add basic conversion utilities

Author: Blankscreen-exe

src/main/java/org/example/Utilities.java

@@ -1,2 +1,83 @@
-package org.example;public class Utilities {
+package org.example;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.sun.net.httpserver.Headers;
+
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+import java.net.URI;
+import java.nio.charset.StandardCharsets;
+import java.util.HashMap;
+import java.util.Map;
+
+public class Utilities {
+
+    public String ConvertMapToJson(Map<String, Object> map) throws JsonProcessingException {
+
+        ObjectMapper objectMapper = new ObjectMapper();
+        return objectMapper.writeValueAsString(map);
+    }
+
+    public String ReqBodyToByteArray(InputStream requestBody) throws Exception {
+
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        byte[] buffer = new byte[1024];
+        int bytesRead = -1;
+        while ((bytesRead = requestBody.read(buffer)) != -1) {
+            baos.write(buffer, 0, bytesRead);
+        }
+
+        String responseBodyString = baos.toString(StandardCharsets.UTF_8);
+
+        return responseBodyString;
+    }
+
+    public Map QueryParamsToMap(String query) {
+        // parsing query parameters
+        Map<String, String> queryParamsMap = new HashMap<>();
+        if (query != null) {
+            String[] queryParams = query.split("&");
+            for (String param : queryParams) {
+                String[] keyValue = param.split("=");
+                if (keyValue.length == 2) {
+                    queryParamsMap.put(keyValue[0], keyValue[1]);
+                }
+            }
+        }
+
+        return queryParamsMap;
+    }
+
+    public Map QueryHeadersToMap(Headers requestHeaders) {
+        Map<String, String> headerParamsMap = new HashMap<>();
+        for (String header : requestHeaders.keySet()) {
+            headerParamsMap.put(header, requestHeaders.get(header).get(0));
+        }
+
+        return headerParamsMap;
+    }
+
+    public String GetJSONResponse(String requestMethod, Headers requestHeaders, String responseBodyString, String query, String path) throws JsonProcessingException {
+        // Mapping each element to a key
+        Map<String, Object> parsedBodyMap = new HashMap<>();
+
+        // parsing header parameters
+        Map headerParamsMap = QueryHeadersToMap(requestHeaders);
+
+        // parsing query parameters
+        Map queryParamsMap = QueryParamsToMap(query);
+
+        // adding elements to parsedBodyMap
+        parsedBodyMap.put("request method", requestMethod);
+        parsedBodyMap.put("request body", responseBodyString);
+        parsedBodyMap.put("header params", headerParamsMap);
+        parsedBodyMap.put("query params", queryParamsMap);
+        parsedBodyMap.put("query path", path);
+
+        // converting parsedBodyMap to JSON string
+        String jsonStr = ConvertMapToJson(parsedBodyMap);
+
+        return jsonStr;
+    }
 }