* Add "last" parameter to hook function. Very basic ordering, and hopefully

  nothing more spohisticated will be needed.
* Add formbuilder_setup and formbuilder hooks.
* Split out a passwordauth module, that holds all the traditional password
  based authentication etc code. It's enabled by default, but can be disabled
  if you want only openid or some other auth method.

9 files changed, 182 insertions, 227 deletions

diff --git a/IkiWiki.pm b/IkiWiki.pm
index 15f7bcec0..703b596a8 100644
--- a/IkiWiki.pm
+++ b/IkiWiki.pm
@@ -62,7 +62,7 @@ sub defaultconfig () { #{{{
 	setup => undef,
 	adminuser => undef,
 	adminemail => undef,
-	plugin => [qw{mdwn inline htmlscrubber}],
+	plugin => [qw{mdwn inline htmlscrubber passwordauth}],
 	timeformat => '%c',
 	locale => undef,
 	sslcookie => 0,
@@ -663,7 +663,15 @@ sub run_hooks ($$) { # {{{
 	my $sub=shift;
 
 	if (exists $hooks{$type}) {
+		my @deferred;
 		foreach my $id (keys %{$hooks{$type}}) {
+			if ($hooks{$type}{$id}{last}) {
+				push @deferred, $id;
+				next;
+			}
+			$sub->($hooks{$type}{$id}{call});
+		}
+		foreach my $id (@deferred) {
 			$sub->($hooks{$type}{$id}{call});
 		}
 	}
diff --git a/IkiWiki/CGI.pm b/IkiWiki/CGI.pm
index 14861e398..e1cb83b49 100644
--- a/IkiWiki/CGI.pm
+++ b/IkiWiki/CGI.pm
@@ -127,16 +127,9 @@ sub cgi_signin ($$) { #{{{
 	error($@) if $@;
 	my $form = CGI::FormBuilder->new(
 		title => "signin",
-		fields => [qw(do name password openid_url)],
 		header => 1,
 		charset => "utf-8",
 		method => 'POST',
-		validate => {
-			confirm_password => {
-				perl => q{eq $form->field("password")},
-			},
-			email => 'EMAIL',
-		},
 		required => 'NONE',
 		javascript => 0,
 		params => $q,
@@ -146,170 +139,32 @@ sub cgi_signin ($$) { #{{{
 			     {template_params("signin.tmpl")} : ""),
 		stylesheet => baseurl()."style.css",
 	);
-		
-	decode_form_utf8($form);
+	my $buttons=["Login"];
 	
-	$form->field(name => "name", required => 0, size => 30);
 	$form->field(name => "do", type => "hidden");
-	$form->field(name => "password", type => "password", required => 0);
-	if ($config{openid}) {
-		$form->field(name => "openid_url", label => "OpenID", size => 30,
-			comment => '('.
-				htmllink("", "", "OpenID", 1, 0, "What's this?")
-				.($config{openidsignup} ? " | <a href=\"$config{openidsignup}\">Get an OpenID</a>" : "")
-				.')');
-	}
-	else {
-		$form->field(name => "openid_url", type => "hidden");
-	}
-	if ($form->submitted eq "Register" || $form->submitted eq "Create Account") {
-		$form->title("register");
-		$form->text("");
-		$form->fields(qw(do name password confirm_password email));
-		$form->field(name => "confirm_password", type => "password");
-		$form->field(name => "email", type => "text");
-		$form->field(name => "openid_url", type => "hidden");
-	}
+	
 	if ($q->param("do") ne "signin" && !$form->submitted) {
 		$form->text("You need to log in first.");
 	}
 	
-	if ($form->submitted) {
-		my $submittype=$form->submitted;
-		# OpenID login uses the Login button, but validates
-		# differently.
-		if ($submittype eq "Login" && $config{openid} && 
-		    length $form->field("openid_url")) {
-			$submittype="OpenID";
-			
-			$form->field(
-				name => "openid_url",
-				validate => sub {
-					# FIXME: ugh
-					IkiWiki::Plugin::openid::validate($q, $session, shift, $form);
-				},
-			);
-		}
-
-		# Set required fields based on how form was submitted.
-		my %required=(
-			"Login" => [qw(name password)],
-			"Register" => [],
-			"Create Account" => [qw(name password confirm_password email)],
-			"Mail Password" => [qw(name)],
-			"OpenID" => [qw(openid_url)],
-		);
-		foreach my $opt (@{$required{$submittype}}) {
-			$form->field(name => $opt, required => 1);
-		}
+	run_hooks(formbuilder_setup => sub {
+		shift->(form => $form, cgi => $q, session => $session);
+	});
 	
-		# Validate password differently depending on how
-		# form was submitted.
-		if ($submittype eq 'Login') {
-			$form->field(
-				name => "password",
-				validate => sub {
-					length $form->field("name") &&
-					shift eq userinfo_get($form->field("name"), 'password');
-				},
-			);
-			$form->field(name => "name", validate => '/^\w+$/');
-		}
-		elsif ($submittype ne 'OpenID') {
-			$form->field(name => "password", validate => 'VALUE');
-		}
-		# And make sure the entered name exists when logging
-		# in or sending email, and does not when registering.
-		if ($submittype eq 'Create Account' ||
-		    $submittype eq 'Register') {
-			$form->field(
-				name => "name",
-				validate => sub {
-					my $name=shift;
-					length $name &&
-					$name=~/$config{wiki_file_regexp}/ &&
-					! userinfo_get($name, "regdate");
-				},
-			);
-		}
-		elsif ($submittype ne 'OpenID') {
-			$form->field(
-				name => "name",
-				validate => sub {
-					my $name=shift;
-					length $name &&
-					userinfo_get($name, "regdate");
-				},
-			);
-		}
-	}
-	else {
-		# First time settings.
-		$form->field(name => "name", comment => "use FirstnameLastName");
-		if ($session->param("name")) {
-			$form->field(name => "name", value => $session->param("name"));
-		}
-	}
+	decode_form_utf8($form);
 
-	if ($form->submitted && $form->validate) {
-		if ($form->submitted eq 'Login') {
-			$session->param("name", $form->field("name"));
-			cgi_postsignin($q, $session);
-		}
-		elsif ($form->submitted eq 'Create Account') {
-			my $user_name=$form->field('name');
-			if (userinfo_setall($user_name, {
-				           'email' => $form->field('email'),
-				           'password' => $form->field('password'),
-				           'regdate' => time
-				         })) {
-				$form->field(name => "confirm_password", type => "hidden");
-				$form->field(name => "email", type => "hidden");
-				$form->text("Account creation successful. Now you can Login.");
-				printheader($session);
-				print misctemplate($form->title, $form->render(submit => ["Login"]));
-			}
-			else {
-				error("Error creating account.");
-			}
-		}
-		elsif ($form->submitted eq 'Mail Password') {
-			my $user_name=$form->field("name");
-			my $template=template("passwordmail.tmpl");
-			$template->param(
-				user_name => $user_name,
-				user_password => userinfo_get($user_name, "password"),
-				wikiurl => $config{url},
-				wikiname => $config{wikiname},
-				REMOTE_ADDR => $ENV{REMOTE_ADDR},
-			);
-			
-			eval q{use Mail::Sendmail};
-			error($@) if $@;
-			sendmail(
-				To => userinfo_get($user_name, "email"),
-				From => "$config{wikiname} admin <$config{adminemail}>",
-				Subject => "$config{wikiname} information",
-				Message => $template->output,
-			) or error("Failed to send mail");
-			
-			$form->text("Your password has been emailed to you.");
-			$form->field(name => "name", required => 0);
-			printheader($session);
-			print misctemplate($form->title, $form->render(submit => ["Login", "Mail Password"]));
-		}
-		elsif ($form->submitted eq "Register") {
-			printheader($session);
-			print misctemplate($form->title, $form->render(submit => ["Create Account"]));
-		}
-	}
-	elsif ($form->submitted eq "Create Account") {
-		printheader($session);
-		print misctemplate($form->title, $form->render(submit => ["Create Account"]));
+	if (exists $hooks{formbuilder}) {
+		run_hooks(formbuilder => sub {
+			shift->(form => $form, cgi => $q, session => $session,
+				buttons => $buttons);
+		});
 	}
 	else {
+		if ($form->submitted) {
+			$form->validate;
+		}
 		printheader($session);
-		print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
+		print misctemplate($form->title, $form->render(submit => $buttons));
 	}
 } #}}}
 
@@ -338,15 +193,10 @@ sub cgi_prefs ($$) { #{{{
 	error($@) if $@;
 	my $form = CGI::FormBuilder->new(
 		title => "preferences",
-		fields => [qw(do name password confirm_password email 
-		              subscriptions locked_pages)],
 		header => 0,
 		charset => "utf-8",
 		method => 'POST',
 		validate => {
-			confirm_password => {
-				perl => q{eq $form->field("password")},
-			},
 			email => 'EMAIL',
 		},
 		required => 'NONE',
@@ -357,30 +207,26 @@ sub cgi_prefs ($$) { #{{{
 			     {template_params("prefs.tmpl")} : ""),
 		stylesheet => baseurl()."style.css",
 	);
-	my @buttons=("Save Preferences", "Logout", "Cancel");
+	my $buttons=["Save Preferences", "Logout", "Cancel"];
+
+	run_hooks(formbuilder_setup => sub {
+		shift->(form => $form, cgi => $q, session => $session);
+	});
 	
-	my $user_name=$session->param("name");
 	$form->field(name => "do", type => "hidden");
-	$form->field(name => "name", disabled => 1,
-		value => $user_name, force => 1, size => 30);
-	$form->field(name => "password", type => "password");
-	$form->field(name => "confirm_password", type => "password");
+	$form->field(name => "email", size => 50);
 	$form->field(name => "subscriptions", size => 50,
 		comment => "(".htmllink("", "", "PageSpec", 1).")");
 	$form->field(name => "locked_pages", size => 50,
 		comment => "(".htmllink("", "", "PageSpec", 1).")");
 	$form->field(name => "banned_users", size => 50);
 	
+	my $user_name=$session->param("name");
 	if (! is_admin($user_name)) {
 		$form->field(name => "locked_pages", type => "hidden");
 		$form->field(name => "banned_users", type => "hidden");
 	}
 
-	if ($config{httpauth}) {
-		$form->field(name => "password", type => "hidden");
-		$form->field(name => "confirm_password", type => "hidden");
-	}
-	
 	if (! $form->submitted) {
 		$form->field(name => "email", force => 1,
 			value => userinfo_get($user_name, "email"));
@@ -406,8 +252,8 @@ sub cgi_prefs ($$) { #{{{
 		return;
 	}
 	elsif ($form->submitted eq "Save Preferences" && $form->validate) {
-		foreach my $field (qw(password email subscriptions locked_pages)) {
-			if (length $form->field($field)) {
+		foreach my $field (qw(email subscriptions locked_pages)) {
+			if (defined $form->field($field) && length $form->field($field)) {
 				userinfo_set($user_name, $field, $form->field($field)) || error("failed to set $field");
 			}
 		}
@@ -418,8 +264,16 @@ sub cgi_prefs ($$) { #{{{
 		$form->text("Preferences saved.");
 	}
 	
-	printheader($session);
-	print misctemplate($form->title, $form->render(submit => \@buttons));
+	if (exists $hooks{formbuilder}) {
+		run_hooks(formbuilder => sub {
+			shift->(form => $form, cgi => $q, session => $session,
+				buttons => $buttons);
+		});
+	}
+	else {
+		printheader($session);
+		print misctemplate($form->title, $form->render(submit => $buttons));
+	}
 } #}}}
 
 sub cgi_editpage ($$) { #{{{
@@ -454,6 +308,10 @@ sub cgi_editpage ($$) { #{{{
 		template => $renderer,
 	);
 	
+	run_hooks(formbuilder_setup => sub {
+		shift->(form => $form, cgi => $q, session => $session);
+	});
+	
 	decode_form_utf8($form);
 	
 	# This untaint is safe because titlepage removes any problematic
diff --git a/IkiWiki/Plugin/openid.pm b/IkiWiki/Plugin/openid.pm
index 43ce8fd31..7ea67c5ca 100644
--- a/IkiWiki/Plugin/openid.pm
+++ b/IkiWiki/Plugin/openid.pm
@@ -8,8 +8,9 @@ use IkiWiki;
 
 sub import { #{{{
 	hook(type => "getopt", id => "openid", call => \&getopt);
-	hook(type => "checkconfig", id => "openid", call => \&checkconfig);
 	hook(type => "auth", id => "openid", call => \&auth);
+	hook(type => "formbuilder_setup", id => "openid",
+		call => \&formbuilder_setup, last => 1);
 } # }}}
 
 sub getopt () { #{{{
@@ -19,37 +20,43 @@ sub getopt () { #{{{
 	GetOptions("openidsignup=s" => \$config{openidsignup});
 } #}}}
 
-sub checkconfig () { #{{{
-	# Currently part of the OpenID code is in CGI.pm, and is enabled by
-	# this setting.
-	# TODO: modularise it all out into this plugin..
-	$config{openid}=1;
-} #}}}
-
-sub auth ($$) { #{{{
-	my $q=shift;
-	my $session=shift;
-
-	if (defined $q->param('openid.mode')) {
-		my $csr=getobj($q, $session);
-
-		if (my $setup_url = $csr->user_setup_url) {
-			IkiWiki::redirect($q, $setup_url);
+sub formbuilder_setup (@) { #{{{
+	my %params=@_;
+
+	my $form=$params{form};
+	my $session=$params{session};
+	my $cgi=$params{cgi};
+
+	if ($form->title eq "signin") {
+ 		$form->field(
+			name => "openid_url",
+			label => "OpenID",
+			size => 30,
+			comment => '('.
+				htmllink("", "", "OpenID", 1, 0, "What's this?")
+				.($config{openidsignup} ? " | <a href=\"$config{openidsignup}\">Get an OpenID</a>" : "")
+				.')'
+		);
+
+		# Handle submission of an OpenID as validation.
+		if ($form->submitted && $form->submitted eq "Login" &&
+		    defined $form->field("openid_url") && 
+		    length $form->field("openid_url")) {
+			$form->field(
+				name => "openid_url",
+				validate => sub {
+					validate($cgi, $session, shift, $form);
+				},
+			);
+			# Skip all other required fields in this case.
+			foreach my $field ($form->field) {
+				next if $field eq "openid_url";
+				$form->field(name => $field, required => 0,
+					validate => '/.*/');
+			}
 		}
-		elsif ($csr->user_cancel) {
-			IkiWiki::redirect($q, $config{url});
-		}
-		elsif (my $vident = $csr->verified_identity) {
-			$session->param(name => $vident->url);
-		}
-		else {
-			error("OpenID failure: ".$csr->err);
-		}
-	}
-	elsif (defined $q->param('openid_identifier')) {
-		validate($q, $session, $q->param('openid_identifier'));
 	}
-} #}}}
+}
 
 sub validate ($$$;$) { #{{{
 	my $q=shift;
@@ -77,11 +84,37 @@ sub validate ($$$;$) { #{{{
 		delayed_return => 1,
 	);
 	# Redirect the user to the OpenID server, which will
-	# eventually bounce them back to auth() above.
+	# eventually bounce them back to auth()
 	IkiWiki::redirect($q, $check_url);
 	exit 0;
 } #}}}
 
+sub auth ($$) { #{{{
+	my $q=shift;
+	my $session=shift;
+
+	if (defined $q->param('openid.mode')) {
+		my $csr=getobj($q, $session);
+
+		if (my $setup_url = $csr->user_setup_url) {
+			IkiWiki::redirect($q, $setup_url);
+		}
+		elsif ($csr->user_cancel) {
+			IkiWiki::redirect($q, $config{url});
+		}
+		elsif (my $vident = $csr->verified_identity) {
+			$session->param(name => $vident->url);
+		}
+		else {
+			error("OpenID failure: ".$csr->err);
+		}
+	}
+	elsif (defined $q->param('openid_identifier')) {
+		# myopenid.com affiliate support
+		validate($q, $session, $q->param('openid_identifier'));
+	}
+} #}}}
+
 sub getobj ($$) { #{{{
 	my $q=shift;
 	my $session=shift;
diff --git a/IkiWiki/Plugin/skeleton.pm b/IkiWiki/Plugin/skeleton.pm
index f3244ae14..feb0f7419 100644
--- a/IkiWiki/Plugin/skeleton.pm
+++ b/IkiWiki/Plugin/skeleton.pm
@@ -21,6 +21,8 @@ sub import { #{{{
 	hook(type => "change", id => "skeleton", call => \&change);
 	hook(type => "cgi", id => "skeleton", call => \&cgi);
 	hook(type => "auth", id => "skeleton", call => \&auth);
+	hook(type => "formbuilder_setup", id => "skeleton", call => \&formbuilder_setup);
+	hook(type => "formbuilder", id => "skeleton", call => \&formbuilder);
 	hook(type => "savestate", id => "savestate", call => \&savestate);
 } # }}}
 
@@ -103,6 +105,18 @@ sub auth ($$) { #{{{
 	debug("skeleton plugin running in auth");
 } #}}}
 
+sub formbuilder_setup (@) { #{{{
+	my %params=@_;
+	
+	debug("skeleton plugin running in formbuilder_setup");
+} # }}}
+
+sub formbuilder (@) { #{{{
+	my %params=@_;
+	
+	debug("skeleton plugin running in formbuilder");
+} # }}}
+
 sub savestate () { #{{{
 	debug("skeleton plugin running in savestate");
 } #}}}
diff --git a/debian/changelog b/debian/changelog
index b622fa006..b6f397f27 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -14,8 +14,14 @@ ikiwiki (1.34) UNRELEASED; urgency=low
   * Add optional "desc" parameter to shortcut definitions.
   * Avoid locking the wiki at all when handling some basic cgi stuff
     (searches, recentchanges).
-
- -- Joey Hess <joeyh@debian.org>  Mon, 20 Nov 2006 06:54:12 -0500
+  * Add "last" parameter to hook function. Very basic ordering, and hopefully
+    nothing more spohisticated will be needed.
+  * Add formbuilder_setup and formbuilder hooks.
+  * Split out a passwordauth module, that holds all the traditional password
+    based authentication etc code. It's enabled by default, but can be disabled
+    if you want only openid or some other auth method.
+
+ -- Joey Hess <joeyh@debian.org>  Mon, 20 Nov 2006 09:17:07 -0500
 
 ikiwiki (1.33) unstable; urgency=low
 
diff --git a/doc/ikiwiki.setup b/doc/ikiwiki.setup
index 7d0eb71fe..c6aa08ddd 100644
--- a/doc/ikiwiki.setup
+++ b/doc/ikiwiki.setup
@@ -97,7 +97,7 @@ use IkiWiki::Setup::Standard {
 	#                   wikitext camelcase pagestats htmltidy fortune
 	#                   sidebar map rst toc linkmap openid}],
 	# If you want to disable any of the default plugins, list them here.
-	#disable_plugins => [qw{inline htmlscrubber}],
+	#disable_plugins => [qw{inline htmlscrubber passwordauth}],
 
 	# For use with the tag plugin, make all tags be located under a
 	# base page.
diff --git a/doc/plugins.mdwn b/doc/plugins.mdwn
index 6de17adc7..cd6037c2b 100644
--- a/doc/plugins.mdwn
+++ b/doc/plugins.mdwn
@@ -7,9 +7,10 @@ wiki, or just have [[type/fun]].
 There's documentation if you want to [[write]] your own plugins, or you can
 install and use plugins contributed by others. 
 
-The [[mdwn]], [[inline]], and [[htmlscrubber]] plugins are enabled by default.
-To enable other plugins, use the `--plugin` switch described in [[usage]],
-or the equivalent `add_plugins` line in [[ikiwiki.setup]].
+The [[mdwn]], [[inline]], [[htmlscrubber]], and [[passwordauth]] plugins
+are enabled by default. To enable other plugins, use the `--plugin` switch
+described in [[usage]], or the equivalent `add_plugins` line in
+[[ikiwiki.setup]].
 
 # Plugin directory
 
diff --git a/doc/plugins/passwordauth.mdwn b/doc/plugins/passwordauth.mdwn
new file mode 100644
index 000000000..aded8829f
--- /dev/null
+++ b/doc/plugins/passwordauth.mdwn
@@ -0,0 +1,9 @@
+[[template id=plugin name=passwordauth core=1 included=1 author="[[Joey]]"]]
+[[tag type/auth]]
+
+This plugin lets ikiwiki prompt for a user name and password when logging
+into the wiki. It also handles registering users, mailing passwords, and
+changing passwords in the prefs page.
+
+It is enabled by default, but can be turned off if you want to only use
+some other form of authentication, such as [[openid]].
diff --git a/doc/plugins/write.mdwn b/doc/plugins/write.mdwn
index 651023701..f808d2e1e 100644
--- a/doc/plugins/write.mdwn
+++ b/doc/plugins/write.mdwn
@@ -36,6 +36,10 @@ before begining to render pages. This parameter should be set to true if
 the hook modifies data in `%links`. Note that doing so will make the hook
 be run twice per page build, so avoid doing it for expensive hooks.
 
+An optional "last" parameter, if set to a true value, makes the hook run
+after all other hooks of its type. Useful if the hook depends on some other
+hook being run first.
+
 ## Types of hooks
 
 In roughly the order they are called.
@@ -119,13 +123,13 @@ return the htmlized content.
 
 	hook(type => "pagetemplate", id => "foo", call => \&pagetemplate);
 
-[[Templates]] are filled out for many different things in ikiwiki, 
-like generating a page, or part of a blog page, or an rss feed, or a cgi.
-This hook allows modifying those templates. The function is passed named
+[[Templates]] are filled out for many different things in ikiwiki, like
+generating a page, or part of a blog page, or an rss feed, or a cgi. This
+hook allows modifying those templates. The function is passed named
 parameters. The "page" and "destpage" parameters are the same as for a
-preprocess hook. The "template" parameter is a `HTML::Template` object that
-is the template that will be used to generate the page. The function can
-manipulate that template object.
+preprocess hook. The "template" parameter is a [[cpan HTML::Template]]
+object that is the template that will be used to generate the page. The
+function can manipulate that template object.
 
 The most common thing to do is probably to call $template->param() to add
 a new custom parameter to the template.
@@ -177,7 +181,7 @@ terminate the program.
 
 ### auth
 
-	hook(type => "cgi", id => "foo", call => \&auth);
+	hook(type => "auth", id => "foo", call => \&auth);
 
 This hook can be used to implement a different authentication method than
 the standard web form. When a user needs to be authenticated, each registered
@@ -188,6 +192,28 @@ object's "name" parameter to the authenticated user's name. Note that
 if the name is set to the name of a user who is not registered,
 a basic registration of the user will be automatically performed.
 
+### formbuilder
+
+	hook(type => "formbuilder_setup", id => "foo", call => \&formbuilder_setup);
+	hook(type => "formbuilder", id => "foo", call => \&formbuilder);
+
+These hooks allow tapping into the parts of ikiwiki that use [[cpan
+CGI::FormBuilder]] to generate web forms. These hooks are passed named
+parameters: `cgi`, `session`, and `form`. These are, respectively, the
+`CGI` object, the user's `CGI::Session`, and a `CGI::FormBuilder`.
+
+Each time a form is set up, the formbuilder_setup hook is called.
+Typically the formbuilder_setup hook will check the form's title, and if
+it's a form that it needs to modify, will call various methods to
+add/remove/change fields, tweak the validation code for the fields, etc. It
+will not validate or display the form.
+
+Form validation and display can be overridden by the formbuilder hook.
+By default, ikiwiki will do a basic validation and display of the form,
+but if this hook is registered, it will stop that and let the hook take
+over. This hook is passed an additional named parameter: `buttons` is an
+array of the submit buttons for the form.
+
 ### savestate
 
 	hook(type => "savestate", id => "foo", call => \&savestate);
@@ -259,8 +285,8 @@ appear on the wiki page, rather than calling error().
 
 #### `template($;@)`
 
-Creates and returns a HTML::Template object. The first parameter is the
-name of the file in the template directory. The optional remaining
+Creates and returns a [[cpan HTML::Template]] object. The first parameter
+is the name of the file in the template directory. The optional remaining
 parameters are passed to HTML::Template->new.
 
 #### `htmlpage($)`