Support optional conditions on creating fans

This adds the functional infrastructure to optionally attach a condition
function to a fan definition. When a condition is defined on a fan, it
must be true for a fan's associated functional properties to be created.
When the given condition fails, that fan's functional properties will
not be created by fan monitor. A fan without a defined condition will
have all of its associated functional properties created.

Example of generated condition (generation commit to follow):

make_condition(condition::propertiesMatch(
    std::vector<PropertyState>{
        PropertyState{
            PropertyIdentity{
                "/xyz/openbmc_project/inventory/system/chassis",
                "xyz.openbmc_project.Inventory.Decorator.CoolingType",
                "WaterCooled"
            },
            static_cast<bool>(false)
        }
    }
)),

Tested:
    Fan functional properties are not created when a condition fails
    Fan functional properties are created when condition passes
    Fan functional properties are created when no condition exists

Change-Id: I9ced2e520d2f97e6655c9417970b3e976d78fef4
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/monitor/Makefile.am b/monitor/Makefile.am
index 8eda1e0..bea0933 100644
--- a/monitor/Makefile.am
+++ b/monitor/Makefile.am
@@ -8,7 +8,8 @@ phosphor_fan_monitor_SOURCES = \
 	argument.cpp \
 	fan.cpp \
 	main.cpp \
-	tach_sensor.cpp
+	tach_sensor.cpp \
+	conditions.cpp
 
 nodist_phosphor_fan_monitor_SOURCES = \
 	fan_monitor_defs.cpp