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williamc |
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#
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# The base ActiveDoc generator and support utility
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# Create the appropriate object for a document given its url
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# Class type determined by <DocType class=> tag
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# Will create and return the pointer to the apporpriate object rather than
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# itself.
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#
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# Interface
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# ---------
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# new(UserQuery) : Add a new DOChandler with a UserQuery
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# UserQuery Parameters :
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# cache -> cache directory
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# UserInterface -> Set a User interface to use
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# (default is that of the UserQuery)
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#
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# newdoc(filename) : Create an Object of the appropriate type for the
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# document specified in filename
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# defaultcache() : Return the default cache location
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# inputvalue(param) : return the value of param as given by the
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# initialising UserQuery
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# asksingleinputvalue(param, string) : Query the user to supply a given input
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# value the initialising UserQuery)
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package ActiveDoc::DOChandler;
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require 5.001;
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use ActiveDoc::BaseTags;
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use ActiveDoc::ActiveDoc;
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use ActiveDoc::UserInterface_basic;
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use ActiveDoc::UserQuery;
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use ObjectStore;
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sub new {
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my $class=shift;
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my $UserQuery=shift;
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my $cache=shift;
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$self={};
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bless $self, $class;
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# set up data
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$self->{UserQuery}=$UserQuery;
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$self->{objectstore}=ObjectStore->new();
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$self->{treenode}=ActiveDoc::TreeNode->new("/"); # create a root node
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$self->{treenode}->setassociate($self);
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# set our cache area - and ask user if not
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$self->{defaultcache}=$self->inputvalue('cache');
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while ( ! defined $self->{defaultcache} ) {
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$self->asksingleinputvalue( "cache",
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"No cache directory Has Been Specified - Please enter a".
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"suitable directory to use as a cache");
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$self->{defaultcache}=$self->inputvalue('cache');
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}
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# Determine the UserInterface
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if ( ! defined $self->inputvalue('UserInterface') ) {
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$self->{UserInterface}=$self->{UserQuery}->interface();
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}
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else {
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$self->{UserInterface}=$self->inputvalue('UserInterface');
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}
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return $self;
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}
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sub newdoc {
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my $self=shift;
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my $filename=shift;
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# Set up the required service objects
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$self->{base}=BaseTags->new($filename);
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$self->{base}->{tags}->addtag("DocType", \&DocTypeTag, "", "");
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$self->{base}->{gc}->include("doctype");
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$self->{base}->{gc}->uninclude("all");
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$self->{base}->{otherself}=$self;
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# Set up a parser and parse the File
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$self->{base}->{tagfound}=0;
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$self->{base}->parse();
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if ( ! defined $self->{object} ) {
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print "No <DocType type=> Specified in $filename\n";
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exit 1;
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}
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undef $self->{base};
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return $self->{object};
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}
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sub addobj {
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my $self=shift;
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# --- Add to our local objectstore
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$self->{objectstore}->add(@_);
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# Now indicate weve found one
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$self->{object}=shift;
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}
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sub defaultcache {
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my $self=shift;
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return $self->{defaultcache};
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}
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sub inputvalue {
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my $self=shift;
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my $value=shift;
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return $self->{UserQuery}->getparam($value);
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}
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sub asksingleinputvalue {
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my $self=shift;
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my $param=shift;
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my $string=shift;
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$self->{UserQuery}->clearquery();
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$self->{UserQuery}->setquery('basic', $param, $string );
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$self->{UserQuery}->askuser();
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}
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# ------------------------------- Tag Routines --------------------------
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#
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# Check type and create object of appropriate type
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#
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# !! remember that $self refers to the base
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#
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sub DocTypeTag {
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my $self=shift;
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my $name=shift;
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my $hashref=shift;
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my $object;
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my $res;
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# - Syntax Checking
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$self->{switch}->checkparam($name, "type");
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# -- Check for default types - and convert
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if ( $$hashref{type}=~/ActiveDoc/i ) {
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$$hashref{type}="ActiveDoc::ActiveDoc";
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}
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$res = eval { eval "require $$hashref{type}"; };
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if ( ! defined $res ) {
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$self->report("Unknown Document Type : $$hashref{type}\n $@");
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}
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# --- create an object of the appropriate type
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$object=$$hashref{type}->new($self->{filename}, $self->{otherself});
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# --- store it in our Object Storage Facility
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if ( defined $object ) {
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$self->{otherself}->addobj(
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$object, $$hashref{type}, $self->{otherself}->{url} );
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}
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else {
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$self->report(
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"Unable to Initialise Object of type $$hashref{type}");
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}
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}
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