Change to use fmt::format and fmt::localtime instead of localtime

Credits: otland/forgottenserver#4249

src/utils/tools.cpp

@@ -23,6 +23,8 @@
 
 #include "utils/tools.h"
 
+#include <fmt/chrono.h>
+
 void printXMLError(const std::string& where, const std::string& fileName, const pugi::xml_parse_result& result)
 {
 	SPDLOG_ERROR("[{}] Failed to load {}: {}", where, fileName, result.description());
@@ -368,32 +370,12 @@ std::string convertIPToString(uint32_t ip)
 
 std::string formatDate(time_t time)
 {
-	const tm* tms = localtime(&time);
-	if (!tms) {
-		return {};
-	}
-
-	char buffer[20];
-	int res = sprintf(buffer, "%02d/%02d/%04d %02d:%02d:%02d", tms->tm_mday, tms->tm_mon + 1, tms->tm_year + 1900, tms->tm_hour, tms->tm_min, tms->tm_sec);
-	if (res < 0) {
-		return {};
-	}
-	return {buffer, 19};
+	return fmt::format("{:%d/%m/%Y %H:%M:%S}", fmt::localtime(time));
 }
 
 std::string formatDateShort(time_t time)
 {
-	const tm* tms = localtime(&time);
-	if (!tms) {
-		return {};
-	}
-
-	char buffer[12];
-	size_t res = strftime(buffer, 12, "%d %b %Y", tms);
-	if (res == 0) {
-		return {};
-	}
-	return {buffer, 11};
+	return fmt::format("{:%Y-%m-%d %X}", fmt::localtime(time));
 }
 
 std::time_t getTimeNow() {