enhance logging and fix Null pointer exception at wifi Null

src/main/java/com/safeqr/app/gmail/controller/GmailController.java

@@ -104,7 +104,7 @@ public class GmailController {
 
     @GetMapping(value = API_URL_GMAIL_GET_SCANNED_EMAILS, produces = MediaType.APPLICATION_JSON_VALUE)
     public ResponseEntity<ScannedGmailResponseDto> getUserScannedEmails(@RequestHeader(name = "X-USER-ID") String userId) {
-        logger.info("Invoking GET User scanned Emails endpoint");
+        logger.info("User Id Invoking GET User scanned Emails endpoint: {}", userId);
         return ResponseEntity.ok(gmailService.fetchScannedGmail(userId));
     }
     @GetMapping(value = API_URL_GMAIL_GET_EMAILS, produces = MediaType.APPLICATION_JSON_VALUE)
@@ -112,7 +112,7 @@ public class GmailController {
                                            @RequestHeader(name = "refreshToken") String refreshToken,
                                            @RequestHeader(name = "X-USER-ID") String userId
                                            )  {
-        logger.info("Invoking GET Scan User Emails endpoints");
+        logger.info("User Id Invoking GET Scan User Emails endpoints: {}", userId);
         if (accessToken == null || accessToken.isEmpty()) {
             return new ResponseEntity<>("Access token is missing", HttpStatus.BAD_REQUEST);
         }

src/main/java/com/safeqr/app/qrcode/controller/QRCodeTypeController.java

@@ -52,7 +52,7 @@ public class QRCodeTypeController {
     @PostMapping(value = API_URL_QRCODE_SCAN, produces = MediaType.APPLICATION_JSON_VALUE)
     public ResponseEntity<BaseScanResponse> scanQRCode(@RequestBody QRCodePayload payload,
                                                        @RequestHeader(required = false, name = HEADER_USER_ID) String userId) {
-        logger.info("Invoking scan endpoint");
+        logger.info("User Id Invoking scan endpoint: {}", userId);
         return ResponseEntity.ok(qrCodeTypeService.scanQRCode(userId, payload));
     }
 

src/main/java/com/safeqr/app/qrcode/entity/WifiEntity.java

@@ -2,6 +2,7 @@ package com.safeqr.app.qrcode.entity;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
 
+import com.fasterxml.jackson.annotation.JsonInclude;
 import jakarta.persistence.*;
 import lombok.AllArgsConstructor;
 import lombok.Data;
@@ -31,6 +32,7 @@ public class WifiEntity {
 
     private String ssid;
     private String password;
+    @JsonInclude(JsonInclude.Include.NON_EMPTY)
     private String encryption;
     private boolean hidden;
 }

src/main/java/com/safeqr/app/qrcode/service/WifiVerificationService.java

@@ -60,6 +60,11 @@ public class WifiVerificationService {
     }
 
     public String getClassification(String encryptionType) {
+        // Check if encryptionType is null
+        if (encryptionType == null) {
+            return CLASSIFY_UNSAFE;
+        }
+
         if (encryptionType.equalsIgnoreCase("WPA") ||
                 encryptionType.equalsIgnoreCase("WPA2") ||
                 encryptionType.equalsIgnoreCase("WPA3")) {

src/main/java/com/safeqr/app/user/controller/UserController.java

@@ -37,49 +37,49 @@ public class UserController {
 
     @GetMapping(value = API_URL_USER_GET, produces = MediaType.APPLICATION_JSON_VALUE)
     public ResponseEntity<UserResponseDto> getUser(@RequestHeader(name = HEADER_USER_ID) String userId) {
-        logger.info("Invoking GET User endpoint");
+        logger.info("User Id Invoking GET User endpoint: {}", userId);
         return ResponseEntity.ok(userService.getUserById(userId));
     }
 
     @GetMapping(value = API_URL_USER_GET_SCANNED_HISTORIES, produces = MediaType.APPLICATION_JSON_VALUE)
     public ResponseEntity<List<ScannedHistoriesDto>> getUserScannedHistories(@RequestHeader(name = HEADER_USER_ID) String userId) {
-        logger.info("Invoking GET User Scanned Histories endpoint");
+        logger.info("User Id Invoking GET User Scanned Histories endpoint: {}", userId);
         return ResponseEntity.ok(userService.getUserScannedHistories(userId));
     }
 
     @PutMapping(value = API_URL_USER_DELETE_SCANNED_HISTORIES, produces = MediaType.APPLICATION_JSON_VALUE)
     public ResponseEntity<BaseResponse> deleteScannedHistory(@RequestHeader(name = HEADER_USER_ID) String userId, @RequestBody BookmarkRequestDto bookmarkRequestDto) {
-        logger.info("Invoking PUT Delete Single Scanned History endpoint");
+        logger.info("User Id Invoking PUT Delete Single Scanned History endpoint: {}", userId);
         return ResponseEntity.ok(userService.deleteScannedHistory(userId, bookmarkRequestDto.getQrCodeId()));
     }
 
     @PutMapping(value = API_URL_USER_DELETE_ALL_SCANNED_HISTORIES, produces = MediaType.APPLICATION_JSON_VALUE)
     public ResponseEntity<BaseResponse> deleteAllScannedHistories(@RequestHeader(name = HEADER_USER_ID) String userId) {
-        logger.info("Invoking PUT Delete All Scanned Histories endpoint");
+        logger.info("User Id Invoking PUT Delete All Scanned Histories endpoint: {}", userId);
         return ResponseEntity.ok(userService.deleteAllScannedHistoriesByUserId(userId));
     }
 
     @GetMapping(value = API_URL_USER_GET_BOOKMARKS, produces = MediaType.APPLICATION_JSON_VALUE)
     public ResponseEntity<List<ScannedHistoriesDto>> getUserBookmarks(@RequestHeader(name = HEADER_USER_ID) String userId) {
-        logger.info("Invoking GET User bookmarks endpoint");
+        logger.info("User Id Invoking GET User bookmarks endpoint: {}", userId);
         return ResponseEntity.ok(userService.getUserBookmarks(userId));
     }
 
     @PostMapping(value = API_URL_USER_SET_BOOKMARK, produces = MediaType.APPLICATION_JSON_VALUE)
     public ResponseEntity<BaseResponse> setBookmark(@RequestHeader(name = HEADER_USER_ID) String userId, @RequestBody BookmarkRequestDto bookmarkRequestDto) {
-        logger.info("Invoking POST User bookmark endpoint");
+        logger.info("User Id Invoking POST User bookmark endpoint: {}", userId);
         return ResponseEntity.ok(userService.setBookmark(userId, bookmarkRequestDto.getQrCodeId()));
     }
 
     @PutMapping(value = API_URL_USER_DELETE_BOOKMARK, produces = MediaType.APPLICATION_JSON_VALUE)
     public ResponseEntity<BaseResponse> deleteBookmark(@RequestHeader(name = HEADER_USER_ID) String userId, @RequestBody BookmarkRequestDto bookmarkRequestDto) {
-        logger.info("Invoking PUT Delete Single Bookmark endpoint");
+        logger.info("User Id Invoking PUT Delete Single Bookmark endpoint: {}", userId);
         return ResponseEntity.ok(userService.deleteBookmark(userId, bookmarkRequestDto.getQrCodeId()));
     }
 
     @PutMapping(value = API_URL_USER_DELETE_ALL_BOOKMARK, produces = MediaType.APPLICATION_JSON_VALUE)
     public ResponseEntity<BaseResponse> deleteAllBookmark(@RequestHeader(name = HEADER_USER_ID) String userId) {
-        logger.info("Invoking PUT Delete All Bookmark endpoint");
+        logger.info("User Id Invoking PUT Delete All Bookmark endpoint: {}", userId);
         return ResponseEntity.ok(userService.deleteAllBookmarkByUserId(userId));
     }
 }