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Implement basic freebusy support.

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This commit is contained in:
Andrew McMillan 2006-11-21 21:56:22 +13:00
parent af2a658827
commit eed763151f
2 changed files with 86 additions and 3 deletions
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71
htdocs/freebusy.php
View File

@ -1,9 +1,80 @@
<?php
require_once("always.php");
dbg_error_log( "freebusy", " User agent: %s", ((isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : "Unfortunately Mulberry and Chandler don't send a 'User-agent' header with their requests :-(")) );
require_once("BasicAuthSession.php");
$raw_headers = apache_request_headers();
$raw_post = file_get_contents ( 'php://input');
/**
* Our path is /<script name>/<user name>/<user controlled> if it ends in
* a trailing '/' then it is referring to a DAV 'collection' but otherwise
* it is referring to a DAV data item.
*
* Permissions are controlled as follows:
* 1. if there is no <user name> component, the request has read privileges
* 2. if the requester is an admin, the request has read/write priviliges
* 3. if there is a <user name> component which matches the logged on user
* then the request has read/write privileges
* 4. otherwise we query the defined relationships between users and use
* the minimum privileges returned from that analysis.
*/
$request_path = $_SERVER['PATH_INFO'];
$bad_chars_regex = '/[\\^\\[\\(\\\\]/';
if ( preg_match( $bad_chars_regex, $request_path ) ) {
header("HTTP/1.1 400 Bad Request");
header("Content-type: text/plain");
echo "The calendar path contains illegal characters.";
dbg_error_log("freebusy", "Illegal characters /%s/ in calendar path for User: %d, Path: %s", $bad_chars_regex, $session->user_no, $request_path);
exit(0);
}
dbg_error_log("freebusy", "Legal characters /%s/ in calendar path for User: %d, Path: %s", $bad_chars_regex, $session->user_no, $request_path);
$path_split = preg_split('#/+#', $request_path );
$permissions = array();
if ( !isset($path_split[1]) || $path_split[1] == '' ) {
dbg_error_log( "freebusy", "No useful path split possible" );
unset($path_user_no);
unset($path_username);
}
else {
$path_username = $path_split[1];
@dbg_error_log( "freebusy", "Path split into at least /// %s /// %s /// %s", $path_split[1], $path_split[2], $path_split[3] );
$qry = new PgQuery( "SELECT * FROM usr WHERE username = ?;", $path_username );
if ( $qry->Exec("caldav") && $path_user_record = $qry->Fetch() ) {
$path_user_no = $path_user_record->user_no;
}
if ( $session->AllowedTo("Admin") ) {
$permissions = array('read' => 'read', "write" => 'write' );
dbg_error_log( "freebusy", "Full permissions for a systems administrator" );
}
else if ( $session->user_no == $path_user_no ) {
$permissions = array('read' => 'read', "write" => 'write' );
dbg_error_log( "freebusy", "Full permissions for user accessing their own hierarchy" );
}
else if ( isset($path_user_no) ) {
/**
* We need to query the database for permissions
*/
$qry = new PgQuery( "SELECT get_permissions( ?, ? ) AS perm;", $session->user_no, $path_user_no);
if ( $qry->Exec("caldav") && $permission_result = $qry->Fetch() ) {
$permission_result = "!".$permission_result->perm; // We prepend something to ensure we get a non-zero position.
$permissions = array();
if ( strpos($permission_result,"R") ) $permissions['read'] = 'read';
if ( strpos($permission_result,"W") ) $permissions['write'] = 'write';
}
dbg_error_log( "freebusy", "Restricted permissions for user accessing someone elses hierarchy: read=%s, write=%s", isset($permissions['read']), isset($permissions['write']) );
}
}
if ( !isset($permissions['read']) ) {
header("HTTP/1.1 403 Forbidden");
header("Content-type: text/plain");
echo "You may not access that calendar.";
dbg_error_log("freebusy", "Access denied for User: %d, Path: %s", $session->user_no, $request_path);
exit(0);
}
switch ( $_SERVER['REQUEST_METHOD'] ) {
case 'GET':
include_once("freebusy-GET.php");

18
inc/freebusy-GET.php
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@ -1,5 +1,17 @@
<?php
echo "<h1>Unimplemented</h1><p>Unfortunately this function is planned, but not yet implemented</p";
echo "<p>Well, actually, perhaps 'planned' is too strong a word. It <em>is</em> on the roadmap, and if you want to
contribute to the planning, please add your two cents to the Sourceforge forums or tracker items</p>";
require_once("iCalendar.php");
header("Content-type: text/plain");
$where .= " WHERE caldav_data.dav_name ~ ".qpg("^".$request_path)." ";
$qry = new PgQuery( "SELECT * FROM caldav_data INNER JOIN calendar_item USING(user_no, dav_name)". $where );
if ( $qry->Exec("freebusy",__LINE__,__FILE__) && $qry->rows > 0 ) {
echo iCalendar::iCalHeader();
while( $calendar_object = $qry->Fetch() ) {
$parsed = new iCalendar( array('icalendar' => $calendar_object->caldav_data ) );
echo $parsed->RenderFreeBusy();
}
echo iCalendar::iCalFooter();
}
?>