machine coding splitwise 2hrs

LowLevelDesign/SplitwiseApplication/README.md

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+Design a system that allows for the addition of expenses and split the sam among multiple users or within a group.
+
+Mandatory Requirements:
+
+Create a group. A group can contain two or more users.
+Split expenses between users( they may not be a part of a group) or in a group.
+The strategy of splitting the amount should be extensible. You can implement equal splitting.
+Able to see the pending credit or pending debit in a group or between users. (Let's say between A and B who is going to pay which user and the amount)
+Can view the transaction details ( All the expenses which got added) in a group or peer-to-peer.
+Bonus points:
+
+Simplify debts ( Let’s say A has to pay 30 to B, B has to pay 30 to C, then in simplify debt view, A has to pay 30 to C directly instead of B ).
+
+Guidelines:
+
+Use any IDE
+Write a driver class for demo purposes. Which will execute all the commands in one place in the code and have test cases.
+You can print the output in the console. Do not create any UI for the application.
+Please prioritize code compilation, execution, and completion
+Work on the expected output first and then add bonus features last.
+Expectations:
+
+Your code should cover all the mandatory functionalities explained above.
+Your code should be executable and clean.
+Your code should be properly refactored, and exceptions should be gracefully handled.
+Please add any assumptions taken in a README file.
+How will you be evaluated?
+
+Code should be working.
+Code readability and testability
+Separation Of Concerns
+Object-Oriented concepts.
+Language proficiency.
+Scalability
+Test Coverage
+Concurrency handling(Bonus Points)

LowLevelDesign/SplitwiseApplication/SplitwiseApplication.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

LowLevelDesign/SplitwiseApplication/src/Driver.java

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+import dao.SplitWiseBalanceManager;
+import model.account.Group;
+import model.account.User;
+import model.expense.ExpenseType;
+import model.split.EqualSplit;
+import model.split.Split;
+import service.GroupService;
+import service.SplitWiseService;
+import service.UserService;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Driver {
+    public static void main(String[] args) {
+        System.out.println("SplitWise Application!!!");
+
+        SplitWiseBalanceManager splitWiseBalanceManager = SplitWiseBalanceManager.getSplitWiseBalanceManagerInstance();
+        UserService userService = new UserService(splitWiseBalanceManager);
+        GroupService groupService = new GroupService(splitWiseBalanceManager);
+        SplitWiseService splitWiseService = new SplitWiseService(splitWiseBalanceManager);
+
+        //create users
+        User user1 = userService.addUser("Mandeep");
+        User user2 = userService.addUser("Sandeep");
+        User user3 = userService.addUser("Bob");
+        User user4 = userService.addUser("Alice");
+
+
+        //Create Expense 1
+        Split split1 = new EqualSplit(user1);
+        Split split2 = new EqualSplit(user2);
+        Split split3 = new EqualSplit(user3);
+        List<Split> splitListForExpense1 = new ArrayList<>(List.of(split1, split2, split3));
+        splitWiseService.addExpense(ExpenseType.EQUAL, 900, "Mandeep",
+                splitListForExpense1, "Expense Number 1",
+                List.of("Mandeep", "Sandeep","Bob"));
+
+        //Display balance for users
+        splitWiseService.showUserExpenses("Mandeep");
+        splitWiseService.showUserExpenses("Alice");
+        splitWiseService.showUserExpenses("Bob");
+
+        //group Expense
+
+        //create group
+        Group group1 = groupService.addGroup("MyTestGroup", List.of("Mandeep","Bob"),
+                "This group is created for testing");
+
+        splitWiseService.addExpense(ExpenseType.EQUAL, 900, "Mandeep",
+                splitListForExpense1, "Expense Number 1",
+                List.of("Mandeep", "Sandeep","Bob"), "MyTestGroup");
+
+        //Get Group Expense
+        splitWiseService.showGroupExpense("MyTestGroup");
+
+
+        //List all expenses
+        splitWiseService.showAllExpenses();
+
+    }
+}