X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/ad2c77dd3076568024a28b485afbf82c3508d448..62462ca5fbf273549f00a7936b10898cb611c528:/doc/plugins/write.mdwn

diff --git a/doc/plugins/write.mdwn b/doc/plugins/write.mdwn
index 8492b1756..6c475024a 100644
--- a/doc/plugins/write.mdwn
+++ b/doc/plugins/write.mdwn
@@ -30,6 +30,16 @@ hook, a "id" paramter, which should be a unique string for this plugin, and
 a "call" parameter, which is a reference to a function to call for the
 hook.
 
+An optional "scan" parameter, if set to a true value, makes the hook be
+called during the preliminary scan that ikiwiki makes of updated pages,
+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.
@@ -64,6 +74,14 @@ Runs on the raw source of a page, before anything else touches it, and can
 make arbitrary changes. The function is passed named parameters `page` and
 `content` and should return the filtered content.
 
+### scan
+
+	hook(type => "scan", id => "foo", call => \&scan);
+
+This is identical to a preprocess hook (see below), except that it is
+called in the initial pass that scans pages for data that will be used in
+later passes. Scan hooks are the only hook that should modify 
+
 ### preprocess
 
 Adding a [[PreProcessorDirective]] is probably the most common use of a
@@ -105,13 +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.
@@ -161,6 +179,41 @@ called in turn, and passed a CGI object. The hook should examine the
 parameters, and if it will handle this CGI request, output a page and
 terminate the program.
 
+### 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
+auth hook is called in turn, and passed a CGI object and a session object. 
+
+If the hook is able to authenticate the user, it should set the session
+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);
@@ -232,8 +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($)`
@@ -329,6 +382,10 @@ path to the first file found.
 
 Given a time, formats it for display.
 
+#### `gettext`
+
+This is the standard gettext function, although slightly optimised.
+
 ## RCS plugins
 
 ikiwiki's support for revision control systems also uses pluggable perl