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5326ce6bca
This was previously only possible for the base table and in case one wanted to use table aliases in the query column definition for non-base tables as well, it did not work well due to not being explicitly supported. Now, to use such table aliases one must initialize DbRepository::tableAliases. refs #8826
835 lines
26 KiB
PHP
835 lines
26 KiB
PHP
<?php
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/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
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namespace Icinga\Repository;
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use DateTime;
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use Icinga\Application\Logger;
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use Icinga\Data\Filter\Filter;
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use Icinga\Data\Selectable;
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use Icinga\Exception\ProgrammingError;
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use Icinga\Exception\QueryException;
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use Icinga\Exception\StatementException;
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use Icinga\Util\String;
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/**
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* Abstract base class for concrete repository implementations
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*
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* To utilize this class and its features, the following is required:
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* <ul>
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* <li>Concrete implementations need to initialize Repository::$queryColumns</li>
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* <li>The datasource passed to a repository must implement the Selectable interface</li>
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* <li>The datasource must yield an instance of Queryable when its select() method is called</li>
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* </ul>
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*/
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abstract class Repository implements Selectable
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{
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/**
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* The format to use when converting values of type date_time
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*/
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const DATETIME_FORMAT = 'd/m/Y g:i A';
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/**
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* The name of this repository
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*
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* @var string
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*/
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protected $name;
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/**
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* The datasource being used
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*
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* @var Selectable
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*/
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protected $ds;
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/**
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* The base table name this repository is responsible for
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*
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* This will be automatically set to the first key of $queryColumns if not explicitly set.
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*
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* @var string
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*/
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protected $baseTable;
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/**
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* The query columns being provided
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*
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* This must be initialized by concrete repository implementations, in the following format
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* <pre><code>
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* array(
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* 'baseTable' => array(
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* 'column1',
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* 'alias1' => 'column2',
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* 'alias2' => 'column3'
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* )
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* )
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* <pre><code>
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*
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* @var array
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*/
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protected $queryColumns;
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/**
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* The columns (or aliases) which are not permitted to be queried. (by design)
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*
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* @var array An array of strings
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*/
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protected $filterColumns;
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/**
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* The default sort rules to be applied on a query
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*
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* This may be initialized by concrete repository implementations, in the following format
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* <pre><code>
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* array(
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* 'alias_or_column_name' => array(
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* 'order' => 'asc'
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* ),
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* 'alias_or_column_name' => array(
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* 'columns' => array(
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* 'once_more_the_alias_or_column_name_as_in_the_parent_key',
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* 'an_additional_alias_or_column_name_with_a_specific_direction asc'
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* ),
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* 'order' => 'desc'
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* ),
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* 'alias_or_column_name' => array(
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* 'columns' => array('a_different_alias_or_column_name_designated_to_act_as_the_only_sort_column')
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* // Ascendant sort by default
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* )
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* )
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* <pre><code>
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* Note that it's mandatory to supply the alias name in case there is one.
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*
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* @var array
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*/
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protected $sortRules;
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/**
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* The value conversion rules to apply on a query
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*
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* This may be initialized by concrete repository implementations and describes for which aliases or column
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* names what type of conversion is available. For entries, where the key is the alias/column and the value
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* is the type identifier, the repository attempts to find a conversion method for the alias/column first and,
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* if none is found, then for the type. If an entry only provides a value, which is the alias/column, the
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* repository only attempts to find a conversion method for the alias/column. The name of a conversion method
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* is expected to be declared using lowerCamelCase. (e.g. user_name will be translated to persistUserName and
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* groupname will be translated to retrieveGroupname)
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*
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* @var array
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*/
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protected $conversionRules;
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/**
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* An array to map table names to aliases
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*
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* @var array
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*/
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protected $aliasTableMap;
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/**
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* A flattened array to map query columns to aliases
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*
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* @var array
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*/
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protected $aliasColumnMap;
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/**
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* Create a new repository object
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*
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* @param Selectable $ds The datasource to use
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*/
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public function __construct(Selectable $ds)
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{
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$this->ds = $ds;
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$this->aliasTableMap = array();
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$this->aliasColumnMap = array();
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$this->init();
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}
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/**
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* Initialize this repository
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*
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* Supposed to be overwritten by concrete repository implementations.
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*/
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protected function init()
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{
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}
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/**
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* Set this repository's name
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*
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* @param string $name
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*
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* @return $this
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*/
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public function setName($name)
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{
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$this->name = $name;
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return $this;
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}
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/**
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* Return this repository's name
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*
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* In case no name has been explicitly set yet, the class name is returned.
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*
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* @return string
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*/
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public function getName()
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{
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return $this->name ?: __CLASS__;
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}
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/**
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* Return the datasource being used
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*
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* @return Selectable
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*/
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public function getDataSource()
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{
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return $this->ds;
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}
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/**
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* Return the base table name this repository is responsible for
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*
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* @return string
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*
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* @throws ProgrammingError In case no base table name has been set and
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* $this->queryColumns does not provide one either
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*/
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public function getBaseTable()
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{
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if ($this->baseTable === null) {
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$queryColumns = $this->getQueryColumns();
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reset($queryColumns);
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$this->baseTable = key($queryColumns);
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if (is_int($this->baseTable) || !is_array($queryColumns[$this->baseTable])) {
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throw new ProgrammingError('"%s" is not a valid base table', $this->baseTable);
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}
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}
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return $this->baseTable;
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}
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/**
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* Return the query columns being provided
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*
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* Calls $this->initializeQueryColumns() in case $this->queryColumns is null.
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*
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* @return array
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*/
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public function getQueryColumns()
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{
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if ($this->queryColumns === null) {
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$this->queryColumns = $this->initializeQueryColumns();
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}
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return $this->queryColumns;
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}
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/**
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* Overwrite this in your repository implementation in case you need to initialize the query columns lazily
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*
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* @return array
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*/
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protected function initializeQueryColumns()
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{
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return array();
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}
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/**
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* Return the columns (or aliases) which are not permitted to be queried
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*
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* Calls $this->initializeFilterColumns() in case $this->filterColumns is null.
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*
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* @return array
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*/
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public function getFilterColumns()
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{
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if ($this->filterColumns === null) {
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$this->filterColumns = $this->initializeFilterColumns();
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}
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return $this->filterColumns;
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}
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/**
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* Overwrite this in your repository implementation in case you need to initialize the filter columns lazily
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*
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* @return array
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*/
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protected function initializeFilterColumns()
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{
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return array();
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}
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/**
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* Return the default sort rules to be applied on a query
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*
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* Calls $this->initializeSortRules() in case $this->sortRules is null.
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*
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* @return array
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*/
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public function getSortRules()
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{
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if ($this->sortRules === null) {
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$this->sortRules = $this->initializeSortRules();
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}
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return $this->sortRules;
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}
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/**
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* Overwrite this in your repository implementation in case you need to initialize the sort rules lazily
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*
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* @return array
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*/
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protected function initializeSortRules()
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{
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return array();
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}
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/**
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* Return the value conversion rules to apply on a query
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*
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* Calls $this->initializeConversionRules() in case $this->conversionRules is null.
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*
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* @return array
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*/
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public function getConversionRules()
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{
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if ($this->conversionRules === null) {
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$this->conversionRules = $this->initializeConversionRules();
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}
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return $this->conversionRules;
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}
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/**
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* Overwrite this in your repository implementation in case you need to initialize the conversion rules lazily
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*
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* @return array
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*/
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protected function initializeConversionRules()
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{
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return array();
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}
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/**
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* Return an array to map table names to aliases
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*
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* @return array
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*/
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protected function getAliasTableMap()
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{
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if (empty($this->aliasTableMap)) {
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$this->initializeAliasMaps();
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}
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return $this->aliasTableMap;
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}
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/**
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* Return a flattened array to map query columns to aliases
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*
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* @return array
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*/
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protected function getAliasColumnMap()
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{
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if (empty($this->aliasColumnMap)) {
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$this->initializeAliasMaps();
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}
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return $this->aliasColumnMap;
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}
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/**
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* Initialize $this->aliasTableMap and $this->aliasColumnMap
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*
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* @throws ProgrammingError In case $this->queryColumns does not provide any column information
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*/
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protected function initializeAliasMaps()
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{
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$queryColumns = $this->getQueryColumns();
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if (empty($queryColumns)) {
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throw new ProgrammingError('Repositories are required to initialize $this->queryColumns first');
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}
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foreach ($queryColumns as $table => $columns) {
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foreach ($columns as $alias => $column) {
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if (! is_string($alias)) {
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$key = $column;
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} else {
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$key = $alias;
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$column = preg_replace('~\n\s*~', ' ', $column);
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}
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if (array_key_exists($key, $this->aliasTableMap)) {
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if ($this->aliasTableMap[$key] !== null) {
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$existingTable = $this->aliasTableMap[$key];
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$existingColumn = $this->aliasColumnMap[$key];
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$this->aliasTableMap[$existingTable . '.' . $key] = $existingTable;
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$this->aliasColumnMap[$existingTable . '.' . $key] = $existingColumn;
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$this->aliasTableMap[$key] = null;
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$this->aliasColumnMap[$key] = null;
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}
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$this->aliasTableMap[$table . '.' . $key] = $table;
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$this->aliasColumnMap[$table . '.' . $key] = $column;
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} else {
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$this->aliasTableMap[$key] = $table;
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$this->aliasColumnMap[$key] = $column;
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}
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}
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}
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}
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/**
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* Return a new query for the given columns
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*
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* @param array $columns The desired columns, if null all columns will be queried
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*
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* @return RepositoryQuery
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*/
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public function select(array $columns = null)
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{
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$query = new RepositoryQuery($this);
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$query->from($this->getBaseTable(), $columns);
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return $query;
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}
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/**
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* Return whether this repository is capable of converting values
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*
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* @return bool
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*/
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public function providesValueConversion()
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{
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$conversionRules = $this->getConversionRules();
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return !empty($conversionRules);
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}
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/**
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* Convert a value supposed to be transmitted to the data source
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*
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* @param string $name The alias or column name
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* @param mixed $value The value to convert
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*
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* @return mixed If conversion was possible, the converted value, otherwise the unchanged value
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*/
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public function persistColumn($name, $value)
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{
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$converter = $this->getConverter($name, 'persist');
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if ($converter !== null) {
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$value = $this->$converter($value);
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}
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return $value;
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}
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/**
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* Convert a value which was fetched from the data source
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*
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* @param string $name The alias or column name
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* @param mixed $value The value to convert
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*
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* @return mixed If conversion was possible, the converted value, otherwise the unchanged value
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*/
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public function retrieveColumn($name, $value)
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{
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$converter = $this->getConverter($name, 'retrieve');
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if ($converter !== null) {
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$value = $this->$converter($value);
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}
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return $value;
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}
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/**
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* Return the name of the conversion method for the given alias or column name and context
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*
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* @param string $name The alias or column name for which to return a conversion method
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* @param string $context The context of the conversion: persist or retrieve
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*
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* @return string
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*
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* @throws ProgrammingError In case a conversion rule is found but not any conversion method
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*/
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protected function getConverter($name, $context)
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{
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$conversionRules = $this->getConversionRules();
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// Check for a conversion method for the alias/column first
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if (array_key_exists($name, $conversionRules) || in_array($name, $conversionRules)) {
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$methodName = $context . join('', array_map('ucfirst', explode('_', $name)));
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if (method_exists($this, $methodName)) {
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return $methodName;
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}
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}
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// The conversion method for the type is just a fallback, but it is required to exist if defined
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if (isset($conversionRules[$name])) {
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$identifier = join('', array_map('ucfirst', explode('_', $conversionRules[$name])));
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if (! method_exists($this, $context . $identifier)) {
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// Do not throw an error in case at least one conversion method exists
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if (! method_exists($this, ($context === 'persist' ? 'retrieve' : 'persist') . $identifier)) {
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throw new ProgrammingError(
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'Cannot find any conversion method for type "%s"'
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. '. Add a proper conversion method or remove the type definition',
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$conversionRules[$name]
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);
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}
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Logger::debug(
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'Conversion method "%s" for type definition "%s" does not exist in repository "%s".',
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$context . $identifier,
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$conversionRules[$name],
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$this->getName()
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);
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} else {
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return $context . $identifier;
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}
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}
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}
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/**
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* Convert a timestamp or DateTime object to a string formatted using static::DATETIME_FORMAT
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*
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* @param mixed $value
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*
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* @return string
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*/
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protected function persistDateTime($value)
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{
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if (is_numeric($value)) {
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$value = date(static::DATETIME_FORMAT, $value);
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} elseif ($value instanceof DateTime) {
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$value = date(static::DATETIME_FORMAT, $value->getTimestamp()); // Using date here, to ignore any timezone
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} elseif ($value !== null) {
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throw new ProgrammingError(
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'Cannot persist value "%s" as type date_time. It\'s not a timestamp or DateTime object',
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$value
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);
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}
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return $value;
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}
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|
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/**
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* Convert a string formatted using static::DATETIME_FORMAT to a unix timestamp
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*
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* @param string $value
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*
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* @return int
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*/
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protected function retrieveDateTime($value)
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{
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if (is_numeric($value)) {
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$value = (int) $value;
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} elseif (is_string($value)) {
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$dateTime = DateTime::createFromFormat(static::DATETIME_FORMAT, $value);
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if ($dateTime === false) {
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Logger::debug(
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'Unable to parse string "%s" as type date_time with format "%s" in repository "%s"',
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$value,
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static::DATETIME_FORMAT,
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$this->getName()
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);
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$value = null;
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} else {
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$value = $dateTime->getTimestamp();
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}
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} elseif ($value !== null) {
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throw new ProgrammingError(
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'Cannot retrieve value "%s" as type date_time. It\'s not a integer or (numeric) string',
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$value
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);
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}
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return $value;
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}
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|
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/**
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* Convert the given array to an comma separated string
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*
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* @param array|string $value
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*
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* @return string
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*/
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protected function persistCommaSeparatedString($value)
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{
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if (is_array($value)) {
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$value = join(',', array_map('trim', $value));
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} elseif ($value !== null && !is_string($value)) {
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throw new ProgrammingError('Cannot persist value "%s" as comma separated string', $value);
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}
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return $value;
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}
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|
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/**
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|
* Convert the given comma separated string to an array
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*
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* @param string $value
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*
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* @return array
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*/
|
|
protected function retrieveCommaSeparatedString($value)
|
|
{
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|
if ($value && is_string($value)) {
|
|
$value = String::trimSplit($value);
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} elseif ($value !== null) {
|
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throw new ProgrammingError('Cannot retrieve value "%s" as array. It\'s not a string', $value);
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}
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|
|
return $value;
|
|
}
|
|
|
|
/**
|
|
* Validate that the requested table exists
|
|
*
|
|
* @param string $table The table to validate
|
|
* @param RepositoryQuery $query An optional query to pass as context
|
|
* (unused by the base implementation)
|
|
*
|
|
* @return string The table's name, may differ from the given one
|
|
*
|
|
* @throws ProgrammingError In case the given table does not exist
|
|
*/
|
|
public function requireTable($table, RepositoryQuery $query = null)
|
|
{
|
|
$queryColumns = $this->getQueryColumns();
|
|
if (! isset($queryColumns[$table])) {
|
|
throw new ProgrammingError('Table "%s" not found', $table);
|
|
}
|
|
|
|
return $table;
|
|
}
|
|
|
|
/**
|
|
* Recurse the given filter, require each column for the given table and convert all values
|
|
*
|
|
* @param string $table The table being filtered
|
|
* @param Filter $filter The filter to recurse
|
|
* @param RepositoryQuery $query An optional query to pass as context
|
|
* (Directly passed through to $this->requireFilterColumn)
|
|
*/
|
|
public function requireFilter($table, Filter $filter, RepositoryQuery $query = null)
|
|
{
|
|
if ($filter->isExpression()) {
|
|
$column = $filter->getColumn();
|
|
$filter->setColumn($this->requireFilterColumn($table, $column, $query));
|
|
$filter->setExpression($this->persistColumn($column, $filter->getExpression()));
|
|
} elseif ($filter->isChain()) {
|
|
foreach ($filter->filters() as $chainOrExpression) {
|
|
$this->requireFilter($table, $chainOrExpression, $query);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return this repository's query columns of the given table mapped to their respective aliases
|
|
*
|
|
* @param string $table
|
|
*
|
|
* @return array
|
|
*
|
|
* @throws ProgrammingError In case $table does not exist
|
|
*/
|
|
public function requireAllQueryColumns($table)
|
|
{
|
|
$queryColumns = $this->getQueryColumns();
|
|
if (! array_key_exists($table, $queryColumns)) {
|
|
throw new ProgrammingError('Table name "%s" not found', $table);
|
|
}
|
|
|
|
return $queryColumns[$table];
|
|
}
|
|
|
|
/**
|
|
* Return the query column name for the given alias or null in case the alias does not exist
|
|
*
|
|
* @param string $table
|
|
* @param string $alias
|
|
*
|
|
* @return string|null
|
|
*/
|
|
public function resolveQueryColumnAlias($table, $alias)
|
|
{
|
|
$aliasColumnMap = $this->getAliasColumnMap();
|
|
if (isset($aliasColumnMap[$alias])) {
|
|
return $aliasColumnMap[$alias];
|
|
}
|
|
|
|
$prefixedAlias = $table . '.' . $alias;
|
|
if (isset($aliasColumnMap[$prefixedAlias])) {
|
|
return $aliasColumnMap[$prefixedAlias];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return whether the given alias or query column name is available in the given table
|
|
*
|
|
* @param string $table
|
|
* @param string $alias
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function validateQueryColumnAssociation($table, $alias)
|
|
{
|
|
$aliasTableMap = $this->getAliasTableMap();
|
|
if (isset($aliasTableMap[$alias])) {
|
|
return $aliasTableMap[$alias] === $table;
|
|
}
|
|
|
|
$prefixedAlias = $table . '.' . $alias;
|
|
return isset($aliasTableMap[$prefixedAlias]);
|
|
}
|
|
|
|
/**
|
|
* Return whether the given column name or alias is a valid query column
|
|
*
|
|
* @param string $table The table where to look for the column or alias
|
|
* @param string $name The column name or alias to check
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function hasQueryColumn($table, $name)
|
|
{
|
|
if (in_array($name, $this->getFilterColumns())) {
|
|
return false;
|
|
}
|
|
|
|
return $this->resolveQueryColumnAlias($table, $name) !== null
|
|
&& $this->validateQueryColumnAssociation($table, $name);
|
|
}
|
|
|
|
/**
|
|
* Validate that the given column is a valid query target and return it or the actual name if it's an alias
|
|
*
|
|
* @param string $table The table where to look for the column or alias
|
|
* @param string $name The name or alias of the column to validate
|
|
* @param RepositoryQuery $query An optional query to pass as context (unused by the base implementation)
|
|
*
|
|
* @return string The given column's name
|
|
*
|
|
* @throws QueryException In case the given column is not a valid query column
|
|
*/
|
|
public function requireQueryColumn($table, $name, RepositoryQuery $query = null)
|
|
{
|
|
if (in_array($name, $this->getFilterColumns())) {
|
|
throw new QueryException(t('Filter column "%s" cannot be queried'), $name);
|
|
}
|
|
|
|
if (($column = $this->resolveQueryColumnAlias($table, $name)) === null) {
|
|
throw new QueryException(t('Query column "%s" not found'), $name);
|
|
}
|
|
|
|
if (! $this->validateQueryColumnAssociation($table, $name)) {
|
|
throw new QueryException(t('Query column "%s" not found in table "%s"'), $name, $table);
|
|
}
|
|
|
|
return $column;
|
|
}
|
|
|
|
/**
|
|
* Return whether the given column name or alias is a valid filter column
|
|
*
|
|
* @param string $table The table where to look for the column or alias
|
|
* @param string $name The column name or alias to check
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function hasFilterColumn($table, $name)
|
|
{
|
|
return $this->resolveQueryColumnAlias($table, $name) !== null
|
|
&& $this->validateQueryColumnAssociation($table, $name);
|
|
}
|
|
|
|
/**
|
|
* Validate that the given column is a valid filter target and return it or the actual name if it's an alias
|
|
*
|
|
* @param string $table The table where to look for the column or alias
|
|
* @param string $name The name or alias of the column to validate
|
|
* @param RepositoryQuery $query An optional query to pass as context (unused by the base implementation)
|
|
*
|
|
* @return string The given column's name
|
|
*
|
|
* @throws QueryException In case the given column is not a valid filter column
|
|
*/
|
|
public function requireFilterColumn($table, $name, RepositoryQuery $query = null)
|
|
{
|
|
if (($column = $this->resolveQueryColumnAlias($table, $name)) === null) {
|
|
throw new QueryException(t('Filter column "%s" not found'), $name);
|
|
}
|
|
|
|
if (! $this->validateQueryColumnAssociation($table, $name)) {
|
|
throw new QueryException(t('Filter column "%s" not found in table "%s"'), $name, $table);
|
|
}
|
|
|
|
return $column;
|
|
}
|
|
|
|
/**
|
|
* Return whether the given column name or alias of the given table is a valid statement column
|
|
*
|
|
* @param string $table The table where to look for the column or alias
|
|
* @param string $name The column name or alias to check
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function hasStatementColumn($table, $name)
|
|
{
|
|
return $this->hasQueryColumn($table, $name);
|
|
}
|
|
|
|
/**
|
|
* Validate that the given column is a valid statement column and return it or the actual name if it's an alias
|
|
*
|
|
* @param string $table The table for which to require the column
|
|
* @param string $name The name or alias of the column to validate
|
|
*
|
|
* @return string The given column's name
|
|
*
|
|
* @throws StatementException In case the given column is not a statement column
|
|
*/
|
|
public function requireStatementColumn($table, $name)
|
|
{
|
|
if (in_array($name, $this->filterColumns)) {
|
|
throw new StatementException('Filter column "%s" cannot be referenced in a statement', $name);
|
|
}
|
|
|
|
if (($column = $this->resolveQueryColumnAlias($table, $name)) === null) {
|
|
throw new StatementException('Statement column "%s" not found', $name);
|
|
}
|
|
|
|
if (! $this->validateQueryColumnAssociation($table, $name)) {
|
|
throw new StatementException('Statement column "%s" not found in table "%s"', $name, $table);
|
|
}
|
|
|
|
return $column;
|
|
}
|
|
|
|
/**
|
|
* Resolve the given aliases or column names of the given table supposed to be persisted and convert their values
|
|
*
|
|
* @param string $table
|
|
* @param array $data
|
|
*
|
|
* @return array
|
|
*/
|
|
public function requireStatementColumns($table, array $data)
|
|
{
|
|
$resolved = array();
|
|
foreach ($data as $alias => $value) {
|
|
$resolved[$this->requireStatementColumn($table, $alias)] = $this->persistColumn($alias, $value);
|
|
}
|
|
|
|
return $resolved;
|
|
}
|
|
}
|