added getRandomEmoji

Author: tomasmark79

src/Emoji/Emoji.cpp

@@ -3,6 +3,7 @@
 #include <cassert>
 #include <cctype>
 #include <fstream>
+#include <random>
 #include <regex>
 
 namespace dotnamecpp::emoji {
@@ -21,6 +22,25 @@ namespace dotnamecpp::emoji {
 
   Emoji::~Emoji() {}
 
+  std::string Emoji::getRandomEmoji() {
+    // modern C++ way to generate random number
+    std::random_device rd;
+    std::mt19937 gen(rd());
+    std::uniform_int_distribution<> dis(0, emojiMap_.size() - 1);
+
+    if (emojiMap_.empty()) {
+      return getEmoji();
+    }
+    auto it = emojiMap_.begin();
+    std::advance(it, dis(gen));
+    const auto &emojiEntry = it->first;
+    char8_t buffer[kMaxBufferSize];
+    char8_t *end = encodeUtf8Sequence(reinterpret_cast<const char32_t *>(emojiEntry.c_str()),
+                                      emojiEntry.size(), buffer);
+    *end = '\0';
+    return std::string(reinterpret_cast<char *>(buffer));
+  }
+
   std::string Emoji::getEmoji() { return "😀"; }
 
   std::string Emoji::getEmoji(char32_t *code, size_t totalCodePoints) {

src/Emoji/Emoji.hpp

@@ -22,6 +22,7 @@ namespace dotnamecpp::emoji {
 
     std::map<std::u32string, EmojiMap> emojiMap_;
 
+    std::string getRandomEmoji();
     std::string getEmoji();
     std::string getEmoji(char32_t *code, size_t totalCodePoints);
     std::string getEmoji(int32_t *code, size_t totalCodePoints);

src/EmojiModuleLib.cpp

@@ -14,7 +14,8 @@ namespace dotnamecpp::v1 {
 
     emoji_ = std::make_unique<dotnamecpp::emoji::Emoji>(utilsComponents);
     emoji_->emojiChainTest<false>();
-    logger_->infoStream() << "Static emoji: " << emoji_->getEmoji();
+    logger_->infoStream() << "Static emoji: " << emoji_->getEmoji() << ", Random emoji: "
+                          << emoji_->getRandomEmoji();
 
     logger_->infoStream() << libName_ << " initialized ...";
     isInitialized_ = true;