/// <summary>
/// <c>PixelManager</c> initiliser, creates the class and returns it.
/// </summary>
/// <para>
/// It should be noted that if the action was created under encoding then it will generate 1000 random pixels to use.
/// </para>
/// <param name="manager">The parent manager <c>SteganographyManager</c> or any children.</param>
public PixelManager(SteganographyManager manager)
{
Console.WriteLine("Initialising pixel manager.");
parent = manager;
//Setup Class Params
setupClass();
if (parent.getAction() == SteganographyManager.Action.Encoding)
{
//Setup Manager For Each Letter
setupHexCharacters();
//Choose Initial Pixels
Console.WriteLine("Choosing 1000 random pixels (this may increase later on).");
addPixels(1000);
Console.WriteLine("");
}
valid = true;
}
/// <summary>
/// Constructor for the <c>StegFileManager</c> class, which will open/create the file and the relevant streamers.
/// There are four possible different actions which can be taked.
/// 1. Decoding Mode - Read File
/// 2. Decoding Mode - Write File
/// 3. Encoding Mode - Read File
/// 4. Encoding Mode - Write File
/// </summary>
/// <param name="parent">The parent <c>SteganographyManager</c> class.</param>
/// <param name="type">Type of file (read or write).</param>
/// <param name="location">Location of the file to be read / written to.</param>
public StegFileManager(SteganographyManager parent, FileType type, string location)
{
parentAction = parent.getAction();
action = type;
switch (parentAction)
{
case SteganographyManager.Action.Encoding when action == FileType.ReadFile:
{
Console.WriteLine("Opening file to encode.");
checkValid(location, false);
if (isValid())
{
openFile(location);
openBufferedStream();
}
break;
}
case SteganographyManager.Action.Decoding when action == FileType.ReadFile:
{
Console.WriteLine("Opening file to decode.");
checkValid(location, false);
if (isValid())
{
openFile(location);
openBinaryReader();
}
break;
}
case SteganographyManager.Action.Encoding when action == FileType.WriteFile:
{
Console.WriteLine("Creating file to write to.");
checkValid(location, true);
if (isValid())
{
createFile(location);
openBinaryWriter();
}
break;
}
case SteganographyManager.Action.Decoding when action == FileType.WriteFile:
{
Console.WriteLine("Creating file to write to.");
checkValid(location, true);
if (isValid())
{
createFile(location);
openBufferedStream();
}
break;
}
default:
throw new ArgumentOutOfRangeException();
}
}
