# packages/file-storage/www/download/index.vuh

ad_page_contract {

    Virtual URL handler for file downloads

    @author Kevin Scaldeferri (kevin@arsdigita.com)
    @author Don Baccus (simplified it by using cr utility)
    @creation-date 18 December 2000
    @cvs-id $Id: index.vuh,v 1.1 2010/08/31 21:30:45 alvaror Exp $
} {
    file_id:integer,optional
    version_id:integer,optional
} -validate {
    either_one {
    if { ! [info exists file_id] && ! [info exists version_id] } {
        ad_complain "Either file_id or version_id must exist"
    }
    }
}

if {![exists_and_not_null version_id] && [info exists file_id]} {
    set version_id [item::get_live_revision $file_id]
}
if { ![exists_and_not_null file_id] && [info exists version_id] } {
    set file_id [content::revision::item_id -revision_id $version_id]
}

set user_id [ad_conn user_id]
permission::require_permission -party_id $user_id -object_id $version_id -privilege read

if {[apm_package_installed_p views]} {
    views::record_view -object_id $file_id -viewer_id $user_id
}

cr_write_content -revision_id $version_id