1 files changed, 144 insertions, 0 deletions
diff --git a/libical/examples/access_properties_and_parameters.c b/libical/examples/access_properties_and_parameters.c
new file mode 100644
index 0000000000..e19656f57f
--- /dev/null
+++ b/libical/examples/access_properties_and_parameters.c
@@ -0,0 +1,144 @@
+/* access_properties_and_parameters.c */
+
+#include "ical.h"
+
+/* Get a particular parameter out of a component. This routine will
+   return a list of strings of all attendees who are required. Note
+   that this routine assumes that the component that we pass in is a
+   VEVENT.  */
+   
+void get_required_attendees(icalcomponent* event)
+{
+    icalproperty* p;
+    icalparameter* parameter;
+    int c=0;
+    
+    assert(event != 0);
+    assert(icalcomponent_isa(event) == ICAL_VEVENT_COMPONENT);
+    
+    /* This loop iterates over all of the ATTENDEE properties in the
+       event */
+    
+    /* The iteration routines save their state in the event
+       struct, so the are not thread safe unless you lock the whole
+       component. */
+    
+    for(
+	p = icalcomponent_get_first_property(event,ICAL_ATTENDEE_PROPERTY);
+	p != 0;
+	p = icalcomponent_get_next_property(event,ICAL_ATTENDEE_PROPERTY)
+	) {
+	
+	/* Get the first ROLE parameter in the property. There should
+           only be one, so we won't bother to iterate over them. But,
+           you can iterate over parameters just like with properties */
+
+	parameter = icalproperty_get_first_parameter(p,ICAL_ROLE_PARAMETER);
+
+	/* If the parameter indicates the participant is required, get
+           the attendees name and stick a copy of it into the output
+           array */
+
+	if ( icalparameter_get_role(parameter) == ICAL_ROLE_REQPARTICIPANT) 
+	{
+	    /* Remember, the caller does not own this string, so you
+               should strdup it if you want to change it. */
+	    char *attendee = icalproperty_get_attendee(p);
+	}
+    }
+
+}
+
+/* Here is a similar example. If an attendee has a PARTSTAT of
+   NEEDSACTION or has no PARTSTAT parameter, change it to
+   TENTATIVE. */
+   
+void update_attendees(icalcomponent* event)
+{
+    icalproperty* p;
+    icalparameter* parameter;
+
+    assert(event != 0);
+    assert(icalcomponent_isa(event) == ICAL_VEVENT_COMPONENT);
+    
+    for(
+	p = icalcomponent_get_first_property(event,ICAL_ATTENDEE_PROPERTY);
+	p != 0;
+	p = icalcomponent_get_next_property(event,ICAL_ATTENDEE_PROPERTY)
+	) {
+	
+	parameter = icalproperty_get_first_parameter(p,ICAL_PARTSTAT_PARAMETER);
+
+	if (parameter == 0) {
+
+	    /* There was no PARTSTAT parameter, so add one.  */
+	    icalproperty_add_parameter(
+		p,
+		icalparameter_new_partstat(ICAL_PARTSTAT_TENTATIVE)
+		);
+
+	} else if (icalparameter_get_partstat(parameter) == ICAL_PARTSTAT_NEEDSACTION) {
+	    /* Remove the NEEDSACTION parameter and replace it with
+               TENTATIVE */
+	    
+	    icalproperty_remove_parameter(p,ICAL_PARTSTAT_PARAMETER);
+	    
+	    /* Don't forget to free it */
+	    icalparameter_free(parameter);
+
+	    /* Add a new one */
+	    icalproperty_add_parameter(
+		p,
+		icalparameter_new_partstat(ICAL_PARTSTAT_TENTATIVE)
+		);
+	}
+
+    }
+}
+
+/* Here are some examples of manipulating properties */
+
+void test_properties()
+{
+    icalproperty *prop;
+    icalparameter *param;
+    icalvalue *value;
+
+    icalproperty *clone;
+
+    /* Create a new property */
+    prop = icalproperty_vanew_comment(
+	strdup("Another Comment"),
+	icalparameter_new_cn("A Common Name 1"),
+	icalparameter_new_cn("A Common Name 2"),
+	icalparameter_new_cn("A Common Name 3"),
+       	icalparameter_new_cn("A Common Name 4"),
+	0); 
+
+    /* Iterate through all of the parameters in the property */
+    for(param = icalproperty_get_first_parameter(prop,ICAL_ANY_PROPERTY);
+	param != 0; 
+	param = icalproperty_get_next_parameter(prop,ICAL_ANY_PROPERTY)) {
+						
+	printf("Prop parameter: %s\n",icalparameter_get_cn(param));
+    }    
+
+    /* Get a string representation of the property's value */
+    printf("Prop value: %s\n",icalproperty_get_comment(prop));
+
+    /* Spit out the property in its RFC 2445 representation */
+    printf("As iCAL string:\n %s\n",icalproperty_as_ical_string(prop));
+    
+    /* Make a copy of the property. Caller owns the memory */
+    clone = icalproperty_new_clone(prop);
+
+    /* Get a reference to the value within the clone property */
+    value = icalproperty_get_value(clone);
+
+    printf("Value: %s",icalvalue_as_ical_string(value));
+
+    /* Free the original and the clone */
+    icalproperty_free(clone);
+    icalproperty_free(prop);
+
+}