# $Id: WebDocument.xotcl,v 1.7 2007/08/06 11:35:56 neumann Exp $

package provide xotcl::actiweb::webDocument 0.8

package require xotcl::actiweb::webObject
package require xotcl::comm::httpAccess
package require xotcl::mixinStrategy
package require xotcl::actiweb::sendStrategy

package require XOTcl

namespace eval ::xotcl::actiweb::webDocument {
    namespace import ::xotcl::*

    Class WebDocument -superclass WebObject \
	-parameter {
	    {content ""}
	    filename
	}


    WebDocument instproc init args {
	my exportProcs content contentType
	next
	my mixinStrategy ::Send=TypedString
    }

    WebDocument instproc attachFile filename {
	my filename $filename
	my set oldSendStrategy [my mixinStrategy ::Send=File]
	my contentType [Mime guessContentType $filename]
    }

    WebDocument instproc detachFile {} {
	my mixinStrategy [my set oldSendStrategy]
	my unset contentType
	my unset filename
    }

    WebDocument instproc default args {
	if {[my exists content]} {
	    return [my content]
	}
	return ""
    }
    #WebDocument instproc contentLength {} {
    #  my showCall
    #  return [expr {[string length [my content]] + 1}]
    #}


    Class TextDocument -superclass WebDocument
    TextDocument instproc init args {
	next
	my contentType text/plain
    }


    Class HtmlDocument -superclass TextDocument
    HtmlDocument instproc init args {
	next
	my contentType text/html
    }

    Class FileDocument -superclass WebDocument

    #
    # class factory creates classes on the fly if they do not exist
    # already, otherwise return exisiting class
    #
    # auch flyweigth
    Class DocumentClassFactory
    DocumentClassFactory abstract instproc getClass contentType

    Class FileDocumentClassFactory -superclass DocumentClassFactory
    FileDocumentClassFactory instproc getClass contentType {
	if {[FileDocument info classchildren $contentType] eq ""} {
	    Class ::FileDocument::${contentType} -superclass FileDocument
	}
	return ::FileDocument::${contentType}
    }

    Class DocumentFactory
    DocumentFactory abstract instproc create {name args}  

    Class FileDocumentFactory -superclass DocumentFactory
    FileDocumentFactory instproc create {name class filename} {
	$class $name
	#$name contentType [$class set contentType]
	$name attachFile $filename
	return $name
    }

    Class FileObjectifier 

    FileObjectifier instproc init args {
	next
	FileDocumentClassFactory [self]::clFactory
	FileDocumentFactory [self]::objFactory
    }

    #
    # filename must be given with full path ->
    # create objects with filename's tail (prefix can be used to
    # give object name a preceding dir)
    #
    FileObjectifier instproc objectifyFile {place filename {prefix ""}} {
	set obj ""
	if {[file isfile $filename]} {
	    set type [Mime guessContentType $filename]
	    #if {$type ne "unknown/unknown"} {
	    set fn [string trimleft $prefix/[file tail $filename] /]
	    set class [[self]::clFactory getClass $type]
	    set obj [[self]::objFactory create $fn $class $filename]
	    $place exportObjs $obj
	    #puts stderr "...objectified:  $obj of class $class"
	    #}
	}
	return $obj
    }

    #
    # objectify a whole directory tree
    #
    FileObjectifier instproc objectifyTree {place dir {prefix ""}} {
	if {[file isdirectory $dir]} {
	    foreach f [glob  -nocomplain $dir/*] {
		if {[file isfile $f]} {
		    my objectifyFile $place $f $prefix
		} elseif {[file isdirectory $f]} {
		    my objectifyTree $place $f $prefix/[file tail $f]
		}
	    }
	}
    }


    Class GraphicDirectoryObjectifier -superclass FileObjectifier \
	-parameter {{thumbnaildir [::xotcl::tmpdir]}}
    GraphicDirectoryObjectifier instproc objectifyTree {place dir {prefix ""}} {
	if {[file isdirectory $dir]} {
	    set indexpage ""
	    set title ""
	    set date ""
	    foreach f [lsort [glob -nocomplain $dir/* $dir/{.date,.title}]] {
		set exportedfn [string trimleft $prefix/[file tail $f] /]
		if {[file isfile $f]} {
		    set type [Mime guessContentType $f]
		    if {[string match "image/*" $type]} {
			set class [[self]::clFactory getClass $type]
			$class $exportedfn -init -attachFile $f
			$place exportObjs $exportedfn
			#puts stderr "...objectified:  FN=$exportedfn cl=$class d=$dir o=$exportedfn"
			######
			set expThumbnaildir [file dirname $exportedfn]/.thumbnail
			set thumbnaildir    [file dirname $f]/.thumbnail
			if {![file isdirectory $thumbnaildir]} {
			    file mkdir $thumbnaildir
			}
			set thumbnail $thumbnaildir/[file tail $f]
			set expThumbnail $expThumbnaildir/[file tail $f]
			if {![file exists $thumbnail]} {
			    catch {exec djpeg -pnm $f | \
				       pnmscale -xscale .2 -yscale .2 | ppmquant 256 | \
				       ppmtogif > $thumbnail}
			}
			$class $expThumbnail -init -attachFile $thumbnail
			$place exportObjs $expThumbnail
			####
			append indexpage "<A href='/$exportedfn'>" \
			    "<IMG SRC='/$expThumbnail'>$exportedfn</A><br>\n"
		    } elseif {[string match *.title $exportedfn]} {
			set title [my fileContent $f]
		    } elseif {[string match *.date $exportedfn]} {
			set date <H4>[my fileContent $f]</H4>
		    }
		} elseif {[file isdirectory $f]} {
		    if {[file exists $f/.title]} {
			set desc ": [my fileContent $f/.title]"
		    } else {
			set desc ""
		    }
		    append indexpage "<A href='/$exportedfn/gindex.html'>" \
			"$exportedfn</A>$desc<br>\n"
		    my objectifyTree $place $f $exportedfn
		}
		set gindex [string trimleft $prefix/gindex.html /]
		HtmlDocument $gindex -content \
		    "<HTML><TITLE>$title</TITLE><H1>$title</H1>\
		<BODY>$date$indexpage</BODY></HTML>"
		#puts stderr "mixins of HtmlDocument=<[$gindex info mixins]>"
		$gindex mixinStrategy ::Send=TypedString
		#$gindex showVars
		receiver exportObjs $gindex
	    }
	}
    }
    GraphicDirectoryObjectifier instproc fileContent {f} {
	set FILE [open $f r]
	set content [read $FILE]
	close $FILE
	return $content
    }



    Class HtmlProxy -superclass HtmlDocument  -parameter realSubject
    HtmlProxy instproc init args {
	next
	[Place getInstance] exportObjs [self]
    }
    HtmlProxy instproc unknown {m args} {
	my instvar realSubject
	::eval $realSubject $m $args
	return [my default]
    }

    namespace export \
	WebDocument TextDocument HtmlDocument FileDocument \
	DocumentClassFactory FileDocumentClassFactory \
	DocumentFactory FileDocumentFactory \
	FileObjectifier GraphicDirectoryObjectifier \
	HtmlProxy
}

namespace import ::xotcl::actiweb::webDocument::*