control: Add set target on missing owner action

Add the YAML based set_speed_on_missing_owner action function as an
action class for JSON configs to use.

Change-Id: Iebe0cc7bbaf063ef33ca0b918dd1d8576e2425eb
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
diff --git a/control/json/actions/missing_owner_target.cpp b/control/json/actions/missing_owner_target.cpp
new file mode 100644
index 0000000..3cbd8a1
--- /dev/null
+++ b/control/json/actions/missing_owner_target.cpp
@@ -0,0 +1,72 @@
+/**
+ * Copyright © 2021 IBM Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "missing_owner_target.hpp"
+
+#include "../manager.hpp"
+#include "../zone.hpp"
+#include "group.hpp"
+
+#include <fmt/format.h>
+
+#include <nlohmann/json.hpp>
+#include <phosphor-logging/log.hpp>
+
+#include <algorithm>
+
+namespace phosphor::fan::control::json
+{
+
+using json = nlohmann::json;
+using namespace phosphor::logging;
+
+MissingOwnerTarget::MissingOwnerTarget(const json& jsonObj) :
+    ActionBase(MissingOwnerTarget::name)
+{
+    setTarget(jsonObj);
+}
+
+void MissingOwnerTarget::run(Zone& zone, const Group& group)
+{
+    const auto& members = group.getMembers();
+    auto isMissingOwner =
+        std::any_of(members.begin(), members.end(),
+                    [&intf = group.getInterface()](const auto& member) {
+                        return !Manager::hasOwner(member, intf);
+                    });
+    if (isMissingOwner)
+    {
+        zone.setTarget(_target);
+    }
+    // Update group's fan control active allowed based on action results
+    zone.setActiveAllow(group.getName(), !isMissingOwner);
+}
+
+void MissingOwnerTarget::setTarget(const json& jsonObj)
+{
+    if (!jsonObj.contains("speed"))
+    {
+        log<level::ERR>(
+            fmt::format("Action {}: Missing required speed value", getName())
+                .c_str(),
+            entry("JSON=%s", jsonObj.dump().c_str()));
+        throw std::runtime_error(
+            fmt::format("Action {}: Missing required speed value", getName())
+                .c_str());
+    }
+    _target = jsonObj["speed"].get<uint64_t>();
+}
+
+} // namespace phosphor::fan::control::json