1 | <?php |
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2 | /** |
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3 | * CalDAV Server - handle GET method |
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4 | * |
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5 | * @package davical |
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6 | * @subpackage caldav |
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7 | * @author Andrew McMillan <andrew@mcmillan.net.nz> |
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8 | * @copyright Catalyst .Net Ltd, Morphoss Ltd <http://www.morphoss.com/> |
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9 | * @license http://gnu.org/copyleft/gpl.html GNU GPL v2 or later |
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10 | */ |
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11 | dbg_error_log("get", "GET method handler"); |
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12 | |
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13 | require_once("iCalendar.php"); |
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14 | require_once("DAVResource.php"); |
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15 | |
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16 | $dav_resource = new DAVResource($request->path); |
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17 | $dav_resource->NeedPrivilege( array('urn:ietf:params:xml:ns:caldav:read-free-busy','DAV::read') ); |
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18 | |
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19 | if ( ! $dav_resource->Exists() ) { |
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20 | $request->DoResponse( 404, translate("Resource Not Found.") ); |
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21 | } |
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22 | |
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23 | function obfuscated_event( $icalendar ) { |
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24 | // The user is not admin / owner of this calendar looking at his calendar and can not admin the other cal, |
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25 | // or maybe they don't have *read* access but they got here, so they must at least have free/busy access |
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26 | // so we will present an obfuscated version of the event that just says "Busy" (translated :-) |
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27 | $confidential = new iCalComponent(); |
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28 | $confidential->SetType($icalendar->GetType()); |
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29 | $confidential->AddProperty( 'SUMMARY', translate('Busy') ); |
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30 | $confidential->AddProperty( 'CLASS', 'CONFIDENTIAL' ); |
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31 | $confidential->SetProperties( $icalendar->GetProperties('DTSTART'), 'DTSTART' ); |
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32 | $confidential->SetProperties( $icalendar->GetProperties('RRULE'), 'RRULE' ); |
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33 | $confidential->SetProperties( $icalendar->GetProperties('DURATION'), 'DURATION' ); |
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34 | $confidential->SetProperties( $icalendar->GetProperties('DTEND'), 'DTEND' ); |
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35 | $confidential->SetProperties( $icalendar->GetProperties('UID'), 'UID' ); |
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36 | $confidential->SetProperties( $icalendar->GetProperties('CREATED'), 'CREATED' ); |
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37 | |
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38 | return $confidential; |
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39 | } |
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40 | |
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41 | |
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42 | if ( $dav_resource->IsCollection() ) { |
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43 | if ( ! $dav_resource->IsCalendar() && !(isset($c->get_includes_subcollections) && $c->get_includes_subcollections) ) { |
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44 | /** RFC2616 says we must send an Allow header if we send a 405 */ |
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45 | header("Allow: PROPFIND,PROPPATCH,OPTIONS,MKCOL,REPORT,DELETE"); |
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46 | $request->DoResponse( 405, translate("GET requests on collections are only supported for calendars.") ); |
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47 | } |
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48 | |
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49 | /** |
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50 | * The CalDAV specification does not define GET on a collection, but typically this is |
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51 | * used as a .ics download for the whole collection, which is what we do also. |
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52 | */ |
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53 | $sql = 'SELECT caldav_data, class, caldav_type, calendar_item.user_no, logged_user '; |
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54 | $sql .= 'FROM collection INNER JOIN caldav_data USING(collection_id) INNER JOIN calendar_item USING ( dav_id ) WHERE '; |
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55 | if ( isset($c->get_includes_subcollections) && $c->get_includes_subcollections ) { |
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56 | $sql .= '(collection.dav_name ~ :path_match '; |
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57 | $sql .= 'OR collection.collection_id IN (SELECT bound_source_id FROM dav_binding WHERE dav_binding.dav_name ~ :path_match)) '; |
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58 | $params = array( ':path_match' => '^'.$request->path ); |
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59 | } |
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60 | else { |
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61 | $sql .= 'caldav_data.collection_id = :collection_id '; |
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62 | $params = array( ':collection_id' => $dav_resource->resource_id() ); |
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63 | } |
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64 | if ( isset($c->strict_result_ordering) && $c->strict_result_ordering ) $sql .= ' ORDER BY dav_id'; |
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65 | |
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66 | $qry = new AwlQuery( $sql, $params ); |
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67 | if ( !$qry->Exec("GET",__LINE__,__FILE__) ) { |
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68 | $request->DoResponse( 500, translate("Database Error") ); |
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69 | } |
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70 | |
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71 | /** |
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72 | * Here we are constructing a whole calendar response for this collection, including |
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73 | * the timezones that are referred to by the events we have selected. |
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74 | */ |
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75 | $vcal = new iCalComponent(); |
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76 | $vcal->VCalendar(); |
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77 | $displayname = $dav_resource->GetProperty('displayname'); |
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78 | if ( isset($displayname) ) { |
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79 | $vcal->AddProperty("X-WR-CALNAME", $displayname); |
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80 | } |
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81 | |
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82 | $need_zones = array(); |
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83 | $timezones = array(); |
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84 | while( $event = $qry->Fetch() ) { |
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85 | $ical = new iCalComponent( $event->caldav_data ); |
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86 | |
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87 | /** Save the timezone component(s) into a minimal set for inclusion later */ |
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88 | $event_zones = $ical->GetComponents('VTIMEZONE',true); |
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89 | foreach( $event_zones AS $k => $tz ) { |
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90 | $tzid = $tz->GetPValue('TZID'); |
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91 | if ( !isset($tzid) ) continue ; |
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92 | if ( $tzid != '' && !isset($timezones[$tzid]) ) { |
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93 | $timezones[$tzid] = $tz; |
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94 | } |
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95 | } |
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96 | |
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97 | /** Work out which ones are actually used here */ |
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98 | $comps = $ical->GetComponents('VTIMEZONE',false); |
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99 | foreach( $comps AS $k => $comp ) { |
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100 | $tzid = $comp->GetPParamValue('DTSTART', 'TZID'); if ( isset($tzid) && !isset($need_zones[$tzid]) ) $need_zones[$tzid] = 1; |
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101 | $tzid = $comp->GetPParamValue('DUE', 'TZID'); if ( isset($tzid) && !isset($need_zones[$tzid]) ) $need_zones[$tzid] = 1; |
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102 | $tzid = $comp->GetPParamValue('DTEND', 'TZID'); if ( isset($tzid) && !isset($need_zones[$tzid]) ) $need_zones[$tzid] = 1; |
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103 | |
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104 | if ( $dav_resource->HavePrivilegeTo('all',false) || $session->user_no == $event->user_no || $session->user_no == $event->logged_user |
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105 | || ( $c->allow_get_email_visibility && $comp->IsAttendee($session->email) ) ) { |
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106 | /** |
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107 | * These people get to see all of the event, and they should always |
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108 | * get any alarms as well. |
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109 | */ |
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110 | $vcal->AddComponent($comp); |
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111 | continue; |
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112 | } |
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113 | /** No visibility even of the existence of these events if they aren't admin/owner/attendee */ |
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114 | if ( $event->class == 'PRIVATE' ) continue; |
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115 | |
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116 | if ( ! $dav_resource->HavePrivilegeTo('DAV::read') || $event->class == 'CONFIDENTIAL' ) { |
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117 | $vcal->AddComponent(obfuscated_event($comp)); |
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118 | } |
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119 | elseif ( isset($c->hide_alarm) && $c->hide_alarm ) { |
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120 | // Otherwise we hide the alarms (if configured to) |
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121 | $comp->ClearComponents('VALARM'); |
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122 | $vcal->AddComponent($comp); |
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123 | } |
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124 | else { |
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125 | $vcal->AddComponent($comp); |
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126 | } |
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127 | } |
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128 | } |
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129 | |
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130 | /** Put the timezones on there that we need */ |
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131 | foreach( $need_zones AS $tzid => $v ) { |
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132 | if ( isset($timezones[$tzid]) ) $vcal->AddComponent($timezones[$tzid]); |
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133 | } |
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134 | |
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135 | $response = $vcal->Render(); |
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136 | header( 'Content-Length: '.strlen($response) ); |
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137 | header( 'Etag: '.$dav_resource->unique_tag() ); |
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138 | $request->DoResponse( 200, ($request->method == 'HEAD' ? '' : $response), 'text/calendar; charset="utf-8"' ); |
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139 | } |
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140 | |
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141 | |
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142 | // Just a single event then |
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143 | |
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144 | $resource = $dav_resource->resource(); |
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145 | $ic = new iCalComponent( $resource->caldav_data ); |
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146 | |
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147 | /** Default deny... */ |
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148 | $allowed = false; |
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149 | if ( $dav_resource->HavePrivilegeTo('all', false) || $session->user_no == $resource->user_no || $session->user_no == $resource->logged_user |
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150 | || ( $c->allow_get_email_visibility && $ic->IsAttendee($session->email) ) ) { |
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151 | /** |
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152 | * These people get to see all of the event, and they should always |
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153 | * get any alarms as well. |
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154 | */ |
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155 | $allowed = true; |
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156 | } |
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157 | else if ( $resource->class != 'PRIVATE' ) { |
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158 | $allowed = true; // but we may well obfuscate it below |
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159 | if ( ! $dav_resource->HavePrivilegeTo('DAV::read') || ( $resource->class == 'CONFIDENTIAL' && ! $request->HavePrivilegeTo('DAV::write-content') ) ) { |
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160 | $ical = new iCalComponent( $resource->caldav_data ); |
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161 | $comps = $ical->GetComponents('VTIMEZONE',false); |
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162 | $confidential = obfuscated_event($comps[0]); |
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163 | $ical->SetComponents( array($confidential), $resource->caldav_type ); |
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164 | $resource->caldav_data = $ical->Render(); |
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165 | } |
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166 | } |
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167 | // else $resource->class == 'PRIVATE' and this person may not see it. |
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168 | |
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169 | if ( ! $allowed ) { |
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170 | $request->DoResponse( 403, translate("Forbidden") ); |
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171 | } |
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172 | |
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173 | header( 'Etag: "'.$resource->dav_etag.'"' ); |
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174 | header( 'Content-Length: '.strlen($resource->caldav_data) ); |
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175 | |
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176 | $contenttype = 'text/plain'; |
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177 | switch( $resource->caldav_type ) { |
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178 | case 'VJOURNAL': |
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179 | case 'VEVENT': |
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180 | case 'VTODO': |
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181 | $contenttype = 'text/calendar'; |
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182 | break; |
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183 | |
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184 | case 'VCARD': |
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185 | $contenttype = 'text/x-vcard'; |
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186 | break; |
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187 | } |
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188 | |
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189 | $request->DoResponse( 200, ($request->method == 'HEAD' ? '' : $resource->caldav_data), $contenttype.'; charset="utf-8"' ); |
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