". preg_quote($string, '/') ."/";
}
function getSubstitutedFields($string_in, $type = FIELD_SEARCH) {
$replacements = NULL;
switch($type) {
case FIELD_SEARCH:
$replacements = $this->searchFieldArray;
break;
case FIELD_FACET:
$replacements = $this->facetFieldArray;
break;
case FIELD_RESULT:
$replacements = $this->resultFieldArray;
break;
case FIELD_ALL:
default:
$replacements = $this->allSubsArray;
}
return preg_replace(array_map(array($this, '_make_pattern'), array_keys($replacements)), array_values($replacements), $string_in);
}
/**
* Function: currentQuery
*
* Description: Displays elements of the current solr query (with enabled filters).
* This functionality was previously rolled into the facet block, but it makes
* sense to separate the two functions, particularly as the current query is now
* imprinted in the system's breadcrumb.
*
* @param IslandoraSolrQueryProcessor $solrQueryProcessor
*/
function currentQuery($solrQueryProcessor) {
//dsm($solrQueryProcessor);
global $base_url;
$output = '';
$islandora_fq = restoreSlashes($solrQueryProcessor->solrFilters);
$islandora_facets = isset($solrQueryProcessor->solrResult->facet_counts->facet_fields) ?
$solrQueryProcessor->solrResult->facet_counts->facet_fields :
NULL;
//dsm($islandora_facets);
// look for the current display
global $current_display;
$display = isset($_GET['display']) ? $current_display : '';
$query = '';
if ($display) {
$query = array('display' => $display);
}
if (strlen(trim($solrQueryProcessor->solrQuery))) {
// Variables to build a drupal-ish unordered list
$query_list_title = t('Query');
$query_list_items = array();
$query_list_type = "ul";
$query_list_attributes = array('class' => 'islandora_solr_search_query_list query_list');
// OK, so it's a list of one.
// In the future, we could reasonably break the query on boolean operators
// and allow one part to be removed at a time.
$query = "*:*";
$fq = replaceSlashes($islandora_fq);
$defType = $solrQueryProcessor->solrDefType;
$repr = '-';
$link = "islandora/solr/search/$query/$fq/$defType";
$query_list_items[] .= l($repr, $link,
array(
'attributes' => array(
'class' => 'islandora_solr_add_remove_link'))
) . ' ' . $this->getSubstitutedFields(stripslashes($solrQueryProcessor->solrQuery), FIELD_SEARCH);
$output .= '<div class="islandora_solr_search_query_wrap">';
$output .= theme_item_list($query_list_items, $query_list_title, $query_list_type, $query_list_attributes);
$output .= '</div>'; // 'islandora_solr_search_query_wrap'
}
//////////////////////////////////////////////////////////////////////////////
// Here we will build links to remove currently enforced facet filters ... //
//////////////////////////////////////////////////////////////////////////////
$filters = empty($islandora_fq) ? NULL : explode(IslandoraSolrResults::$facetSeparator, $islandora_fq);
if (!empty($filters) && $islandora_fq != '-') {
// $filter_output = NULL;
// Variables to build a drupal-ish unordered list, which will be rendered
// a little bit farther down
$filter_list_title = t("Enabled Filters");
$filter_list_items = array();
$filter_list_type = "ul";
$filter_list_attributes = array('class' => 'islandora_solr_search_filter_list filter_list');
foreach ($filters as $key => $filter) {
$edit_filters = $filters;
unset($edit_filters[$key]);
$filter_disable = implode(IslandoraSolrResults::$facetSeparator, $edit_filters);
if (empty($filter_disable)) {
$filter_disable = '-';
}
$filter_name_and_value = explode(":", $filter, 2);
$filter_name = $filter_name_and_value[0];
$filter_value = $filter_name_and_value[1];
if (strncmp($filter_name, '-', 1))
$exclude = FALSE;
else {
$exclude = TRUE;
$filter_name = substr($filter_name, 1);
}
$query = replaceSlashes($solrQueryProcessor->solrQuery);
$fq = replaceSlashes($filter_disable);
$defType = $solrQueryProcessor->solrDefType;
$repr = '-';
$link = "islandora/solr/search/$query/$fq/$defType";
$filter_list_items[] = l($repr, $link,
array(
'attributes' => array(
'class' => 'islandora_solr_add_remove_link'))
) .' '. $this->facetFieldArray[$filter_name] . ($exclude ? ' != ' : ' = ') . $filter_value;
}
}
if (!empty($filter_list_items)) {
// $filter_output = str_replace('%2B','%252B',$filter_output);
$output .= '<div class="islandora_solr_search_filter_wrap">';
$output .= theme_item_list($filter_list_items, $filter_list_title, $filter_list_type, $filter_list_attributes);
$output .= '</div>'; // 'islandora_solr_search_filter_wrap'
}
return $output;
}
/**
* Function: prepFieldSubstitutions
*
* Description: reads configuration values and preps a number of key=>value
* arrays for output substitution
*/
function prepFieldSubstitutions() {
$rawFacetVals = variable_get("islandora_solr_search_block_facets", 'dc.subject ~ Subject,dc.type ~ Type');
$this->facetFieldArray = islandora_build_substitution_list($rawFacetVals);
$rawSearchTerms = variable_get('islandora_solr_searchterms', 'dc.title ~ Title');
$this->searchFieldArray = islandora_build_substitution_list($rawSearchTerms);
$rawResultFields = variable_get('islandora_solr_search_result_fields', 'dc.subject ~ Subject,dc.type ~ Type');
$this->resultFieldArray = islandora_build_substitution_list($rawResultFields);
$this->allSubsArray = array_merge($this->facetFieldArray, $this->searchFieldArray, $this->resultFieldArray);
}
function _addFacets(&$key, &$name, &$number, &$solrQueryProcessor, &$facet_count, &$list) {
$islandora_fq = $solrQueryProcessor->solrFilters;
//FIXME: This isn't quite right... It can make sense to facet on
// the same field multiple times, provided it is multi-valued...
$fq = IslandoraSolrResults::makeArray($solrQueryProcessor->solrParams['fq']);
//FIXME: This instance of 't' should be changed to format_string for Drupal 7 (not really translateable)
$filter = t('!key:"!name"', array(
'!key' => $key,
'!name' => replaceSlashes($name)
));
$disable_link = (array_search($filter, $fq) !== FALSE) || $number == $solrQueryProcessor->solrResult->response->numFound;
//$disable_link = strpos($islandora_fq, $key . ':"' . . '"') !== FALSE; //we don't want a link for this facet as we already used it
if ($islandora_fq && $islandora_fq != '-') {//there are existing facets in the query
if ($disable_link) {
//don't show link to this facet but include a link to remove it
}
else {
//FIXME: This instance of 't' should be changed to format_string for Drupal 7 (not really translateable)
$filter_include = t('!filter!sep!remaining', array(
'!filter' => $filter,
'!sep' => IslandoraSolrResults::$facetSeparator,
'!remaining' => $islandora_fq
));
$filter_exclude = "-$filter_include";
}
}
else { //no existing facets chosen
$filter_include = $filter;
$filter_exclude = "-$filter_include";
}
$filter_include = replaceSlashes($filter_include); //replace the slash so url does not break
$filter_exclude = replaceSlashes($filter_exclude); //replace the slash so url does not break
if ($disable_link) {
// we don't want to create a link, because we're already filtering on this value.
// Links to remove enabled facet filters are created down below.
}
else {//normal link
$dt = $solrQueryProcessor->solrDefType;
$q = $solrQueryProcessor->solrQuery;
$lplus = "islandora/solr/search/$q/$filter_include/$dt";
$lminus = "islandora/solr/search/$q/$filter_exclude/$dt";
$text = $name;
$attrs = array();
global $current_display;
$display = isset($_GET['display']) ? $current_display : '';
if ($display) {
$attrs['query'] = array('display' => $display);
}
$list[] = l($text, $lplus, $attrs) . ' (' . $number . ')' .
'<span class="plusminus">'.
l('+', $lplus, array_merge($attrs, array('attributes' => array('class' => 'plus'))))
.' '.
l('-', $lminus, array_merge($attrs, array('attributes' => array('class' => 'minus'))))
.'</span>';
$facet_count += 1;
}
}
/**
* Function: displayFacets
*
* Description: Displays basic facets based on an apache solr query response,
* as contained with the IslandoraSolrQueryProcessor.
*
* @global string $base_url
* @param IslandoraSolrQueryProcessor $solrQueryProcessor
* @return string
*/
function displayFacets($solrQueryProcessor) {
global $base_url;
$facet_output = $output = '';
$islandora_facets = isset($solrQueryProcessor->solrResult->facet_counts->facet_fields) ? $solrQueryProcessor->solrResult->facet_counts->facet_fields : array();
if (empty($islandora_facets)) {
return $output; //no facets to show
}
// set show more variable
$show_more = FALSE;
foreach ($islandora_facets as $key => $field) {
$list_items = array();
$list_type = "ul";
$list_title = NULL;
$test = get_object_vars($field); //get the number of fields if there aren't any don't show the key
if (count($test) > 0) {
$facet_count = 0;
unset($normal_facet_output);
foreach ($field as $name => $number) {
$this->_addFacets($key, $name, $number, $solrQueryProcessor, $facet_count, $list_items);
}
if (count($list_items) > 0) {
$facet_output .='<div class="islandora_solr_search_facet">';
// shown limit
$shown_limit = variable_get('islandora_solr_search_block_facet_shown_limit', 0);
$facetlimit = variable_get('islandora_solr_search_block_facet_limit', '12');
$facetMinCount = variable_get('islandora_solr_search_block_facet_min_count', '2');
$list_title = $this->facetFieldArray[$key];
$list_type = "ul";
$list_attributes = array(
'class' => implode(' ', array(
'islandora_solr_search_facet_list',
'facet_list'))
);
// split the array if shown_limit is between the min and max limits and if the total is larger than the shown_limit.
$split_facet = $facet_count > $shown_limit AND
$shown_limit < $facetlimit AND
$shown_limit > $facetMinCount;
if ($split_facet) {
$show_more = TRUE; //There exists a split array...
$list_items_hidden = array_slice($list_items, $shown_limit);
$list_items = array_slice($list_items, 0, $shown_limit);
}
$facet_output .= theme_item_list($list_items, $list_title, $list_type, $list_attributes);
// render the hidden facets
if ($split_facet) {
$facet_output .= '<a href="#" class="shown-toggle">' . t('Show more') . '</a>';
$facet_output .= '<a href="#" class="shown-toggle hidden">' . t('Show less') . '</a>';
$facet_output .= '<div class="toggle-wrapper hidden">';
$facet_output .= theme_item_list($list_items_hidden, NULL, $list_type, $list_attributes);
$facet_output .= '</div>';
}
$facet_output .='</div>'; //div.islandora_solr_search_facet
}
}
}
if ($show_more) {
// if there is at least one occurence of a split array, we add js to the page.
drupal_add_js(drupal_get_path('module', 'islandora_solr_search') . '/js/islandora_solr_search_shown_limit.js');
}
//////////////////////////////////////////////////////////////////////////////////////
// as we add additional facets, we're repeatedly URL-encoding old facet //
// strings. when we double-encode quotation marks they're incomprehensible to solr. //
// This is a quick workaround: //
//////////////////////////////////////////////////////////////////////////////////////
$facet_output = str_replace('%2B', '%252B', $facet_output);
if(!empty($facet_output)) {
$output .='<div class="islandora_solr_search_facet_wrap">';
$output .= $facet_output;
$output .= '</div>';
}
return $output;
}
function _add_field(&$form, &$i, &$unprocessed_contents, &$types) {
$type = NULL;
$temp = preg_split('/:/', $unprocessed_contents, 2);
if (!isset($type)) {
if (trim($temp[0]) === '_query_') {
//We're using a subquery--let's assume dismax
//get the 'qf'..., dump the rest into 'terms'
$temp[1] = trim($temp[1]);
$qf = strpos($temp[1], 'qf=');
$end = strpos($temp[1], '}');
$type = substr($temp[1], $qf + 3, $end - $qf - 3);
$terms = trim(substr($temp[1], $end + 1, -1));
}
else {
$type = $temp[0];
$terms = trim($temp[1], '()');
}
}
$form['search_type']["type$i"] = array(
'#title' => '',
'#type' => 'select',
'#options' => $types,
'#default_value' => trim($type)
);
$form["fedora_terms$i"] = array(
'#size' => '24',
'#type' => 'textfield',
'#title' => '',
'#default_value' => stripslashes($terms),
);
}
/**
* Build solr search form
* @param type $repeat
* @param type $pathToSearchTerms
* @param type $query
* @return string
*/
function build_solr_search_form($repeat = NULL, $pathToSearchTerms = NULL, $query = NULL) {
$types = array();
$terms = trim(variable_get('islandora_solr_searchterms', 'dc.title ~ Title,dc.subject ~ Subject'));
$termsArray = preg_split('/[\n]/', $terms);
foreach ($termsArray as $term) {
$vals = split('~', $term);
if (!$vals[1]) {
$vals[1] = $vals[0];
}
$types[trim($vals[0])] = trim($vals[1]);
}
$queryArray = NULL;
if (isset($query)) {
//A regex like '\\) (OR|AND) \\(' should work, right? Nope. Seems that
// preg_split (when given PREG_SPLIT_DELIM_CAPTURE) returns each explicit
// capture group, so for that regex, you'd get only the 'AND' or 'OR'.
// If you tried something like '('/(\\) (OR|AND) \\()/')', you'd get the
// 'proper' ') AND (' or ') OR (', but also the 'AND' or 'OR' from the
// inner group... RAGE!... This turns out to be unused... Anyway.
$bool_re = '/(OR|AND)/';
$queryArray = preg_split($bool_re, $query, 0, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
foreach ($queryArray as $key => $val) {
if (preg_match($bool_re, $val)) {
$andOrs[] = trim($val); // that is, just 'OR' or 'AND'
unset($queryArray[$key]); //remove that from the array
}
}
$queryArray = array_values($queryArray);
}
$andOrArray = array(
'AND' => 'and',
'OR' => 'or',
);
$form = array();
if (!isset($repeat)) {
$repeat = variable_get('islandora_solr_search_block_repeat', '3');
}
$i = 1;
$this->_add_field($form, $i, $queryArray[0], $types);
if ($repeat > 1 && $repeat < 9) { //don't want less then 2 or more then 9
for ($i = 2; $i < $repeat + 1; $i++) {
$t = $i - 1;
$j = $i - 2;
$andorj = ( isset($andOrs[$j]) ? $andOrs[$j] : 'AND' );
//$field_and_term = isset($queryArray[$t]) ? explode(':', $queryArray[$t]) : array('', '');
$form["andor$t"] = array(
'#title' => '',
'#type' => 'select',
'#default_value' => $andorj,
'#options' => $andOrArray
);
$this->_add_field($form, $i, $queryArray[$t], $types);
}
}
$form['submit'] = array(
'#type' => 'submit',
'#value' => t('search')
);
return $form;
}
/**
* Build simple solr form
* @global type $islandora_query
* @return type
*/
function build_simple_solr_form() {
// FIXME: This should actually be checking the settings in the request handler... Not making assumptions based on name
$required = FALSE;
if (variable_get('islandora_solr_search_block_request_handler', '') == 'standard') {
$required = TRUE;
}
global $islandora_query;
if (!strpos($islandora_query, ':')) {
$default = $islandora_query;
}
// TODO: Fix the above. The global is no longer valid, and the test is not conclusive. Should instead test for deftype=dismax.
$form["islandora_simple_search_query"] = array(
'#size' => '24%',
'#type' => 'textfield',
'#title' => '',
'#default_value' => $default,
'#required' => $required,
);
$form['submit'] = array(
'#type' => 'submit',
'#value' => t('search')
);
return $form;
}
/**
* Theme solr search form
* @param type $form
* @return type
*/
function theme_solr_search_form($form) {
if (!isset($repeat)) {
$repeat = variable_get('islandora_solr_search_block_repeat', '3');
}
$output = drupal_render($form['search_type']['type1']);
$output .= drupal_render($form['fedora_terms1']);
$output .= drupal_render($form['andor1']) . drupal_render($form['search_type']['type2']);
$output .= drupal_render($form['fedora_terms2']);
if ($repeat > 2 && $repeat < 9) {
for ($i = 3; $i < $repeat + 1; $i++) {
$t = $i - 1;
$output .= drupal_render($form["andor$t"]) . drupal_render($form['search_type']["type$i"]);
$output .= drupal_render($form["fedora_terms$i"]);
}
}
$output .= drupal_render($form['submit']);
$output .= drupal_render($form);
return $output;
}
}