silverstripe-sqlite3/code/SQLite3Database.php

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2010-01-14 21:42:43 +01:00
<?php
/**
* SQLite connector class.
* @package SQLite3
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*/
class SQLite3Database extends SS_Database {
/**
* Connection to the DBMS.
* @var object
*/
protected $dbConn;
/**
* True if we are connected to a database.
* @var boolean
*/
protected $active;
/**
* The name of the database.
* @var string
*/
protected $database;
/*
* This holds the name of the original database
* So if you switch to another for unit tests, you
* can then switch back in order to drop the temp database
*/
protected $database_original;
/*
* This holds the parameters that the original connection was created with,
* so we can switch back to it if necessary (used for unit tests)
*/
protected $parameters;
public static $default_pragma = array();
public static $vacuum = true;
/**
* Connect to a SQLite3 database.
* @param array $parameters An map of parameters, which should include:
* - database: The database to connect to
* - path: the path to the SQLite3 database file
* - key: the encryption key (needs testing)
* - memory: use the faster In-Memory database for unit tests
*/
public function __construct($parameters) {
//We will store these connection parameters for use elsewhere (ie, unit tests)
$this->parameters=$parameters;
$this->connectDatabase();
$this->database_original=$this->database;
}
/*
* Uses whatever connection details are in the $parameters array to connect to a database of a given name
*/
function connectDatabase() {
$this->enum_map = array();
$parameters = $this->parameters;
$dbName = !isset($this->database) ? $parameters['database'] : $this->database;
$file = $parameters['path'];
// assumes that the path to dbname will always be provided
// this is only necessary if we're using a filesystem path, and not an in-memory database
if($file != ':memory:') {
$file = $parameters['path'] . '/' . $dbName;
if(!file_exists($parameters['path'])) {
SQLiteDatabaseConfigurationHelper::create_db_dir($parameters['path']);
SQLiteDatabaseConfigurationHelper::secure_db_dir($parameters['path']);
}
}
$this->dbConn = new SQLite3($file, SQLITE3_OPEN_READWRITE | SQLITE3_OPEN_CREATE, $parameters['key']);
if(method_exists('SQLite3', 'busyTimeout')) $this->dbConn->busyTimeout(60000);
$this->active = true;
$this->database = $dbName;
if(!$this->dbConn) {
$this->databaseError("Couldn't connect to SQLite3 database");
return false;
}
foreach(self::$default_pragma as $pragma => $value) $this->pragma($pragma, $value);
if(empty(self::$default_pragma['locking_mode'])) {
self::$default_pragma['locking_mode'] = $this->pragma('locking_mode');
}
return true;
}
/**
* Not implemented, needed for PDO
*/
public function getConnect($parameters) {
return null;
}
/**
* Returns true if this database supports collations
* TODO: get rid of this?
* @return boolean
*/
public function supportsCollations() {
return true;
}
public function supportsTimezoneOverride() {
return false;
}
/**
* Get the version of SQLite3.
* @return float
*/
public function getVersion() {
return $this->query("SELECT sqlite_version()")->value();
}
/**
* Execute PRAGMA commands.
* works as getter and setter for connection params
* @param String pragma name
* @param String optional value to set
* @return String the pragma value
*/
protected function pragma($pragma, $value = null) {
if(strlen($value)) {
$this->query("PRAGMA $pragma = $value");
} else {
$value = $this->query("PRAGMA $pragma")->value();
}
return $value;
}
/**
* Get the database server, namely SQLite3.
* @return string
*/
public function getDatabaseServer() {
return "SQLite3";
}
public function query($sql, $errorLevel = E_USER_ERROR) {
if(isset($_REQUEST['previewwrite']) && in_array(strtolower(substr($sql,0,strpos($sql,' '))), array('insert','update','delete','replace'))) {
Debug::message("Will execute: $sql");
return;
}
if(isset($_REQUEST['showqueries'])) {
$starttime = microtime(true);
}
@$handle = $this->dbConn->query($sql);
if(isset($_REQUEST['showqueries'])) {
$endtime = round(microtime(true) - $starttime,4);
Debug::message("\n$sql\n{$endtime}ms\n", false);
}
DB::$lastQuery=$handle;
if(!$handle) {
$this->databaseError("Couldn't run query: $sql | " . $this->dbConn->lastErrorMsg(), $errorLevel);
}
return new SQLite3Query($this, $handle);
}
public function getGeneratedID($table) {
return $this->dbConn->lastInsertRowID();
}
/**
* OBSOLETE: Get the ID for the next new record for the table.
*
* @var string $table The name od the table.
* @return int
*/
public function getNextID($table) {
user_error('getNextID is OBSOLETE (and will no longer work properly)', E_USER_WARNING);
$result = $this->query("SELECT MAX(ID)+1 FROM \"$table\"")->value();
return $result ? $result : 1;
}
public function isActive() {
return $this->active ? true : false;
}
/*
* This will create a database based on whatever is in the $this->database value
* So you need to have called $this->selectDatabase() first, or used the __construct method
*/
public function createDatabase() {
$this->dbConn = null;
$fullpath = $this->parameters['path'] . '/' . $this->database;
if(is_writable($fullpath)) unlink($fullpath);
$this->connectDatabase();
}
/**
* Drop the database that this object is currently connected to.
* Use with caution.
*/
public function dropDatabase() {
//First, we need to switch back to the original database so we can drop the current one
$this->dbConn = null;
$db_to_drop=$this->database;
$this->selectDatabase($this->database_original);
$this->connectDatabase();
$fullpath = $this->parameters['path'] . '/' . $db_to_drop;
if(is_writable($fullpath)) unlink($fullpath);
}
/**
* Returns the name of the currently selected database
*/
public function currentDatabase() {
return $this->database;
}
/**
* Switches to the given database.
* If the database doesn't exist, you should call createDatabase() after calling selectDatabase()
*/
public function selectDatabase($dbname) {
$this->database=$dbname;
$this->tableList = $this->fieldList = $this->indexList = null;
return true;
}
/**
* Returns true if the named database exists.
*/
public function databaseExists($name) {
$SQL_name=Convert::raw2sql($name);
$result=$this->query("PRAGMA database_list");
foreach($result as $db) if($db['name'] == 'main' && preg_match('/\/' . $name . '/', $db['file'])) return true;
if(file_exists($this->parameters['path'] . '/' . $name)) return true;
return false;
}
function beginSchemaUpdate() {
$this->pragma('locking_mode', 'EXCLUSIVE');
$this->checkAndRepairTable();
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// if($this->TableExists('SQLiteEnums')) $this->query("DELETE FROM SQLiteEnums");
$this->checkAndRepairTable();
parent::beginSchemaUpdate();
}
function endSchemaUpdate() {
parent::endSchemaUpdate();
$this->pragma('locking_mode', self::$default_pragma['locking_mode']);
}
public function clearTable($table) {
if($table != 'SQLiteEnums') $this->dbConn->query("DELETE FROM \"$table\"");
}
public function createTable($table, $fields = null, $indexes = null, $options = null, $advancedOptions = null) {
if(!isset($fields['ID'])) $fields['ID'] = $this->IdColumn();
$fieldSchemata = array();
if($fields) foreach($fields as $k => $v) {
$fieldSchemata[] = "\"$k\" $v";
}
$fieldSchemas = implode(",\n",$fieldSchemata);
// Switch to "CREATE TEMPORARY TABLE" for temporary tables
$temporary = empty($options['temporary']) ? "" : "TEMPORARY";
$this->query("CREATE $temporary TABLE \"$table\" (
$fieldSchemas
)");
if($indexes) {
foreach($indexes as $indexName => $indexDetails) {
$this->createIndex($table, $indexName, $indexDetails);
}
}
return $table;
}
/**
* Alter a table's schema.
* @param $table The name of the table to alter
* @param $newFields New fields, a map of field name => field schema
* @param $newIndexes New indexes, a map of index name => index type
* @param $alteredFields Updated fields, a map of field name => field schema
* @param $alteredIndexes Updated indexes, a map of index name => index type
*/
public function alterTable($tableName, $newFields = null, $newIndexes = null, $alteredFields = null, $alteredIndexes = null, $alteredOptions = null, $advancedOptions = null) {
if($newFields) foreach($newFields as $fieldName => $fieldSpec) $this->createField($tableName, $fieldName, $fieldSpec);
if($alteredFields) foreach($alteredFields as $fieldName => $fieldSpec) $this->alterField($tableName, $fieldName, $fieldSpec);
if($newIndexes) foreach($newIndexes as $indexName => $indexSpec) $this->createIndex($tableName, $indexName, $indexSpec);
if($alteredIndexes) foreach($alteredIndexes as $indexName => $indexSpec) $this->alterIndex($tableName, $indexName, $indexSpec);
}
public function renameTable($oldTableName, $newTableName) {
$this->query("ALTER TABLE \"$oldTableName\" RENAME TO \"$newTableName\"");
}
protected static $checked_and_repaired = false;
/**
* Repairs and reindexes the table. This might take a long time on a very large table.
* @var string $tableName The name of the table.
* @return boolean Return true if the table has integrity after the method is complete.
*/
public function checkAndRepairTable($tableName = null) {
$ok = true;
if(!SapphireTest::using_temp_db() && !self::$checked_and_repaired) {
$this->alterationMessage("Checking database integrity","repaired");
if($msgs = $this->query('PRAGMA integrity_check')) foreach($msgs as $msg) if($msg['integrity_check'] != 'ok') { Debug::show($msg['integrity_check']); $ok = false; }
if(self::$vacuum) {
$this->query('VACUUM', E_USER_NOTICE);
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if($this instanceof SQLitePDODatabase) {
$msg = $this->dbConn->errorInfo();
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$msg = isset($msg[2]) ? $msg[2] : 'no errors';
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} else {
$msg = $this->dbConn->lastErrorMsg();
}
if(preg_match('/authoriz/', $msg)) {
$this->alterationMessage('VACUUM | ' . $msg, "error");
} else {
$this->alterationMessage("VACUUMing", "repaired");
}
}
self::$checked_and_repaired = true;
}
return $ok;
}
public function createField($tableName, $fieldName, $fieldSpec) {
$this->query("ALTER TABLE \"$tableName\" ADD \"$fieldName\" $fieldSpec");
}
/**
* Change the database type of the given field.
* @param string $tableName The name of the tbale the field is in.
* @param string $fieldName The name of the field to change.
* @param string $fieldSpec The new field specification
*/
public function alterField($tableName, $fieldName, $fieldSpec) {
$oldFieldList = $this->fieldList($tableName);
$fieldNameList = '"' . implode('","', array_keys($oldFieldList)) . '"';
if(!empty($_REQUEST['avoidConflict']) && Director::isDev()) $fieldSpec = preg_replace('/\snot null\s/i', ' NOT NULL ON CONFLICT REPLACE ', $fieldSpec);
if(array_key_exists($fieldName, $oldFieldList)) {
$oldCols = array();
foreach($oldFieldList as $name => $spec) {
$newColsSpec[] = "\"$name\" " . ($name == $fieldName ? $fieldSpec : $spec);
}
$queries = array(
"BEGIN TRANSACTION",
"CREATE TABLE \"{$tableName}_alterfield_{$fieldName}\"(" . implode(',', $newColsSpec) . ")",
"INSERT INTO \"{$tableName}_alterfield_{$fieldName}\" SELECT {$fieldNameList} FROM \"$tableName\"",
"DROP TABLE \"$tableName\"",
"ALTER TABLE \"{$tableName}_alterfield_{$fieldName}\" RENAME TO \"$tableName\"",
"COMMIT"
);
$indexList = $this->indexList($tableName);
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foreach($queries as $query) $this->query($query.';');
foreach($indexList as $indexName => $indexSpec) $this->createIndex($tableName, $indexName, $indexSpec);
}
}
/**
* Change the database column name of the given field.
*
* @param string $tableName The name of the tbale the field is in.
* @param string $oldName The name of the field to change.
* @param string $newName The new name of the field
*/
public function renameField($tableName, $oldName, $newName) {
$oldFieldList = $this->fieldList($tableName);
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$oldCols = array();
if(array_key_exists($oldName, $oldFieldList)) {
foreach($oldFieldList as $name => $spec) {
$oldCols[] = "\"$name\"" . (($name == $oldName) ? " AS $newName" : '');
$newCols[] = "\"". (($name == $oldName) ? $newName : $name). "\"";
$newColsSpec[] = "\"" . (($name == $oldName) ? $newName : $name) . "\" $spec";
}
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// SQLite doesn't support direct renames through ALTER TABLE
$queries = array(
"BEGIN TRANSACTION",
"CREATE TABLE \"{$tableName}_renamefield_{$oldName}\" (" . implode(',', $newColsSpec) . ")",
"INSERT INTO \"{$tableName}_renamefield_{$oldName}\" SELECT " . implode(',', $oldCols) . " FROM \"$tableName\"",
"DROP TABLE \"$tableName\"",
"ALTER TABLE \"{$tableName}_renamefield_{$oldName}\" RENAME TO \"$tableName\"",
"COMMIT"
);
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// Remember original indexes
$oldIndexList = $this->indexList($tableName);
// Then alter the table column
foreach($queries as $query) $this->query($query.';');
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// Recreate the indexes
foreach($oldIndexList as $indexName => $indexSpec) {
$renamedIndexSpec = array();
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foreach(explode(',', $indexSpec) as $col) {
$col = trim($col, '"'); // remove quotes
$renamedIndexSpec[] = ($col == $oldName) ? $newName : $col;
}
$this->createIndex($tableName, $indexName, implode(',', $renamedIndexSpec));
}
}
}
public function fieldList($table) {
$sqlCreate = DB::query('SELECT sql FROM sqlite_master WHERE type = "table" AND name = "' . $table . '"')->record();
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$fieldList = array();
if($sqlCreate && $sqlCreate['sql']) {
preg_match('/^[\s]*CREATE[\s]+TABLE[\s]+[\'"]?[a-zA-Z0-9_\\\]+[\'"]?[\s]*\((.+)\)[\s]*$/ims', $sqlCreate['sql'], $matches);
$fields = isset($matches[1]) ? preg_split('/,(?=(?:[^\'"]*$)|(?:[^\'"]*[\'"][^\'"]*[\'"][^\'"]*)*$)/x', $matches[1]) : array();
foreach($fields as $field) {
$details = preg_split('/\s/', trim($field));
$name = array_shift($details);
$name = str_replace('"', '', trim($name));
$fieldList[$name] = implode(' ', $details);
}
}
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return $fieldList;
}
/**
* Create an index on a table.
* @param string $tableName The name of the table.
* @param string $indexName The name of the index.
* @param string $indexSpec The specification of the index, see Database::requireIndex() for more details.
*/
public function createIndex($tableName, $indexName, $indexSpec) {
$spec = $this->convertIndexSpec($indexSpec, $indexName);
if(!preg_match('/".+"/', $indexName)) $indexName = "\"$indexName\"";
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$this->query("CREATE INDEX IF NOT EXISTS $indexName ON \"$tableName\" ($spec)");
}
/*
* This takes the index spec which has been provided by a class (ie static $indexes = blah blah)
* and turns it into a proper string.
* Some indexes may be arrays, such as fulltext and unique indexes, and this allows database-specific
* arrays to be created.
*/
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public function convertIndexSpec($indexSpec, $indexName = null) {
if(is_array($indexSpec)) {
$indexSpec = $indexSpec['value'];
} else if(is_numeric($indexSpec)) {
$indexSpec = $indexName;
}
if(preg_match('/\((.+)\)/', $indexSpec, $matches)) {
$indexSpec = $matches[1];
}
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return preg_replace('/\s/', '', $indexSpec);
}
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/**
* prefix indexname with uppercase tablename if not yet done, in order to avoid ambiguity
*/
function getDbSqlDefinition($tableName, $indexName, $indexSpec) {
return "\"$tableName.$indexName\"";
}
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/**
* Alter an index on a table.
* @param string $tableName The name of the table.
* @param string $indexName The name of the index.
* @param string $indexSpec The specification of the index, see Database::requireIndex() for more details.
*/
public function alterIndex($tableName, $indexName, $indexSpec) {
$this->createIndex($tableName, $indexName, $indexSpec);
}
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/**
* Return the list of indexes in a table.
* @param string $table The table name.
* @return array
*/
public function indexList($table) {
$indexList = array();
foreach(DB::query('PRAGMA index_list("' . $table . '")') as $index) {
$list = array();
foreach(DB::query('PRAGMA index_info("' . $index["name"] . '")') as $details) $list[] = $details['name'];
$indexList[$index["name"]] = implode(',', $list);
}
foreach($indexList as $name => $val) {
// Normalize quoting to avoid false positives when checking for index changes
// during schema generation
$valParts = preg_split('/\s*,\s*/', $val);
foreach($valParts as $i => $valPart) {
$valParts[$i] = preg_replace('/^"?(.*)"?$/', '$1', $valPart);
}
$indexList[$name] = '"' . implode('","', $valParts) . '"';
}
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return $indexList;
}
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/**
* Returns a list of all the tables in the database.
* Table names will all be in lowercase.
* @return array
*/
public function tableList() {
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$tables = array();
foreach($this->query('SELECT name FROM sqlite_master WHERE type = "table"') as $record) {
//$table = strtolower(reset($record));
$table = reset($record);
$tables[strtolower($table)] = $table;
}
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//Return an empty array if there's nothing in this database
return isset($tables) ? $tables : Array();
}
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function TableExists($tableName){
$result=$this->query('SELECT name FROM sqlite_master WHERE type = "table" AND name="' . $tableName . '"')->first();
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if($result)
return true;
else
return false;
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}
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/**
* Return the number of rows affected by the previous operation.
* @return int
*/
public function affectedRows() {
return $this->dbConn->changes();
}
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/**
* Return a boolean type-formatted string
*
* @params array $values Contains a tokenised list of info about this data type
* @return string
*/
public function boolean($values){
return 'BOOL NOT NULL DEFAULT ' . (isset($values['default']) ? (int)$values['default'] : 0);
}
/**
* Return a date type-formatted string
*
* @params array $values Contains a tokenised list of info about this data type
* @return string
*/
public function date($values){
return "TEXT";
}
/**
* Return a decimal type-formatted string
*
* @params array $values Contains a tokenised list of info about this data type
* @return string
*/
public function decimal($values, $asDbValue=false){
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$default = isset($values['default']) && is_numeric($values['default']) ? $values['default'] : 0;
return "NUMERIC NOT NULL DEFAULT " . $default;
}
/**
* Return a enum type-formatted string
*
* enumus are not supported. as a workaround to store allowed values we creates an additional table
*
* @params array $values Contains a tokenised list of info about this data type
* @return string
*/
protected $enum_map = array();
public function enum($values){
$tablefield = $values['table'] . '.' . $values['name'];
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if(empty($this->enum_map)) $this->query("CREATE TABLE IF NOT EXISTS \"SQLiteEnums\" (\"TableColumn\" TEXT PRIMARY KEY, \"EnumList\" TEXT)");
if(empty($this->enum_map[$tablefield]) || $this->enum_map[$tablefield] != implode(',', $values['enums'])) {
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$this->query("REPLACE INTO SQLiteEnums (TableColumn, EnumList) VALUES (\"{$tablefield}\", \"" . implode(',', $values['enums']) . "\")");
$this->enum_map[$tablefield] = implode(',', $values['enums']);
}
return "TEXT DEFAULT '{$values['default']}'";
}
/**
* Return a set type-formatted string
* This type doesn't exist in SQLite as well
*
* @params array $values Contains a tokenised list of info about this data type
* @return string
*/
public function set($values) {
$tablefield = $values['table'] . '.' . $values['name'];
if(empty($this->enum_map)) $this->query("CREATE TABLE IF NOT EXISTS SQLiteEnums (TableColumn TEXT PRIMARY KEY, EnumList TEXT)");
if(empty($this->enum_map[$tablefield]) || $this->enum_map[$tablefield] != implode(',', $values['enums'])) {
$this->query("REPLACE INTO SQLiteEnums (TableColumn, EnumList) VALUES (\"{$tablefield}\", \"" . implode(',', $values['enums']) . "\")");
$this->enum_map[$tablefield] = implode(',', $values['enums']);
}
$default = '';
if(!empty($values['default'])) {
$default = str_replace(array('"',"'","\\","\0"), "", $values['default']);
$default = " DEFAULT '$default'";
}
return 'TEXT' . $default;
}
/**
* Return a float type-formatted string
*
* @params array $values Contains a tokenised list of info about this data type
* @return string
*/
public function float($values, $asDbValue=false){
return "REAL";
}
/**
* Return a Double type-formatted string
*
* @params array $values Contains a tokenised list of info about this data type
* @return string
*/
public function Double($values, $asDbValue=false){
return "REAL";
}
/**
* Return a int type-formatted string
*
* @params array $values Contains a tokenised list of info about this data type
* @return string
*/
public function int($values, $asDbValue=false){
return "INTEGER({$values['precision']}) " . strtoupper($values['null']) . " DEFAULT " . (int)$values['default'];
}
/**
* Return a datetime type-formatted string
* For SQLite3, we simply return the word 'TEXT', no other parameters are necessary
*
* @params array $values Contains a tokenised list of info about this data type
* @return string
*/
public function ss_datetime($values, $asDbValue=false){
return "DATETIME";
}
/**
* Return a text type-formatted string
*
* @params array $values Contains a tokenised list of info about this data type
* @return string
*/
public function text($values, $asDbValue=false){
return 'TEXT';
}
/**
* Return a time type-formatted string
*
* @params array $values Contains a tokenised list of info about this data type
* @return string
*/
public function time($values){
return "TEXT";
}
/**
* Return a varchar type-formatted string
*
* @params array $values Contains a tokenised list of info about this data type
* @return string
*/
public function varchar($values, $asDbValue=false){
return "VARCHAR({$values['precision']}) COLLATE NOCASE";
}
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/*
* Return a 4 digit numeric type. MySQL has a proprietary 'Year' type.
* For SQLite3 we use TEXT
*/
public function year($values, $asDbValue=false){
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return "TEXT";
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}
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function escape_character($escape=false){
if($escape) return "\\\""; else return "\"";
}
/**
* This returns the column which is the primary key for each table
* In SQLite3 it is INTEGER PRIMARY KEY AUTOINCREMENT
* SQLite3 does autoincrement ids even without the AUTOINCREMENT keyword, but the behaviour is signifficantly different
*
* @return string
*/
function IdColumn($asDbValue=false){
return 'INTEGER PRIMARY KEY AUTOINCREMENT';
}
/**
* Returns true if this table exists
*/
function hasTable($tableName) {
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$SQL_table = Convert::raw2sql($tableName);
return (bool)($this->query("SELECT name FROM sqlite_master WHERE type = \"table\" AND name = \"$tableName\"")->value());
}
/**
* Returns the SQL command to get all the tables in this database
*/
function allTablesSQL(){
return 'SELECT name FROM sqlite_master WHERE type = "table"';
}
/**
* Return enum values for the given field
* @return array
*/
public function enumValuesForField($tableName, $fieldName) {
$classnameinfo = DB::query("SELECT EnumList FROM SQLiteEnums WHERE TableColumn = \"{$tableName}.{$fieldName}\"")->first();
$output = array();
if($classnameinfo) {
$output = explode(',', $classnameinfo['EnumList']);
}
return $output;
}
/**
* Get the actual enum fields from the constraint value:
*/
protected function EnumValuesFromConstraint($constraint){
$constraint=substr($constraint, strpos($constraint, 'ANY (ARRAY[')+11);
$constraint=substr($constraint, 0, -11);
$constraints=Array();
$segments=explode(',', $constraint);
foreach($segments as $this_segment){
$bits=preg_split('/ *:: */', $this_segment);
array_unshift($constraints, trim($bits[0], " '"));
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}
return $constraints;
}
/*
* Returns the database-specific version of the now() function
*/
function now(){
return "datetime('now', 'localtime')";
}
/*
* Returns the database-specific version of the random() function
*/
function random(){
return 'random()';
}
/*
* This is a lookup table for data types.
* For instance, Postgres uses 'INT', while MySQL uses 'UNSIGNED'
* So this is a DB-specific list of equivalents.
*/
function dbDataType($type){
$values=Array(
'unsigned integer'=>'INT'
);
if(isset($values[$type]))
return $values[$type];
else return '';
}
/*
* This will return text which has been escaped in a database-friendly manner
*/
function addslashes($value){
return $this->dbConn->escapeString($value);
}
/*
* This changes the index name depending on database requirements.
*/
function modifyIndex($index, $spec){
return str_replace('"', '', $index);
}
/**
* The core search engine configuration.
* @todo There is a fulltext search for SQLite making use of virtual tables, the fts3 extension and the MATCH operator
* there are a few issues with fts:
* - shared cached lock doesn't allow to create virtual tables on versions prior to 3.6.17
* - there must not be more than one MATCH operator per statement
* - the fts3 extension needs to be available
* for now we use the MySQL implementation with the MATCH()AGAINST() uglily replaced with LIKE
*
* @param string $keywords Keywords as a space separated string
* @return object DataObjectSet of result pages
*/
public function searchEngine($classesToSearch, $keywords, $start, $pageLength, $sortBy = "Relevance DESC", $extraFilter = "", $booleanSearch = false, $alternativeFileFilter = "", $invertedMatch = false) {
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$fileFilter = '';
$keywords = Convert::raw2sql(str_replace(array('*','+','-','"','\''),'',$keywords));
$htmlEntityKeywords = htmlentities(utf8_decode($keywords));
$extraFilters = array('SiteTree' => '', 'File' => '');
if($extraFilter) {
$extraFilters['SiteTree'] = " AND $extraFilter";
if($alternativeFileFilter) $extraFilters['File'] = " AND $alternativeFileFilter";
else $extraFilters['File'] = $extraFilters['SiteTree'];
}
// Always ensure that only pages with ShowInSearch = 1 can be searched
$extraFilters['SiteTree'] .= ' AND ShowInSearch <> 0';
// File.ShowInSearch was added later, keep the database driver backwards compatible
// by checking for its existence first
$fields = $this->fieldList('File');
if(array_key_exists('ShowInSearch', $fields)) {
$extraFilters['File'] .= " AND ShowInSearch <> 0";
}
$limit = $start . ", " . (int) $pageLength;
$notMatch = $invertedMatch ? "NOT " : "";
if($keywords) {
$match['SiteTree'] = "
(Title LIKE '%$keywords%' OR MenuTitle LIKE '%$keywords%' OR Content LIKE '%$keywords%' OR MetaDescription LIKE '%$keywords%' OR
Title LIKE '%$htmlEntityKeywords%' OR MenuTitle LIKE '%$htmlEntityKeywords%' OR Content LIKE '%$htmlEntityKeywords%' OR MetaDescription LIKE '%$htmlEntityKeywords%')
";
$match['File'] = "(Filename LIKE '%$keywords%' OR Title LIKE '%$keywords%' OR Content LIKE '%$keywords%') AND ClassName = 'File'";
// We make the relevance search by converting a boolean mode search into a normal one
$relevanceKeywords = $keywords;
$htmlEntityRelevanceKeywords = $htmlEntityKeywords;
$relevance['SiteTree'] = "(Title LIKE '%$relevanceKeywords%' OR MenuTitle LIKE '%$relevanceKeywords%' OR Content LIKE '%$relevanceKeywords%' OR MetaDescription LIKE '%$relevanceKeywords%') + (Title LIKE '%$htmlEntityRelevanceKeywords%' OR MenuTitle LIKE '%$htmlEntityRelevanceKeywords%' OR Content LIKE '%$htmlEntityRelevanceKeywords%' OR MetaDescription LIKE '%$htmlEntityRelevanceKeywords%')";
$relevance['File'] = "(Filename LIKE '%$relevanceKeywords%' OR Title LIKE '%$relevanceKeywords%' OR Content LIKE '%$relevanceKeywords%')";
} else {
$relevance['SiteTree'] = $relevance['File'] = 1;
$match['SiteTree'] = $match['File'] = "1 = 1";
}
// Generate initial queries and base table names
$baseClasses = array('SiteTree' => '', 'File' => '');
$queries = array();
foreach($classesToSearch as $class) {
$queries[$class] = DataList::create($class)->where($notMatch . $match[$class] . $extraFilters[$class], "")->dataQuery()->query();
$fromArr = $queries[$class]->getFrom();
$baseClasses[$class] = reset($fromArr);
}
// Make column selection lists
$select = array(
'SiteTree' => array(
"\"ClassName\"",
"\"ID\"",
"\"ParentID\"",
"\"Title\"",
"\"URLSegment\"",
"\"Content\"",
"\"LastEdited\"",
"\"Created\"",
"NULL AS \"Filename\"",
"NULL AS \"Name\"",
"\"CanViewType\"",
"$relevance[SiteTree] AS Relevance"
),
'File' => array(
"\"ClassName\"",
"\"ID\"",
"NULL AS \"ParentID\"",
"\"Title\"",
"NULL AS \"URLSegment\"",
"\"Content\"",
"\"LastEdited\"",
"\"Created\"",
"\"Filename\"",
"\"Name\"",
"NULL AS \"CanViewType\"",
"$relevance[File] AS Relevance"
)
);
// Process queries
foreach($classesToSearch as $class) {
// There's no need to do all that joining
$queries[$class]->setFrom($baseClasses[$class]);
$queries[$class]->setSelect(array());
foreach($select[$class] as $clause) {
if(preg_match('/^(.*) +AS +"?([^"]*)"?/i', $clause, $matches)) {
$queries[$class]->selectField($matches[1], $matches[2]);
} else {
$queries[$class]->selectField(str_replace('"', '', $clause));
}
}
$queries[$class]->setOrderBy(array());
}
// Combine queries
$querySQLs = array();
$totalCount = 0;
foreach($queries as $query) {
$querySQLs[] = $query->sql();
$totalCount += $query->unlimitedRowCount();
}
$fullQuery = implode(" UNION ", $querySQLs) . " ORDER BY $sortBy LIMIT $limit";
// Get records
$records = DB::query($fullQuery);
foreach($records as $record) {
$objects[] = new $record['ClassName']($record);
}
if(isset($objects)) $doSet = new ArrayList($objects);
else $doSet = new ArrayList();
$list = new PaginatedList($doSet);
$list->setPageStart($start);
$list->setPageLEngth($pageLength);
$list->setTotalItems($totalCount);
return $list;
}
/*
* Does this database support transactions?
*/
public function supportsTransactions(){
return version_compare($this->getVersion(), '3.6', '>=');
}
/*
* This is a quick lookup to discover if the database supports particular extensions
*/
public function supportsExtensions($extensions=Array('partitions', 'tablespaces', 'clustering')){
if(isset($extensions['partitions']))
return true;
elseif(isset($extensions['tablespaces']))
return true;
elseif(isset($extensions['clustering']))
return true;
else
return false;
}
/**
* @deprecated 1.2 use transactionStart() (method required for 2.4.x)
*/
public function startTransaction($transaction_mode=false, $session_characteristics=false){
$this->transactionStart($transaction_mode, $session_characteristics);
}
/*
* Start a prepared transaction
*/
public function transactionStart($transaction_mode=false, $session_characteristics=false){
DB::query('BEGIN');
}
/*
* Create a savepoint that you can jump back to if you encounter problems
*/
public function transactionSavepoint($savepoint){
DB::query("SAVEPOINT \"$savepoint\"");
}
/*
* Rollback or revert to a savepoint if your queries encounter problems
* If you encounter a problem at any point during a transaction, you may
* need to rollback that particular query, or return to a savepoint
*/
public function transactionRollback($savepoint=false){
if($savepoint) {
DB::query("ROLLBACK TO $savepoint;");
} else {
DB::query('ROLLBACK;');
}
}
/**
* @deprecated 1.2 use transactionEnd() (method required for 2.4.x)
*/
public function endTransaction(){
$this->transactionEnd();
}
/*
* Commit everything inside this transaction so far
*/
public function transactionEnd(){
DB::query('COMMIT;');
}
/**
*
* This is a stub function. Postgres caches the fieldlist results.
*
* @param string $tableName
*
* @return boolean
*/
function clear_cached_fieldlist($tableName=false){
return true;
}
/**
* Generate a WHERE clause for text matching.
*
* @param String $field Quoted field name
* @param String $value Escaped search. Can include percentage wildcards.
* @param boolean $exact Exact matches or wildcard support.
* @param boolean $negate Negate the clause.
* @param boolean $caseSensitive Enforce case sensitivity if TRUE or FALSE.
* Stick with default collation if set to NULL.
* @return String SQL
*/
public function comparisonClause($field, $value, $exact = false, $negate = false, $caseSensitive = null) {
if($exact && !$caseSensitive) {
$comp = ($negate) ? '!=' : '=';
} else {
if($caseSensitive) {
// GLOB uses asterisks as wildcards.
// Replace them in search string, without replacing escaped percetage signs.
$comp = 'GLOB';
$value = preg_replace('/^%([^\\\\])/', '*$1', $value);
$value = preg_replace('/([^\\\\])%$/', '$1*', $value);
$value = preg_replace('/([^\\\\])%/', '$1*', $value);
} else {
$comp = 'LIKE';
}
if($negate) $comp = 'NOT ' . $comp;
}
return sprintf("%s %s '%s'", $field, $comp, $value);
}
/**
* Function to return an SQL datetime expression that can be used with SQLite3
* used for querying a datetime in a certain format
* @param string $date to be formated, can be either 'now', literal datetime like '1973-10-14 10:30:00' or field name, e.g. '"SiteTree"."Created"'
* @param string $format to be used, supported specifiers:
* %Y = Year (four digits)
* %m = Month (01..12)
* %d = Day (01..31)
* %H = Hour (00..23)
* %i = Minutes (00..59)
* %s = Seconds (00..59)
* %U = unix timestamp, can only be used on it's own
* @return string SQL datetime expression to query for a formatted datetime
*/
function formattedDatetimeClause($date, $format) {
preg_match_all('/%(.)/', $format, $matches);
foreach($matches[1] as $match) if(array_search($match, array('Y','m','d','H','i','s','U')) === false) user_error('formattedDatetimeClause(): unsupported format character %' . $match, E_USER_WARNING);
$translate = array(
'/%i/' => '%M',
'/%s/' => '%S',
'/%U/' => '%s',
);
$format = preg_replace(array_keys($translate), array_values($translate), $format);
$modifiers = array();
if($format == '%s' && $date != 'now') $modifiers[] = 'utc';
if($format != '%s' && $date == 'now') $modifiers[] = 'localtime';
if(preg_match('/^now$/i', $date)) {
$date = "'now'";
} else if(preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/i', $date)) {
$date = "'$date'";
}
$modifier = empty($modifiers) ? '' : ", '" . implode("', '", $modifiers) . "'";
return "strftime('$format', $date$modifier)";
}
/**
* Function to return an SQL datetime expression that can be used with SQLite3
* used for querying a datetime addition
* @param string $date, can be either 'now', literal datetime like '1973-10-14 10:30:00' or field name, e.g. '"SiteTree"."Created"'
* @param string $interval to be added, use the format [sign][integer] [qualifier], e.g. -1 Day, +15 minutes, +1 YEAR
* supported qualifiers:
* - years
* - months
* - days
* - hours
* - minutes
* - seconds
* This includes the singular forms as well
* @return string SQL datetime expression to query for a datetime (YYYY-MM-DD hh:mm:ss) which is the result of the addition
*/
function datetimeIntervalClause($date, $interval) {
$modifiers = array();
if($date == 'now') $modifiers[] = 'localtime';
if(preg_match('/^now$/i', $date)) {
$date = "'now'";
} else if(preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/i', $date)) {
$date = "'$date'";
}
$modifier = empty($modifiers) ? '' : ", '" . implode("', '", $modifiers) . "'";
return "datetime($date$modifier, '$interval')";
}
/**
* Function to return an SQL datetime expression that can be used with SQLite3
* used for querying a datetime substraction
* @param string $date1, can be either 'now', literal datetime like '1973-10-14 10:30:00' or field name, e.g. '"SiteTree"."Created"'
* @param string $date2 to be substracted of $date1, can be either 'now', literal datetime like '1973-10-14 10:30:00' or field name, e.g. '"SiteTree"."Created"'
* @return string SQL datetime expression to query for the interval between $date1 and $date2 in seconds which is the result of the substraction
*/
function datetimeDifferenceClause($date1, $date2) {
$modifiers1 = array();
$modifiers2 = array();
if($date1 == 'now') $modifiers1[] = 'localtime';
if($date2 == 'now') $modifiers2[] = 'localtime';
if(preg_match('/^now$/i', $date1)) {
$date1 = "'now'";
} else if(preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/i', $date1)) {
$date1 = "'$date1'";
}
if(preg_match('/^now$/i', $date2)) {
$date2 = "'now'";
} else if(preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/i', $date2)) {
$date2 = "'$date2'";
}
$modifier1 = empty($modifiers1) ? '' : ", '" . implode("', '", $modifiers1) . "'";
$modifier2 = empty($modifiers2) ? '' : ", '" . implode("', '", $modifiers2) . "'";
return "strftime('%s', $date1$modifier1) - strftime('%s', $date2$modifier2)";
}
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}
/**
* A result-set from a SQLite3 database.
* @package SQLite3Database
*/
class SQLite3Query extends SS_Query {
/**
* The SQLite3Database object that created this result set.
* @var SQLite3Database
*/
protected $database;
/**
* The internal sqlite3 handle that points to the result set.
* @var resource
*/
protected $handle;
/**
* Hook the result-set given into a Query class, suitable for use by framework.
* @param database The database object that created this query.
* @param handle the internal sqlite3 handle that is points to the resultset.
*/
public function __construct(SQLite3Database $database, $handle) {
$this->database = $database;
$this->handle = $handle;
}
public function __destruct() {
if($this->handle) $this->handle->finalize();
}
public function seek($row) {
$this->handle->reset();
$i=0;
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while($i < $row && $row = @$this->handle->fetchArray()) $i++;
return true;
}
/**
* @todo This looks terrible but there is no SQLite3::get_num_rows() implementation
*/
public function numRecords() {
$c=0;
while($this->handle->fetchArray()) $c++;
$this->handle->reset();
return $c;
}
public function nextRecord() {
if($data = $this->handle->fetchArray(SQLITE3_ASSOC)) {
return $data;
} else {
return false;
}
}
}