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Introduce Repository, Factory, Collection, Model base classes

pull/8065/head
Hypolite Petovan 1 year ago
parent
commit
c748a82e8f
4 changed files with 291 additions and 26 deletions
  1. +42
    -0
      src/BaseCollection.php
  2. +22
    -0
      src/BaseFactory.php
  3. +27
    -26
      src/BaseModel.php
  4. +200
    -0
      src/BaseRepository.php

+ 42
- 0
src/BaseCollection.php View File

@ -0,0 +1,42 @@
<?php
namespace Friendica;
use Friendica\Database\Database;
use Friendica\Database\DBA;
use Psr\Log\LoggerInterface;
/**
* The Collection classes inheriting from this abstract class are meant to represent a list of database record.
* The associated model class has to be provided in the child classes.
*
* Collections can be used with foreach(), accessed like an array and counted.
*/
abstract class BaseCollection extends \ArrayIterator
{
/**
* This property is used with paginated results to hold the total number of items satisfying the paginated request.
* @var int
*/
protected $totalCount = 0;
/**
* @param BaseModel[] $models
* @param int|null $totalCount
*/
public function __construct(array $models = [], int $totalCount = null)
{
parent::__construct($models);
$this->models = $models;
$this->totalCount = $totalCount ?? count($models);
}
/**
* @return int
*/
public function getTotalCount()
{
return $this->totalCount;
}
}

+ 22
- 0
src/BaseFactory.php View File

@ -0,0 +1,22 @@
<?php
namespace Friendica;
use Psr\Log\LoggerInterface;
/**
* Factories act as an intermediary to avoid direct Entitiy instanciation.
*
* @see BaseModel
* @see BaseCollection
*/
abstract class BaseFactory
{
/** @var LoggerInterface */
protected $logger;
public function __construct(LoggerInterface $logger)
{
$this->logger = $logger;
}
}

+ 27
- 26
src/BaseModel.php View File

@ -7,8 +7,6 @@ use Friendica\Network\HTTPException;
use Psr\Log\LoggerInterface;
/**
* Class BaseModel
*
* The Model classes inheriting from this abstract class are meant to represent a single database record.
* The associated table name has to be provided in the child class, and the table is expected to have a unique `id` field.
*
@ -32,13 +30,33 @@ abstract class BaseModel
*/
private $data = [];
public function __construct(Database $dba, LoggerInterface $logger, $data = [])
/**
* @param Database $dba
* @param LoggerInterface $logger
* @param array $data Table row attributes
*/
public function __construct(Database $dba, LoggerInterface $logger, array $data = [])
{
$this->dba = $dba;
$this->logger = $logger;
$this->data = $data;
}
/**
* Performance-improved model creation in a loop
*
* @param BaseModel $prototype
* @param array $data
* @return BaseModel
*/
public static function createFromPrototype(BaseModel $prototype, array $data)
{
$model = clone $prototype;
$model->data = $data;
return $model;
}
/**
* Magic getter. This allows to retrieve model fields with the following syntax:
* - $model->field (outside of class)
@ -62,33 +80,16 @@ abstract class BaseModel
}
/**
* Fetches a single model record. The condition array is expected to contain a unique index (primary or otherwise).
*
* Chainable.
*
* @param array $condition
* @return BaseModel
* @throws HTTPException\NotFoundException
* @param string $name
* @param mixed $value
*/
public function fetch(array $condition)
public function __set($name, $value)
{
$data = $this->dba->selectFirst(static::$table_name, [], $condition);
if (!$data) {
throw new HTTPException\NotFoundException(static::class . ' record not found.');
}
return new static($this->dba, $this->logger, $data);
$this->data[$name] = $value;
}
/**
* Deletes the model record from the database.
* Prevents further methods from being called by wiping the internal model data.
*/
public function delete()
public function toArray()
{
if ($this->dba->delete(static::$table_name, ['id' => $this->id])) {
$this->data = [];
}
return $this->data;
}
}

+ 200
- 0
src/BaseRepository.php View File

@ -0,0 +1,200 @@
<?php
namespace Friendica;
use Friendica\Database\Database;
use Friendica\Database\DBA;
use Friendica\Network\HTTPException;
use Psr\Log\LoggerInterface;
/**
* Repositories are Factories linked to one or more database tables.
*
* @see BaseModel
* @see BaseCollection
*/
abstract class BaseRepository extends BaseFactory
{
const LIMIT = 30;
/** @var Database */
protected $dba;
/** @var string */
protected static $table_name;
/** @var BaseModel */
protected static $model_class;
/** @var BaseCollection */
protected static $collection_class;
public function __construct(Database $dba, LoggerInterface $logger)
{
parent::__construct($logger);
$this->dba = $dba;
$this->logger = $logger;
}
/**
* Fetches a single model record. The condition array is expected to contain a unique index (primary or otherwise).
*
* Chainable.
*
* @param array $condition
* @return BaseModel
* @throws HTTPException\NotFoundException
*/
public function selectFirst(array $condition)
{
$data = $this->dba->selectFirst(static::$table_name, [], $condition);
if (!$data) {
throw new HTTPException\NotFoundException(static::class . ' record not found.');
}
return $this->create($data);
}
/**
* Populates a Collection according to the condition.
*
* Chainable.
*
* @param array $condition
* @param array $params
* @return BaseCollection
* @throws \Exception
*/
public function select(array $condition = [], array $params = [])
{
$models = $this->selectModels($condition, $params);
return new static::$collection_class($models);
}
/**
* Populates the collection according to the condition. Retrieves a limited subset of models depending on the boundaries
* and the limit. The total count of rows matching the condition is stored in the collection.
*
* Chainable.
*
* @param array $condition
* @param array $params
* @param int? $max_id
* @param int? $since_id
* @param int $limit
* @return BaseCollection
* @throws \Exception
*/
public function selectByBoundaries(array $condition = [], array $params = [], int $max_id = null, int $since_id = null, int $limit = self::LIMIT)
{
$condition = DBA::collapseCondition($condition);
$boundCondition = $condition;
if (isset($max_id)) {
$boundCondition[0] .= " AND `id` < ?";
$boundCondition[] = $max_id;
}
if (isset($since_id)) {
$boundCondition[0] .= " AND `id` > ?";
$boundCondition[] = $since_id;
}
$params['limit'] = $limit;
$models = $this->selectModels($boundCondition, $params);
$totalCount = DBA::count(static::$table_name, $condition);
return new static::$collection_class($models, $totalCount);
}
/**
* This method updates the database row from the model.
*
* @param BaseModel $model
* @return bool
* @throws \Exception
*/
public function update(BaseModel $model)
{
return $this->dba->update(static::$table_name, $model->toArray(), ['id' => $model->id], true);
}
/**
* This method creates a new database row and returns a model if it was successful.
*
* @param array $fields
* @return BaseModel|bool
* @throws \Exception
*/
public function insert(array $fields)
{
$return = $this->dba->insert(static::$table_name, $fields);
if ($return) {
$fields['id'] = $this->dba->lastInsertId();
$return = $this->create($fields);
}
return $return;
}
/**
* Deletes the model record from the database.
*
* @param BaseModel $model
* @return bool
* @throws \Exception
*/
public function delete(BaseModel &$model)
{
if ($success = $this->dba->delete(static::$table_name, ['id' => $model->id])) {
$model = null;
}
return $success;
}
/**
* Base instantiation method, can be overriden to add specific dependencies
*
* @param array $data
* @return BaseModel
*/
protected function create(array $data)
{
return new static::$model_class($this->dba, $this->logger, $data);
}
/**
* @param array $condition Query condition
* @param array $params Additional query parameters
* @return BaseModel[]
* @throws \Exception
*/
protected function selectModels(array $condition, array $params = [])
{
$result = $this->dba->select(static::$table_name, [], $condition, $params);
/** @var BaseModel $prototype */
$prototype = null;
$models = [];
while ($record = $this->dba->fetch($result)) {
if ($prototype === null) {
$prototype = $this->create($record);
$models[] = $prototype;
} else {
$models[] = static::$model_class::createFromPrototype($prototype, $record);
}
}
return $models;
}
}

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