Untitled

package helloWorld;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class HWD {

	public static Set<String> calculateLoyalCustomers(String logFile1, String logFile2) {
//		List<String> result = new ArrayList<>();
		Set<String> res = new HashSet<>();
		String[] file1 = logFile1.split("\n");
		String[] file2 = logFile2.split("\n");
		
		
		for(int i=0; i<file1.length; i++) {
//			System.out.println("File1: "+file1[i]);
					
			String cust1[] = new String[3];
			cust1 = file1[i].split(",");
			String pageId = cust1[0];
			String custId = cust1[1];
			
//			System.out.println("pageId: "+pageId);
//			System.out.println("custId: "+custId);
			for(int j=0; j<file2.length; j++) {
//				System.out.println("File2: "+file2[j]);
				
				String cust2[] = new String[3];
				cust2 = file2[j].split(",");
				
				
//				System.out.println("custId/cust2[1]: "+cust2[1]);
//				System.out.println("pageId/cust2[0]: "+cust2[0]);
				 if(custId.equals(cust2[1]) && pageId != cust2[0]) {
//					 System.out.println("Inside if");
					 res.add(custId);
				 }		
			}
		}
	
		return res;
	}
	//TC: O(N)
//	SC: 
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		//Calculating Loyal Users Via Log Files : 
//		Our website abc.com is generating log files for each day having lines that look like
//		[pageId, customerId, timestamp]
//		Our job is given 2 logs files for day1 and day2 we have to figure out the most loyal cusomters having the following properties
//		= customer should have visited the website on both days
//		= cusomter should have visited atleast 2 unique pages
//		Focus on writing the method
//		=== calculateLoyalCustomers(logFile1, logFile2) ===
		

		String logFile1 = """
			      page1,customer1,time1
			      page1,customer2,time2
			      page2,customer1,time3
			      page1,customer1,time5
			      page4,customer2,time4
			      """;

			  String logFile2 = """
			      page1,customer3,time1
			      page1,customer4,time2
			      page5,customer5,time3
			      page1,customer2,time4
			      """;
			  
		Set<String> output = HWD.calculateLoyalCustomers(logFile1, logFile2);
//		for(int i=0; i<output.size(); i++) {
			System.out.println(output);
//		}
		//log file 1
//		[1, 1, 9.00]
//		[1, 1, 10.00]
//		[2, 2, 8.00]
				
		//file 2
//				[1, 1, 8.00]
//				[2, customerId, timestamp]
//				[3, customerId, timestamp]
				

	}

}