migrate to c++, all layers done except for data access

cli/parser.cpp

@@ -0,0 +1,62 @@
+#include <cstring>
+#include <iostream>
+#include <stdlib.h>
+#include <string>
+
+#include "include/parser.h"
+#include "include/handler.h"
+
+using namespace std;
+
+void show_usage() {
+    cout << "usage:\n" 
+            "these env vars have to be set: FRONTEND_API_KEY, DB_URL"
+            "tickets create <title> <description>\n"
+            "tickets list [-status <status>]\n"
+            "tickets detail <id>" << endl;
+}
+
+#define show_usage_and_die() show_usage(); return 1;
+
+int parse_args(Dao *dao, int argc, char *argv[]) {
+    if (argc == 1) { // not enough args
+        show_usage_and_die();
+    }
+
+    if (strcmp(argv[1], "create") == 0) { // creating a ticket
+        if (argc != 4) {
+            show_usage_and_die();
+        }
+
+        return handle_create(dao, argv[2], argv[3]); // title and description
+    }
+
+
+    if (strcmp(argv[1], "list") == 0) { // listing tickets (optional filter by status)
+        if (argc != 2 || argc != 4) {
+            show_usage_and_die();
+        }
+
+        if (argc == 4) {
+            if (strcmp(argv[2], "-status") == 0) {
+                return handle_list(dao, argv[3]); // the status text
+            }
+        }
+
+        // now we know that argc == 2
+        // -> handle list (get all tickets)
+        return handle_list(dao);
+    }
+
+    if (strcmp(argv[1], "detail") == 0) {
+        if (argc != 3) {
+            show_usage_and_die();
+        }
+
+        int ticket_id = atoi(argv[2]);
+
+        return handle_detail(dao, ticket_id); // ticket id
+    }
+
+    return 0;
+}