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oacs-dav-procs.tcl

Support for tDAV Tcl webDAV implementation

Location:
packages/oacs-dav/tcl/oacs-dav-procs.tcl
Created:
2003-09-11
Author:
Dave Bauer <dave@thedesignexperience.org>
CVS Identification:
$Id: oacs-dav-procs.tcl,v 1.24.2.10 2023/07/10 09:41:44 gustafn Exp $

Procedures in this file

Detailed information

oacs_dav::authorize (public)

 oacs_dav::authorize [ args... ]

check is user_id has permission to perform the WebDAV method on the URI

Partial Call Graph (max 5 caller/called nodes):
%3 oacs_dav::conn oacs_dav::conn (public) oacs_dav::conn_setup oacs_dav::conn_setup (public) permission::permission_p permission::permission_p (public) security::RestrictLoginToSSLP security::RestrictLoginToSSLP (public) security::secure_conn_p security::secure_conn_p (public) oacs_dav::authorize oacs_dav::authorize oacs_dav::authorize->oacs_dav::conn oacs_dav::authorize->oacs_dav::conn_setup oacs_dav::authorize->permission::permission_p oacs_dav::authorize->security::RestrictLoginToSSLP oacs_dav::authorize->security::secure_conn_p

Testcases:
No testcase defined.

oacs_dav::children_have_permission_p (public)

 oacs_dav::children_have_permission_p [ -user_id user_id ] \
    [ -item_id item_id ] [ -privilege privilege ]

Check permission on child items of item_id for user_id with privilege

Switches:
-user_id (optional)
-item_id (optional)
-privilege (optional)
Returns:
returns 0 if user does not have privilege over all children otherwise return 1

Partial Call Graph (max 5 caller/called nodes):
%3 test_oacs_dav_children_have_permission_p oacs_dav_children_have_permission_p (test oacs-dav) oacs_dav::children_have_permission_p oacs_dav::children_have_permission_p test_oacs_dav_children_have_permission_p->oacs_dav::children_have_permission_p db_string db_string (public) oacs_dav::children_have_permission_p->db_string oacs_dav::impl::content_folder::copy oacs_dav::impl::content_folder::copy (private) oacs_dav::impl::content_folder::copy->oacs_dav::children_have_permission_p oacs_dav::impl::content_folder::delete oacs_dav::impl::content_folder::delete (private) oacs_dav::impl::content_folder::delete->oacs_dav::children_have_permission_p oacs_dav::impl::content_folder::move oacs_dav::impl::content_folder::move (private) oacs_dav::impl::content_folder::move->oacs_dav::children_have_permission_p

Testcases:
oacs_dav_children_have_permission_p

oacs_dav::conn (public)

 oacs_dav::conn [ args... ]

shared data for WebDAV requests

Partial Call Graph (max 5 caller/called nodes):
%3 test_oacs_dav_mkcol oacs_dav_mkcol (test oacs-dav) oacs_dav::conn oacs_dav::conn test_oacs_dav_mkcol->oacs_dav::conn test_oacs_dav_put oacs_dav_put (test oacs-dav) test_oacs_dav_put->oacs_dav::conn ad_conn ad_conn (public) oacs_dav::conn->ad_conn fs::impl::fs_object::mkcol fs::impl::fs_object::mkcol (private) fs::impl::fs_object::mkcol->oacs_dav::conn fs::impl::fs_object::put fs::impl::fs_object::put (private) fs::impl::fs_object::put->oacs_dav::conn oacs_dav::authorize oacs_dav::authorize (public) oacs_dav::authorize->oacs_dav::conn oacs_dav::conn_setup oacs_dav::conn_setup (public) oacs_dav::conn_setup->oacs_dav::conn oacs_dav::handle_request oacs_dav::handle_request (public) oacs_dav::handle_request->oacs_dav::conn

Testcases:
oacs_dav_put, oacs_dav_mkcol

oacs_dav::conn_setup (public)

 oacs_dav::conn_setup

Setup oacs_dav::conn, authenticate user

Partial Call Graph (max 5 caller/called nodes):
%3 oacs_dav::authorize oacs_dav::authorize (public) oacs_dav::conn_setup oacs_dav::conn_setup oacs_dav::authorize->oacs_dav::conn_setup ad_conn ad_conn (public) oacs_dav::conn_setup->ad_conn db_exec_plsql db_exec_plsql (public) oacs_dav::conn_setup->db_exec_plsql oacs_dav::conn oacs_dav::conn (public) oacs_dav::conn_setup->oacs_dav::conn oacs_dav::item_parent_folder_id oacs_dav::item_parent_folder_id (public) oacs_dav::conn_setup->oacs_dav::item_parent_folder_id oacs_dav::request_folder_id oacs_dav::request_folder_id (public) oacs_dav::conn_setup->oacs_dav::request_folder_id

Testcases:
No testcase defined.

oacs_dav::folder_enabled (public)

 oacs_dav::folder_enabled [ -folder_id folder_id ]
Switches:
-folder_id (optional)
Returns:
t if folder is webdav enabled, f if not

Partial Call Graph (max 5 caller/called nodes):
%3 fs::webdav_url fs::webdav_url (public) oacs_dav::folder_enabled oacs_dav::folder_enabled fs::webdav_url->oacs_dav::folder_enabled db_string db_string (public) oacs_dav::folder_enabled->db_string

Testcases:
No testcase defined.

oacs_dav::handle_request (public)

 oacs_dav::handle_request [ args... ]

dispatch request to the proper service contract implementation

Partial Call Graph (max 5 caller/called nodes):
%3 acs_sc::invoke acs_sc::invoke (public) acs_sc_binding_exists_p acs_sc_binding_exists_p (public) apm_package_key_from_id apm_package_key_from_id (public) content::item::get_content_type content::item::get_content_type (public) db_string db_string (public) oacs_dav::handle_request oacs_dav::handle_request oacs_dav::handle_request->acs_sc::invoke oacs_dav::handle_request->acs_sc_binding_exists_p oacs_dav::handle_request->apm_package_key_from_id oacs_dav::handle_request->content::item::get_content_type oacs_dav::handle_request->db_string

Testcases:
No testcase defined.

oacs_dav::impl::content_folder::head (public)

 oacs_dav::impl::content_folder::head

HEAD DAV method for content folders can't get a folder

Partial Call Graph (max 5 caller/called nodes):
%3

Testcases:
No testcase defined.

oacs_dav::item_parent_folder_id (public)

 oacs_dav::item_parent_folder_id uri

get the folder_id of the parent of an item from the uri

Parameters:
uri (required)
Returns:
parent_folder_id or empty string if folder does not exist

Partial Call Graph (max 5 caller/called nodes):
%3 fs::impl::fs_object::mkcol fs::impl::fs_object::mkcol (private) oacs_dav::item_parent_folder_id oacs_dav::item_parent_folder_id fs::impl::fs_object::mkcol->oacs_dav::item_parent_folder_id fs::impl::fs_object::put fs::impl::fs_object::put (private) fs::impl::fs_object::put->oacs_dav::item_parent_folder_id oacs_dav::conn_setup oacs_dav::conn_setup (public) oacs_dav::conn_setup->oacs_dav::item_parent_folder_id oacs_dav::impl::content_folder::mkcol oacs_dav::impl::content_folder::mkcol (private) oacs_dav::impl::content_folder::mkcol->oacs_dav::item_parent_folder_id oacs_dav::impl::content_folder::move oacs_dav::impl::content_folder::move (private) oacs_dav::impl::content_folder::move->oacs_dav::item_parent_folder_id db_exec_plsql db_exec_plsql (public) oacs_dav::item_parent_folder_id->db_exec_plsql oacs_dav::request_folder_id oacs_dav::request_folder_id (public) oacs_dav::item_parent_folder_id->oacs_dav::request_folder_id oacs_dav::request_site_node oacs_dav::request_site_node (public) oacs_dav::item_parent_folder_id->oacs_dav::request_site_node

Testcases:
No testcase defined.

oacs_dav::register_folder (public)

 oacs_dav::register_folder [ -enabled_p enabled_p ] folder_id node_id

add a uri to dav support

Switches:
-enabled_p (optional, defaults to "t")
Parameters:
folder_id (required)
node_id (required)
Register a root WebDAV enabled folder for a site node_id All requests that resolve to this site node id will be checked for WebDAV content using this folder as the root. Only one folder per node_id can be registered.

Partial Call Graph (max 5 caller/called nodes):
%3 test_oacs_dav_mkcol oacs_dav_mkcol (test oacs-dav) oacs_dav::register_folder oacs_dav::register_folder test_oacs_dav_mkcol->oacs_dav::register_folder test_oacs_dav_put oacs_dav_put (test oacs-dav) test_oacs_dav_put->oacs_dav::register_folder db_dml db_dml (public) oacs_dav::register_folder->db_dml db_transaction db_transaction (public) oacs_dav::register_folder->db_transaction fs::after_mount fs::after_mount (private) fs::after_mount->oacs_dav::register_folder

Testcases:
oacs_dav_put, oacs_dav_mkcol

oacs_dav::request_folder_id (public)

 oacs_dav::request_folder_id node_id

resolves a node_id to a DAV enabled folder_id

Parameters:
node_id (required)
site node_id of request
Returns:
folder_id, or empty string if no folder exists in dav_package_folder_map for this node_id

Partial Call Graph (max 5 caller/called nodes):
%3 oacs_dav::conn_setup oacs_dav::conn_setup (public) oacs_dav::request_folder_id oacs_dav::request_folder_id oacs_dav::conn_setup->oacs_dav::request_folder_id oacs_dav::item_parent_folder_id oacs_dav::item_parent_folder_id (public) oacs_dav::item_parent_folder_id->oacs_dav::request_folder_id db_string db_string (public) oacs_dav::request_folder_id->db_string

Testcases:
No testcase defined.

oacs_dav::request_site_node (public)

 oacs_dav::request_site_node uri

resolves uri to a site node_id

Parameters:
uri (required)

Partial Call Graph (max 5 caller/called nodes):
%3 oacs_dav::conn_setup oacs_dav::conn_setup (public) oacs_dav::request_site_node oacs_dav::request_site_node oacs_dav::conn_setup->oacs_dav::request_site_node oacs_dav::item_parent_folder_id oacs_dav::item_parent_folder_id (public) oacs_dav::item_parent_folder_id->oacs_dav::request_site_node site_node::get site_node::get (public) oacs_dav::request_site_node->site_node::get

Testcases:
No testcase defined.

oacs_dav::set_user_id (public)

 oacs_dav::set_user_id

set user_id based on authentication header

Partial Call Graph (max 5 caller/called nodes):
%3 oacs_dav::conn_setup oacs_dav::conn_setup (public) oacs_dav::set_user_id oacs_dav::set_user_id oacs_dav::conn_setup->oacs_dav::set_user_id ad_conn ad_conn (public) oacs_dav::set_user_id->ad_conn auth::authenticate auth::authenticate (public) oacs_dav::set_user_id->auth::authenticate auth::authority::get_authority_options auth::authority::get_authority_options (public) oacs_dav::set_user_id->auth::authority::get_authority_options http_auth::basic_authentication_decode http_auth::basic_authentication_decode (public) oacs_dav::set_user_id->http_auth::basic_authentication_decode

Testcases:
No testcase defined.

oacs_dav::unregister_folder (public)

 oacs_dav::unregister_folder folder_id node_id

remove a uri from dav support

Parameters:
folder_id (required)
node_id (required)

Partial Call Graph (max 5 caller/called nodes):
%3 fs::before_unmount fs::before_unmount (private) oacs_dav::unregister_folder oacs_dav::unregister_folder fs::before_unmount->oacs_dav::unregister_folder db_dml db_dml (public) oacs_dav::unregister_folder->db_dml

Testcases:
No testcase defined.

oacs_dav::uri_prefix (public)

 oacs_dav::uri_prefix
Returns:
URI prefix to use for WebDAV requests

Partial Call Graph (max 5 caller/called nodes):
%3 fs::webdav_url fs::webdav_url (public) oacs_dav::uri_prefix oacs_dav::uri_prefix fs::webdav_url->oacs_dav::uri_prefix oacs_dav::conn_setup oacs_dav::conn_setup (public) oacs_dav::conn_setup->oacs_dav::uri_prefix apm_package_id_from_key apm_package_id_from_key (public) oacs_dav::uri_prefix->apm_package_id_from_key parameter::get parameter::get (public) oacs_dav::uri_prefix->parameter::get

Testcases:
No testcase defined.
[ hide source ] | [ make this the default ]

Content File Source

ad_library {

    Support for tDAV Tcl webDAV implementation

    @author Dave Bauer (dave@thedesignexperience.org)
    @creation-date 2003-09-11
    @cvs-id $Id: oacs-dav-procs.tcl,v 1.24.2.10 2023/07/10 09:41:44 gustafn Exp $

}

namespace eval oacs_dav {}

d_proc oacs_dav::folder_enabled {
    -folder_id
} {
    @param folder_id

    @return t if folder is webdav enabled, f if not
} {

    return [db_string enabled_p "" -default "f"]

}

ad_proc oacs_dav::set_user_id {} {
    set user_id based on authentication header
} {
    #
    # Get Authorization header.
    #
    set authorization [ns_set iget [ns_conn headers] Authorization]
    if {[string length $authorization]} {
        set credentials [http_auth::basic_authentication_decode $authorization]
        ns_log debug "\nTDAV 5.0 authentication"
        #
        # check all authorities
        #
        foreach authority [auth::authority::get_authority_options] {
            set authority_id [lindex $authority 1]
            array set auth [auth::authenticate \
                                -username [dict get $credentials user] \
                                -password [dict get $credentials password] \
                                -authority_id $authority_id \
                                -no_cookie]
            if {$auth(auth_status) ne "ok" } {
                array set auth [auth::authenticate \
                                    -email [dict get $credentials user] \
                                    -password [dict get $credentials password] \
                                    -authority_id $authority_id \
                                    -no_cookie]
            }
            if {$auth(auth_status) eq "ok"} {
            # we can stop checking
                break
            }
        }
        if {$auth(auth_status) ne "ok" } {
            ns_log debug "\nTDAV 5.0 auth status $auth(auth_status)"
            ns_returnunauthorized
            return 0
        }
        ns_log debug "\nTDAV: auth_check OpenACS 5.0 user_id= $auth(user_id)"
        ad_conn -set user_id $auth(user_id)

    } else {
        # no authenticate header, anonymous visitor
        ad_conn -set user_id 0
        ad_conn -set untrusted_user_id 0
    }
}

ad_proc oacs_dav::authorize { args } {
    check is user_id has permission to perform the WebDAV method on
    the URI
} {
    ns_log debug "\nOACS-DAV running oacs_dav::authorize"

    # Restrict to SSL if required
    if { [security::RestrictLoginToSSLP]  && ![security::secure_conn_p] } {
        ns_returnunauthorized
        return filter_return
    }

    # set common data for all requests
    oacs_dav::conn_setup

    set method [string tolower [oacs_dav::conn method]]
    set item_id [oacs_dav::conn item_id]
    set user_id [oacs_dav::conn user_id]
    set folder_id [oacs_dav::conn folder_id]
    ns_log debug "\nOACS-DAV oacs_dav::authorize user_id $user_id method $method item_id $item_id"
    set authorized_p 0
    # if item doesn't exist don't bother checking....
    if {$item_id eq ""} {
        if {"put" ne $method && "mkcol" ne $method && "lock" ne $method } {
            ns_log debug "\noacs_dav::authorize file not found"
            ns_return 404 text/plain "File Not Found"
            return filter_return
        }
    }
    switch $method {
        put -
        mkcol {
            set authorized_p [permission::permission_p \
                                  -object_id $folder_id \
                                  -party_id $user_id \
                                  -privilege "create"]
        }
        delete {
            set authorized_p [permission::permission_p \
                                  -object_id $item_id \
                                  -party_id $user_id \
                                  -privilege "delete"]
        }
        lock {
            if {$item_id ne ""} {
                set authorized_p [permission::permission_p \
                          -object_id $item_id \
                          -party_id $user_id \
                          -privilege "write"]
            } else {
                # if item does not exist yet check for create on
                # the collection and create a null lock
                set authorized_p [permission::permission_p \
                                  -object_id $folder_id \
                                  -party_id $user_id \
                                  -privilege "create"]
            }
        }
        unlock -
        proppatch {
            set authorized_p [permission::permission_p \
                                  -object_id $item_id \
                                  -party_id $user_id \
                                  -privilege "write"]
        }
        copy -
        move {
            set dest_parent_id [oacs_dav::conn dest_parent_id]
            if {$dest_parent_id eq ""} {
                ns_return 409 text/plain {Non-existent destination}
                return filter_ok
            }
            set authorized_p [expr [permission::permission_p \
                                        -object_id $item_id \
                                        -party_id $user_id \
                                        -privilege "read"] \
                                && [permission::permission_p \
                                        -object_id $dest_parent_id \
                                        -party_id $user_id \
                                        -privilege "create"]\
                                || [permission::permission_p \
                                        -object_id $dest_parent_id \
                                        -party_id $user_id \
                                        -privilege "write"]]
        }
        propfind {
            if {$user_id eq ""} {
                ns_returnunauthorized
            } else {
                set authorized_p [permission::permission_p \
                                  -object_id $item_id \
                                  -party_id $user_id \
                                  -privilege "read"]
            }
        }
        head -
        get {
            # default for GET PROPFIND
            set authorized_p [permission::permission_p \
                                  -object_id $item_id \
                                  -party_id $user_id \
                                  -privilege "read"]
        }
    }
    if { !$authorized_p } {
        ns_returnunauthorized
        return filter_return
    }
    return filter_ok
}

d_proc -public oacs_dav::conn {
    args
} {
    shared data for WebDAV requests
} {
    global tdav_conn
    set flag [lindex $args 0]
    if { [string index $flag 0] ne "-" } {
        set var $flag
        set flag "-get"
    } else {
        set var [lindex $args 1]
    }
    switch -- $flag {
        -set {
            set value [lindex $args 2]
            set tdav_conn($var$value
            return $value
        }
        -get {
            if { [info exists tdav_conn($var)] } {
                return $tdav_conn($var)
            } else {
                return [ad_conn $var]
            }
        }
    }
}

d_proc -public oacs_dav::register_folder {
    {-enabled_p "t"}
    folder_id
    node_id
} {
    add a uri to dav support
    @param folder_id
    @param node_id
    Register a root WebDAV enabled folder for a site node_id
    All requests that resolve to this site node id will be checked for
    WebDAV content using this folder as the root. Only one folder per
    node_id can be registered.
} {

    db_transaction {
        db_dml add_folder ""
    } on_error {
        ns_log error "OACS-DAV Failed attempt to add folder_id $folder_id as a WebDAV enabled folder for node_id $node_id. One folder is already registered"
        error "Only one folder per node_id may be registered."
    }
}

d_proc -public oacs_dav::unregister_folder {
    folder_id
    node_id
} {
    remove a uri from dav support
    @param folder_id
    @param node_id
} {
    db_dml remove_folder ""
}

d_proc -public oacs_dav::item_parent_folder_id {
    uri
} {
    get the folder_id of the parent of an item
    from the uri
    @param uri
    @return parent_folder_id or empty string if folder does not exist
} {

    array set sn [oacs_dav::request_site_node $uri]
    set node_id $sn(node_id)
    set root_folder_id [oacs_dav::request_folder_id $node_id]
    set urlv [split [string trimright [string range $uri [string length $sn(url)] end] "/""/"]
    if {[llength $urlv] >1} {
        set parent_name [join [lrange $urlv 0 [llength $urlv]-2] "/" ]
    } else {
        set parent_name "/"
    }
    ns_log debug "\nparent_folder_id urlv $urlv parent_name $parent_name uri $uri"
    if {[string trimright $parent_name "/"] eq [string trimright $sn(url) "/"]} {
        # content_item__get_id can't resolve "/"
        # because it strips the leading and trailing /
        # from the url you pass in, and cr_items.name of the folder
        # is not and empty string
        set parent_id $root_folder_id
    } else {
        set parent_id [db_exec_plsql get_parent_folder_id ""]
    }
    return $parent_id
}

d_proc -public oacs_dav::uri_prefix {
} {
    @return URI prefix to use for WebDAV requests
} {
    set oacs_dav_package_id [apm_package_id_from_key "oacs-dav"]
    return [parameter::get -package_id $oacs_dav_package_id -parameter "WebDAVURLPrefix" -default "/dav"]
}

ad_proc -public oacs_dav::conn_setup {} {
    Setup oacs_dav::conn, authenticate user
} {
    ad_conn -reset
    set uri [ns_urldecode [ns_conn url]]
    ns_log debug "\nconn_setp uri \"$uri\" "
    set dav_url_regexp "^[oacs_dav::uri_prefix]"
    regsub $dav_url_regexp $uri {} uri
    if {$uri eq ""} {
        set uri "/"
    }
    oacs_dav::conn -set uri $uri
    set method [ns_conn method]
    ns_log debug "\noacs_dav::conn_setup: uri \"$uri\" method $method"
    oacs_dav::set_user_id
    ns_log debug "\noacs_dav::conn_setup: uri \"$uri\" method $method user_id [oacs_dav::conn user_id]"
    array set sn [oacs_dav::request_site_node $uri]
    set node_id [oacs_dav::conn -set node_id $sn(node_id)]
    set package_id [oacs_dav::conn -set package_id $sn(package_id)]
    set folder_id [oacs_dav::conn -set folder_id [oacs_dav::request_folder_id [oacs_dav::conn node_id]]]
    set urlv [oacs_dav::conn -set urlv [split [string trimright $uri "/""/"]]

    set destination [ns_urldecode [ns_set iget [ns_conn headers] Destination]]

    regsub {https?://[^/]+/} $destination {/} dest

     regsub $dav_url_regexp $dest {} dest

    oacs_dav::conn -set oacs_destination $dest

    if {$dest ne ""} {
        oacs_dav::conn -set dest_parent_id [oacs_dav::item_parent_folder_id $dest]
    }

    # we need item_id and content_type
    # we should use content::init but that has caching and  I don't
    # have time to resolve the issues that raises right now
    # a full-featured, consistently used Tcl API for CR will fix that
    if {[llength $urlv] > 2} {
        set parent_url [join [lrange $urlv 0 [llength $urlv]-2] "/" ]
    } else {
        set parent_url "/"
    }
    ns_log debug "\noacs_dav::conn_setup: handle request parent_url $parent_url length urlv [llength $urlv] urlv $urlv"
    set item_name [lindex $urlv end]
    if {$item_name eq ""} {
        # for propget etc we need the name of the folder
        # the last element in urlv for a folder is an empty string
        set item_name [lindex [split [string trimleft $parent_url "/""/"] end]
    }
    oacs_dav::conn -set item_name $item_name
        ns_log debug "\noacs_dav::conn_setup: handle request parent_url $parent_url length urlv [llength $urlv] urlv $urlv item_name $item_name"
    set parent_id [oacs_dav::item_parent_folder_id $uri]

    set item_id [oacs_dav::conn -set item_id [db_exec_plsql get_item_id ""]]
    ns_log debug "\noacs_dav::conn_setup: uri $uri parent_url $parent_url folder_id $folder_id"
    if {[string trimright $uri "/"] eq [string trimright $sn(url) "/"]} {
        set item_id [oacs_dav::conn -set item_id $folder_id]
    }

    ns_log debug "\noacs_dav::conn_setup: item_id $item_id"
}

d_proc -public oacs_dav::children_have_permission_p {
    -user_id
    -item_id
    -privilege
} {
    Check permission on child items of item_id for user_id with privilege
    @param user_id
    @param item_id
    @param privilege

    @return returns 0 if user does not have privilege over all children otherwise return 1
} {
    set child_count [db_string child_perms ""]
    ns_log notice "\n ----- \n oacs_dav::children_have_permission_p \n child_count = $child_count \n ----- \n"
    incr child_count [db_string revision_perms ""]
    ns_log notice "\n ----- \n oacs_dav::children_have_permission_p \n child_count = $child_count \n ----- \n"
    ns_log notice "\n ----- \n oacs_dav::children_have_permission_p \n return [expr {$child_count == 0}] \n ----- \n"
    return [expr {$child_count == 0}]
}

ad_proc -public oacs_dav::handle_request { args } {
    dispatch request to the proper service contract implementation
} {

    set uri [oacs_dav::conn uri]
    set method [string tolower [ns_conn method]]
    ns_log debug "\noacs_dav::handle_request method=$method uri=$uri"
    set item_id [oacs_dav::conn item_id]
    set folder_id [oacs_dav::conn folder_id]
    set package_id [oacs_dav::conn package_id]
    set node_id [oacs_dav::conn node_id]
    set package_key [apm_package_key_from_id $package_id]

    ns_log debug "\noacs_dav::handle_request item_id is $item_id"
    if {$item_id eq ""} {
        ns_log debug "\noacs_dav::handle_request item_id is empty"
        # set this to null if nothing exists, only valid on PUT or MKCOL
        # to create a new item, otherwise we bail
        # item for URI does not exist
        # ask package what content type to use
            switch -- $method {
                mkcol {
                    if {![acs_sc_binding_exists_p dav_mkcol_type $package_key]} {
                        set content_type "content_folder"
                    } else {
                        set content_type [acs_sc::invoke -contract dav_mkcol_type -operation get_type -call_args "" -impl $package_key]
                    }
                }
                put {
                    if {![acs_sc_binding_exists_p dav_put_type $package_key]} {
                        set content_type "content_revision"
                    } else {
                        set content_type [acs_sc::invoke -contract dav_put_type -operation get_type -call_args "" -impl $package_key]
                    }

                }
                lock {
                    # assume resource on NULL LOCK
                    set content_type "content_revision"
                }
                default {
                    # return a 404 or other error
                    ns_log debug "\noacs_dav::handle_request: 404 handle request Item not found method $method URI $uri"
                    ns_return 404 text/html "File Not Found"
                    return
                }
            }

    } else {
        # get content type of existing item
        set content_type [content::item::get_content_type -item_id $item_id]
        if {$content_type eq ""} {
            set content_type "content_revision"
        }
        set content_type [oacs_dav::conn -set content_type $content_type]
    }
    # use content type
    # i think we should walk up the object type hierarchy up to
    # content_revision if we don't find an implementation
    # implementation name is content_type

    set real_content_type [oacs_dav::conn -set real_content_type $content_type]

    while {![acs_sc_binding_exists_p dav $content_type]} {
        # go up content_type hierarchy
        # we do the query here to avoid running the query
        # when the implementation for the content_type does
        # exist
        set content_type [db_string supertype "select supertype from acs_object_types where object_type = :content_type" -default ""]
        if { $content_type eq "content_revision"} {break}
        if { $content_type eq ""} { error "no dav implementation found for content_type $real_content_type" }
        ns_log Notice "now looking for a dav implementation for content_type $content_type"
    }

    oacs_dav::conn -set content_type $content_type

    # probably should catch this

    ns_log debug "\noacs_dav::handle_request method $method uri $uri item_id $item_id folder_id $folder_id package_id $package_id node_id $node_id content_type $content_type args $args"

    set response [acs_sc::invoke -contract dav -operation $method -call_args "" -impl $content_type]

    # here the sc impl might return us some data,
    # then we would probably have to send that to tDAV for processing
    ns_log debug "\nDAV: response is \"$response\""

    if {![string equal -nocase "get" $method]
        && ![string equal -nocase "head" $method]} {

        tdav::respond $response
    }
}

ad_proc -public oacs_dav::request_site_node { uri } {
    resolves uri to a site node_id
} {
    # if you want to serve up DAV content at a different URL
    # you still need to mount a package in the site-map
    # might change later when we figure out how to actually use it
    ns_log debug "\nOACS-DAV!! uri $uri"
    set sn [site_node::get -url $uri]
    return $sn
}

ad_proc -public oacs_dav::request_folder_id { node_id } {
    resolves a node_id to a DAV enabled folder_id
    @param node_id site node_id of request
    @return folder_id, or empty string if no folder exists
    in dav_package_folder_map for this node_id
} {
    return [db_string get_folder_id "" -default ""]
}

namespace eval oacs_dav::impl::content_folder {}

# this is probably going away, is there such thing as "source"
# of a folder/collection?

ad_proc -private oacs_dav::impl::content_folder::get {} {
    GET DAV method for content folders
    can't get a folder
} {

    # return something
    # if its just a plain file, and a GET then do we need to send anything
    # extra or just the file?
    return [list 409]
}

ad_proc oacs_dav::impl::content_folder::head {} {
    HEAD DAV method for content folders
    can't get a folder
} {

    # I am not sure what the behavior is, but the client
    # should be smart enough to do a propfind on a folder/collection

    return [list 409]
}

ad_proc -private oacs_dav::impl::content_folder::mkcol {} {
    MKCOL DAV method for generic content folder
    @author Dave Bauer
} {
    set uri [oacs_dav::conn uri]
    set user_id [oacs_dav::conn user_id]
    set peer_addr [oacs_dav::conn peeraddr]
    set item_id [oacs_dav::conn item_id]
    set fname [oacs_dav::conn item_name]
    set parent_id [oacs_dav::item_parent_folder_id $uri]
    if {$parent_id eq ""} {
        return [list 409]
    }
    if { $item_id ne ""} {
        return [list 405]
    }

    # probably have to revisit setting content_types allowed
    # and permissions, but inheriting from the parent seems
    # reasonable

    db_transaction {
            set new_folder_name $fname
            set label $fname
            set description $fname
            set new_folder_id [db_exec_plsql create_folder ""]
            set response [list 201]
    } on_error {
        set response [list 500]
    }

    return $response
}

ad_proc -private oacs_dav::impl::content_folder::copy {} {
    COPY DAV method for generic content folder
} {
    set package_id [oacs_dav::conn package_id]
    set user_id [oacs_dav::conn user_id]
    set peer_addr [oacs_dav::conn peeraddr]
    set copy_folder_id [oacs_dav::conn item_id]
    set overwrite [oacs_dav::conn overwrite]
    set target_uri [oacs_dav::conn oacs_destination]
    set new_parent_folder_id [oacs_dav::conn dest_parent_id]
    set durlv [split [string trimright $target_uri "/""/"]
    set new_name [lindex $durlv end]
    set uri [oacs_dav::conn uri]
    # check that destination exists and is WebDAV enabled
    # when depth is 0 copy just the folder
    # when depth is 1 copy contents
    ns_log debug "\nDAV Folder Copy dest $target_uri parent_id $new_parent_folder_id"
    if {$new_parent_folder_id eq ""} {
        return [list 409]
    }

    set dest_item_id [db_string get_dest_id "" -default ""]
    if {$dest_item_id ne ""} {
        ns_log debug "\n ----- \n DAV Folder Copy Folder Exists item_id $dest_item_id overwrite $overwrite \n ----- \n"
        if {![string equal -nocase $overwrite "T"]} {
            return [list 412]
        } elseif {![permission::permission_p \
                     -object_id $dest_item_id \
                     -party_id $user_id \
                      -privilege "write"]} {
            ns_returnunauthorized
        }
        # according to the spec copy with overwrite means
        # delete then copy
        set children_permission_p [oacs_dav::children_have_permission_p -item_id $copy_folder_id -user_id $user_id -privilege "delete"]
        if {!$children_permission_p} {
            return [list 409]
        }
        if {"unlocked" ne [tdav::check_lock $target_uri] } {
            return [list 423]
        }
        db_exec_plsql delete_for_copy ""
        set response [list 204]
        ns_log debug "\n ----- \n  CONTENT_FOLDER::COPY OVERWRITING RETURNING 204  \n ----- \n"
    } else {
        set response [list 201]
    }
    set err_p 0
    db_transaction {
        db_exec_plsql copy_folder ""
        # we need to do this because in oracle content_folder__copy
        # is a procedure and does not return the new folder_id
        set new_folder_id [db_string get_new_folder_id ""]
        # update all child items revisions to live revision
        db_dml update_child_revisions ""
    } on_error {
        set err_p 1
    }

    if { $err_p } {
        return [list 500]
    }

    tdav::copy_props $uri $target_uri
    return $response
}

ad_proc -private oacs_dav::impl::content_folder::move {} {
    MOVE DAV method for generic content folder
} {
    set package_id [oacs_dav::conn package_id]
    set user_id [oacs_dav::conn user_id]
    set peer_addr [oacs_dav::conn peeraddr]
    set uri [oacs_dav::conn uri]
    set target_uri [oacs_dav::conn oacs_destination]
    set move_folder_id [oacs_dav::conn item_id]
    set item_name [oacs_dav::conn item_name]
    set new_parent_folder_id [oacs_dav::conn dest_parent_id]
    set cur_parent_folder_id [oacs_dav::item_parent_folder_id $uri]
    set turlv [split [string trimright $target_uri "/""/"]
    set new_name [lindex $turlv end]
    set overwrite [oacs_dav::conn overwrite]

    if {"unlocked" ne [tdav::check_lock $uri] } {
        return [list 423]
    }

    if {$new_parent_folder_id eq ""} {
        set response [list 412]
        return $response
    }

    set dest_item_id [db_string get_dest_id "" -default ""]
    ns_log debug "\n@DAV@@ folder move new_name $new_name dest_id $dest_item_id new_folder_id $new_parent_folder_id \n"

    if {$dest_item_id ne ""} {

        if {![string equal -nocase $overwrite "T"]} {
            return [list 412]
        } elseif {![permission::permission_p \
                     -object_id $dest_item_id \
                     -party_id $user_id \
                      -privilege "write"]} {
            ns_returnunauthorized
        }
        # according to the spec move with overwrite means
        # delete then move
        if {"unlocked" ne [tdav::check_lock $target_uri] } {
            return [list 423]
        }
        # TODO check if we have permission over everything inside
        set children_permission_p [oacs_dav::children_have_permission_p -item_id $move_folder_id -user_id $user_id -privilege "delete"]
        if {!$children_permission_p} {
            return [list 409]
        }
        db_exec_plsql delete_for_move ""
        set response [list 204]
        ns_log debug "\n ----- \n  CONTENT_FOLDER::MOVE OVERWRITING RETURNING 204  \n ----- \n"
    } else {
        set response [list 201]
    }

    # don't let anyone move root DAV folders in the
    # dav_site_node_folder_map
    if {[db_string site_node_folder ""] ne "0" } {
        return [list 403]
    }

    set err_p 0
    db_transaction {
        if {$cur_parent_folder_id ne $new_parent_folder_id } {
            ns_log debug "\n@@DAV@@ move folder $move_folder_id"
            db_exec_plsql move_folder ""
            # change label if name is different
            if {$new_name ne $item_name } {
                db_dml update_label ""
            }
        } elseif {$new_name ne ""} {
            ns_log debug "\n@@DAV@@ move folder rename $move_folder_id to $new_name"
            db_exec_plsql rename_folder ""
        }

    } on_error {
        set err_p 1
    }

    if { $err_p } {
        return [list 500]
    }

    tdav::copy_props $uri $target_uri
    tdav::delete_props $uri
    tdav::remove_lock $uri
    return $response
}

ad_proc -private oacs_dav::impl::content_folder::delete {} {
    DELETE DAV method for generic content folder
} {
    set package_id [oacs_dav::conn package_id]
    set user_id [oacs_dav::conn user_id]
    set peer_addr [oacs_dav::conn peeraddr]
    set item_id [oacs_dav::conn item_id]
    set uri [oacs_dav::conn uri]

    if {"unlocked" ne [tdav::check_lock $uri] } {
        return [list 423]
    }
    set children_permission_p [oacs_dav::children_have_permission_p -item_id $item_id -user_id $user_id -privilege "delete"]
        if {!$children_permission_p} {
            return [list 403]
        }
    if {[catch {db_exec_plsql delete_folder ""} errmsg]} {
        ns_log error "content_folder::delete $errmsg"
        set response [list 500]
#       ns_log debug "\nCONTEXT IDS [db_list get_ids "select object_id from acs_objects where context_id=:item_id"]"
    } else {
        set response [list 204]
        tdav::delete_props $uri
        tdav::remove_lock $uri
    }

    return $response
}

ad_proc -private oacs_dav::impl::content_folder::propfind {} {
    PROPFIND DAV method for generic content folder
} {
    set user_id [oacs_dav::conn user_id]
    set depth [oacs_dav::conn depth]
    set encoded_uri [list]
    foreach fragment [split [ad_conn url] "/"] {
        lappend encoded_uri [ns_urlencode $fragment]
    }

    set folder_uri "[ad_conn location][join $encoded_uri "/"]"

    # this is wacky, but MS Web Folders usually (but not always)
    # requests a collection without a trailing slash
    # if you return a propfind with the href for the collection
    # with a trailing slash, sometimes (but not always) it will
    # get confused and show the collection as a member of itself
    regsub {/$} $folder_uri {} folder_uri
    if {$depth eq ""} {
        set depth 0
    }

    set prop_req [oacs_dav::conn prop_req]
    set folder_id [oacs_dav::conn item_id]

    # append the properties into response
    set all_properties [list]
    # hack to get the OS timezone to tack on the end of oracle timestamps
    # until we stop supporting oracle 8i
    set os_time_zone [clock format [clock seconds] -format %Z]
    db_foreach get_properties "" {
        set name $name
        set etag "1f9a-400-3948d0f5"
        set properties [list]
        # is "D" the namespace??
        lappend properties [list "D" "getcontentlength"$content_length

#       ns_log debug "\nDAVEB item_id $item_id folder_id $folder_id $item_uri"
        if {$item_id == $folder_id} {
            set item_uri "/"
        } else {
            set encoded_uri [list]
            foreach fragment [split $item_uri "/"] {
                lappend encoded_uri [ns_urlencode $fragment]
#               ns_log debug "\npropfind: fragment \"$fragment\" encoded_uri \"$encoded_uri\" "
            }
            set item_uri "/[join $encoded_uri "/"]"

        }

        lappend properties [list "D" "getcontenttype"$mime_type
        # where do we get an etag from?
        lappend properties [list "D" "getetag"$etag
        lappend properties [list "D" "getlastmodified"$last_modified
        lappend properties [list "D" "creationdate"$creation_date
        if {$collection_p} {
            lappend properties [list "D" "resourcetype""D:collection"
        } else {
        lappend properties [list "D" "resourcetype"""
        }

        # according to Todd's example
        # resourcetype for a folder(collection) is <D:collection/>
        # and getcontenttype is */*
        foreach i [tdav::get_user_props ${folder_uri}${item_uri} $depth $prop_req] {
            lappend properties $i
        }
        lappend all_properties [list ${folder_uri}${item_uri} $collection_p $properties]
    }

    set response [list 207 $all_properties]

    return $response


}

ad_proc -private oacs_dav::impl::content_folder::proppatch {} {
    PROPPATCH DAV method for generic content folder
    user-properties are stored in the filesystem by tDAV
    this doesn't do anything until tDAV allows storage of
    user properties in the database
} {
    set uri [oacs_dav::conn uri]

    if {"unlocked" ne [tdav::check_lock $uri] } {
        return [list 423]
    }

    set response [tdav::update_user_props $uri [oacs_dav::conn prop_req]]
    return [list 207 $response]
}

ad_proc -private oacs_dav::impl::content_folder::put {} {
    # Just a noop ti implement the full service contract
}

ad_proc -private oacs_dav::impl::content_folder::lock {} {
    LOCK DAV method for generic content folder
} {
    set uri [oacs_dav::conn uri]
    set owner [oacs_dav::conn lock_owner]
    set scope [oacs_dav::conn lock_scope]
    set type [oacs_dav::conn lock_type]

    if {"unlocked" ne [tdav::check_lock $uri] } {
        set ret_code 423

        set response [list $ret_code]
    } else {
        set depth [tdav::conn depth]
        set timeout [tdav::conn lock_timeout]
        if {$timeout eq ""} {
            set timeout [parameter::get_from_package_key -parameter "DefaultLockTimeout" -package_key "oacs-dav" -default "300"]
        }
        set token [tdav::set_lock $uri $depth $type $scope $owner $timeout]
        set ret_code 200
        set response [list $ret_code [list depth $depth token $token timeout $timeout owner $owner scope $scope type $type]]
    }
    return $response
}

ad_proc -private oacs_dav::impl::content_folder::unlock {} {
    UNLOCK DAV method for generic content folder
} {
    set uri [oacs_dav::conn uri]

    if {"unlocked" ne [tdav::check_lock_for_unlock $uri] } {
        set ret_code 423
        set body "Resource is locked."
    } else {
        ns_log debug "\ntdav::check_lock_for_unlock = [tdav::check_lock_for_unlock $uri]]"
        tdav::remove_lock $uri
        set ret_code 204
        set body ""
    }

    return [list $ret_code $body]
}

namespace eval oacs_dav::impl::content_revision {}

ad_proc -private oacs_dav::impl::content_revision::get {} {
    GET DAV method for generic content revision
    @author Dave Bauer
} {

    set item_id [oacs_dav::conn item_id]

    #should return the DAV content for the content item
    #for now we always get live/latest revision

    cr_write_content -item_id $item_id

}

ad_proc -private oacs_dav::impl::content_revision::head {} {
    GET DAV method for generic content revision
    @author Dave Bauer
} {

    set item_id [oacs_dav::conn item_id]

    # cr_write_content works correctly for HEAD requests
    # with filesystem storage, it sends out the content
    # on lob storage. that needs to be fixed.

    cr_write_content -item_id $item_id
}

ad_proc -private oacs_dav::impl::content_revision::put {} {
    PUT DAV method for generic content revision
    @author Dave Bauer
} {
    set user_id [oacs_dav::conn user_id]
    set item_id [oacs_dav::conn item_id]
    set root_folder_id [oacs_dav::conn folder_id]
    set uri [oacs_dav::conn uri]

    if {"unlocked" ne [tdav::check_lock $uri] } {
        return [list 423]
    }

    set tmp_filename [oacs_dav::conn tmpfile]
    set tmp_size [file size $tmp_filename]
    # authenticate that user has write privilege

    # we need to calculate parent_id from the URI
    # it might not be the root DAV folder for the package
    # check for folder or not
    set urlv [split [oacs_dav::conn uri] "/"]

    set name [oacs_dav::conn item_name]
    set parent_id [oacs_dav::item_parent_folder_id $uri]
    if {$parent_id eq ""} {
        set response [list 409]
        return $response
    }

    # create new item if necessary
    db_transaction {
        set mime_type [cr_filename_to_mime_type $name]
        if {$item_id eq ""} {
            # this won't really work very nicely if we support
            # abstract url type names... maybe chop off the extension
            # when we name the object?

            set revision_id [cr_import_content \
                                 -storage_type file \
                                 $parent_id \
                                 $tmp_filename \
                                 $tmp_size \
                                 $mime_type \
                                 $name]

            if {[file exists [tdav::get_lock_file $uri]]} {
                # if there is a null lock use 204
                set response [list 204]
            } else {
                set response [list 201]
            }

        } else {
            set revision_id [cr_import_content \
                                 -item_id $item_id \
                                 -storage_type file \
                                 $parent_id \
                                 $tmp_filename \
                                 $tmp_size \
                                 $mime_type \
                                 $name]
            set response [list 204]
        }
        db_dml set_live_revision ""

    } on_error {
        set response [list 500]
        ns_log error "oacs_dav::impl::content_revision::put: $errmsg"
    }
    file delete -- $tmp_filename
    # at least we need to return the http_status
    return $response

}

ad_proc -private oacs_dav::impl::content_revision::propfind {} {
    PROPFIND DAV method for generic content revision
    @author Dave Bauer
} {
    set user_id [oacs_dav::conn user_id]
    set item_id [oacs_dav::conn item_id]
    set folder_id [oacs_dav::conn folder_id]
    set uri [oacs_dav::conn uri]

    set depth [oacs_dav::conn depth]
    set prop_req [oacs_dav::conn prop_req]

    set os_time_zone [clock format [clock seconds] -format %Z]

    # find the values
    db_1row get_properties ""
    set etag "1f9a-400-3948d0f5"
    set properties [list]
    # is "D" the namespace??
    lappend properties [list "D" "getcontentlength"$content_length
#    lappend properties [list "D" "uri"] $item_uri
    lappend properties [list "D" "getcontenttype"$mime_type
    # where do we get an etag from?
    lappend properties [list "D" "getetag"$etag
    lappend properties [list "D" "getlastmodified"$last_modified
    lappend properties [list "D" "creationdate"$creation_date
    lappend properties [list "D" "resourcetype"""

        foreach i [tdav::get_user_props ${uri} $depth $prop_req] {
            lappend properties $i
        }

    set response [list 207 [list [list $uri "" $properties]]]

    return $response
}

ad_proc -private oacs_dav::impl::content_revision::proppatch {} {
    PROPPATCH DAV method for generic content revision
    We store all user properties in the filesystem using tDAV for now
    So this is just a stub until we can get everything stored in the
    database.
    @author Dave Bauer
} {
    # get the properties out of the list
    set uri [oacs_dav::conn uri]

    if {"unlocked" ne [tdav::check_lock $uri] } {
        return [list 423]
    }

    # set the values
    set response [tdav::update_user_props $uri [oacs_dav::conn prop_req]]
    # return results
    return [list 207 $response]
}

ad_proc -private oacs_dav::impl::content_revision::delete {} {
    DELETE DAV method for generic content revision
    @author Dave Bauer
} {
    set package_id [oacs_dav::conn package_id]
    set user_id [oacs_dav::conn user_id]
    set peer_addr [oacs_dav::conn peeraddr]
    set item_id [oacs_dav::conn item_id]
    set uri [oacs_dav::conn uri]
    if {"unlocked" ne [tdav::check_lock $uri] } {
        return [list 423]
    }
    if {[catch {db_exec_plsql delete_item ""} errmsg]} {
        set response [list 500]
    } else {
        set response [list 204]
        tdav::delete_props $uri
        tdav::remove_lock $uri
    }
    return $response
}

ad_proc -private oacs_dav::impl::content_revision::copy {} {
    COPY DAV method for generic content revision
    @author Dave Bauer
} {
    set package_id [oacs_dav::conn package_id]
    set user_id [oacs_dav::conn user_id]
    set peer_addr [oacs_dav::conn peeraddr]
    set uri [oacs_dav::conn uri]
    # check for write permission on target folder
    set target_uri [oacs_dav::conn oacs_destination]
    set copy_item_id [oacs_dav::conn item_id]
    set overwrite [oacs_dav::conn overwrite]
    set turlv [split [string trimright $target_uri "/""/"]
    set new_name [lindex $turlv end]
    set new_parent_folder_id [oacs_dav::conn dest_parent_id]
    if {$new_parent_folder_id eq ""} {
        return [list 409]
    }
    set dest_item_id [db_string get_dest_id "" -default ""]
    ns_log debug "\nDAV Revision Copy dest $target_uri parent_id $new_parent_folder_id"
    if {$dest_item_id ne ""} {
        ns_log debug "\n ----- \n DAV Revision Copy Folder Exists item_id $dest_item_id overwrite $overwrite \n ----- \n"
        if {![string equal -nocase $overwrite "T"]} {
            return [list 412]
        } elseif {![permission::permission_p \
                     -object_id $dest_item_id \
                     -party_id $user_id \
                      -privilege "write"]} {
                ns_returnunauthorized
        }
        # according to the spec copy with overwrite means
        # delete then copy
        ns_log debug "\noacs_dav::revision::copy checking for lock on target"
        if {"unlocked" ne [tdav::check_lock $target_uri] } {
            return [list 423]
        }

        db_exec_plsql delete_for_copy ""
        set response [list 204]
        ns_log debug "\n ----- \n  CONTENT_REVISION::COPY OVERWRITING RETURNING 204  \n ----- \n"
    } else {
        set response [list 201]
    }

    set err_p 0
    db_transaction {
        set item_id [db_exec_plsql copy_item ""]
        db_dml set_live_revision ""
    } on_error {
        set err_p 1
    }

    if { $err_p } {
        return [list 500]
    }

    tdav::copy_props $uri $target_uri
    return $response
}

ad_proc -private oacs_dav::impl::content_revision::move {} {
    MOVE DAV method for generic content revision
    @author Dave Bauer
} {

    set package_id [oacs_dav::conn package_id]
    set user_id [oacs_dav::conn user_id]
    set peer_addr [oacs_dav::conn peeraddr]
    set item_id [oacs_dav::conn item_id]
    set item_name [oacs_dav::conn item_name]
    set uri [oacs_dav::conn uri]
    set target_uri [oacs_dav::conn oacs_destination]
    set cur_parent_folder_id [oacs_dav::conn folder_id]
    set new_parent_folder_id [oacs_dav::conn dest_parent_id]
    set turlv [split [string trimright $target_uri "/""/"]
    set new_name [lindex $turlv end]
    set overwrite [oacs_dav::conn overwrite]
    if {$new_parent_folder_id eq ""} {
        return [list 409]
    }

    if {"unlocked" ne [tdav::check_lock $uri] } {
        return [list 423]
    }
ns_log debug "\nDAV Revision move dest $target_uri parent_id $new_parent_folder_id"
    set dest_item_id [db_string get_dest_id "" -default ""]
    if {$dest_item_id ne ""} {
        ns_log debug "\n ----- \n DAV Revision move Folder Exists item_id $dest_item_id overwrite $overwrite \n ----- \n"
        if {![string equal -nocase $overwrite "T"]} {
            return [list 412]
        } elseif {![permission::permission_p \
                     -object_id $dest_item_id \
                     -party_id $user_id \
                      -privilege "write"]} {
                return [list 401]
        }
        if {"unlocked" ne [tdav::check_lock $target_uri] } {
            return [list 423]
        }

        db_exec_plsql delete_for_move ""
        set response [list 204]
        ns_log debug "\n ----- \n  CONTENT_REVISION::MOVE OVERWRITING RETURNING 204  \n ----- \n"
    } else {
        set response [list 201]
    }

    set err_p 0
    db_transaction {
        if {$cur_parent_folder_id ne $new_parent_folder_id } {
                db_exec_plsql move_item ""

        } elseif {$new_name ne "" } {
            db_exec_plsql rename_item ""
        }
       if {$item_name ne $new_name } {
            db_dml update_title ""
        }
    } on_error {
        set err_p 1
    }

    if { $err_p } {
        return [list 500]
    }

    tdav::copy_props $uri $target_uri
    tdav::delete_props $uri
    tdav::remove_lock $uri
    return $response
}


ad_proc -private oacs_dav::impl::content_revision::mkcol {} {
    MKCOL DAV method for generic content revision
    @author Dave Bauer
} {
    # not allowed to create a collection inside a resource
    # return some sort of error
    set response [list 405]
    return $response
}

ad_proc -private oacs_dav::impl::content_revision::lock {} {
    LOCK DAV method for generic content revision
} {
    set uri [oacs_dav::conn uri]
    set owner [oacs_dav::conn lock_owner]
    set scope [oacs_dav::conn lock_scope]
    set type [oacs_dav::conn lock_type]

    if {"unlocked" ne [tdav::check_lock $uri] } {
        set ret_code 423

        set response [list $ret_code]
    } else {
        set depth [tdav::conn depth]
        set timeout [tdav::conn lock_timeout]
        if {$timeout eq ""} {
            set timeout 300
        }
        set token [tdav::set_lock $uri $depth $type $scope $owner $timeout]
        set ret_code 200
        set response [list $ret_code [list depth $depth token $token timeout $timeout owner $owner scope $scope type $type]]
    }
    return $response
}

ad_proc -private oacs_dav::impl::content_revision::unlock {} {
    UNLOCK DAV method for generic content revision
} {
    set uri [oacs_dav::conn uri]

    if {"unlocked" ne [tdav::check_lock_for_unlock $uri] } {
        set ret_code 423
        set body "Resource is locked."
    } else {
        ns_log debug "\ntdav::check_lock_for_unlock = [tdav::check_lock_for_unlock $uri]]"
        tdav::remove_lock $uri
        set ret_code 204
        set body ""
    }

    return [list $ret_code $body]
}

# Local variables:
#    mode: tcl
#    tcl-indent-level: 4
#    indent-tabs-mode: nil
# End: