/// <summary>
/// Creates an ePub file at the location specified by parameters
/// </summary>
/// <param name="parameters">BookPath and epubOutputPath should be set.</param>
/// <param name="control">The epub code needs a control that goes back to the main thread, in order to run some tasks that need to be on the main thread</param>
public static void CreateEpubArtifact(CreateArtifactsParameters parameters, Control control)
{
if (String.IsNullOrEmpty(parameters.EpubOutputPath))
{
return;
}
string directoryName = Path.GetDirectoryName(parameters.EpubOutputPath);
Directory.CreateDirectory(directoryName); // Ensures that the directory exists
BookServer bookServer = _projectContext.BookServer;
BookThumbNailer thumbNailer = _projectContext.ThumbNailer;
var maker = new EpubMaker(thumbNailer, bookServer);
maker.ControlForInvoke = control;
maker.Book = _book;
maker.Unpaginated = true; // so far they all are
maker.OneAudioPerPage = true; // default used in EpubApi
// Enhance: maybe we want book to have image descriptions on page? use reader font sizes?
// Make the epub
maker.SaveEpub(parameters.EpubOutputPath, new NullWebSocketProgress());
}
private static CreateArtifactsExitCode CreateArtifacts(CreateArtifactsParameters parameters)
{
var exitCode = CreateArtifactsExitCode.Success;
LoadBook(parameters.BookPath);
string zippedBloomPubOutputPath = parameters.BloomPubOutputPath;
string unzippedBloomDigitalOutputPath = parameters.BloomDigitalOutputPath;
string zippedBloomSourceOutputPath = parameters.BloomSourceOutputPath;
bool isBloomDOrBloomDigitalRequested = !String.IsNullOrEmpty(zippedBloomPubOutputPath) || !String.IsNullOrEmpty(unzippedBloomDigitalOutputPath);
if (isBloomDOrBloomDigitalRequested)
{
exitCode |= CreateBloomDigitalArtifacts(parameters.BookPath, parameters.Creator, zippedBloomPubOutputPath, unzippedBloomDigitalOutputPath);
}
if (!String.IsNullOrEmpty(zippedBloomSourceOutputPath))
{
exitCode |= CreateBloomSourceArtifact(parameters.BookPath, parameters.Creator, zippedBloomSourceOutputPath);
}
Control control = new Control();
control.CreateControl();
using (var countdownEvent = new CountdownEvent(1))
{
// Create the ePub in the background. (Some of the ePub work needs to happen off the main thread)
ThreadPool.QueueUserWorkItem(
x =>
{
try
{
CreateEpubArtifact(parameters, control);
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
exitCode = CreateArtifactsExitCode.EpubException;
}
countdownEvent.Signal(); // Decrement by one
}
);
// Wait around until the worker thread is done.
while (!countdownEvent.IsSet) // Set = true if the count is down to 0.
{
Thread.Sleep(100);
Application.DoEvents();
}
}
CreateThumbnailArtifact(parameters);
return(exitCode);
}
/// <summary>
/// Calculates the perceptual hash of the first content image of the book and writes it to a file
/// The perceptual hash may very well take on the value null. If so, the file will contain the literal string "null" (without the quotes) in it.
/// </summary>
/// <param name="parameters">parameters.PHashOutputInfoPath should contain the file path to which the create/write the PHash</param>
public static void CreatePHashArtifact(CreateArtifactsParameters parameters)
{
if (String.IsNullOrWhiteSpace(parameters.PHashOutputInfoPath))
{
return;
}
// This could take a second or more.
string pHash = _book.ComputePHashOfFirstContentImage();
using (var writer = new StreamWriter(parameters.PHashOutputInfoPath, append: false))
{
// Do note that the pHash may be null and it is expected that some books will legitimately have a null pHash
// so we write this value explicitly so that consumers can explicitly detect this.
writer.WriteLine(pHash ?? "null");
}
}
public static int Handle(CreateArtifactsParameters options)
{
try
{
Console.Out.WriteLine();
Program.SetUpErrorHandling();
using (var applicationContainer = new ApplicationContainer())
{
Program.SetUpLocalization(applicationContainer);
Browser.SetUpXulRunner();
Browser.XulRunnerShutdown += Program.OnXulRunnerShutdown;
LocalizationManager.SetUILanguage(Settings.Default.UserInterfaceLanguage, false); // Unclear if this line is needed or not.
if (DesktopAnalytics.Analytics.AllowTracking)
{
throw new ApplicationException("Allow tracking is enabled but we don't want the Harvester to actually send analytics.");
}
Program.RunningHarvesterMode = true;
string collectionFilePath = options.CollectionPath;
using (_projectContext = applicationContainer.CreateProjectContext(collectionFilePath))
{
Bloom.Program.SetProjectContext(_projectContext);
// Make the .bloomd and /bloomdigital outputs
var exitCode = CreateArtifacts(options);
return((int)exitCode);
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
Console.WriteLine(ex.StackTrace);
return((int)CreateArtifactsExitCode.UnhandledException);
}
}
public static void CreateThumbnailArtifact(CreateArtifactsParameters parameters)
{
if (String.IsNullOrWhiteSpace(parameters.ThumbnailOutputInfoPath))
{
return;
}
var outputPaths = new List <string>();
int[] requestedHeights = new int[2] {
256, 70
};
foreach (int height in requestedHeights)
{
// A potential "enhancement" is that we could try to re-use the thumbnail generated when making an ePUB.
// That could be helpful if creating new thumbnails was a big enough cost
// The ePub Path looks like this: $"%TEMP%\\ePUB_export\\{i}\\{book.Title}\\thumbnail-{height}.png"
// (where i is an integer between 0-19. Depends on whether it's been locked or not.)
//
// For now, we'll just create the thumbnail every time
// It makes the code simpler than having fallback logic not to mention the complications of determining which folder the ePub is in, whether it's really up-to-date, etc.
string thumbnailPath = BookThumbNailer.GenerateCoverImageOfRequestedMaxSize(_book, height);
AppendPathIfExists(thumbnailPath, outputPaths);
}
string shareThumbnail = BookThumbNailer.GenerateSocialMediaSharingThumbnail(_book);
AppendPathIfExists(shareThumbnail, outputPaths);
using (var writer = new StreamWriter(parameters.ThumbnailOutputInfoPath, append: false))
{
foreach (var path in outputPaths)
{
writer.WriteLine(path);
}
}
}
