1 files changed, 54 insertions, 0 deletions
diff --git a/include/Cache.hpp b/include/Cache.hpp
new file mode 100644
index 0000000..89abe2c
--- /dev/null
+++ b/include/Cache.hpp
@@ -0,0 +1,54 @@
+#pragma once
+
+#include <boost/filesystem/path.hpp>
+#include <SFML/Graphics/Texture.hpp>
+#include <string>
+#include <thread>
+#include <mutex>
+#include <vector>
+
+namespace TinyProcessLib
+{
+    class Process;
+}
+
+namespace dchat
+{
+    struct ImageByUrlResult
+    {
+        enum class Type
+        {
+            CACHED,
+            DOWNLOADING,
+            FAILED_DOWNLOAD
+        };
+        
+        // @texture is null if @type is DOWNLOADING or FAILED_DOWNLOAD
+        const sf::Texture *texture;
+        Type type;
+    };
+    
+    class Cache
+    {
+    public:
+        Cache();
+        
+        // Creates directory if it doesn't exist (recursively). Throws boost exception on failure
+        static boost::filesystem::path getDchatDir();
+        
+        // Get cached image or downloads it. 
+        // Default download file limit is 12MB
+        // Returns ImageByUrlResult describing texture status.
+        const ImageByUrlResult getImageByUrl(const std::string &url, int downloadLimitBytes = 12582912);
+    private:
+        struct ImageDownloadInfo
+        {
+            TinyProcessLib::Process *process;
+            std::string url;
+        };
+        
+        std::thread downloadWaitThread;
+        std::vector<ImageDownloadInfo> imageDownloadProcesses;
+        std::mutex imageDownloadMutex;
+    };
+}