Implement relevant methods for DataIngestionLayer

GCryptCLI/include/DataIngestionLayer.h

@@ -1,9 +1,11 @@
 #ifndef GCRYPTCLI_DATAINGESTIONLAYER_H
 #define GCRYPTCLI_DATAINGESTIONLAYER_H
 
-#include <istream>
-#include <fstream>
-#include <sstream>
+#include <iosfwd>
+#include <queue>
+#include <GCrypt/Block.h>
+
+using namespace Leonetienne::GCrypt;
 
 namespace IO {
 
@@ -13,6 +15,19 @@ namespace IO {
       //! Will initialize the ingestion
       static void Init();
 
+      //! Will attempt to read a data block.
+      //! Requires Init() to have been called
+      static void ReadBlock();
+
+      //! Have we read in all available blocks?
+      static bool ReachedEOF();
+
+      //! Will return true if there is at least one block to be GetBlock()'ed
+      static bool IsBlockReady();
+
+      //! Will return the next block in the queue
+      static Block GetNextBlock();
+
     private:
       static std::istream* in;
 
@@ -21,6 +36,14 @@ namespace IO {
       // We still have to CLOSE the file handle afterwards!
       static std::ifstream ifs;
       static std::istringstream iss;
+
+      // Indicates whether EOF has been reached
+      static bool reachedEof;
+      // Indicates whether this class is initialized
+      static bool initialized;
+
+      // All read blocks, that haven't been given out yet
+      static std::queue<Block> blocks;
   };
 }