refresh reddit token hourly

TODO

@@ -16,3 +16,4 @@ matrix:
 reddit:
 	handle imgur albums
 	handle youtube links
+	convert ampersands from 'amp&;' to '&'

include/reddit.hpp

@@ -128,6 +128,7 @@ namespace reddit{
 		void set_useragent(const raii::string_base&);
 		void set_useragent(raii::string_base&&);
 
+		void refresh_token(const auth_data& a);
 
 		post get_new_post(const raii::string_base& subreddit);
 		post get_new_post(const raii::string_base& subreddit, const raii::string_base& after);

src/raii/curler.cpp

@@ -97,7 +97,11 @@ namespace raii{
 		return curl_string(tmp, strlen(tmp));
 	}
 	curl_string curler::decode(const char* data, int* outlen, int len){
-		return curl_string(curl_easy_unescape(m_curl, data, len, outlen), *outlen);
+		if(outlen)
+			return curl_string(curl_easy_unescape(m_curl, data, len, outlen), *outlen);
+		int out;
+		char* tmp = curl_easy_unescape(m_curl, data, len, &out);
+		return curl_string(tmp, out);
 	}
 
 	CURL* curler::get(void){

src/reddit.cpp

@@ -380,6 +380,10 @@ namespace reddit{
 		m_useragent = std::move(s);
 	}
 
+	void bot::refresh_token(const auth_data& a){
+		m_access_token = _acquire_access_token(a);
+	}
+
 	post bot::get_new_post(const raii::string_base& subreddit){
 		return _get_post(subreddit, "new"_ss, "limit=1"_ss);
 	}

src/test.cpp

@@ -20,6 +20,7 @@
 #include <rjp.h>
 #include <utility> //move
 #include <tuple>
+#include <chrono>
 
 #define DBG_LEVEL_NONE    0
 #define DBG_LEVEL_NORMAL  2
@@ -362,6 +363,8 @@ int main(){
 	DEBUG_PRINT("matrix bot initialized\n");
 	auto sync_reply = matbot.sync(0); //initial sync
 	raii::string subreddit = "ProgrammerHumor";
+	auto start_time = std::chrono::system_clock::now();
+
 
 	bool should_quit = false;
 	auto sync_callback = [&](const matrix::bot& bot, const matrix::msg_info& msg)->void
@@ -381,6 +384,10 @@ int main(){
 				bot.send_message(msg.roomid, raii::string("Current subreddit is \"" + subreddit + "\""));
 			}else if(!strncmp(msg.body.get(), "!post ", 6)){
 				if(msg.body.length() > 6){
+					auto cur_time = std::chrono::system_clock::now();
+					std::chrono::duration<double> elapsed = cur_time-start_time;
+					if(elapsed.count() >= 3600)
+						redditbot.refresh_token(reddit_auth);
 					if(!strcmp(msg.body.get()+6, "hour")){
 						do_reddit_post(redditbot,bot,msg.roomid, subreddit, reddit::time::hour);
 					}else if(!strcmp(msg.body.get()+6, "day")){