silverstripe-versionfeed/code/VersionFeed.php

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PHP
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2012-11-26 01:22:30 +01:00
<?php
class VersionFeed extends SiteTreeExtension {
static $db = array(
'PublicHistory' => 'Boolean'
);
static $defaults = array(
'PublicHistory' => true
);
/**
* Compile a list of changes to the current page, excluding non-published and explicitly secured versions.
*
* @param int $highestVersion Top version number to consider.
* @param boolean $fullHistory Whether to get the full change history or just the previous version.
*
* @returns ArrayList List of cleaned records.
*/
public function getDiffedChanges($highestVersion = null, $fullHistory = true) {
// This can leak secured content if it was protected via inherited setting.
// For now the users will need to be aware about this shortcoming.
$offset = $highestVersion ? "AND \"SiteTree_versions\".\"Version\"<='".(int)$highestVersion."'" : '';
$limit = $fullHistory ? null : 2;
$versions = $this->owner->allVersions("\"WasPublished\"='1' AND \"CanViewType\" IN ('Anyone', 'Inherit') $offset", "\"LastEdited\" DESC", $limit);
// Process the list to add the comparisons.
$changeList = new ArrayList();
$previous = null;
$count = 0;
foreach ($versions as $version) {
$changed = false;
if (isset($previous)) {
// We have something to compare with.
$diff = $this->owner->compareVersions($version->Version, $previous->Version);
// Produce the diff fields for use in the template.
if ($version->Title != $previous->Title) {
$version->DiffTitle = new HTMLText();
$version->DiffTitle->setValue(
sprintf(
'<div><em>%s</em>' . $diff->Title . '</div>',
_t('RSSHistory.TITLECHANGED', 'Title has changed:')
)
);
$changed = true;
}
if ($version->Content != $previous->Content) {
$version->DiffContent = new HTMLText();
$version->DiffContent->setValue('<div>'.$diff->obj('Content')->forTemplate().'</div>');
$changed = true;
}
}
// Omit the versions that haven't been visibly changed (only takes the above fields into consideration).
if ($changed) {
$changeList->push($version);
$count++;
}
// Store the last version for comparison.
$previous = $version;
}
if ($fullHistory && $previous) {
$first = clone($previous);
$first->DiffContent = new HTMLText();
$first->DiffContent->setValue('<div>' . $first->obj('Content')->forTemplate() . '</div>');
$changeList->push($first);
}
return $changeList;
}
public function updateSettingsFields(FieldList $fields) {
// Add public history field.
$fields->addFieldToTab('Root.Settings', $publicHistory = new FieldGroup(
new CheckboxField('PublicHistory', $this->owner->fieldLabel(_t(
'RSSHistory.LABEL',
'Publish public RSS feed containing every published version of this page.'))
)));
$publicHistory->setTitle($this->owner->fieldLabel('Public history'));
}
public function getSiteRSSLink() {
// TODO: This link should be from the homepage, not this page.
return $this->owner->Link('allchanges');
}
public function getDefaultRSSLink() {
if ($this->owner->PublicHistory) return $this->owner->Link('changes');
}
}