Added cli parser

1 files changed, 46 insertions, 0 deletions

diff --git a/src/main/java/com/it_jaros/networkScanner/CliParser.java b/src/main/java/com/it_jaros/networkScanner/CliParser.java
new file mode 100644
index 0000000..442e7c1
--- /dev/null
+++ b/src/main/java/com/it_jaros/networkScanner/CliParser.java
@@ -0,0 +1,46 @@
+package com.it_jaros.networkScanner;
+
+public class CliParser {
+    
+    public ScanTarget parseArgs(String[] args) {
+        if (args.length < 1 || args[0].trim().equals("")) {
+            throw new IllegalArgumentException("No argument given");
+        }
+        
+        String currentArg;
+        String target = null;
+        int socketLimit = 1000;
+        int delayInMillis = 0;
+        for (int i = 0; i < args.length; i++) {
+            currentArg = args[i];
+            if (!currentArg.startsWith("-")) {
+                target = currentArg;
+                continue;
+            }
+
+            try {
+                switch (currentArg) {
+                    case "--help", "-h":
+                        App.usageAndExit();
+                    case "--socketLimit", "-sl":
+                        socketLimit = Integer.parseInt(args[++i]);
+                        break;
+                    case "--delay", "-d":
+                        delayInMillis = Integer.parseInt(args[++i]);
+                        break;
+                    default:
+                        throw new IllegalArgumentException("No such param " + currentArg);
+                }
+            } catch (IndexOutOfBoundsException | NumberFormatException e) {
+                System.out.printf("Missing or wrong argument for option %s", currentArg);
+                System.exit(2);
+            }
+        }
+
+        System.out.printf(
+                "Scanning target '%s' with socketLimit(%s), delayInMillis(%s) \n", target, socketLimit, delayInMillis);
+        
+        return new ScanTarget(target, socketLimit, delayInMillis);
+    }
+
+}