add basic request caching with sqlite

2 files changed, 16 insertions, 1 deletions

diff --git a/include/mbgl/platform/event.hpp b/include/mbgl/platform/event.hpp
index 1676f40d2c..d2a06618a3 100644
--- a/include/mbgl/platform/event.hpp
+++ b/include/mbgl/platform/event.hpp
@@ -29,6 +29,7 @@ enum class Event : uint8_t {
     ParseStyle,
     ParseTile,
     Render,
+    Database,
     HttpRequest,
     Sprite,
 };
@@ -40,6 +41,7 @@ MBGL_DEFINE_ENUM_CLASS(EventClass, Event, {
     { Event::ParseStyle, "ParseStyle" },
     { Event::ParseTile, "ParseTile" },
     { Event::Render, "Render" },
+    { Event::Database, "Database" },
     { Event::HttpRequest, "HttpRequest" },
     { Event::Sprite, "Sprite" },
     { Event(-1), "Unknown" },
diff --git a/include/mbgl/util/filesource.hpp b/include/mbgl/util/filesource.hpp
index 18c63ddfeb..bc0a2927de 100644
--- a/include/mbgl/util/filesource.hpp
+++ b/include/mbgl/util/filesource.hpp
@@ -2,11 +2,15 @@
 #define MBGL_UTIL_FILESOURCE
 
 #include <mbgl/util/uv.hpp>
+#include <mbgl/util/noncopyable.hpp>
 
 #include <string>
 #include <memory>
 #include <functional>
 
+typedef struct sqlite3 sqlite3;
+typedef struct sqlite3_stmt sqlite3_stmt;
+
 namespace mbgl {
 
 namespace platform {
@@ -21,9 +25,10 @@ enum class ResourceType : uint8_t {
     JSON
 };
 
-class FileSource {
+class FileSource : private util::noncopyable, public std::enable_shared_from_this<FileSource> {
 public:
     FileSource();
+    ~FileSource();
 
     void setBase(const std::string &value);
     const std::string &getBase() const;
@@ -31,11 +36,19 @@ public:
     void load(ResourceType type, const std::string &url, std::function<void(platform::Response *)> callback, const std::shared_ptr<uv::loop> loop = nullptr);
 
 private:
+    void closeDatabase();
+    void createSchema();
+    bool loadFile(const std::string &url, std::function<void(platform::Response *)> callback);
+    void saveFile(const std::string &url, platform::Response *res);
+
+private:
     // Stores a URL that is used as a base for loading resources with relative path.
     std::string base;
 
     // Stores the absolute path to the cache directory.
     const std::string cache;
+
+    sqlite3 *db = nullptr;
 };
 
 }