adding caching xmltv logos

Origin commit data
------------------
Branch: ni/coolstream
Commit: 3955d83961
Author: TangoCash <eric@loxat.de>
Date: 2018-09-20 (Thu, 20 Sep 2018)


------------------
No further description and justification available within origin commit message!

------------------
This commit was generated by Migit

src/driver/pictureviewer/pictureviewer.cpp

@@ -664,7 +664,7 @@ bool CPictureViewer::GetLogoName(const uint64_t& channel_id, const std::string&
 		{
 			if (!cc->getAlternateLogo().empty())
 			{
-				std::string lname = downloadUrlToRandomFile(cc->getAlternateLogo(), LOGODIR_TMP);
+				std::string lname = downloadUrlToLogo(cc->getAlternateLogo(), LOGODIR_TMP, cc->getChannelID());
 				if (width && height)
 					getSize(lname.c_str(), width, height);
 				name = lname;

src/system/helpers.cpp

@@ -1744,6 +1744,28 @@ std::string downloadUrlToRandomFile(std::string url, std::string directory, unsi
 	return url;
 }
 
+std::string downloadUrlToLogo(std::string url, std::string directory, t_channel_id channel_id)
+{
+
+	if (channel_id == 0)
+		return downloadUrlToRandomFile(url,directory);
+
+	if (strstr(url.c_str(), "://"))
+	{
+		//get channel id as string
+		char strChnId[16];
+		snprintf(strChnId, 16, "%llx", channel_id & 0xFFFFFFFFFFFFULL);
+		strChnId[15] = '\0';
+
+		std::string file = directory + "/" + strChnId + url.substr(url.find_last_of("."));
+		if (file_exists(file))
+			return file;
+		if (downloadUrl(url, file))
+			return file;
+	}
+	return url;
+}
+
 // curl
 static void *myrealloc(void *ptr, size_t size)
 {

src/system/helpers.h

@@ -36,6 +36,8 @@
 #include <curl/curl.h>
 #include <curl/easy.h>
 
+typedef uint64_t t_channel_id;
+
 int my_system(const char * cmd);
 int my_system(int argc, const char *arg, ...); /* argc is number of arguments including command */
 
@@ -166,6 +168,7 @@ bool utf8_check_is_valid(const std::string &str);
 std::string randomString(unsigned int length = 10);
 std::string randomFile(std::string suffix = "tmp", std::string directory = "/tmp", unsigned int length = 10);
 std::string downloadUrlToRandomFile(std::string url, std::string directory = "/tmp", unsigned int length = 10);
+std::string downloadUrlToLogo(std::string url, std::string directory = "/tmp", t_channel_id channel_id = 0);
 
 // curl
 struct MemoryStruct {

src/zapit/src/bouquets.cpp

@@ -1153,7 +1153,7 @@ void* CBouquetManager::LogoThread(void* _logolist)
 	{
 		CZapitChannel *cc = (*it);
 		if (cc)
-			cc->setAlternateLogo(downloadUrlToRandomFile(cc->getAlternateLogo(), LOGODIR_TMP));
+			cc->setAlternateLogo(downloadUrlToLogo(cc->getAlternateLogo(), LOGODIR_TMP, cc->getChannelID()));
 	}
 	LogoList->clear();
 	pthread_mutex_unlock(&mutex);