/**
* 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 int $limit Limit to the amount of items returned.
*
* @returns ArrayList List of cleaned records.
*/
public function getDiffList($highestVersion = null, $limit = 100)
{
// 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 . "'" : '';
// Get just enough elements for diffing. We need one more than desired to have something to compare to.
$qLimit = (int) $limit + 1;
$versions = $this->owner->allVersions("\"WasPublished\"='1' AND \"CanViewType\" IN ('Anyone', 'Inherit') {$offset}", "\"LastEdited\" DESC", $qLimit);
// Process the list to add the comparisons.
$changeList = new ArrayList();
$previous = null;
$count = 0;
foreach ($versions as $version) {
$changed = false;
// Check if we have something to compare with.
if (isset($previous)) {
// Produce the diff fields for use in the template.
if ($version->Title != $previous->Title) {
$diffTitle = Diff::compareHTML($version->Title, $previous->Title);
$version->DiffTitle = new HTMLText();
$version->DiffTitle->setValue(sprintf('<div><em>%s</em> ' . $diffTitle . '</div>', _t('RSSHistory.TITLECHANGED', 'Title has changed:')));
$changed = true;
}
if ($version->Content != $previous->Content) {
$diffContent = Diff::compareHTML($version->Content, $previous->Content);
$version->DiffContent = new HTMLText();
$version->DiffContent->setValue('<div>' . $diffContent . '</div>');
$changed = true;
}
// Copy the link so it can be cached by SS_Cache.
$version->GeneratedLink = $version->AbsoluteLink();
}
// Omit the versions that haven't been visibly changed (only takes the above fields into consideration).
if ($changed) {
$changeList->push($version);
$count++;
}
// Store the last version for comparison.
$previous = $version;
}
// Make sure enough diff items have been generated to satisfy the $limit. If we ran out, add the final,
// non-diffed item (the initial version). This will also work for a single-diff request: if we are requesting
// a diff on the initial version we will just get that version, verbatim.
if ($previous && $versions->count() < $qLimit) {
$first = clone $previous;
$first->DiffContent = new HTMLText();
$first->DiffContent->setValue('<div>' . $first->Content . '</div>');
// Copy the link so it can be cached by SS_Cache.
$first->GeneratedLink = $first->AbsoluteLink();
$changeList->push($first);
}
return $changeList;
}
/**
* @see https://groups.google.com/forum/#!topic/silverstripe-dev/yHcluCvuszo
*/
public function testTableDiff()
{
if (!class_exists('DOMDocument')) {
$this->markTestSkipped('"DOMDocument" required');
return;
}
$from = "<table> \n\t\t<tbody> \n\t\t\t<tr class=\"blah\"> \n\t\t\t\t<td colspan=\"2\">Row 1</td> \n\t\t\t</tr> \n\t\t\t<tr class=\"foo\"> \n\t\t\t\t<td>Row 2</td> \n\t\t\t\t<td>Row 2</td> \n\t\t\t</tr> \n\t\t\t<tr> \n\t\t\t\t<td>Row 3</td> \n\t\t\t\t<td>Row 3</td> \n\t\t\t</tr> \n\t\t\t</tbody> \n\t\t</table>";
$to = "<table class=\"new-class\"> \n\t\t<tbody> \n\t\t\t<tr class=\"blah\"> \n\t\t\t\t<td colspan=\"2\">Row 1</td> \n\t\t\t</tr> \n\t\t\t<tr class=\"foo\"> \n\t\t\t\t<td>Row 2</td> \n\t\t\t\t<td>Row 2</td> \n\t\t\t</tr> \n\t\t</tbody> \n\t\t</table>";
$expected = "<ins>" . $to . "</ins>" . "<del>" . $from . "</del>";
$compare = Diff::compareHTML($from, $to);
// Very hard to debug this way, wouldn't need to do this if PHP had an *actual* DOM parsing lib,
// and not just the poor excuse that is DOMDocument
$compare = preg_replace('/[\\s\\t\\n\\r]*/', '', $compare);
$expected = preg_replace('/[\\s\\t\\n\\r]*/', '', $expected);
$this->assertEquals($compare, $expected);
}
/**
* Get a SS_List of the changed fields.
* Each element is an array data containing
* - Name: The field name
* - Title: The human-readable field title
* - Diff: An HTML diff showing the changes
* - From: The older version of the field
* - To: The newer version of the field
*/
function ChangedFields()
{
$changedFields = new ArrayList();
if ($this->fromRecord) {
$base = $this->fromRecord;
$fields = array_keys($this->fromRecord->toMap());
} else {
$base = $this->toRecord;
$fields = array_keys($this->toRecord->toMap());
}
foreach ($fields as $field) {
if (in_array($field, $this->ignoredFields)) {
continue;
}
if (!$this->fromRecord || $this->fromRecord->{$field} != $this->toRecord->{$field}) {
// Only show HTML diffs for fields which allow HTML values in the first place
$fieldObj = $this->toRecord->dbObject($field);
if ($this->fromRecord) {
$fieldDiff = Diff::compareHTML($this->fromRecord->{$field}, $this->toRecord->{$field}, !$fieldObj || $fieldObj->stat('escape_type') != 'xml');
} else {
if ($fieldObj && $fieldObj->stat('escape_type') == 'xml') {
$fieldDiff = "<ins>" . $this->toRecord->{$field} . "</ins>";
} else {
$fieldDiff = "<ins>" . Convert::raw2xml($this->toRecord->{$field}) . "</ins>";
}
}
$changedFields->push(new ArrayData(array('Name' => $field, 'Title' => $base->fieldLabel($field), 'Diff' => $this->fromRecord ? Diff::compareHTML($this->fromRecord->{$field}, $this->toRecord->{$field}) : "<ins>" . $this->toRecord->{$field} . "</ins>", 'From' => $this->fromRecord ? $this->fromRecord->{$field} : null, 'To' => $this->toRecord ? $this->toRecord->{$field} : null)));
}
}
return $changedFields;
}
/**
* Get a DataObjectSet of the changed fields.
* Each element is an array data containing
* - Name: The field name
* - Title: The human-readable field title
* - Diff: An HTML diff showing the changes
* - From: The older version of the field
* - To: The newer version of the field
*/
function ChangedFields()
{
$changedFields = new DataObjectSet();
if ($this->fromRecord) {
$base = $this->fromRecord;
$fields = array_keys($this->fromRecord->getAllFields());
} else {
$base = $this->toRecord;
$fields = array_keys($this->toRecord->getAllFields());
}
foreach ($fields as $field) {
if (in_array($field, $this->ignoredFields)) {
continue;
}
if (!$this->fromRecord || $this->fromRecord->{$field} != $this->toRecord->{$field}) {
$changedFields->push(new ArrayData(array('Name' => $field, 'Title' => $base->fieldLabel($field), 'Diff' => $this->fromRecord ? Diff::compareHTML($this->fromRecord->{$field}, $this->toRecord->{$field}) : "<ins>" . $this->toRecord->{$field} . "</ins>", 'From' => $this->fromRecord ? $this->fromRecord->{$field} : null, 'To' => $this->toRecord ? $this->toRecord->{$field} : null)));
}
}
return $changedFields;
}
/**
* Compare two version, and return the diff between them.
* @param string $from The version to compare from.
* @param string $to The version to compare to.
* @return DataObject
*/
function compareVersions($from, $to)
{
$fromRecord = Versioned::get_version($this->owner->class, $this->owner->ID, $from);
$toRecord = Versioned::get_version($this->owner->class, $this->owner->ID, $to);
$fields = array_keys($fromRecord->getAllFields());
foreach ($fields as $field) {
if (in_array($field, array("ID", "Version", "RecordID", "AuthorID", "ParentID"))) {
continue;
}
$fromRecord->{$field} = Diff::compareHTML($fromRecord->{$field}, $toRecord->{$field});
}
return $fromRecord;
}