Merge pull request #1 from lfsrrr/add-function

app function to Main.java

Author: lfsrrr

src/Main.java

@@ -1,5 +1,52 @@
+import java.io.BufferedReader;
+import java.io.FileWriter;
+import java.io.InputStreamReader;
+import java.io.IOException;
+import java.util.Scanner;
+
 public class Main {
     public static void main(String[] args) {
-        System.out.println("Hello world!");
+        Scanner scanner = new Scanner(System.in);  // Create a Scanner object
+        System.out.println("Enter Studiengang:");
+        String studiengang = scanner.nextLine();  // Read user input
+
+        // Construct the curl command using the user input
+        String[] curlCommand = {
+                "curl",
+                "-X", "GET",
+                "https://raumzeit.hka-iwi.de/api/v1/timetables/public/" + studiengang,
+                "-H", "accept: text/calendar"
+        };
+
+        try {
+            // Execute the curl command using ProcessBuilder
+            ProcessBuilder processBuilder = new ProcessBuilder(curlCommand);
+            Process process = processBuilder.start();
+
+            // Read the output of the curl command
+            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
+            StringBuilder output = new StringBuilder();
+            String line;
+
+            while ((line = reader.readLine()) != null) {
+                output.append(line).append("\n");
+            }
+
+            // Wait for the process to complete
+            int exitCode = process.waitFor();
+            if (exitCode == 0) {
+                // Write the API response to a .ics file
+                String fileName = studiengang + ".ics";
+                try (FileWriter fileWriter = new FileWriter(fileName)) {
+                    fileWriter.write(output.toString());
+                    System.out.println("API response saved to " + fileName);
+                }
+            } else {
+                System.err.println("Error: API call failed with exit code " + exitCode);
+            }
+
+        } catch (IOException | InterruptedException e) {
+            e.printStackTrace();  // Handle any exceptions
+        }
     }
 }