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lots of documentation, new methods

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deleteDocumentPreviews() removeѕ all previews of a document,
finisch deletePreview()
This commit is contained in:
Uwe Steinmann 2016-04-26 12:07:39 +02:00
parent 127ae5c487
commit b2186874e6
1 changed files with 113 additions and 53 deletions
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166
SeedDMS_Preview/Preview/Previewer.php
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@ -93,13 +93,13 @@ class SeedDMS_Preview_Previewer {
} /* }}} */
/**
* Retrieve the physical filename of the preview image on disk
* Return the physical filename of the preview image on disk
*
* @param object $object document content or document file
* @param integer $width width of preview image
* @return string file name of preview image
*/
protected function getFileName($object, $width) { /* }}} */
protected function getFileName($object, $width) { /* {{{ */
if(!$object)
return false;
@ -121,10 +121,18 @@ class SeedDMS_Preview_Previewer {
/**
* Create a preview image for a given file
*
* This method creates a preview image in png format for a regular file
* in the file system and stores the result in the directory $dir relative
* to the configured preview directory. The filename of the resulting preview
* image is either $target.png (if set) or md5($infile)-$width.png.
* The $mimetype is used to select the propper conversion programm.
* An already existing preview image is replaced.
*
* @param string $infile name of input file including full path
* @param string $dir directory relative to $this->previewDir
* @param string $mimetype MimeType of input file
* @param integer $width width of generated preview image
* @param string $target optional name of preview image (without extension)
* @return boolean true on success, false on failure
*/
public function createRawPreview($infile, $dir, $mimetype, $width=0, $target='') { /* {{{ */
@ -177,6 +185,19 @@ class SeedDMS_Preview_Previewer {
} /* }}} */
/**
* Create preview image
*
* This function creates a preview image for the given document
* content or document file. It internally uses
* {@link SeedDMS_Preview::createRawPreview()}. The filename of the
* preview image is created by {@link SeedDMS_Preview_Previewer::getFileName()}
*
* @param object $object instance of SeedDMS_Core_DocumentContent
* or SeedDMS_Core_DocumentFile
* @param integer $width desired width of preview image
* @return boolean true on success, false on failure
*/
public function createPreview($object, $width=0) { /* {{{ */
if(!$object)
return false;
@ -189,58 +210,19 @@ class SeedDMS_Preview_Previewer {
$file = $document->_dms->contentDir.$object->getPath();
$target = $this->getFileName($object, $width);
return $this->createRawPreview($file, $document->getDir(), $object->getMimeType(), $width, $target);
if($width == 0)
$width = $this->width;
else
$width = intval($width);
if(!$this->previewDir)
return false;
$document = $object->getDocument();
$dir = $this->previewDir.'/'.$document->getDir();
if(!is_dir($dir)) {
if (!SeedDMS_Core_File::makeDir($dir)) {
return false;
}
}
$file = $document->_dms->contentDir.$object->getPath();
if(!file_exists($file))
return false;
$target = $this->getFileName($object, $width);
if($target !== false && (!file_exists($target.'.png') || filectime($target.'.png') < $object->getDate())) {
$cmd = '';
switch($object->getMimeType()) {
case "image/png":
case "image/gif":
case "image/jpeg":
case "image/jpg":
case "image/svg+xml":
$cmd = 'convert -resize '.$width.'x '.$file.' '.$target.'.png';
break;
case "application/pdf":
case "application/postscript":
$cmd = 'convert -density 100 -resize '.$width.'x '.$file.'[0] '.$target.'.png';
break;
case "text/plain":
$cmd = 'convert -resize '.$width.'x '.$file.'[0] '.$target.'.png';
break;
case "application/x-compressed-tar":
$cmd = 'tar tzvf '.$file.' | convert -density 100 -resize '.$width.'x text:-[0] '.$target.'.png';
break;
}
if($cmd) {
//exec($cmd);
try {
self::execWithTimeout($cmd, $this->timeout);
} catch(Exception $e) {
}
}
return true;
}
return true;
} /* }}} */
/**
* Check if a preview image already exists.
*
* This function is a companion to {@link SeedDMS_Preview_Previewer::createRawPreview()}.
*
* @param string $infile name of input file including full path
* @param string $dir directory relative to $this->previewDir
* @param integer $width desired width of preview image
* @return boolean true if preview exists, otherwise false
*/
public function hasRawPreview($infile, $dir, $width=0) { /* {{{ */
if($width == 0)
$width = $this->width;
@ -255,6 +237,16 @@ class SeedDMS_Preview_Previewer {
return false;
} /* }}} */
/**
* Check if a preview image already exists.
*
* This function is a companion to {@link SeedDMS_Preview_Previewer::createPreview()}.
*
* @param object $object instance of SeedDMS_Core_DocumentContent
* or SeedDMS_Core_DocumentFile
* @param integer $width desired width of preview image
* @return boolean true if preview exists, otherwise false
*/
public function hasPreview($object, $width=0) { /* {{{ */
if(!$object)
return false;
@ -272,6 +264,16 @@ class SeedDMS_Preview_Previewer {
return false;
} /* }}} */
/**
* Return a preview image.
*
* This function returns the content of a preview image if it exists..
*
* @param string $infile name of input file including full path
* @param string $dir directory relative to $this->previewDir
* @param integer $width desired width of preview image
* @return boolean/string image content if preview exists, otherwise false
*/
public function getRawPreview($infile, $dir, $width=0) { /* {{{ */
if($width == 0)
$width = $this->width;
@ -286,6 +288,16 @@ class SeedDMS_Preview_Previewer {
}
} /* }}} */
/**
* Return a preview image.
*
* This function returns the content of a preview image if it exists..
*
* @param object $object instance of SeedDMS_Core_DocumentContent
* or SeedDMS_Core_DocumentFile
* @param integer $width desired width of preview image
* @return boolean/string image content if preview exists, otherwise false
*/
public function getPreview($object, $width=0) { /* {{{ */
if($width == 0)
$width = $this->width;
@ -300,6 +312,15 @@ class SeedDMS_Preview_Previewer {
}
} /* }}} */
/**
* Return file size preview image.
*
* @param object $object instance of SeedDMS_Core_DocumentContent
* or SeedDMS_Core_DocumentFile
* @param integer $width desired width of preview image
* @return boolean/integer size of preview image or false if image
* does not exist
*/
public function getFilesize($object, $width=0) { /* {{{ */
if($width == 0)
$width = $this->width;
@ -314,8 +335,15 @@ class SeedDMS_Preview_Previewer {
} /* }}} */
public function deletePreview($document, $object, $width=0) { /* {{{ */
/**
* Delete preview image.
*
* @param object $object instance of SeedDMS_Core_DocumentContent
* or SeedDMS_Core_DocumentFile
* @param integer $width desired width of preview image
* @return boolean true if deletion succeded or false if file does not exist
*/
public function deletePreview($object, $width=0) { /* {{{ */
if($width == 0)
$width = $this->width;
else
@ -324,6 +352,38 @@ class SeedDMS_Preview_Previewer {
return false;
$target = $this->getFileName($object, $width);
if($target && file_exists($target.'.png')) {
return(unlink($target.'.png'));
} else {
return false;
}
} /* }}} */
/**
* Delete all preview images belonging to a document
*
* This function removes the preview images of all versions and
* files of a document including the directory. It actually just
* removes the directory for the document in the cache.
*
* @param object $document instance of SeedDMS_Core_Document
* @return boolean true if deletion succeded or false if file does not exist
*/
public function deleteDocumentPreviews($document) { /* {{{ */
if(!$this->previewDir)
return false;
function recurseRmdir($dir) {
$files = array_diff(scandir($dir), array('.','..'));
foreach ($files as $file) {
(is_dir("$dir/$file")) ? recurseRmdir("$dir/$file") : unlink("$dir/$file");
}
return rmdir($dir);
}
$dir = $this->previewDir.'/'.$document->getDir();
return recurseRmdir($dir);
} /* }}} */
}
?>