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-/* -*- Mode: C -*- */
-/*======================================================================
- FILE: icalgauge.c
- CREATOR: eric 23 December 1999
-
-
- $Id$
- $Locker$
-
- (C) COPYRIGHT 2000, Eric Busboom, http://www.softwarestudio.org
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of either:
-
- The LGPL as published by the Free Software Foundation, version
- 2.1, available at: http://www.fsf.org/copyleft/lesser.html
-
- Or:
-
- The Mozilla Public License Version 1.0. You may obtain a copy of
- the License at http://www.mozilla.org/MPL/
-
- The Original Code is eric. The Initial Developer of the Original
- Code is Eric Busboom
-
-
-======================================================================*/
-
-#include "ical.h"
-
-/* Convert a VQUERY component into a gauge */
-icalcomponent* icalgauge_make_gauge(icalcomponent* query);
-
-/* icaldirset_test compares a component against a gauge, and returns
- true if the component passes the test
-
- The gauge is a VCALENDAR component that specifies how to test the
- target components. The guage holds a collection of VEVENT, VTODO or
- VJOURNAL sub-components. Each of the sub-components has a
- collection of properties that are compared to corresponding
- properties in the target component, according to the
- X-LIC-COMPARETYPE parameters to the gauge's properties.
-
- When a gauge has several sub-components, the results of testing the
- target against each of them is ORed together - the target
- component will pass if it matches any of the sub-components in the
- gauge. However, the results of matching the proeprties in a
- sub-component are ANDed -- the target must match every property in
- a gauge sub-component to match the sub-component.
-
- Here is an example:
-
- BEGIN:XROOT
- BEGIN:VCOMPONENT
- BEGIN:VEVENT
- DTSTART;X-LIC-COMPARETYPE=LESS:19981025T020000
- ORGANIZER;X-LIC-COMPARETYPE=EQUAL:mrbig@host.com
- END:VEVENT
- BEGIN:VEVENT
- LOCATION;X-LIC-COMPARETYPE=EQUAL:McNary's Pub
- END:VEVENT
- END:VCALENDAR
- END:XROOT
-
- This gauge has two sub-components; one which will match a VEVENT
- based on start time, and organizer, and another that matches based
- on LOCATION. A target component will pass the test if it matched
- either of the sub-components.
-
- */
-
-
-int icalgauge_test_recurse(icalcomponent* comp, icalcomponent* gauge)
-{
- int pass = 1,localpass = 0;
- icalproperty *p;
- icalcomponent *child,*subgauge;
- icalcomponent_kind gaugekind, compkind;
-
- icalerror_check_arg_rz( (comp!=0), "comp");
- icalerror_check_arg_rz( (gauge!=0), "gauge");
-
- gaugekind = icalcomponent_isa(gauge);
- compkind = icalcomponent_isa(comp);
-
- if( ! (gaugekind == compkind || gaugekind == ICAL_ANY_COMPONENT) ){
- return 0;
- }
-
- /* Test properties. For each property in the gauge, search through
- the component for a similar property. If one is found, compare
- the two properties value with the comparison specified in the
- gauge with the X-LIC-COMPARETYPE parameter */
-
- for(p = icalcomponent_get_first_property(gauge,ICAL_ANY_PROPERTY);
- p != 0;
- p = icalcomponent_get_next_property(gauge,ICAL_ANY_PROPERTY)){
-
- icalproperty* targetprop;
- icalparameter* compareparam;
- icalparameter_xliccomparetype compare;
- int rel; /* The relationship between the gauge and target values.*/
-
- /* Extract the comparison type from the gauge. If there is no
- comparison type, assume that it is "EQUAL" */
-
- compareparam = icalproperty_get_first_parameter(
- p,
- ICAL_XLICCOMPARETYPE_PARAMETER);
-
- if (compareparam!=0){
- compare = icalparameter_get_xliccomparetype(compareparam);
- } else {
- compare = ICAL_XLICCOMPARETYPE_EQUAL;
- }
-
- /* Find a property in the component that has the same type
- as the gauge property. HACK -- multiples of a single
- property type in the gauge will match only the first
- instance in the component */
-
- targetprop = icalcomponent_get_first_property(comp,
- icalproperty_isa(p));
-
- if(targetprop != 0){
-
- /* Compare the values of the gauge property and the target
- property */
-
- rel = icalvalue_compare(icalproperty_get_value(p),
- icalproperty_get_value(targetprop));
-
- /* Now see if the comparison is equavalent to the comparison
- specified in the gauge */
-
- if (rel == compare){
- localpass++;
- } else if (compare == ICAL_XLICCOMPARETYPE_LESSEQUAL &&
- ( rel == ICAL_XLICCOMPARETYPE_LESS ||
- rel == ICAL_XLICCOMPARETYPE_EQUAL)) {
- localpass++;
- } else if (compare == ICAL_XLICCOMPARETYPE_GREATEREQUAL &&
- ( rel == ICAL_XLICCOMPARETYPE_GREATER ||
- rel == ICAL_XLICCOMPARETYPE_EQUAL)) {
- localpass++;
- } else if (compare == ICAL_XLICCOMPARETYPE_NOTEQUAL &&
- ( rel == ICAL_XLICCOMPARETYPE_GREATER ||
- rel == ICAL_XLICCOMPARETYPE_LESS)) {
- localpass++;
- } else {
- localpass = 0;
- }
-
- pass = pass && (localpass>0);
- }
- }
-
- /* Test subcomponents. Look for a child component that has a
- counterpart in the gauge. If one is found, recursively call
- icaldirset_test */
-
- for(subgauge = icalcomponent_get_first_component(gauge,ICAL_ANY_COMPONENT);
- subgauge != 0;
- subgauge = icalcomponent_get_next_component(gauge,ICAL_ANY_COMPONENT)){
-
- gaugekind = icalcomponent_isa(subgauge);
-
- if (gaugekind == ICAL_ANY_COMPONENT){
- child = icalcomponent_get_first_component(comp,ICAL_ANY_COMPONENT);
- } else {
- child = icalcomponent_get_first_component(comp,gaugekind);
- }
-
- if(child !=0){
- localpass = icalgauge_test_recurse(child,subgauge);
- pass = pass && localpass;
- } else {
- pass = 0;
- }
- }
-
- return pass;
-}
-
-/* guagecontainer is an XROOT component that holds several gauges. The
- results of comparing against these gauges are ORed together in this
- routine */
-int icalgauge_test(icalcomponent* comp,
- icalcomponent* gaugecontainer)
-{
- int pass = 0;
- icalcomponent *gauge;
-
- icalerror_check_arg_rz( (comp!=0), "comp");
- icalerror_check_arg_rz( (gauge!=0), "gauge");
-
- for(gauge = icalcomponent_get_first_component(gaugecontainer,ICAL_ANY_COMPONENT);
- gauge != 0;
- gauge = icalcomponent_get_next_component(gaugecontainer,ICAL_ANY_COMPONENT)){
-
- pass += icalgauge_test_recurse(comp, gauge);
- }
-
- return pass>0;
-
-}
-
-