Added interval argument (-i/--interval)

main.cpp

@@ -1,17 +1,44 @@
 #include <QApplication>
+#include <QString>
 #include <iostream>
+#include <limits>
 #include "spacetray.h"
 
 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
 
-    if (argc != 2) {
-        std::cerr << "Usage: " << argv[0] << " <statusurl>" << std::endl;
+    if (argc != 2 && argc != 4) {
+        std::cerr << "Usage: " << argv[0]
+                  << " <statusurl> [-i|--interval <seconds>]\n       " << argv[0]
+                  << " [-i|--interval <seconds>] <statusurl>" << std::endl;
         return 1;
     }
 
-    SpaceTray tray(argv[1]);
+    QString statusUrl;
+    int intervalSeconds = 300;
+    if (argc == 4) {
+        const QString firstArgument = QString::fromLocal8Bit(argv[1]);
+        const bool intervalFirst = firstArgument == "-i" || firstArgument == "--interval";
+        const QString option = intervalFirst ? firstArgument : QString::fromLocal8Bit(argv[2]);
+        const QString intervalArgument = QString::fromLocal8Bit(argv[intervalFirst ? 2 : 3]);
+        bool validInterval = false;
+        const qlonglong parsedInterval = intervalArgument.toLongLong(&validInterval);
+        const qlonglong maximumSeconds = std::numeric_limits<int>::max() / 1000;
+
+        if ((option != "-i" && option != "--interval") ||
+            !validInterval || parsedInterval <= 0 || parsedInterval > maximumSeconds) {
+            std::cerr << "Invalid interval. Use -i or --interval followed by a positive number of seconds."
+                      << std::endl;
+            return 1;
+        }
+        intervalSeconds = static_cast<int>(parsedInterval);
+        statusUrl = QString::fromLocal8Bit(argv[intervalFirst ? 3 : 1]);
+    } else {
+        statusUrl = QString::fromLocal8Bit(argv[1]);
+    }
+
+    SpaceTray tray(statusUrl, intervalSeconds);
 
     return app.exec();
 }