nur-sery/nur_src/io/Ttmpwriter.php

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2023-12-03 22:10:18 +04:00
<?php
namespace nur\io;
use nur\b\io\IWriter;
use nur\b\io\TmpfileWriter;
use nur\writer;
trait Ttmpwriter {
protected $ppOutput;
function pp_setOutput($output): void {
if ($output instanceof IWriter) $this->writer = $output;
else $this->ppOutput = $output;
}
protected $useTmpfile;
/**
* utiliser un fichier temporaire pour la sortie, puis créer $output en une
* seule fois à la fin, lors de la fermeture de l'objet.
*
* $useTmpfile peut être un booléen, mais aussi un nom de fichier: dans ce
* cas la fonctionnalité n'est activée que si $useTmpfile et $output
* désignent le même fichier
*/
function setUseTmpfile($useTmpfile=true): self {
if (is_string($useTmpfile)) {
if (writer::is_file($useTmpfile)) {
$useTmpfile = realpath($useTmpfile) === realpath($this->ppOutput);
} else {
$useTmpfile = false;
}
}
$this->useTmpfile = boolval($useTmpfile);
return $this;
}
/** @var IWriter */
protected $writer;
protected function buildWriter(bool $appendFilters, ?string $mode): void {
if ($mode === null) $mode = "w+b";
$this->writer = writer::with($this->ppOutput, $mode);
if ($appendFilters) $this->_rwAppendFilters($this->writer);
}
/** @var TmpfileWriter */
protected $tmpwriter;
protected function getWriter(): IWriter {
return $this->useTmpfile? $this->tmpwriter: $this->writer;
}
protected function setupWriter(bool $useFilters, ?string $mode=null): void {
if ($this->useTmpfile) {
$this->tmpwriter = new TmpfileWriter();
} else if ($this->writer === null) {
$this->buildWriter($useFilters, $mode);
}
}
protected function ensureWriter(bool $useFilters, ?string $mode=null): IWriter {
if ($this->writer === null && $this->tmpwriter === null) {
$this->setupWriter($useFilters, $mode);
}
return $this->getWriter();
}
protected function teardownWriter(bool $useFilters, ?string $mode=null): void {
if ($this->tmpwriter !== null) {
$this->tmpwriter->close();
$this->buildWriter($useFilters, $mode);
$this->tmpwriter->getReader()->copyTo($this->writer);
$this->tmpwriter = null;
}
if ($this->writer !== null) {
$this->writer->close();
$this->writer = null;
}
}
}