chore: implement event serialization

src/env/application/presenter/event/serialization/EventSerializerImpl.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2023. Smart Operating Block
+ *
+ * Use of this source code is governed by an MIT-style
+ * license that can be found in the LICENSE file or at
+ * https://opensource.org/licenses/MIT.
+ */
+
+package application.presenter.event.serialization;
+
+import application.presenter.event.model.Event;
+import application.presenter.event.model.automation.proposal.MedicalTechnologyAutomationProposalEvent;
+import com.google.gson.Gson;
+import com.google.gson.reflect.TypeToken;
+
+import java.lang.reflect.Type;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+
+/**
+ * Implementation of the {@link EventSerializer} interface that allows an event to be
+ * serialized to String.
+ */
+public class EventSerializerImpl implements EventSerializer {
+    private final Map<String, Type> typeMap = new HashMap<>();
+
+    /**
+     * Default constructor.
+     */
+    public EventSerializerImpl() {
+        this.typeMap.put(
+                MedicalTechnologyAutomationProposalEvent.MEDICAL_TECHNOLOGY_AUTOMATION_PROPOSAL_EVENT_KEY,
+                new TypeToken<MedicalTechnologyAutomationProposalEvent>() { }.getType()
+        );
+    }
+
+    @Override
+    public final Optional<String> eventToString(final Event<?> eventToSerialize) {
+        return Optional.of(eventToSerialize.getKey())
+                .filter(this.typeMap::containsKey)
+                .map(key -> new Gson().toJson(eventToSerialize, this.typeMap.get(key)));
+    }
+}