ServerStats.java

package dashboard;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Scanner;

public class ServerStats {

    private String serverName;
    private int errorCount;
    private int queriesPerMonth;

    private static final String DELIMITER = ",";
    private static final int SERVER_LIMIT = 10;

    private ServerStats[] servers;

    public void create(String dest) {
        // Data for the CSV file
        String[] headers = {"ServerName", "ErrorCount", "QueriesPerMonth"};
        String[][] data = {
                {"Server A", "2", "1500"},
                {"Server B", "2", "2000"},
                {"Server C", "1", "1000"},
                {"Server D", "3", "1800"}
        };

        createCsvFile(dest, headers, data);

        System.out.println("monthstats.csv file created successfully.");
    }

    private static void createCsvFile(String fileName, String[] headers, String[][] data) {
        try (FileWriter writer = new FileWriter(fileName)) {
            // Write headers to the CSV file
            for (String header : headers) {
                writer.append(header).append(",");
            }
            writer.append("\n");

            // Write data to the CSV file
            for (String[] row : data) {
                for (String value : row) {
                    writer.append(value).append(",");
                }
                writer.append("\n");
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void load(String source) {
        File sourceFile = new File(source);

        try {
            Scanner sc = new Scanner(sourceFile);
            sc.useDelimiter(DELIMITER);

            // Skip the header line
            if (sc.hasNextLine()) {
                sc.nextLine();
            }

            ArrayList<ServerStats> serverList = new ArrayList<>();

            while (sc.hasNextLine() && serverList.size() < SERVER_LIMIT) {
                String line = sc.nextLine();
                // System.out.println("Line read: " + line); // Debug print

                // Split the line into individual fields using ","
                String[] fields = line.split(DELIMITER);

                // Check if the line has the expected number of fields
                if (fields.length == 3) {
                    String serverName = fields[0].trim();
                    int errorCount = Integer.parseInt(fields[1].trim());
                    int queriesPerMonth = Integer.parseInt(fields[2].trim());

                    serverList.add(new ServerStats(serverName, errorCount, queriesPerMonth));
                } else {
                    System.out.println("Error: Missing tokens in the input file. Skipping the current line.");
                }
            }

            servers = serverList.toArray(new ServerStats[0]);

            System.out.println("\nNo. of servers: " + serverList.size());

            sc.close();
        } catch (IOException e) {
            System.out.println("Error reading file: " + e.getMessage());
            e.printStackTrace();
        }
    }

    public ServerStats(String serverName, int errorCount, int queriesPerMonth) {
        this.serverName = serverName;
        this.errorCount = errorCount;
        this.queriesPerMonth = queriesPerMonth;
    }

    //appropriate constructors:
    public ServerStats() {
    }

    public ServerStats[] getServers() {
        return servers;
    }

    public String getServerName() {
        return serverName;
    }

    public int getErrorCount() {
        return errorCount;
    }

    public int getQueriesPerMonth() {
        return queriesPerMonth;
    }

    //displays graph using "|" and "*":
    public static void displayBarGraph(ServerStats[] servers) {
        System.out.println("Server Statistics Bar Graph:\n");
    
        for (ServerStats server : servers) {
            System.out.printf("%-15s | %s\n", server.getServerName(), generateBar(server.getErrorCount()));
        }
    }
    
    private static String generateBar(int count) {
        StringBuilder bar = new StringBuilder();
        for (int i = 0; i < count; i++) {
            bar.append("*");
        }
        return bar.toString();
    }
    
}