From 635ad7ffb29d066ddf369cbfabf7a572df16e917 Mon Sep 17 00:00:00 2001
From: 0xFEEDC0DE64 <daniel@brunner.ninja>
Date: Sun, 31 Jan 2021 21:36:01 +0100
Subject: [PATCH] Added utility to generate random strings

---
 esputils.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/esputils.h b/esputils.h
index 0517768..f7a29c4 100644
--- a/esputils.h
+++ b/esputils.h
@@ -5,8 +5,10 @@
 #include <cstdint>
 #include <functional>
 #include <vector>
+#include <cstring>
 #include <string>
 #include <string_view>
+#include <random>
 
 /*
    Avoid "unused parameter" warnings
@@ -227,5 +229,18 @@ bool is_in(First &&first, T && ... t)
     return ((first == t) || ...);
 }
 
+std::string randomString(std::size_t length)
+{
+    static constexpr auto chars =
+        "0123456789"
+        "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+        "abcdefghijklmnopqrstuvwxyz";
+    thread_local auto rng = std::default_random_engine();
+    auto dist = std::uniform_int_distribution{{}, std::strlen(chars) - 1};
+    auto result = std::string(length, '\0');
+    std::generate_n(std::begin(result), length, [&]() { return chars[dist(rng)]; });
+    return result;
+}
+
 } // namespace
 } // namespace espcpputils