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class.datasource.section.php
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class.datasource.section.php
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<?php
/**
* @package data-sources
*/
/**
* The `SectionDatasource` allows a user to retrieve entries from a given
* section on the Frontend. This datasource type exposes the filtering provided
* by the Fields in the given section to narrow the result set down. The resulting
* entries can be grouped, sorted and allows pagination. Results can be chained
* from other `SectionDatasource`'s using output parameters.
*
* @since Symphony 2.3
* @link http://getsymphony.com/learn/concepts/view/data-sources/
*/
class SectionDatasource extends Datasource
{
/**
* An array of Field objects that this Datasource has created to display
* the results.
*/
private static $_fieldPool = array();
/**
* An array of the Symphony meta data parameters.
*/
private static $_system_parameters = array(
'system:id',
'system:author',
'system:creation-date',
'system:modification-date',
'system:date' // deprecated
);
/**
* Set's the Section ID that this Datasource will use as it's source
*
* @param integer $source
*/
public function setSource($source)
{
$this->_source = (int)$source;
}
/**
* Return's the Section ID that this datasource is using as it's source
*
* @return integer
*/
public function getSource()
{
return $this->_source;
}
/**
* If this Datasource requires System Parameters to be output, this function
* will return true, otherwise false.
*
* @return boolean
*/
public function canProcessSystemParameters()
{
if (!is_array($this->dsParamPARAMOUTPUT)) {
return false;
}
foreach (self::$_system_parameters as $system_parameter) {
if (in_array($system_parameter, $this->dsParamPARAMOUTPUT) === true) {
return true;
}
}
return false;
}
/**
* Given a name for the group, and an associative array that
* contains three keys, `attr`, `records` and `groups`. Grouping
* of Entries is done by the grouping Field at a PHP level, not
* through the Database.
*
* @param string $element
* The name for the XML node for this group
* @param array $group
* An associative array of the group data, includes `attr`, `records`
* and `groups` keys.
* @throws Exception
* @return XMLElement
*/
public function processRecordGroup($element, array $group)
{
$xGroup = new XMLElement($element, null, $group['attr']);
if (is_array($group['records']) && !empty($group['records'])) {
if (isset($group['records'][0])) {
$data = $group['records'][0]->getData();
$pool = FieldManager::fetch(array_keys($data));
self::$_fieldPool += $pool;
}
foreach ($group['records'] as $entry) {
$xEntry = $this->processEntry($entry);
if ($xEntry instanceof XMLElement) {
$xGroup->appendChild($xEntry);
}
}
}
if (is_array($group['groups']) && !empty($group['groups'])) {
foreach ($group['groups'] as $element => $group) {
foreach ($group as $g) {
$xGroup->appendChild(
$this->processRecordGroup($element, $g)
);
}
}
}
if (!$this->_param_output_only) {
return $xGroup;
}
}
/**
* Given an Entry object, this function will generate an XML representation
* of the Entry to be returned. It will also add any parameters selected
* by this datasource to the parameter pool.
*
* @param Entry $entry
* @throws Exception
* @return XMLElement|boolean
* Returns boolean when only parameters are to be returned.
*/
public function processEntry(Entry $entry)
{
$data = $entry->getData();
$xEntry = new XMLElement('entry');
$xEntry->setAttribute('id', $entry->get('id'));
if (!empty($this->_associated_sections)) {
$this->setAssociatedEntryCounts($xEntry, $entry);
}
if ($this->_can_process_system_parameters) {
$this->processSystemParameters($entry);
}
foreach ($data as $field_id => $values) {
if (!isset(self::$_fieldPool[$field_id]) || !is_object(self::$_fieldPool[$field_id])) {
self::$_fieldPool[$field_id] = FieldManager::fetch($field_id);
}
$this->processOutputParameters($entry, $field_id, $values);
if (!$this->_param_output_only) {
foreach ($this->dsParamINCLUDEDELEMENTS as $handle) {
list($handle, $mode) = preg_split('/\s*:\s*/', $handle, 2);
if (self::$_fieldPool[$field_id]->get('element_name') == $handle) {
self::$_fieldPool[$field_id]->appendFormattedElement($xEntry, $values, ($this->dsParamHTMLENCODE === 'yes' ? true : false), $mode, $entry->get('id'));
}
}
}
}
if ($this->_param_output_only) {
return true;
}
// This is deprecated and will be removed in Symphony 3.0.0
if (in_array('system:date', $this->dsParamINCLUDEDELEMENTS)) {
if (Symphony::Log()) {
Symphony::Log()->pushDeprecateWarningToLog('system:date', 'system:creation-date` or `system:modification-date', array(
'message-format' => __('The `%s` data source field is deprecated.')
));
}
$xDate = new XMLElement('system-date');
$xDate->appendChild(
General::createXMLDateObject(
DateTimeObj::get('U', $entry->get('creation_date')),
'created'
)
);
$xDate->appendChild(
General::createXMLDateObject(
DateTimeObj::get('U', $entry->get('modification_date')),
'modified'
)
);
$xEntry->appendChild($xDate);
}
return $xEntry;
}
/**
* An entry may be associated to other entries from various fields through
* the section associations. This function will set the number of related
* entries as attributes to the main `<entry>` element grouped by the
* related entry's section.
*
* @param XMLElement $xEntry
* The <entry> XMLElement that the associated section counts will
* be set on
* @param Entry $entry
* The current entry object
* @throws Exception
*/
public function setAssociatedEntryCounts(XMLElement &$xEntry, Entry $entry)
{
$associated_entry_counts = $entry->fetchAllAssociatedEntryCounts($this->_associated_sections);
if (!empty($associated_entry_counts)) {
foreach ($associated_entry_counts as $section_id => $fields) {
foreach ($this->_associated_sections as $section) {
if ($section['id'] != $section_id) {
continue;
}
// For each related field show the count (#2083)
foreach ($fields as $field_id => $count) {
$field_handle = FieldManager::fetchHandleFromID($field_id);
$section_handle = $section['handle'];
// Make sure attribute does not begin with a digit
if (preg_match('/^[0-9]/', $section_handle)) {
$section_handle = 'x-' . $section_handle;
}
if ($field_handle) {
$xEntry->setAttribute($section_handle . '-' . $field_handle, (string)$count);
}
// Backwards compatibility (without field handle)
$xEntry->setAttribute($section_handle, (string)$count);
}
}
}
}
}
/**
* Given an Entry object, this function will iterate over the `dsParamPARAMOUTPUT`
* setting to see any of the Symphony system parameters need to be set.
* The current system parameters supported are `system:id`, `system:author`,
* `system:creation-date` and `system:modification-date`.
* If these parameters are found, the result is added
* to the `$param_pool` array using the key, `ds-datasource-handle.parameter-name`
* For the moment, this function also supports the pre Symphony 2.3 syntax,
* `ds-datasource-handle` which did not support multiple parameters.
*
* @param Entry $entry
* The Entry object that contains the values that may need to be added
* into the parameter pool.
*/
public function processSystemParameters(Entry $entry)
{
if (!isset($this->dsParamPARAMOUTPUT)) {
return;
}
// Support the legacy parameter `ds-datasource-handle`
$key = 'ds-' . $this->dsParamROOTELEMENT;
$singleParam = count($this->dsParamPARAMOUTPUT) == 1;
foreach ($this->dsParamPARAMOUTPUT as $param) {
// The new style of paramater is `ds-datasource-handle.field-handle`
$param_key = $key . '.' . str_replace(':', '-', $param);
if ($param === 'system:id') {
$this->_param_pool[$param_key][] = $entry->get('id');
if ($singleParam) {
$this->_param_pool[$key][] = $entry->get('id');
}
} elseif ($param === 'system:author') {
$this->_param_pool[$param_key][] = $entry->get('author_id');
if ($singleParam) {
$this->_param_pool[$key][] = $entry->get('author_id');
}
} elseif ($param === 'system:creation-date' || $param === 'system:date') {
if ($param === 'system:date' && Symphony::Log()) {
Symphony::Log()->pushDeprecateWarningToLog('system:date', 'system:creation-date', array(
'message-format' => __('The `%s` data source output parameter is deprecated.')
));
}
$this->_param_pool[$param_key][] = $entry->get('creation_date');
if ($singleParam) {
$this->_param_pool[$key][] = $entry->get('creation_date');
}
} elseif ($param === 'system:modification-date') {
$this->_param_pool[$param_key][] = $entry->get('modification_date');
if ($singleParam) {
$this->_param_pool[$key][] = $entry->get('modification_date');
}
}
}
}
/**
* Given an Entry object, a `$field_id` and an array of `$data`, this
* function iterates over the `dsParamPARAMOUTPUT` and will call the
* field's (identified by `$field_id`) `getParameterPoolValue` function
* to add parameters to the `$this->_param_pool`.
*
* @param Entry $entry
* @param integer $field_id
* @param array $data
*/
public function processOutputParameters(Entry $entry, $field_id, array $data)
{
if (!isset($this->dsParamPARAMOUTPUT)) {
return;
}
// Support the legacy parameter `ds-datasource-handle`
$key = 'ds-' . $this->dsParamROOTELEMENT;
$singleParam = count($this->dsParamPARAMOUTPUT) == 1;
if ($singleParam && (!isset($this->_param_pool[$key]) || !is_array($this->_param_pool[$key]))) {
$this->_param_pool[$key] = array();
}
foreach ($this->dsParamPARAMOUTPUT as $param) {
if (self::$_fieldPool[$field_id]->get('element_name') !== $param) {
continue;
}
// The new style of paramater is `ds-datasource-handle.field-handle`
$param_key = $key . '.' . str_replace(':', '-', $param);
if (!isset($this->_param_pool[$param_key]) || !is_array($this->_param_pool[$param_key])) {
$this->_param_pool[$param_key] = array();
}
$param_pool_values = self::$_fieldPool[$field_id]->getParameterPoolValue($data, $entry->get('id'));
if (is_array($param_pool_values)) {
$this->_param_pool[$param_key] = array_merge($param_pool_values, $this->_param_pool[$param_key]);
if ($singleParam) {
$this->_param_pool[$key] = array_merge($param_pool_values, $this->_param_pool[$key]);
}
} elseif (!is_null($param_pool_values)) {
$this->_param_pool[$param_key][] = $param_pool_values;
if ($singleParam) {
$this->_param_pool[$key][] = $param_pool_values;
}
}
}
}
/**
* This function iterates over `dsParamFILTERS` and builds the relevant
* `$where` and `$joins` parameters with SQL. This SQL is generated from
* `Field->buildDSRetrievalSQL`. A third parameter, `$group` is populated
* with boolean from `Field->requiresSQLGrouping()`
*
* @param string $where
* @param string $joins
* @param boolean $group
* @throws Exception
*/
public function processFilters(&$where, &$joins, &$group)
{
if (!is_array($this->dsParamFILTERS) || empty($this->dsParamFILTERS)) {
return;
}
$pool = FieldManager::fetch(array_filter(array_keys($this->dsParamFILTERS), 'is_int'));
self::$_fieldPool += $pool;
if (!is_string($where)) {
$where = '';
}
foreach ($this->dsParamFILTERS as $field_id => $filter) {
if ((is_array($filter) && empty($filter)) || trim($filter) == '') {
continue;
}
if (!is_array($filter)) {
$filter_type = Datasource::determineFilterType($filter);
$value = Datasource::splitFilter($filter_type, $filter);
} else {
$filter_type = Datasource::FILTER_OR;
$value = $filter;
}
if (!in_array($field_id, self::$_system_parameters) && $field_id != 'id' && !(self::$_fieldPool[$field_id] instanceof Field)) {
throw new Exception(
__(
'Error creating field object with id %1$d, for filtering in data source %2$s. Check this field exists.',
array($field_id, '<code>' . $this->dsParamROOTELEMENT . '</code>')
)
);
}
// Support system:id as well as the old 'id'. #1691
if ($field_id === 'system:id' || $field_id === 'id') {
if ($filter_type == Datasource::FILTER_AND) {
$value = array_map(function ($val) {
return explode(',', $val);
}, $value);
} else {
$value = array($value);
}
foreach ($value as $v) {
$c = 'IN';
if (stripos($v[0], 'not:') === 0) {
$v[0] = preg_replace('/^not:\s*/', null, $v[0]);
$c = 'NOT IN';
}
// Cast all ID's to integers. (RE: #2191)
$v = array_map(function ($val) {
$val = General::intval($val);
// General::intval can return -1, so reset that to 0
// so there are no side effects for the following
// array_sum and array_filter calls. RE: #2475
if ($val === -1) {
$val = 0;
}
return $val;
}, $v);
$count = array_sum($v);
$v = array_filter($v);
// If the ID was cast to 0, then we need to filter on 'id' = 0,
// which will of course return no results, but without it the
// Datasource will return ALL results, which is not the
// desired behaviour. RE: #1619
if ($count === 0) {
$v[] = 0;
}
// If there are no ID's, no need to filter. RE: #1567
if (!empty($v)) {
$where .= " AND `e`.id " . $c . " (".implode(", ", $v).") ";
}
}
} elseif ($field_id === 'system:creation-date' || $field_id === 'system:modification-date' || $field_id === 'system:date') {
if ($field_id === 'system:date' && Symphony::Log()) {
Symphony::Log()->pushDeprecateWarningToLog('system:date', 'system:creation-date` or `system:modification-date', array(
'message-format' => __('The `%s` data source filter is deprecated.')
));
}
$date_joins = '';
$date_where = '';
$date = new FieldDate();
$date->buildDSRetrievalSQL($value, $date_joins, $date_where, ($filter_type == Datasource::FILTER_AND ? true : false));
// Replace the date field where with the `creation_date` or `modification_date`.
$date_where = preg_replace('/`t\d+`.date/', ($field_id !== 'system:modification-date') ? '`e`.creation_date_gmt' : '`e`.modification_date_gmt', $date_where);
$where .= $date_where;
} else {
if (!self::$_fieldPool[$field_id]->buildDSRetrievalSQL($value, $joins, $where, ($filter_type == Datasource::FILTER_AND ? true : false))) {
$this->_force_empty_result = true;
return;
}
if (!$group) {
$group = self::$_fieldPool[$field_id]->requiresSQLGrouping();
}
}
}
}
public function execute(array &$param_pool = null)
{
$result = new XMLElement($this->dsParamROOTELEMENT);
$this->_param_pool = $param_pool;
$where = null;
$joins = null;
$group = false;
if (!$section = SectionManager::fetch((int)$this->getSource())) {
$about = $this->about();
trigger_error(__('The Section, %s, associated with the Data source, %s, could not be found.', array($this->getSource(), '<code>' . $about['name'] . '</code>')), E_USER_ERROR);
}
$sectioninfo = new XMLElement('section', General::sanitize($section->get('name')), array(
'id' => $section->get('id'),
'handle' => $section->get('handle')
));
if ($this->_force_empty_result == true) {
if ($this->dsParamREDIRECTONREQUIRED === 'yes') {
throw new FrontendPageNotFoundException;
}
$this->_force_empty_result = false; //this is so the section info element doesn't disappear.
$error = new XMLElement('error', __("Data source not executed, required parameter is missing."), array(
'required-param' => $this->dsParamREQUIREDPARAM
));
$result->appendChild($error);
$result->prependChild($sectioninfo);
return $result;
}
if ($this->_negate_result == true) {
if ($this->dsParamREDIRECTONFORBIDDEN === 'yes') {
throw new FrontendPageNotFoundException;
}
$this->_negate_result = false; //this is so the section info element doesn't disappear.
$result = $this->negateXMLSet();
$result->prependChild($sectioninfo);
return $result;
}
if (is_array($this->dsParamINCLUDEDELEMENTS)) {
$include_pagination_element = in_array('system:pagination', $this->dsParamINCLUDEDELEMENTS);
} else {
$this->dsParamINCLUDEDELEMENTS = array();
}
if (isset($this->dsParamPARAMOUTPUT) && !is_array($this->dsParamPARAMOUTPUT)) {
$this->dsParamPARAMOUTPUT = array($this->dsParamPARAMOUTPUT);
}
$this->_can_process_system_parameters = $this->canProcessSystemParameters();
if (!isset($this->dsParamPAGINATERESULTS)) {
$this->dsParamPAGINATERESULTS = 'yes';
}
// Process Filters
$this->processFilters($where, $joins, $group);
// Process Sorting
if ($this->dsParamSORT == 'system:id') {
EntryManager::setFetchSorting('system:id', $this->dsParamORDER);
} elseif ($this->dsParamSORT == 'system:date' || $this->dsParamSORT == 'system:creation-date') {
if ($this->dsParamSORT === 'system:date' && Symphony::Log()) {
Symphony::Log()->pushDeprecateWarningToLog('system:date', 'system:creation-date', array(
'message-format' => __('The `%s` data source sort is deprecated.')
));
}
EntryManager::setFetchSorting('system:creation-date', $this->dsParamORDER);
} elseif ($this->dsParamSORT == 'system:modification-date') {
EntryManager::setFetchSorting('system:modification-date', $this->dsParamORDER);
} else {
EntryManager::setFetchSorting(
FieldManager::fetchFieldIDFromElementName($this->dsParamSORT, $this->getSource()),
$this->dsParamORDER
);
}
// combine `INCLUDEDELEMENTS`, `PARAMOUTPUT` and `GROUP` into an
// array of field handles to optimise the `EntryManager` queries
$datasource_schema = $this->dsParamINCLUDEDELEMENTS;
if (is_array($this->dsParamPARAMOUTPUT)) {
$datasource_schema = array_merge($datasource_schema, $this->dsParamPARAMOUTPUT);
}
if ($this->dsParamGROUP) {
$datasource_schema[] = FieldManager::fetchHandleFromID($this->dsParamGROUP);
}
$entries = EntryManager::fetchByPage(
($this->dsParamPAGINATERESULTS === 'yes' && $this->dsParamSTARTPAGE > 0 ? $this->dsParamSTARTPAGE : 1),
$this->getSource(),
($this->dsParamPAGINATERESULTS === 'yes' && $this->dsParamLIMIT >= 0 ? $this->dsParamLIMIT : null),
$where,
$joins,
$group,
(!$include_pagination_element ? true : false),
true,
array_unique($datasource_schema)
);
/**
* Immediately after building entries allow modification of the Data Source entries array
*
* @delegate DataSourceEntriesBuilt
* @param string $context
* '/frontend/'
* @param Datasource $datasource
* @param array $entries
* @param array $filters
*/
Symphony::ExtensionManager()->notifyMembers('DataSourceEntriesBuilt', '/frontend/', array(
'datasource' => &$this,
'entries' => &$entries,
'filters' => $this->dsParamFILTERS
));
$entries_per_page = ($this->dsParamPAGINATERESULTS === 'yes' && isset($this->dsParamLIMIT) && $this->dsParamLIMIT >= 0 ? $this->dsParamLIMIT : $entries['total-entries']);
if (($entries['total-entries'] <= 0 || $include_pagination_element === true) && (!is_array($entries['records']) || empty($entries['records'])) || $this->dsParamSTARTPAGE == '0') {
if ($this->dsParamREDIRECTONEMPTY === 'yes') {
throw new FrontendPageNotFoundException;
}
$this->_force_empty_result = false;
$result = $this->emptyXMLSet();
$result->prependChild($sectioninfo);
if ($include_pagination_element) {
$pagination_element = General::buildPaginationElement(0, 0, $entries_per_page);
if ($pagination_element instanceof XMLElement && $result instanceof XMLElement) {
$result->prependChild($pagination_element);
}
}
} else {
if (!$this->_param_output_only) {
$result->appendChild($sectioninfo);
if ($include_pagination_element) {
$pagination_element = General::buildPaginationElement(
$entries['total-entries'],
$entries['total-pages'],
$entries_per_page,
($this->dsParamPAGINATERESULTS === 'yes' && $this->dsParamSTARTPAGE > 0 ? $this->dsParamSTARTPAGE : 1)
);
if ($pagination_element instanceof XMLElement && $result instanceof XMLElement) {
$result->prependChild($pagination_element);
}
}
}
// If this datasource has a Limit greater than 0 or the Limit is not set
if (!isset($this->dsParamLIMIT) || $this->dsParamLIMIT > 0) {
if (!isset($this->dsParamASSOCIATEDENTRYCOUNTS) || $this->dsParamASSOCIATEDENTRYCOUNTS === 'yes') {
$this->_associated_sections = $section->fetchChildAssociations();
}
// If the datasource require's GROUPING
if (isset($this->dsParamGROUP)) {
self::$_fieldPool[$this->dsParamGROUP] = FieldManager::fetch($this->dsParamGROUP);
if (self::$_fieldPool[$this->dsParamGROUP] == null) {
throw new SymphonyErrorPage(vsprintf("The field used for grouping '%s' cannot be found.", $this->dsParamGROUP));
}
$groups = self::$_fieldPool[$this->dsParamGROUP]->groupRecords($entries['records']);
foreach ($groups as $element => $group) {
foreach ($group as $g) {
$result->appendChild(
$this->processRecordGroup($element, $g)
);
}
}
} else {
if (isset($entries['records'][0])) {
$data = $entries['records'][0]->getData();
$pool = FieldManager::fetch(array_keys($data));
self::$_fieldPool += $pool;
}
foreach ($entries['records'] as $entry) {
$xEntry = $this->processEntry($entry);
if ($xEntry instanceof XMLElement) {
$result->appendChild($xEntry);
}
}
}
}
}
$param_pool = $this->_param_pool;
return $result;
}
}