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get_page_count()

Parameters

ColumnTypeDefaultDescription
$resource
$alternative -1

Location

include/resource_functions.php lines 6210 to 6279

Definition

 
function get_page_count($resource,$alternative=-1)
    {
    # gets page count for multipage previews from resource_dimensions table.
    # also handle alternative file multipage previews by switching $resource array if necessary
    # $alternative specifies an actual alternative file
    $ref=$resource['ref'];

    if ($alternative!=-1)
        {
        $pagecount=ps_value("select page_count value from resource_alt_files where ref=?",array("i",$alternative),"");
        $resource=get_alternative_file($ref,$alternative);
        }
    else
        {
        $pagecount=ps_value("select page_count value from resource_dimensions where resource=?", array("i",$ref), "");
        }
    if (!empty($pagecount)) { return $pagecount; }
    # or, populate this column with exiftool or image magick (for installations with many pdfs already
    # previewed and indexed, this allows pagecount updates on the fly when needed):
    # use exiftool.
    if ($resource['file_extension']=="pdf" && $alternative==-1)
        {
        $file=get_resource_path($ref,true,"",false,"pdf");
        }
    elseif ($alternative==-1)
        {
        # some unoconv files are not pdfs but this needs to use the auto-alt file
        $alt_ref=ps_value("select ref value from resource_alt_files where resource=? and unoconv=1",array("i",$ref), "");
        $file=get_resource_path($ref,true,"",false,"pdf",-1,1,false,"",$alt_ref);
        }
    else
        {
        $file=get_resource_path($ref,true,"",false,"pdf",-1,1,false,"",$alternative);
        }

    if (file_exists($file)) {
        # locate exiftool
        $exiftool_fullpath = get_utility_path("exiftool");
        
        $cmdparams = [
            '[FILE]' => new CommandPlaceholderArg($file, 'is_valid_rs_path'),
        ];
        if ($exiftool_fullpath == false) {
            # Try with ImageMagick instead
            $command = get_utility_path("im-identify") . ' -format %n [FILE]';
            $pages = trim(run_command($command, false, $cmdparams));
        } else {
            $command = $exiftool_fullpath . " -sss -pagecount [FILE]";
            $output = run_command($command, false, $cmdparams);
            $pages = str_replace("Page Count","",$output);
            $pages = str_replace(":","",$pages);
            $pages = trim($pages);
        }
        if (!is_numeric($pages)) {
            $pages = 1; // default to 1 page if we didn't get anything back
        }
    } else {
        $pages = 1;
    }

    if ($alternative!=-1)
        {
        ps_query("update resource_alt_files set page_count=? where ref=?",array("i",$pages,"i",$alternative));
        }
    else
        {
        ps_query("update resource_dimensions set page_count=? where resource=?",array("i",$pages,"i",$ref));
        }
    return $pages;
    }

This article was last updated 4th December 2024 09:05 Europe/London time based on the source file dated 28th November 2024 12:10 Europe/London time.