use base qw(Class::Accessor Class::Data::Inheritable);
use attributes ();
use Class::DBI::Loader;
+use UNIVERSAL::require;
+use Apache::Constants ":common";
use strict;
use warnings;
-
-__PACKAGE__->mk_classdata(qw( _config init_done view_object ));
-__PACKAGE__->mk_accessors ( qw( config ar params objects model_class args ));
+our $VERSION = "0.1";
+__PACKAGE__->mk_classdata($_) for qw( _config init_done view_object );
+__PACKAGE__->mk_accessors ( qw( config ar params objects model_class
+args action template ));
__PACKAGE__->config({});
__PACKAGE__->init_done(0);
+
+sub import {
+ my $real = shift;
+ if ($real ne "Apache::MVC") {
+ no strict 'refs';
+ *{$real."::handler"} = sub { Apache::MVC::handler($real, @_) };
+ }
+}
+
# This is really dirty.
sub config {
my $self = shift;
sub set_database {
my ($calling_class, $dsn) = @_;
$calling_class = ref $calling_class if ref $calling_class;
- $calling_class->config->{dsn} = $dsn;
- $calling_class->config->{loader} = Class::DBI::Loader->new(
+ my $config = $calling_class->config;
+ $config->{model} ||= "Apache::MVC::Model::CDBI";
+ $config->{model}->require;
+ $config->{dsn} = $dsn;
+ $config->{loader} = Class::DBI::Loader->new(
namespace => $calling_class,
dsn => $dsn
);
+ $config->{classes} = [ $config->{loader}->classes ];
+ for my $subclass (@{$config->{classes}}) {
+ no strict 'refs';
+ unshift @{$subclass."::ISA"}, $config->{model};
+ $config->{model}->adopt($subclass)
+ if $config->{model}->can("adopt");
+ }
}
sub init {
my $class = shift;
my $config = $class->config;
- $config->{model} ||= "Apache::MVC::Model::CDBI";
$config->{view} ||= "Apache::MVC::View::TT";
- $config->{classes} = [ $class->config->{loader}->classes ];
+ $config->{view}->require;
$config->{display_tables} ||= [ $class->config->{loader}->tables ];
- for my $class (@{$config->{classes}}) {
- no strict 'refs';
- push @{$class."::ISA"}, $class->config->{model};
- }
$class->view_object($class->config->{view}->new);
+ $class->init_done(1);
}
sub handler {
# See Apache::MVC::Workflow before trying to understand this.
- my $class = (caller(0))[0];
+ my $class = shift;
$class->init unless $class->init_done;
my $r = bless { config => $class->config }, $class;
$r->get_request();
$r->parse_location();
+
+ warn "Parsed location\n";
$r->model_class($r->class_of($r->{table}));
my $status = $r->is_applicable;
- return $status unless $status == 200;
- $status = $r->call_authenticate;
- return $status unless $status == 200;
- $r->find_objects();
- $r->additional_data();
- $r->class->process($r);
+ if ($status == OK) {
+ $status = $r->call_authenticate;
+ return $status unless $status == OK;
+ $r->additional_data();
+
+ $r->model_class->process($r);
+ } else {
+ warn "Plain template $r->{path}";
+ # Otherwise, it's just a plain template.
+ delete $r->{model_class};
+ $r->{path} =~ s{/}{}; # De-absolutify
+ $r->template($r->{path});
+ warn $r->template;
+ }
+ return $r->view_object->process($r);
}
sub get_request {
sub parse_location {
my $self = shift;
- my @pi = split /\//, $self->{ar}->uri();
+ $self->{path} = $self->{ar}->uri;
+ my $loc = $self->{ar}->location;
+ $self->{path} =~ s/^$loc//; # I shouldn't need to do this?
+ warn "Path is $self->{path}";
+ my @pi = split /\//, $self->{path};
shift @pi while @pi and !$pi[0];
$self->{table} = shift @pi;
$self->{action} = shift @pi;
$self->{args} = \@pi;
+
+ $self->{params} = { $self->{ar}->content };
}
sub is_applicable {
my $self = shift;
- require Apache::Constants;
- Apache::Constants->import(":common");
my $config = $self->config;
- my %ok = map {$_ => 1} @{$config->{displaying_tables}};
- return DECLINED() unless exists $ok{$self->{table}};
+ $config->{ok_tables} = {map {$_ => 1} @{$config->{display_tables}}};
+ warn "We don't have that table ($self->{table})"
+ unless $config->{ok_tables}{$self->{table}};
+ return DECLINED() unless exists $config->{ok_tables}{$self->{table}};
# Does the action method exist?
my $cv = $self->model_class->can($self->{action});
+ warn "We don't have that action ($self->{action})" unless $cv;
return DECLINED() unless $cv;
# Is it exported?
- my $attribs = join " ", attributes::get($cv);
- return DECLINED() unless $attribs =~ /\b(Exported|Class|Single|Multiple)\b/i;
+ $self->{method_attribs} = join " ", attributes::get($cv);
+ do { warn "$self->{action} not exported";
+ return DECLINED()
+ } unless $self->{method_attribs} =~ /\bExported\b/i;
return OK();
}
+sub call_authenticate {
+ my $self = shift;
+ return $self->model_class->authenticate($self) if
+ $self->model_class->can("authenticate");
+ return $self->authenticate();
+}
+
+sub additional_data {}
-sub authenticate { return 200 }
+sub authenticate { return OK }
1;
+
+=head1 NAME
+
+Apache::MVC - Web front end to a data source
+
+=head1 SYNOPSIS
+
+ package BeerDB;
+ use base 'Apache::MVC';
+ sub handler { Apache::MVC::handler("BeerDB", @_) }
+ BeerDB->set_database("dbi:mysql:beerdb");
+ BeerDB->config->{uri_base} = "http://your.site/";
+ BeerDB->config->{display_tables} = [qw[beer brewery pub style]];
+ # Now set up your database:
+ # has-a relationships
+ # untaint columns
+
+ 1;
+
+=haed1 DESCRIPTION
+
+A large number of web programming tasks follow the same sort of pattern:
+we have some data in a datasource, typically a relational database. We
+have a bunch of templates provided by web designers. We have a number of
+things we want to be able to do with the database - create, add, edit,
+delete records, view records, run searches, and so on. We have a web
+server which provides input from the user about what to do. Something in
+the middle takes the input, grabs the relevant rows from the database,
+performs the action, constructs a page, and spits it out.
+
+This module aims to be the most generic and extensible "something in the
+middle".
+
+An example would help explain this best. You need to add a product
+catalogue to a company's web site. Users need to list the products in
+various categories, view a page on each product with its photo and
+pricing information and so on, and there needs to be a back-end where
+sales staff can add new lines, change prices, and delete out of date
+records. So, you set up the database, provide some default templates
+for the designers to customize, and then write an Apache handler like
+this:
+
+ package MyCorp::ProductDatabase;
+ use base 'Apache::MVC';
+ __PACKAGE__->set_database("dbi:mysql:products");
+
projects / maypole.git / blobdiff