/**
* Builds the XML structure to export.
*
* @return array An array of XML lines (strings).
*
* @since 11.1
* @throws Exception if an error occurs.
*/
protected function buildXmlStructure()
{
$buffer = array();
foreach ($this->from as $table) {
// Replace the magic prefix if found.
$table = $this->getGenericTableName($table);
// Get the details columns information.
$fields = $this->db->getTableColumns($table);
$keys = $this->db->getTableKeys($table);
$buffer[] = ' <table_structure name="' . $table . '">';
foreach ($fields as $field) {
$buffer[] = ' <field Field="' . $field->Field . '"' . ' Type="' . $field->Type . '"' . ' Null="' . $field->Null . '"' . ' Key="' . $field->Key . '"' . (isset($field->Default) ? ' Default="' . $field->Default . '"' : '') . ' Extra="' . $field->Extra . '"' . ' />';
}
foreach ($keys as $key) {
$buffer[] = ' <key Table="' . $table . '"' . ' Non_unique="' . $key->Non_unique . '"' . ' Key_name="' . $key->Key_name . '"' . ' Seq_in_index="' . $key->Seq_in_index . '"' . ' Column_name="' . $key->Column_name . '"' . ' Collation="' . $key->Collation . '"' . ' Null="' . $key->Null . '"' . ' Index_type="' . $key->Index_type . '"' . ' Comment="' . htmlspecialchars($key->Comment) . '"' . ' />';
}
$buffer[] = ' </table_structure>';
}
return $buffer;
}
/**
* Get alters for table if there is a difference.
*
* @param SimpleXMLElement $structure The XML table definition.
*
* @return array
*
* @since 11.1
*/
protected function getAlterTableSQL(SimpleXMLElement $structure)
{
// Initialise variables.
$table = $this->getRealTableName($structure['name']);
$oldFields = $this->db->getTableColumns($table);
$oldKeys = $this->db->getTableKeys($table);
$alters = array();
// Get the fields and keys from the XML that we are aiming for.
$newFields = $structure->xpath('field');
$newKeys = $structure->xpath('key');
// Loop through each field in the new structure.
foreach ($newFields as $field) {
$fName = (string) $field['Field'];
if (isset($oldFields[$fName])) {
// The field exists, check it's the same.
$column = $oldFields[$fName];
// Test whether there is a change.
$change = (string) $field['Type'] != $column->Type || (string) $field['Null'] != $column->Null || (string) $field['Default'] != $column->Default || (string) $field['Extra'] != $column->Extra;
if ($change) {
$alters[] = $this->getChangeColumnSQL($table, $field);
}
// Unset this field so that what we have left are fields that need to be removed.
unset($oldFields[$fName]);
} else {
// The field is new.
$alters[] = $this->getAddColumnSQL($table, $field);
}
}
// Any columns left are orphans
foreach ($oldFields as $name => $column) {
// Delete the column.
$alters[] = $this->getDropColumnSQL($table, $name);
}
// Get the lookups for the old and new keys.
$oldLookup = $this->getKeyLookup($oldKeys);
$newLookup = $this->getKeyLookup($newKeys);
// Loop through each key in the new structure.
foreach ($newLookup as $name => $keys) {
// Check if there are keys on this field in the existing table.
if (isset($oldLookup[$name])) {
$same = true;
$newCount = count($newLookup[$name]);
$oldCount = count($oldLookup[$name]);
// There is a key on this field in the old and new tables. Are they the same?
if ($newCount == $oldCount) {
// Need to loop through each key and do a fine grained check.
for ($i = 0; $i < $newCount; $i++) {
$same = (string) $newLookup[$name][$i]['Non_unique'] == $oldLookup[$name][$i]->Non_unique && (string) $newLookup[$name][$i]['Column_name'] == $oldLookup[$name][$i]->Column_name && (string) $newLookup[$name][$i]['Seq_in_index'] == $oldLookup[$name][$i]->Seq_in_index && (string) $newLookup[$name][$i]['Collation'] == $oldLookup[$name][$i]->Collation && (string) $newLookup[$name][$i]['Index_type'] == $oldLookup[$name][$i]->Index_type;
// Debug.
// echo '<pre>';
// echo '<br />Non_unique: '.
// ((string) $newLookup[$name][$i]['Non_unique'] == $oldLookup[$name][$i]->Non_unique ? 'Pass' : 'Fail').' '.
// (string) $newLookup[$name][$i]['Non_unique'].' vs '.$oldLookup[$name][$i]->Non_unique;
// echo '<br />Column_name: '.
// ((string) $newLookup[$name][$i]['Column_name'] == $oldLookup[$name][$i]->Column_name ? 'Pass' : 'Fail').' '.
// (string) $newLookup[$name][$i]['Column_name'].' vs '.$oldLookup[$name][$i]->Column_name;
// echo '<br />Seq_in_index: '.
// ((string) $newLookup[$name][$i]['Seq_in_index'] == $oldLookup[$name][$i]->Seq_in_index ? 'Pass' : 'Fail').' '.
// (string) $newLookup[$name][$i]['Seq_in_index'].' vs '.$oldLookup[$name][$i]->Seq_in_index;
// echo '<br />Collation: '.
// ((string) $newLookup[$name][$i]['Collation'] == $oldLookup[$name][$i]->Collation ? 'Pass' : 'Fail').' '.
// (string) $newLookup[$name][$i]['Collation'].' vs '.$oldLookup[$name][$i]->Collation;
// echo '<br />Index_type: '.
// ((string) $newLookup[$name][$i]['Index_type'] == $oldLookup[$name][$i]->Index_type ? 'Pass' : 'Fail').' '.
// (string) $newLookup[$name][$i]['Index_type'].' vs '.$oldLookup[$name][$i]->Index_type;
// echo '<br />Same = '.($same ? 'true' : 'false');
// echo '</pre>';
if (!$same) {
// Break out of the loop. No need to check further.
break;
}
}
} else {
// Count is different, just drop and add.
$same = false;
}
if (!$same) {
$alters[] = $this->getDropKeySQL($table, $name);
$alters[] = $this->getAddKeySQL($table, $keys);
}
// Unset this field so that what we have left are fields that need to be removed.
unset($oldLookup[$name]);
} else {
// This is a new key.
$alters[] = $this->getAddKeySQL($table, $keys);
}
}
// Any keys left are orphans.
foreach ($oldLookup as $name => $keys) {
if (strtoupper($name) == 'PRIMARY') {
$alters[] = $this->getDropPrimaryKeySQL($table);
} else {
$alters[] = $this->getDropKeySQL($table, $name);
}
}
return $alters;
}
/**
* Tests the JDatabaseMySQLi getTableKeys method.
*
* @return void
*
* @since 11.4
*/
public function testGetTableKeys()
{
$this->assertThat($this->object->getTableKeys('#__dbtest'), $this->isType('array'), 'The list of keys for the table is returned in an array.');
}