common: cloudprotocol: add desired status message

This patch adds the desired status message to the cloud protocol.
In this patch, only the unit config field of the desired status
message is added.

Signed-off-by: Mykhailo Lohvynenko <[email protected]>
Reviewed-by: Mykola Kobets <[email protected]>
Reviewed-by: Oleksandr Grytsov <[email protected]>

Author: mlohvynenko

include/aos/common/cloudprotocol/cloudmessage.hpp

@@ -10,6 +10,7 @@
 #include "aos/common/cloudprotocol/alerts.hpp"
 #include "aos/common/cloudprotocol/certificates.hpp"
 #include "aos/common/cloudprotocol/cloudprotocol.hpp"
+#include "aos/common/cloudprotocol/desiredstatus.hpp"
 #include "aos/common/cloudprotocol/envvars.hpp"
 #include "aos/common/cloudprotocol/log.hpp"
 #include "aos/common/cloudprotocol/monitoring.hpp"
@@ -28,10 +29,11 @@ static constexpr auto cProtocolVersion = 7;
 /**
  * Cloud message variant type.
  */
-using MessageVariant = Variant<Alerts, Monitoring, UnitStatus, DeltaUnitStatus, NewState, StateRequest, StateAcceptance,
-    UpdateState, RequestLog, PushLog, OverrideEnvVarsRequest, OverrideEnvVarsStatuses, RenewCertsNotification,
-    IssuedUnitCerts, IssueUnitCerts, InstallUnitCertsConfirmation, StartProvisioningRequest, StartProvisioningResponse,
-    FinishProvisioningRequest, FinishProvisioningResponse, DeprovisioningRequest, DeprovisioningResponse>;
+using MessageVariant = Variant<Alerts, Monitoring, UnitStatus, DeltaUnitStatus, DesiredStatus, NewState, StateRequest,
+    StateAcceptance, UpdateState, RequestLog, PushLog, OverrideEnvVarsRequest, OverrideEnvVarsStatuses,
+    RenewCertsNotification, IssuedUnitCerts, IssueUnitCerts, InstallUnitCertsConfirmation, StartProvisioningRequest,
+    StartProvisioningResponse, FinishProvisioningRequest, FinishProvisioningResponse, DeprovisioningRequest,
+    DeprovisioningResponse>;
 
 /**
  * Cloud message header.

include/aos/common/cloudprotocol/desiredstatus.hpp

@@ -76,6 +76,29 @@ struct UnitConfig {
     bool operator!=(const UnitConfig& other) const { return !operator==(other); }
 };
 
+/**
+ * Desired status.
+ */
+struct DesiredStatus {
+    Optional<UnitConfig> mUnitConfig;
+
+    /**
+     * Compares desired status.
+     *
+     * @param other object to compare with.
+     * @return bool.
+     */
+    bool operator==(const DesiredStatus& other) const { return mUnitConfig == other.mUnitConfig; }
+
+    /**
+     * Compares desired status.
+     *
+     * @param other object to compare with.
+     * @return bool.
+     */
+    bool operator!=(const DesiredStatus& other) const { return !operator==(other); }
+};
+
 } // namespace aos::cloudprotocol
 
 #endif