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#
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# ActiveDoc.pm
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#
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# Originally Written by Christopher Williams
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#
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# Description
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#
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# Interface
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# ---------
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# new(ActiveConfig[,options]) : A new ActiveDoc object
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# url() : Return/set the docs url - essential
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# file() : Return the local filename of document
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#
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# parse(parselabel): Parse the document file for the given parse level
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# newparse(parselabel) : Create a new parse type
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# addtag(parselabel,tagname,start,obj,text,obj,end,obj)
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# : Add tags to the parse given by label
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# checktag(tagname, hashref, param) : check for existence of param in
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# hashref from a tag call
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# includeparse(local_parsename, objparsename, activedoc) : copy the parse from
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# one object to another
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# currentparsename([name]) : get/set current parse name
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# getfile(url) : get a processedfile object given a url
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# activatedoc(url) : Return the object ref for a doc described by the given url
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# -- any parse called "init" will also be run
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# config([ActiveConfig]) : Set up/return Configuration for the document
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# basequery([ActiveConfig]) : Set up/return UserQuery for the doc
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# copydocconfig(ActiveDoc) : Copy the basic configuration from the ActiveDoc
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# copydocquery(ActiveDoc) : Copy the basicquery from the ActiveDoc
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# userinterface() : Return the defaullt userinterface
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# option(var) : return the value of the option var
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# requestoption("message") : Ask the user to supply a value for an option
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# if it dosnt already exist
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#
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# -- error methods --
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# error(string) : Report an general error to the user
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# parseerror(string) : Report an error during parsing a file
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# line() : Return the current line number of the document
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# and the ProcessedFileObj it is in
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package ActiveDoc::ActiveDoc;
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require 5.004;
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use ActiveDoc::Parse;
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use ActiveDoc::ActiveConfig;
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use ActiveDoc::PreProcessedFile;
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use ObjectUtilities::StorableObject;
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use URL::URLhandler;
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@ISA = qw(ObjectUtilities::StorableObject);
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sub new {
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my $class=shift;
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$self={};
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bless $self, $class;
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$self->config(shift);
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# have some override options been passed
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if ( @_ ) {
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$self->basequery(shift);
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}
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else {
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# --- is there a starter document?
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my $basedoc=$self->config()->basedoc();
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if ( defined $basedoc ) {
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$self->copydocquery($basedoc);
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}
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else {
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$self->error("ActiveDoc Error : No base doc found");
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}
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}
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$self->_init2();
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}
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sub _init2 {
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my $self=shift;
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# A URL handler per document
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$self->{urlhandler}=URL::URLhandler->new($self->config()->cache());
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# A default UserInterface
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$self->{userinterface}=ActiveDoc::SimpleUserInterface->new();
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$self->init(@_);
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return $self;
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}
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# ----- parse related routines --------------
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sub parse {
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my $self=shift;
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$parselabel=shift;
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my $file=$self->file();
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if ( $file ) {
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if ( exists $self->{parsers}{$parselabel} ) {
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$self->{currentparsename}=$parselabel;
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$self->{currentparser}=$self->{parsers}{$parselabel};
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$self->{parsers}{$parselabel}->parse($file,@_);
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delete $self->{currentparser};
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$self->{currentparsename}="";
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}
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}
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else {
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print "Cannot parse - file not known\n";
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}
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}
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sub currentparsename {
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my $self=shift;
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@_?$self->{currentparsename}=shift
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:$self->{currentparsename};
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}
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sub newparse {
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my $self=shift;
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my $parselabel=shift;
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$self->{parsers}{$parselabel}=ActiveDoc::Parse->new();
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$self->{parsers}{$parselabel}->addignoretags();
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$self->{parsers}{$parselabel}->addgrouptags();
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}
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sub cleartags {
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my $self=shift;
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my $parselabel=shift;
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$self->{parsers}{$parselabel}->cleartags();
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}
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sub includeparse {
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my $self=shift;
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my $parselabel=shift;
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my $remoteparselabel=shift;
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my $activedoc=shift;
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# Some error trapping
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if ( ! exists $self->{parsers}{$parselabel} ) {
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$self->error("Unknown local parse name specified");
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}
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if ( ! exists $activedoc->{parsers}{$remoteparselabel} ) {
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$self->error("Unknown parse name specified in remote obj $activedoc");
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}
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#
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my $rp=$activedoc->{parsers}{$remoteparselabel};
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$self->{parsers}{$parselabel}->includeparse($rp);
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}
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sub addtag {
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my $self=shift;
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my $parselabel=shift;
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if ( $#_ != 6 ) {
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$self->error("Incorrect addtags specification\n".
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"called with :\n@_ \n");
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}
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$self->{parsers}{$parselabel}->addtag(@_);
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}
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sub addurltags {
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my $self=shift;
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my $parselabel=shift;
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$self->{parsers}{$parselabel}->
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addtag("Base", \&Base_start, $self, "", $self,
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\&Base_end, $self);
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}
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sub url {
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my $self=shift;
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# get file & preprocess
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if ( @_ ) {$self->{File}=$self->getfile(shift)}
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$self->{File}->url();
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}
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sub copydocconfig {
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my $self=shift;
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my $ActiveDoc=shift;
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$self->config($ActiveDoc->config());
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}
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sub copydocquery {
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my $self=shift;
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my $ActiveDoc=shift;
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if ( defined $ActiveDoc->basequery() ) {
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$self->basequery($ActiveDoc->basequery());
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}
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else {
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$self->error("Cannot copy basequery - undefined");
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}
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}
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sub config {
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my $self=shift;
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@_?$self->{ActiveConfig}=shift
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: $self->{ActiveConfig};
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}
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sub basequery {
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my $self=shift;
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@_ ? $self->{Query}=shift
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: $self->{Query};
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return $self->{Query};
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}
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sub option {
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my $self=shift;
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my $param=shift;
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if ( defined $self->basequery()) {
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return $self->basequery()->getparam($param);
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}
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else {
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return $undef;
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}
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}
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sub requestoption {
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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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my $par=undef;
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if ( defined $self->basequery()) {
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$par=$self->basequery()->getparam($param);
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while ( ! defined $par ) {
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$self->basequery()->querytype( $param, "basic");
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$self->basequery()->querymessage( $param, $string);
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$self->userinterface()->askuser($self->basequery());
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$par=$self->basequery()->getparam($param);
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}
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}
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return $par;
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}
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sub getfile() {
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my $self=shift;
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my $origurl=shift;
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my $fileref;
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my ($url, $file)=$self->{urlhandler}->get($origurl);
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# do we already have an appropriate object?
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($fileref)=$self->config()->find($url);
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#undef $fileref;
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if ( defined $fileref ) {
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print "found $url in database ----\n";
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$fileref->update();
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}
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else {
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if ( $file eq "" ) {
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$self->parseerror("Unable to get $origurl");
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}
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#-- set up a new preprocess file
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print "Making a new file $url----\n";
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$fileref=ActiveDoc::PreProcessedFile->new($self->config());
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$fileref->url($url);
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$fileref->update();
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}
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return $fileref;
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}
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sub activatedoc {
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my $self=shift;
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my $url=shift;
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# first get a preprocessed copy of the file
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# my $fileob=$self->getfile($url);
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# now parse it for the <DocType> tag
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my $tempdoc=ActiveDoc::ActiveDoc->new($self->config());
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$tempdoc->{urlhandler}=$self->{urlhandler};
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my $fullurl=$tempdoc->url($url);
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$url=$fullurl;
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$tempdoc->{doctypefound}=0;
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$tempdoc->newparse("doctype");
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$tempdoc->addtag("doctype","Doc", \&Doc_Start, $tempdoc,
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"", $tempdoc, "", $tempdoc);
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$tempdoc->parse("doctype");
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if ( ! defined $tempdoc->{docobject} ) {
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print "No <Doc type=> Specified in ".$url."\n";
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exit 1;
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}
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# Set up a new object of the specified type
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eval "require $tempdoc->{docobject}";
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die $@ if $@;
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my $newobj=$tempdoc->{docobject}->new($self->config());
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undef $tempdoc;
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$newobj->url($url);
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$newobj->_initparse();
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return $newobj;
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}
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sub _initparse {
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my $self=shift;
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$self->parse("init");
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}
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# -------- Error Handling and Error services --------------
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sub error {
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my $self=shift;
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my $string=shift;
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die $string."\n";
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}
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sub parseerror {
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my $self=shift;
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my $string=shift;
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if ( ! defined $self->{currentparse} ) {
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$self->error($string);
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}
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else {
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($line, $file)=$self->line();
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print "Parse Error in ".$file->url().", line ".
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$line."\n";
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print $string."\n";
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die;
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}
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}
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sub checktag {
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my $self=shift;
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my $tagname=shift;
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my $hashref=shift;
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my $param=shift;
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if ( ! exists $$hashref{$param} ) {
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$self->parseerror("Incomplete Tag <$tagname> : $param required");
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}
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}
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sub line {
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my $self=shift;
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my ($line, $fileobj)=
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$self->{File}->realline($self->{currentparser}->line());
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return ($line, $fileobj);
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}
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sub tagstartline {
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my $self=shift;
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my ($line, $fileobj)=$self->{File}->line(
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$self->{currentparser}->tagstartline());
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return ($line, $fileobj);
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}
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sub file {
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my $self=shift;
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$self->{File}->file();
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}
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# --------------- Initialisation Methods ---------------------------
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sub init {
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# Dummy Routine - override for derived classes
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}
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# ------------------- Tag Routines -----------------------------------
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#
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# Base - for setting url bases
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#
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sub Base_start {
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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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$self->checktag($name, $hashref, 'type' );
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$self->checktag($name, $hashref, 'base' );
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# Keep track of base tags
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push @{$self->{basestack}}, $$hashref{"type"};
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# Set the base
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$self->{urlhandler}->setbase($$hashref{"type"},$hashref);
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}
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sub Base_end {
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my $self=shift;
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my $name=shift;
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my $type;
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if ( $#{$self->{basestack}} == -1 ) {
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$self->parseerror("Parse Error : unmatched </$name>");
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}
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else {
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$type = pop @{$self->{basestack}};
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$self->{urlhandler}->unsetbase($type);
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}
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}
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sub Doc_Start {
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my $self=shift;
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my $name=shift;
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my $hashref=shift;
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$self->checktag($name, $hashref, "type");
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$self->{doctypefound}++;
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if ( $self->{doctypefound} == 1 ) { # only take first doctype
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$self->{docobject}=$$hashref{'type'};
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}
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}
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sub userinterface {
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my $self=shift;
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@_?$self->{userinterface}=shift
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:$self->{userinterface}
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}
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