159 lines
3.6 KiB
PHP
159 lines
3.6 KiB
PHP
<?php
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class TagCloudWidget extends Widget {
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static $db = array(
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"Title" => "Varchar",
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"Limit" => "Int",
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"Sortby" => "Varchar"
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);
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static $defaults = array(
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"Title" => "Tag Cloud",
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"Limit" => "0",
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"Sortby" => "alphabet"
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);
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static $cmsTitle = "Tag Cloud";
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static $description = "Shows a tag cloud of tags on your blog.";
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function getBlogHolder() {
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$page = Director::currentPage();
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if($page->is_a("BlogHolder")) {
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return $page;
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} else if($page->is_a("BlogEntry") && $page->getParent()->is_a("BlogHolder")) {
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return $page->getParent();
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} else {
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return DataObject::get_one("BlogHolder");
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}
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}
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function getCMSFields() {
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return new FieldSet(
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new TextField("Title", _t("TagCloudWidget.TILE", "Title")),
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new TextField("Limit", _t("TagCloudWidget.LIMIT", "Limit number of tags")),
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new OptionsetField("Sortby",_t("TagCloudWidget.SORTBY","Sort by"),array("alphabet"=>_t("TagCloudWidget.SBAL", "alphabet"),"frequency"=>_t("TagCloudWidget.SBFREQ", "frequency")))
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);
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}
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function Title() {
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return $this->Title ? $this->Title : 'Tag Cloud';
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}
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function TagsCollection() {
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Requirements::css("blog/css/tagcloud.css");
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$allTags = array();
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$max = 0;
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$blogHolder = $this->getBlogHolder();
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$entries = $blogHolder->Entries();
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if($entries) {
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foreach($entries as $entry) {
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$theseTags = split(" *, *", strtolower(trim($entry->Tags)));
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foreach($theseTags as $tag) {
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if($tag != "") {
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$allTags[$tag] = isset($allTags[$tag]) ? $allTags[$tag] + 1 : 1; //getting the count into key => value map
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$max = ($allTags[$tag] > $max) ? $allTags[$tag] : $max;
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}
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}
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}
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if($allTags) {
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//TODO: move some or all of the sorts to the database for more efficiency
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if($this->Limit > 0){
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uasort($allTags, array($this, "column_sort_by_popularity")); //sort by popularity
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$allTags = array_slice($allTags, 0, $this->Limit);
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}
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if($this->Sortby == "alphabet"){
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$this->natksort($allTags);
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}
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$sizes = array();
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foreach($allTags as $tag => $count){
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$sizes[$count] = true;
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}
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$numsizes = count($sizes)-1; //Work out the number of different sizes
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if($numsizes > 5){$numsizes = 5;}
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foreach($allTags as $tag => $count) {
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$popularity = floor($count / $max * $numsizes);
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switch($popularity) {
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case 0:
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$class = "not-popular";
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break;
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case 1:
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$class = "not-very-popular";
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break;
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case 2:
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$class = "somewhat-popular";
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break;
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case 3:
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$class = "popular";
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break;
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case 4:
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$class = "very-popular";
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break;
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case 5:
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$class = "ultra-popular";
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break;
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default:
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$class = "broken";
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break;
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}
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$allTags[$tag] = array(
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"Tag" => $tag,
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"Count" => $count,
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"Class" => $class,
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"Link" => $blogHolder->Link() . 'tag/' . urlencode($tag)
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);
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}
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}
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$output = new DataObjectSet();
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foreach($allTags as $tag => $fields) {
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$output->push(new ArrayData($fields));
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}
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return $output;
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}
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return;
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}
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/**
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* Helper method to compare 2 Vars to work out the results.
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* @param mixed
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* @param mixed
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* @return int
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*/
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private function column_sort_by_popularity($a, $b){
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if($a == $b) {
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$result = 0;
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}
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else {
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$result = $b - $a;
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}
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return $result;
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}
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private function natksort(&$aToBeSorted) {
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$aResult = array();
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$aKeys = array_keys($aToBeSorted);
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natcasesort($aKeys);
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foreach ($aKeys as $sKey) {
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$aResult[$sKey] = $aToBeSorted[$sKey];
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}
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$aToBeSorted = $aResult;
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return true;
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}
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}
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?>
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