Fees and structures added

src/main/java/com/rit/whatsapp/service/SessionService.java

@@ -42,6 +42,14 @@ public class SessionService {
         userStates.put(phoneNumber, state);
     }
     
+    public boolean isSessionCached(String phoneNumber) {
+        return sessionTokens.containsKey(phoneNumber);
+    }
+
+    public boolean hasSavedCredentials(String phoneNumber) {
+        return userRepository.existsById(phoneNumber);
+    }
+
     public void resetState(String phoneNumber) {
         userStates.remove(phoneNumber);
     }
@@ -104,6 +112,20 @@ public class SessionService {
         return name;
     }
 
+    private final Map<String, Map<String, String>> receiptIdMappings = new ConcurrentHashMap<>();
+
+    public void storeReceiptIdMappings(String phoneNumber, Map<String, String> mappings) {
+        receiptIdMappings.put(phoneNumber, mappings);
+    }
+
+    public String getReceiptIdMapping(String phoneNumber, String shortId) {
+        Map<String, String> mappings = receiptIdMappings.get(phoneNumber);
+        if (mappings != null) {
+            return mappings.get(shortId);
+        }
+        return null;
+    }
+
     public void setTempLoginId(String phoneNumber, String tempId) {
         temporaryLoginIds.put(phoneNumber, tempId);
     }