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