WiP: Building stateless backend

src/main/java/com/release11/klaus/controller/MockController.java

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+package com.release11.klaus.controller;
+
+import com.release11.klaus.model.MockedMessageDto;
+import com.release11.klaus.service.KlausService;
+import lombok.AllArgsConstructor;
+import lombok.SneakyThrows;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.UUID;
+
+@Slf4j
+@Controller
+@RequestMapping
+@AllArgsConstructor
+public class MockController {
+    private final KlausService klausService;
+    //TODO: Write a method
+    private final MockedMessageDto defaultMessage = MockedMessageDto.builder().build();
+    private UUID sessionUUID;
+    private final Set<MockedMessageDto> globalMockedMessageDtoList = new HashSet<>();
+
+
+    //TODO: Add cookie in javascript
+    /**
+     * Responds to first user request. If UUID is given then it's set if it's not, then new one is generated.
+     * Next recalls method that populates model based on UUID
+     * @param clientUUID
+     * @param uuid
+     * @return
+     */
+    @SneakyThrows
+    @GetMapping({"/mock", "/mock/{uuid}"})
+    public String showHome(@RequestParam(required = false) UUID clientUUID,
+                           @PathVariable(required = false) UUID uuid){
+        if (uuid != null) clientUUID = uuid;
+        if (clientUUID != null) sessionUUID = clientUUID;
+        else sessionUUID = UUID.randomUUID();
+        this.updateGlobalMockedMessageDtoList();
+        return "mock";
+    }
+
+
+    /**
+     * Populates model with current message list based on sessionUUID
+     */
+    private void updateGlobalMockedMessageDtoList(){
+        globalMockedMessageDtoList.clear();
+        List<MockedMessageDto> mockedMessageDtoList = klausService.getAllMockedResponses(sessionUUID);
+        if (mockedMessageDtoList.size() == 0) mockedMessageDtoList.add(defaultMessage);
+        globalMockedMessageDtoList.addAll(mockedMessageDtoList);
+    }
+
+    //TODO: Add json file
+    private static MockedMessageDto buildDefaultMessage(){
+        return null;
+    }
+
+
+}