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This commit is contained in:
Ty Clifford
@@ -0,0 +1,981 @@
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<?php
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class pluginSearch extends Plugin
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{
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private $pagesFound = array();
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private $numberOfItems = 0;
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private $searchTerm = '';
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public function init()
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{
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// Fields and default values for the database of this plugin
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$this->dbFields = array(
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'label' => 'Search',
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'minChars' => 3,
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'wordsToCachePerPage' => 800,
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'showButtonSearch' => false,
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'highlightResults' => true,
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'showResultCount' => true,
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'searchInTags' => true,
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'searchInCategories' => true,
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'excerptLength' => 200
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);
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}
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public function form()
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{
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global $L;
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$html = '<div class="alert alert-primary" role="alert">';
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$html .= $this->description();
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$html .= '</div>';
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$html .= '<div>';
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$html .= '<label>' . $L->get('Label') . '</label>';
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$html .= '<input name="label" type="text" dir="auto" value="' . htmlspecialchars($this->getValue('label'), ENT_QUOTES, 'UTF-8') . '">';
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$html .= '<span class="tip">' . $L->get('This title is almost always used in the sidebar of the site') . '</span>';
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$html .= '</div>';
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$html .= '<div>';
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$html .= '<label>' . $L->get('Minimum number of characters when searching') . '</label>';
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$html .= '<input name="minChars" type="number" dir="auto" value="' . (int) $this->getValue('minChars') . '" min="1" max="50">';
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$html .= '</div>';
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$html .= '<div>';
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$html .= '<label>' . $L->get('Words to cache per page') . '</label>';
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$html .= '<input name="wordsToCachePerPage" type="number" value="' . (int) $this->getValue('wordsToCachePerPage') . '" min="50" max="5000">';
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$html .= '</div>';
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$html .= '<div>';
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$html .= '<label>' . $L->get('Show button search') . '</label>';
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$html .= '<select name="showButtonSearch">';
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$html .= '<option value="true" ' . ($this->getValue('showButtonSearch') === true ? 'selected' : '') . '>' . $L->get('enabled') . '</option>';
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$html .= '<option value="false" ' . ($this->getValue('showButtonSearch') === false ? 'selected' : '') . '>' . $L->get('disabled') . '</option>';
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$html .= '</select>';
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$html .= '</div>';
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$html .= '<div>';
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$html .= '<label>' . $L->get('Highlight search terms in results') . '</label>';
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$html .= '<select name="highlightResults">';
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$html .= '<option value="true" ' . ($this->getValue('highlightResults') === true ? 'selected' : '') . '>' . $L->get('enabled') . '</option>';
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$html .= '<option value="false" ' . ($this->getValue('highlightResults') === false ? 'selected' : '') . '>' . $L->get('disabled') . '</option>';
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$html .= '</select>';
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$html .= '</div>';
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$html .= '<div>';
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$html .= '<label>'. $L->get('Show result count') . '</label>';
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$html .= '<select name="showResultCount">';
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$html .= '<option value="true" ' . ($this->getValue('showResultCount') === true ? 'selected' : '') . '>' . $L->get('enabled') . '</option>';
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$html .= '<option value="false" ' . ($this->getValue('showResultCount') === false ? 'selected' : '') . '>' . $L->get('disabled') . '</option>';
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$html .= '</select>';
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$html .= '</div>';
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$html .= '<div>';
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$html .= '<label>' . $L->get('Search in tags') . '</label>';
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$html .= '<select name="searchInTags">';
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$html .= '<option value="true" ' . ($this->getValue('searchInTags') === true ? 'selected' : '') . '>' . $L->get('enabled') . '</option>';
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$html .= '<option value="false" ' . ($this->getValue('searchInTags') === false ? 'selected' : '') . '>' . $L->get('disabled') . '</option>';
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$html .= '</select>';
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$html .= '</div>';
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$html .= '<div>';
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$html .= '<label>' . $L->get('Search in categories') . '</label>';
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$html .= '<select name="searchInCategories">';
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$html .= '<option value="true" ' . ($this->getValue('searchInCategories') === true ? 'selected' : '') . '>' . $L->get('enabled') . '</option>';
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$html .= '<option value="false" ' . ($this->getValue('searchInCategories') === false ? 'selected' : '') . '>' . $L->get('disabled') . '</option>';
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$html .= '</select>';
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$html .= '</div>';
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$html .= '<div>';
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$html .= '<label>' . $L->get('Excerpt length (characters)') . '</label>';
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$html .= '<input name="excerptLength" type="number" value="' . $this->getValue('excerptLength') . '" min="50" max="500">';
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$html .= '</div>';
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return $html;
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}
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// HTML for sidebar
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public function siteSidebar()
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{
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global $L;
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$label = $this->getValue('label');
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$labelEscaped = htmlspecialchars($label, ENT_QUOTES, 'UTF-8');
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$searchText = $L->get('Search');
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$searchTextEscaped = htmlspecialchars($searchText, ENT_QUOTES, 'UTF-8');
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$html = '<div class="plugin plugin-search">';
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$html .= '<h2 class="plugin-label">' . $labelEscaped . '</h2>';
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$html .= '<div class="plugin-content">';
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$html .= '<form class="search-plugin-form" role="search" onsubmit="return pluginSearchSubmit()">';
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$html .= '<label for="jspluginSearchText" class="sr-only visually-hidden">' . $searchTextEscaped . '</label>';
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$html .= '<input type="search" id="jspluginSearchText" name="search" placeholder="' . $searchTextEscaped . '..." autocomplete="off" dir="auto" aria-label="' . $searchTextEscaped . '">';
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if ($this->getValue('showButtonSearch')) {
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$html .= '<button type="submit">' . $searchTextEscaped . '</button>';
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}
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$html .= '</form>';
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$html .= '</div>';
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$html .= '</div>';
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$domainBase = json_encode(DOMAIN_BASE);
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$minChars = max(1, (int) $this->getValue('minChars'));
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$minCharsMessage = json_encode('Please enter at least ' . $minChars . ' characters to search.');
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$html .= <<<EOF
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<script>
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function pluginSearchSubmit() {
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var text = document.getElementById("jspluginSearchText").value.trim();
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if (text.length < {$minChars}) {
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alert({$minCharsMessage});
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return false;
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}
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window.location.href = {$domainBase} + 'search/' + encodeURIComponent(text);
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return false;
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}
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</script>
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EOF;
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return $html;
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}
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// Inject CSS styles for search results (works with any theme)
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public function siteHead()
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{
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$css = <<<'CSS'
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<style>
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/* Search Plugin Styles - Theme agnostic */
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.search-results-header {
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padding: 2rem 0;
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margin-bottom: 1.5rem;
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border-bottom: 1px solid rgba(0,0,0,0.1);
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}
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.search-results-header h1 {
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font-size: 1.75rem;
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margin: 0 0 0.5rem 0;
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}
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.search-results-header .search-query {
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color: #0071e3;
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font-weight: 600;
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}
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.search-results-header .search-count {
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color: #6e6e73;
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font-size: 0.9375rem;
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margin: 0;
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}
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.search-no-results {
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text-align: center;
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padding: 3rem 1rem;
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}
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.search-no-results h2 {
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font-size: 1.5rem;
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margin-bottom: 0.75rem;
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}
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.search-no-results p {
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color: #6e6e73;
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margin-bottom: 1.5rem;
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}
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.search-no-results .search-suggestions {
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text-align: left;
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max-width: 400px;
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margin: 0 auto;
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}
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.search-no-results .search-suggestions h3 {
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font-size: 1rem;
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margin-bottom: 0.5rem;
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}
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.search-no-results .search-suggestions ul {
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padding-left: 1.25rem;
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color: #6e6e73;
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}
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.search-no-results .search-suggestions li {
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margin-bottom: 0.25rem;
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}
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.search-highlight {
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background-color: rgba(255, 230, 0, 0.4);
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padding: 0.1em 0.2em;
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border-radius: 2px;
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font-weight: 500;
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}
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.search-result-excerpt {
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color: #1d1d1f;
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line-height: 1.6;
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}
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.search-inline-form {
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max-width: 400px;
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margin: 1.5rem auto 0;
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}
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.search-inline-form input[type="search"] {
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width: 100%;
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padding: 0.75rem 1rem;
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font-size: 1rem;
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border: 1px solid rgba(0,0,0,0.1);
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border-radius: 8px;
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}
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.search-inline-form input[type="search"]:focus {
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outline: none;
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border-color: #0071e3;
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box-shadow: 0 0 0 4px rgba(0,113,227,0.1);
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}
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/* Sidebar search form styling */
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.plugin-search .search-plugin-form {
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display: flex;
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flex-wrap: wrap;
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gap: 0.5rem;
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}
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.plugin-search .search-plugin-form input[type="search"] {
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flex: 1;
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padding: 0.5rem 0.75rem;
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border: 1px solid rgba(0,0,0,0.15);
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border-radius: 6px;
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font-size: 0.9375rem;
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max-width: 100%;
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}
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.plugin-search .search-plugin-form input[type="search"]:focus {
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outline: none;
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border-color: #0071e3;
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}
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.plugin-search .search-plugin-form button {
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padding: 0.5rem 1rem;
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margin: 0 auto;
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background: #0071e3;
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color: white;
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border: none;
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border-radius: 6px;
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cursor: pointer;
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font-size: 0.875rem;
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width: 100%;
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}
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.plugin-search .search-plugin-form button:hover {
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background: #0077ed;
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}
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/* Dark mode support */
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@media (prefers-color-scheme: dark) {
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.search-results-header {
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border-bottom-color: rgba(255,255,255,0.1);
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}
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.search-results-header .search-count,
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.search-no-results p,
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.search-no-results .search-suggestions ul {
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color: #a1a1a6;
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}
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.search-result-excerpt {
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color: #f5f5f7;
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}
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.search-highlight {
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background-color: rgba(255, 214, 10, 0.3);
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}
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.search-inline-form input[type="search"],
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.plugin-search .search-plugin-form input[type="search"] {
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background: #1d1d1f;
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border-color: rgba(255,255,255,0.1);
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color: #f5f5f7;
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}
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}
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/* Accessibility - screen reader only class */
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.sr-only, .visually-hidden {
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position: absolute;
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width: 1px;
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height: 1px;
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padding: 0;
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margin: -1px;
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overflow: hidden;
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clip: rect(0, 0, 0, 0);
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white-space: nowrap;
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border: 0;
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}
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</style>
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CSS;
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// Add JavaScript for automatic highlighting on search results page
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$webhook = 'search';
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if ($this->webhook($webhook, false, false) && $this->getValue('highlightResults')) {
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$searchTerm = $this->getSearchTerm();
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$searchTermJS = json_encode($searchTerm);
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$js = '<script>' . PHP_EOL;
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$js .= 'document.addEventListener("DOMContentLoaded", function() {' . PHP_EOL;
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$js .= ' var searchTerm = ' . $searchTermJS . ';' . PHP_EOL;
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$js .= ' if (!searchTerm || searchTerm.length < 2) return;' . PHP_EOL;
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$js .= ' var seen = {};' . PHP_EOL;
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$js .= ' var words = searchTerm.toLowerCase().split(/\\s+/).filter(function(w) {' . PHP_EOL;
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$js .= ' if (w.length < 2 || seen[w]) return false;' . PHP_EOL;
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$js .= ' seen[w] = true;' . PHP_EOL;
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$js .= ' return true;' . PHP_EOL;
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$js .= ' });' . PHP_EOL;
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$js .= ' if (words.length === 0) return;' . PHP_EOL;
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$js .= ' words.sort(function(a, b) { return b.length - a.length; });' . PHP_EOL;
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$js .= ' var escapedWords = words.map(function(w) {' . PHP_EOL;
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$js .= ' return w.split("").map(function(ch) {' . PHP_EOL;
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$js .= ' return ".+*?^${}()|[]\\\\".indexOf(ch) === -1 ? ch : "\\\\" + ch;' . PHP_EOL;
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$js .= ' }).join("");' . PHP_EOL;
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$js .= ' });' . PHP_EOL;
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$js .= ' var pattern = new RegExp("(" + escapedWords.join("|") + ")", "gi");' . PHP_EOL;
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$js .= ' var articles = document.querySelectorAll("article, main, [role=main], .content");' . PHP_EOL;
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$js .= ' articles.forEach(function(article) {' . PHP_EOL;
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$js .= ' if (article.closest(".search-results-header") || article.closest("form")) return;' . PHP_EOL;
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$js .= ' var walker = document.createTreeWalker(article, NodeFilter.SHOW_TEXT, null, false);' . PHP_EOL;
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$js .= ' var textNodes = [];' . PHP_EOL;
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$js .= ' while(walker.nextNode()) {' . PHP_EOL;
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$js .= ' var parent = walker.currentNode.parentNode;' . PHP_EOL;
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$js .= ' if (parent && (parent.tagName === "SCRIPT" || parent.tagName === "STYLE" || parent.tagName === "MARK")) continue;' . PHP_EOL;
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$js .= ' textNodes.push(walker.currentNode);' . PHP_EOL;
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$js .= ' }' . PHP_EOL;
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$js .= ' textNodes.forEach(function(textNode) {' . PHP_EOL;
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$js .= ' var text = textNode.nodeValue;' . PHP_EOL;
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$js .= ' pattern.lastIndex = 0;' . PHP_EOL;
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$js .= ' if (!pattern.test(text)) return;' . PHP_EOL;
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$js .= ' pattern.lastIndex = 0;' . PHP_EOL;
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$js .= ' var fragment = document.createDocumentFragment();' . PHP_EOL;
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$js .= ' var lastIndex = 0;' . PHP_EOL;
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$js .= ' var match;' . PHP_EOL;
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$js .= ' while ((match = pattern.exec(text)) !== null) {' . PHP_EOL;
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$js .= ' if (match.index > lastIndex) fragment.appendChild(document.createTextNode(text.slice(lastIndex, match.index)));' . PHP_EOL;
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$js .= ' var mark = document.createElement("mark");' . PHP_EOL;
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$js .= ' mark.className = "search-highlight";' . PHP_EOL;
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$js .= ' mark.textContent = match[0];' . PHP_EOL;
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$js .= ' fragment.appendChild(mark);' . PHP_EOL;
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$js .= ' lastIndex = pattern.lastIndex;' . PHP_EOL;
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$js .= ' }' . PHP_EOL;
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$js .= ' if (lastIndex < text.length) fragment.appendChild(document.createTextNode(text.slice(lastIndex)));' . PHP_EOL;
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$js .= ' textNode.parentNode.replaceChild(fragment, textNode);' . PHP_EOL;
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$js .= ' });' . PHP_EOL;
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$js .= ' });' . PHP_EOL;
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$js .= '});' . PHP_EOL;
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$js .= '</script>' . PHP_EOL;
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$css .= $js;
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}
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return $css;
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}
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// Display search header before content
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public function siteBodyBegin()
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{
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$webhook = 'search';
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if (!$this->webhook($webhook, false, false)) {
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return false;
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}
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global $L;
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$searchTerm = $this->getSearchTerm();
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$searchTermEscaped = htmlspecialchars($searchTerm, ENT_QUOTES, 'UTF-8');
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$count = $this->numberOfItems;
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if (empty($searchTerm)) {
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return '';
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}
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$html = '<div class="container">';
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$html .= '<div class="search-results-header">';
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$html .= '<h1>' . htmlspecialchars($L->get('Search results for'), ENT_QUOTES, 'UTF-8') . ' "<span class="search-query">' . $searchTermEscaped . '</span>"</h1>';
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if ($this->getValue('showResultCount')) {
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if ($count === 0) {
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$html .= '<p class="search-count">' . $L->get('No pages found') . '</p>';
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} elseif ($count === 1) {
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$html .= '<p class="search-count">1 ' . strtolower($L->get('result found')) . '</p>';
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} else {
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$html .= '<p class="search-count">' . $count . ' ' . strtolower($L->get('results found')) . '</p>';
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}
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}
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$html .= '</div>';
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$html .= '</div>';
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// If no results, show helpful message
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if ($count === 0) {
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$domainBase = json_encode(DOMAIN_BASE);
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$minChars = max(1, (int) $this->getValue('minChars'));
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$searchLabel = htmlspecialchars($L->get('Search'), ENT_QUOTES, 'UTF-8');
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$html .= '<div class="container">';
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$html .= '<div class="search-no-results">';
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$html .= '<h2>' . $L->get('No results found') . '</h2>';
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$html .= '<p>' . sprintf($L->get('no-pages-found-for-the-search'), $searchTermEscaped) . '</p>';
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$html .= '<div class="search-suggestions">';
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$html .= '<h3>' . $L->get('Suggestions') . ':</h3>';
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$html .= '<ul>';
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$html .= '<li>' . $L->get('Check your spelling') . '</li>';
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$html .= '<li>' . $L->get('Try different keywords') . '</li>';
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$html .= '<li>' . $L->get('Try more general keywords') . '</li>';
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$html .= '</ul>';
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$html .= '</div>';
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$html .= '<div class="search-inline-form">';
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$html .= '<form role="search" onsubmit="return searchAgain()">';
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$html .= '<input type="search" id="searchAgainInput" value="' . $searchTermEscaped . '" placeholder="' . $searchLabel . '..." aria-label="' . $searchLabel . '">';
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$html .= '</form>';
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||||
$html .= '</div>';
|
||||
$html .= '</div>';
|
||||
$html .= '</div>';
|
||||
$html .= <<<EOF
|
||||
<script>
|
||||
function searchAgain() {
|
||||
var text = document.getElementById("searchAgainInput").value.trim();
|
||||
if (text.length < {$minChars}) return false;
|
||||
window.location.href = {$domainBase} + 'search/' + encodeURIComponent(text);
|
||||
return false;
|
||||
}
|
||||
</script>
|
||||
EOF;
|
||||
}
|
||||
|
||||
return $html;
|
||||
}
|
||||
|
||||
public function install($position = 0)
|
||||
{
|
||||
parent::install($position);
|
||||
return $this->createCache();
|
||||
}
|
||||
|
||||
// Method called when the user click on button save in the settings of the plugin
|
||||
public function post()
|
||||
{
|
||||
parent::post();
|
||||
return $this->createCache();
|
||||
}
|
||||
|
||||
public function afterPageCreate()
|
||||
{
|
||||
$this->createCache();
|
||||
}
|
||||
|
||||
public function afterPageModify()
|
||||
{
|
||||
$this->createCache();
|
||||
}
|
||||
|
||||
public function afterPageDelete()
|
||||
{
|
||||
$this->createCache();
|
||||
}
|
||||
|
||||
// Get the current search term
|
||||
public function getSearchTerm()
|
||||
{
|
||||
return $this->searchTerm;
|
||||
}
|
||||
|
||||
// Get the number of results
|
||||
public function getResultCount()
|
||||
{
|
||||
return $this->numberOfItems;
|
||||
}
|
||||
|
||||
public function beforeAll()
|
||||
{
|
||||
// Check if the URL match with the webhook
|
||||
$webhook = 'search';
|
||||
if ($this->webhook($webhook, false, false)) {
|
||||
global $site;
|
||||
global $url;
|
||||
|
||||
// Change the whereAmI to avoid load pages in the rule 69.pages
|
||||
// This is only for performance purpose
|
||||
$url->setWhereAmI('search');
|
||||
|
||||
// Get the string to search from the URL
|
||||
$stringToSearch = $this->webhook($webhook, true, false);
|
||||
$stringToSearch = trim($stringToSearch, '/');
|
||||
$stringToSearch = urldecode($stringToSearch);
|
||||
$stringToSearch = preg_replace('/\s+/u', ' ', $stringToSearch);
|
||||
$stringToSearch = trim($stringToSearch);
|
||||
if (mb_strlen($stringToSearch, 'UTF-8') > 120) {
|
||||
$stringToSearch = mb_substr($stringToSearch, 0, 120, 'UTF-8');
|
||||
}
|
||||
$this->searchTerm = $stringToSearch;
|
||||
|
||||
// Search the string in the cache and get all pages with matches
|
||||
$list = $this->search($stringToSearch);
|
||||
$this->numberOfItems = count($list);
|
||||
|
||||
// Split the content in pages
|
||||
// The first page number is 1, so the real is 0
|
||||
$realPageNumber = $url->pageNumber() - 1;
|
||||
$itemsPerPage = $site->itemsPerPage();
|
||||
if ($itemsPerPage <= 0) {
|
||||
if ($realPageNumber === 0) {
|
||||
$this->pagesFound = $list;
|
||||
}
|
||||
} else {
|
||||
$chunks = array_chunk($list, $itemsPerPage);
|
||||
if (isset($chunks[$realPageNumber])) {
|
||||
$this->pagesFound = $chunks[$realPageNumber];
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
public function paginator()
|
||||
{
|
||||
$webhook = 'search';
|
||||
if ($this->webhook($webhook, false, false)) {
|
||||
// Get the pre-defined variable from the rule 99.paginator.php
|
||||
// Is necessary to change this variable to fit the paginator with the result from the search
|
||||
global $numberOfItems;
|
||||
$numberOfItems = $this->numberOfItems;
|
||||
}
|
||||
}
|
||||
|
||||
public function beforeSiteLoad()
|
||||
{
|
||||
$webhook = 'search';
|
||||
if ($this->webhook($webhook, false, false)) {
|
||||
global $url;
|
||||
global $WHERE_AM_I;
|
||||
$WHERE_AM_I = 'search';
|
||||
|
||||
// Get the pre-defined variable from the rule 69.pages.php
|
||||
// We change the content to show in the website
|
||||
global $content;
|
||||
$content = array();
|
||||
foreach ($this->pagesFound as $pageKey) {
|
||||
try {
|
||||
$page = new Page($pageKey);
|
||||
$excerpt = $this->getSearchExcerpt($page->content(), $this->searchTerm);
|
||||
if (!empty($excerpt)) {
|
||||
$page->setField('content', '<p class="search-result-excerpt">' . $this->highlightTerms($excerpt, $this->searchTerm) . '</p>');
|
||||
}
|
||||
array_push($content, $page);
|
||||
} catch (Exception $e) {
|
||||
// continue
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Highlight search terms in plain text and return safe HTML.
|
||||
*/
|
||||
public function highlightTerms($text, $searchTerm)
|
||||
{
|
||||
$safeText = htmlspecialchars((string) $text, ENT_QUOTES, 'UTF-8');
|
||||
|
||||
if (!$this->getValue('highlightResults') || empty($searchTerm)) {
|
||||
return $safeText;
|
||||
}
|
||||
|
||||
$words = preg_split('/\s+/u', trim($searchTerm), -1, PREG_SPLIT_NO_EMPTY);
|
||||
$words = array_filter($words, function($word) {
|
||||
return mb_strlen($word, 'UTF-8') >= 2;
|
||||
});
|
||||
$words = array_values(array_unique($words));
|
||||
|
||||
if (empty($words)) {
|
||||
return $safeText;
|
||||
}
|
||||
|
||||
usort($words, function($a, $b) {
|
||||
return mb_strlen($b, 'UTF-8') - mb_strlen($a, 'UTF-8');
|
||||
});
|
||||
|
||||
$escapedWords = array_map(function($word) {
|
||||
return preg_quote(htmlspecialchars($word, ENT_QUOTES, 'UTF-8'), '/');
|
||||
}, $words);
|
||||
|
||||
$pattern = '/(' . implode('|', $escapedWords) . ')/iu';
|
||||
|
||||
$highlighted = preg_replace($pattern, '<mark class="search-highlight">$1</mark>', $safeText);
|
||||
if ($highlighted === null) {
|
||||
return $safeText;
|
||||
}
|
||||
|
||||
return $highlighted;
|
||||
}
|
||||
|
||||
/**
|
||||
* Get excerpt around the search term
|
||||
*/
|
||||
public function getSearchExcerpt($content, $searchTerm, $length = null)
|
||||
{
|
||||
if ($length === null) {
|
||||
$length = $this->getValue('excerptLength');
|
||||
}
|
||||
$length = min(800, max(80, (int) $length));
|
||||
|
||||
$content = $this->plainText($content);
|
||||
if (empty($content)) {
|
||||
return '';
|
||||
}
|
||||
|
||||
$words = preg_split('/\s+/u', trim($searchTerm), -1, PREG_SPLIT_NO_EMPTY);
|
||||
$words = array_filter($words, function($word) {
|
||||
return mb_strlen($word, 'UTF-8') >= 2;
|
||||
});
|
||||
|
||||
$firstPos = false;
|
||||
foreach ($words as $word) {
|
||||
$pos = mb_stripos($content, $word, 0, 'UTF-8');
|
||||
if ($pos !== false && ($firstPos === false || $pos < $firstPos)) {
|
||||
$firstPos = $pos;
|
||||
}
|
||||
}
|
||||
|
||||
$start = ($firstPos === false) ? 0 : max(0, $firstPos - (int) ($length / 3));
|
||||
|
||||
if ($start > 0) {
|
||||
$prefix = mb_substr($content, 0, $start, 'UTF-8');
|
||||
$spacePos = mb_strrpos($prefix, ' ', 0, 'UTF-8');
|
||||
if ($spacePos !== false) {
|
||||
$start = $spacePos + 1;
|
||||
}
|
||||
}
|
||||
|
||||
$excerpt = mb_substr($content, $start, $length, 'UTF-8');
|
||||
$contentLength = mb_strlen($content, 'UTF-8');
|
||||
|
||||
if ($start > 0) {
|
||||
$excerpt = '...' . $excerpt;
|
||||
}
|
||||
if ($start + $length < $contentLength) {
|
||||
$lastSpace = mb_strrpos($excerpt, ' ', 0, 'UTF-8');
|
||||
if ($lastSpace !== false && $lastSpace > max(20, $length - 40)) {
|
||||
$excerpt = mb_substr($excerpt, 0, $lastSpace, 'UTF-8');
|
||||
}
|
||||
$excerpt .= '...';
|
||||
}
|
||||
|
||||
return $excerpt;
|
||||
}
|
||||
|
||||
private function plainText($text)
|
||||
{
|
||||
$text = Text::removeHTMLTags((string) $text);
|
||||
$text = html_entity_decode($text, ENT_QUOTES, 'UTF-8');
|
||||
$plainText = preg_replace('/\s+/u', ' ', $text);
|
||||
if ($plainText === null) {
|
||||
$plainText = preg_replace('/\s+/', ' ', $text);
|
||||
}
|
||||
if ($plainText === null) {
|
||||
$plainText = $text;
|
||||
}
|
||||
|
||||
return trim((string) $plainText);
|
||||
}
|
||||
|
||||
// Generate the cache file
|
||||
// This function is necessary to call it when you create, edit or remove content
|
||||
private function createCache()
|
||||
{
|
||||
// Get all pages published
|
||||
global $pages;
|
||||
global $categories;
|
||||
|
||||
$list = $pages->getList($pageNumber = 1, $numberOfItems = -1, $published = true, $static = true, $sticky = true, $draft = false, $scheduled = false);
|
||||
|
||||
$cache = array();
|
||||
foreach ($list as $pageKey) {
|
||||
$page = buildPage($pageKey);
|
||||
if ($page === false) {
|
||||
continue;
|
||||
}
|
||||
|
||||
// Process content
|
||||
$characterLimit = max(250, (int) $this->getValue('wordsToCachePerPage') * 6);
|
||||
$content = Text::truncate($this->plainText($page->content()), $characterLimit, '');
|
||||
|
||||
// Include the page to the cache
|
||||
$cache[$pageKey] = array(
|
||||
'title' => $this->plainText($page->title()),
|
||||
'description' => $this->plainText($page->description()),
|
||||
'content' => $content,
|
||||
'tags' => '',
|
||||
'category' => ''
|
||||
);
|
||||
|
||||
// Add tags if enabled
|
||||
if ($this->getValue('searchInTags')) {
|
||||
$pageTags = $page->tags(true);
|
||||
if (!empty($pageTags)) {
|
||||
$cache[$pageKey]['tags'] = implode(' ', $pageTags);
|
||||
}
|
||||
}
|
||||
|
||||
// Add category if enabled
|
||||
if ($this->getValue('searchInCategories')) {
|
||||
$categoryKey = $page->categoryKey();
|
||||
if (!empty($categoryKey) && isset($categories)) {
|
||||
try {
|
||||
$category = new Category($categoryKey);
|
||||
$cache[$pageKey]['category'] = $this->plainText($category->name());
|
||||
} catch (Exception $e) {
|
||||
// Category not found
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
$cache[$pageKey]['search'] = $this->buildSearchFields($cache[$pageKey]);
|
||||
}
|
||||
|
||||
// Generate JSON file with the cache
|
||||
$json = json_encode($cache, JSON_UNESCAPED_UNICODE);
|
||||
return file_put_contents($this->cacheFile(), $json, LOCK_EX);
|
||||
}
|
||||
|
||||
// Returns the absolute path of the cache file
|
||||
private function cacheFile()
|
||||
{
|
||||
return $this->workspace() . 'cache.json';
|
||||
}
|
||||
|
||||
// Search text inside the cache
|
||||
// Returns an array with the pages keys related to the text
|
||||
// The array is sorted by score
|
||||
private function search($text)
|
||||
{
|
||||
$text = trim($text);
|
||||
|
||||
// Check minimum characters
|
||||
$minChars = max(1, (int) $this->getValue('minChars'));
|
||||
if (mb_strlen($text, 'UTF-8') < $minChars) {
|
||||
return array();
|
||||
}
|
||||
|
||||
// Read the cache file
|
||||
$cacheFile = $this->cacheFile();
|
||||
if (!file_exists($cacheFile)) {
|
||||
$this->createCache();
|
||||
}
|
||||
|
||||
$json = file_get_contents($cacheFile);
|
||||
$cache = json_decode($json, true);
|
||||
|
||||
if (!is_array($cache)) {
|
||||
$this->createCache();
|
||||
$json = file_get_contents($cacheFile);
|
||||
$cache = json_decode($json, true);
|
||||
}
|
||||
|
||||
if (empty($cache) || !is_array($cache)) {
|
||||
return array();
|
||||
}
|
||||
|
||||
$terms = $this->tokenizeSearchTerm($text);
|
||||
if (empty($terms)) {
|
||||
return array();
|
||||
}
|
||||
|
||||
$scores = array();
|
||||
foreach ($cache as $pageKey => $data) {
|
||||
if (!is_array($data)) {
|
||||
continue;
|
||||
}
|
||||
|
||||
$score = $this->scoreSearchResult($data, $text, $terms);
|
||||
if ($score > 0) {
|
||||
$scores[$pageKey] = $score;
|
||||
}
|
||||
}
|
||||
|
||||
arsort($scores, SORT_NUMERIC);
|
||||
return array_keys($scores);
|
||||
}
|
||||
|
||||
private function buildSearchFields($data)
|
||||
{
|
||||
$fields = array(
|
||||
'title' => $this->normalizeSearchText(isset($data['title']) ? $data['title'] : ''),
|
||||
'description' => $this->normalizeSearchText(isset($data['description']) ? $data['description'] : ''),
|
||||
'content' => $this->normalizeSearchText(isset($data['content']) ? $data['content'] : ''),
|
||||
'tags' => $this->normalizeSearchText(isset($data['tags']) ? $data['tags'] : ''),
|
||||
'category' => $this->normalizeSearchText(isset($data['category']) ? $data['category'] : '')
|
||||
);
|
||||
$fields['all'] = trim(implode(' ', $fields));
|
||||
|
||||
return $fields;
|
||||
}
|
||||
|
||||
private function searchableFields($data)
|
||||
{
|
||||
if (isset($data['search']) && is_array($data['search'])) {
|
||||
return $data['search'] + array(
|
||||
'title' => '',
|
||||
'description' => '',
|
||||
'content' => '',
|
||||
'tags' => '',
|
||||
'category' => '',
|
||||
'all' => ''
|
||||
);
|
||||
}
|
||||
|
||||
return $this->buildSearchFields($data);
|
||||
}
|
||||
|
||||
private function normalizeSearchText($text)
|
||||
{
|
||||
$text = $this->plainText($text);
|
||||
|
||||
if (function_exists('transliterator_transliterate')) {
|
||||
$transliterated = @transliterator_transliterate('Any-Latin; Latin-ASCII;', $text);
|
||||
if ($transliterated !== false) {
|
||||
$text = $transliterated;
|
||||
}
|
||||
} elseif (function_exists('iconv')) {
|
||||
$transliterated = @iconv('UTF-8', 'ASCII//TRANSLIT//IGNORE', $text);
|
||||
if ($transliterated !== false) {
|
||||
$text = $transliterated;
|
||||
}
|
||||
}
|
||||
|
||||
$text = mb_strtolower($text, 'UTF-8');
|
||||
$normalized = preg_replace('/[^\p{L}\p{N}]+/u', ' ', $text);
|
||||
if ($normalized === null) {
|
||||
$normalized = preg_replace('/[^a-z0-9]+/i', ' ', $text);
|
||||
}
|
||||
if ($normalized === null) {
|
||||
$normalized = $text;
|
||||
}
|
||||
$collapsed = preg_replace('/\s+/u', ' ', $normalized);
|
||||
if ($collapsed === null) {
|
||||
$collapsed = preg_replace('/\s+/', ' ', $normalized);
|
||||
}
|
||||
if ($collapsed === null) {
|
||||
$collapsed = $normalized;
|
||||
}
|
||||
|
||||
return trim((string) $collapsed);
|
||||
}
|
||||
|
||||
private function tokenizeSearchTerm($text)
|
||||
{
|
||||
$normalized = $this->normalizeSearchText($text);
|
||||
$words = preg_split('/\s+/u', $normalized, -1, PREG_SPLIT_NO_EMPTY);
|
||||
if (!is_array($words)) {
|
||||
return array();
|
||||
}
|
||||
|
||||
$tokens = array();
|
||||
foreach ($words as $word) {
|
||||
if (mb_strlen($word, 'UTF-8') >= 2) {
|
||||
$tokens[$word] = true;
|
||||
}
|
||||
}
|
||||
|
||||
return array_keys($tokens);
|
||||
}
|
||||
|
||||
private function scoreSearchResult($data, $query, $terms)
|
||||
{
|
||||
$fields = $this->searchableFields($data);
|
||||
$query = $this->normalizeSearchText($query);
|
||||
$score = 0;
|
||||
|
||||
if (!empty($query)) {
|
||||
$phraseWeights = array(
|
||||
'title' => 220,
|
||||
'tags' => 180,
|
||||
'category' => 160,
|
||||
'description' => 110,
|
||||
'content' => 70
|
||||
);
|
||||
|
||||
foreach ($phraseWeights as $field => $weight) {
|
||||
if (!empty($fields[$field]) && strpos($fields[$field], $query) !== false) {
|
||||
$score += $weight + min(60, $this->countOccurrences($fields[$field], $query) * 8);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
$matchedTerms = 0;
|
||||
foreach ($terms as $term) {
|
||||
$termScore = 0;
|
||||
$termScore += $this->scoreTermInField($fields['title'], $term, 95);
|
||||
$termScore += $this->scoreTermInField($fields['tags'], $term, 80);
|
||||
$termScore += $this->scoreTermInField($fields['category'], $term, 75);
|
||||
$termScore += $this->scoreTermInField($fields['description'], $term, 45);
|
||||
$termScore += $this->scoreTermInField($fields['content'], $term, 25);
|
||||
|
||||
if ($termScore === 0) {
|
||||
$termScore += $this->fuzzyTermScore($term, trim($fields['title'] . ' ' . $fields['tags'] . ' ' . $fields['category']), 24);
|
||||
$termScore += $this->fuzzyTermScore($term, $fields['content'], 10);
|
||||
}
|
||||
|
||||
if ($termScore > 0) {
|
||||
$matchedTerms++;
|
||||
$score += $termScore;
|
||||
}
|
||||
}
|
||||
|
||||
if ($matchedTerms === 0) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (count($terms) > 1) {
|
||||
if ($matchedTerms === count($terms)) {
|
||||
$score += 45;
|
||||
} else {
|
||||
$score -= (count($terms) - $matchedTerms) * 25;
|
||||
}
|
||||
}
|
||||
|
||||
return max(0, $score);
|
||||
}
|
||||
|
||||
private function scoreTermInField($field, $term, $weight)
|
||||
{
|
||||
if (empty($field)) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
$quoted = preg_quote($term, '/');
|
||||
$fullMatches = preg_match_all('/(^| )' . $quoted . '(?= |$)/u', $field, $matches);
|
||||
if ($fullMatches > 0) {
|
||||
return $weight + min(40, $fullMatches * 6);
|
||||
}
|
||||
|
||||
if (mb_strlen($term, 'UTF-8') >= 4 && strpos($field, $term) !== false) {
|
||||
return (int) ($weight * 0.55) + min(25, $this->countOccurrences($field, $term) * 4);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
private function countOccurrences($field, $needle)
|
||||
{
|
||||
if ($needle === '') {
|
||||
return 0;
|
||||
}
|
||||
|
||||
return substr_count($field, $needle);
|
||||
}
|
||||
|
||||
private function fuzzyTermScore($term, $field, $weight)
|
||||
{
|
||||
if (mb_strlen($term, 'UTF-8') < 4 || empty($field)) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
$words = preg_split('/\s+/u', $field, -1, PREG_SPLIT_NO_EMPTY);
|
||||
if (!is_array($words)) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
$bestScore = 0;
|
||||
$checked = array();
|
||||
$checkedCount = 0;
|
||||
$termLength = strlen($term);
|
||||
$allowedDistance = ($termLength <= 5) ? 1 : 2;
|
||||
|
||||
foreach ($words as $word) {
|
||||
if (isset($checked[$word])) {
|
||||
continue;
|
||||
}
|
||||
$checked[$word] = true;
|
||||
|
||||
if (strlen($word) > 64 || abs(strlen($word) - $termLength) > $allowedDistance) {
|
||||
continue;
|
||||
}
|
||||
|
||||
$checkedCount++;
|
||||
if ($checkedCount > 250) {
|
||||
break;
|
||||
}
|
||||
|
||||
$distance = levenshtein($term, $word);
|
||||
if ($distance <= $allowedDistance) {
|
||||
$bestScore = max($bestScore, $weight - ($distance * 5));
|
||||
}
|
||||
}
|
||||
|
||||
return $bestScore;
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user