/**
* Get the columns from a database table.
*
* @param string $tableName Table name. If null current table is used
*
* @return mixed An array of the field names, or false if an error occurs.
*/
public function getTableFields($tableName = null)
{
// Should I load the cached data?
$useCache = array_key_exists('use_table_cache', $this->config) ? $this->config['use_table_cache'] : false;
// Make sure we have a list of tables in this db
if (empty(self::$tableCache)) {
if ($useCache) {
// Try to load table cache from a cache file
$cacheData = FOFPlatform::getInstance()->getCache('tables', null);
// Unserialise the cached data, or set the table cache to empty
// if the cache data wasn't loaded.
if (!is_null($cacheData)) {
self::$tableCache = json_decode($cacheData, true);
} else {
self::$tableCache = array();
}
}
// This check is true if the cache data doesn't exist / is not loaded
if (empty(self::$tableCache)) {
self::$tableCache = $this->_db->getTableList();
if ($useCache) {
FOFPlatform::getInstance()->setCache('tables', json_encode(self::$tableCache));
}
}
}
// Make sure the cached table fields cache is loaded
if (empty(self::$tableFieldCache)) {
if ($useCache) {
// Try to load table cache from a cache file
$cacheData = FOFPlatform::getInstance()->getCache('tablefields', null);
// Unserialise the cached data, or set to empty if the cache
// data wasn't loaded.
if (!is_null($cacheData)) {
$decoded = json_decode($cacheData, true);
$tableCache = array();
if (count($decoded)) {
foreach ($decoded as $myTableName => $tableFields) {
$temp = array();
if (is_array($tableFields)) {
foreach ($tableFields as $field => $def) {
$temp[$field] = (object) $def;
}
$tableCache[$myTableName] = $temp;
} elseif (is_object($tableFields) || is_bool($tableFields)) {
$tableCache[$myTableName] = $tableFields;
}
}
}
self::$tableFieldCache = $tableCache;
} else {
self::$tableFieldCache = array();
}
}
}
if (!$tableName) {
$tableName = $this->_tbl;
}
// Try to load again column specifications if the table is not loaded OR if it's loaded and
// the previous call returned an error
if (!array_key_exists($tableName, self::$tableFieldCache) || isset(self::$tableFieldCache[$tableName]) && !self::$tableFieldCache[$tableName]) {
// Lookup the fields for this table only once.
$name = $tableName;
$prefix = $this->_db->getPrefix();
if (substr($name, 0, 3) == '#__') {
$checkName = $prefix . substr($name, 3);
} else {
$checkName = $name;
}
if (!in_array($checkName, self::$tableCache)) {
// The table doesn't exist. Return false.
self::$tableFieldCache[$tableName] = false;
} elseif (version_compare(JVERSION, '3.0', 'ge')) {
$fields = $this->_db->getTableColumns($name, false);
if (empty($fields)) {
$fields = false;
}
self::$tableFieldCache[$tableName] = $fields;
} else {
$fields = $this->_db->getTableFields($name, false);
if (!isset($fields[$name])) {
$fields = false;
}
self::$tableFieldCache[$tableName] = $fields[$name];
}
// PostgreSQL date type compatibility
if ($this->_db->name == 'postgresql' && self::$tableFieldCache[$tableName] != false) {
foreach (self::$tableFieldCache[$tableName] as $field) {
if (strtolower($field->type) == 'timestamp without time zone') {
if (stristr($field->Default, '\'::timestamp without time zone')) {
list($date, $junk) = explode('::', $field->Default, 2);
$field->Default = trim($date, "'");
}
}
}
}
// Save the data for this table into the cache
if ($useCache) {
$cacheData = FOFPlatform::getInstance()->setCache('tablefields', json_encode(self::$tableFieldCache));
}
}
return self::$tableFieldCache[$tableName];
}