addtolist action module

Called from PIE edit screen, moves item to different lists

action routine

Input: CGI data from UIG (which contains itemid and list ids *)
Output: Prints http location to return user to edit page

List ids are parameters in the CGI data with keys of the form listid.[id] (or
newlist.[pageid] for a new list) and value "on" if item is intended to be in
this list 

PDL

Foreach parameter
    If parameter has key of form listid.[id] and value is "on"
    	Push into array of lists_to_put_item_in
    If parameter has key of form newlist.[pageid]
    	If value is not "Enter new list name"
	    Store value in newlists hash with key pageid
Get information about item from item table
Call onerror unless item defined
Get information about pages that can be edited by user from item, groups,
userdata and editgroups tables
Foreach editable page
    Get information about lists on this page from item table
    Foreach list
    	Delete items which match title of selected item and are children of list
	from item, viewitem, readgroups and editgroups tables
	Foreach list_to_put_item_in
	    If list = list_to_put_item_in
	    	Call put_item_on routine(list,item)
    If defined newlists{page}
    	Call createlist routine to add new list to page
	Call put_item_on routine(newlist,item)
Want to ignore response and go directly to edit page (because want to rerun edit
action to configure edit forms)
Print http location command with appropriate URL
Exit 0

put_item_on routine

Makes item a child of list

Input: listid, item (structured variable containing details of item)
Output: itemid of newly added item

PDL

Call get_new_itemid to get itemid for item
Call get_posno to get position in list
Insert item details into item table
Insert item details into readgroups,editgroups tables
Return itemid