94 lines
3.0 KiB
PHP
94 lines
3.0 KiB
PHP
<?php
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class VersionFeed extends SiteTreeExtension {
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static $db = array(
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'PublicHistory' => 'Boolean'
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);
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static $defaults = array(
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'PublicHistory' => true
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);
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/**
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* Compile a list of changes to the current page, excluding non-published and explicitly secured versions.
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*
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* @param int $highestVersion Top version number to consider.
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* @param boolean $fullHistory Whether to get the full change history or just the previous version.
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*
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* @returns ArrayList List of cleaned records.
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*/
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public function getDiffedChanges($highestVersion = null, $fullHistory = true) {
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// This can leak secured content if it was protected via inherited setting.
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// For now the users will need to be aware about this shortcoming.
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$offset = $highestVersion ? "AND \"SiteTree_versions\".\"Version\"<='".(int)$highestVersion."'" : '';
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$limit = $fullHistory ? null : 2;
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$versions = $this->owner->allVersions("\"WasPublished\"='1' AND \"CanViewType\" IN ('Anyone', 'Inherit') $offset", "\"LastEdited\" DESC", $limit);
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// Process the list to add the comparisons.
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$changeList = new ArrayList();
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$previous = null;
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$count = 0;
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foreach ($versions as $version) {
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$changed = false;
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if (isset($previous)) {
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// We have something to compare with.
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$diff = $this->owner->compareVersions($version->Version, $previous->Version);
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// Produce the diff fields for use in the template.
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if ($version->Title != $previous->Title) {
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$version->DiffTitle = new HTMLText();
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$version->DiffTitle->setValue(
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sprintf(
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'<div><em>%s</em>' . $diff->Title . '</div>',
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_t('RSSHistory.TITLECHANGED', 'Title has changed:')
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)
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);
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$changed = true;
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}
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if ($version->Content != $previous->Content) {
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$version->DiffContent = new HTMLText();
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$version->DiffContent->setValue('<div>'.$diff->obj('Content')->forTemplate().'</div>');
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$changed = true;
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}
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}
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// Omit the versions that haven't been visibly changed (only takes the above fields into consideration).
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if ($changed) {
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$changeList->push($version);
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$count++;
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}
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// Store the last version for comparison.
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$previous = $version;
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}
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if ($fullHistory && $previous) {
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$first = clone($previous);
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$first->DiffContent = new HTMLText();
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$first->DiffContent->setValue('<div>' . $first->obj('Content')->forTemplate() . '</div>');
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$changeList->push($first);
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}
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return $changeList;
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}
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public function updateSettingsFields(FieldList $fields) {
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// Add public history field.
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$fields->addFieldToTab('Root.Settings', $publicHistory = new FieldGroup(
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new CheckboxField('PublicHistory', $this->owner->fieldLabel(_t(
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'RSSHistory.LABEL',
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'Publish public RSS feed containing every published version of this page.'))
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)));
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$publicHistory->setTitle($this->owner->fieldLabel('Public history'));
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}
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public function getSiteRSSLink() {
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// TODO: This link should be from the homepage, not this page.
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return $this->owner->Link('allchanges');
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}
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public function getDefaultRSSLink() {
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if ($this->owner->PublicHistory) return $this->owner->Link('changes');
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}
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} |