/// <summary>
/// Updates a package in the list of packages.
/// </summary>
/// <param name="manifest">The manifest of the package.</param>
/// <param name="packageList">The XML document containing the list.</param>
/// <param name="addPackage">Whether to add or remove the package</param>
private void UpdatePackagesList(PackageManifest manifest, XmlDocument packageList, bool addPackage)
{
XmlElement packageElement = packageList.SelectSingleNode(
string.Format(System.Globalization.CultureInfo.CurrentCulture, "/packages/package[@name='{0}']",
manifest.Name)) as XmlElement;
if (packageElement == null)
{
if (addPackage)
{
// Generate a new package element
packageElement = packageList.CreateElement("package");
packageElement.SetAttribute("name", manifest.Name);
packageElement.SetAttribute("description", manifest.Description);
packageElement.SetAttribute("type", manifest.Type.ToString());
packageElement.SetAttribute("group", manifest.Group);
packageElement.SetAttribute("file", manifest.FileName);
packageList.DocumentElement.AppendChild(packageElement);
}
}
else
{
if (!addPackage)
{
packageElement.ParentNode.RemoveChild(packageElement);
}
}
if (addPackage)
{
// Update the installed status - this is the only thing that should change
packageElement.SetAttribute("installed", manifest.IsInstalled ? "yes" : "no");
}
}
/// <summary>
/// Imports a package.
/// </summary>
/// <param name="context"></param>
/// <param name="velocityContext"></param>
private void ImportPackage(HttpContext context, Hashtable velocityContext)
{
HttpPostedFile file = context.Request.Files["package"];
if (file.ContentLength == 0)
{
velocityContext["Error"] = this.translations.Translate("No file selected to import!");
}
else
{
PackageManifest manifest = manager.StorePackage(file.FileName, file.InputStream);
if (manifest == null)
{
// If there is no manifest, then the package is invalid
velocityContext["Error"] = this.translations.Translate("Invalid package - manifest file is missing");
}
else
{
// Otherwise pass on the details to the view generator
velocityContext["Result"] = this.translations.Translate("Package '{0}' has been loaded",
manifest.Name);
velocityContext["InstallPackage"] = manifest.FileName;
}
}
}
/// <summary>
/// Stores a package locally on the server
/// </summary>
/// <param name="fileName">The file name of the package.</param>
/// <param name="stream">The stream containing the package.</param>
public PackageManifest StorePackage(string fileName, Stream stream)
{
// Initialise the path and make sure the folder is there
FileInfo packageDetails = new FileInfo(fileName);
string packagePath = Path.Combine(ProgramDataFolder.MapPath("Packages"),
packageDetails.Name);
packageDetails = new FileInfo(packagePath);
if (!packageDetails.Directory.Exists)
{
packageDetails.Directory.Create();
}
// We will always overwrite an existing packages, maybe we should do a back-up first?
if (packageDetails.Exists)
{
packageDetails.Delete();
}
SaveToFile(stream, packageDetails.FullName);
bool delete = false;
// Load the package and extract the manifest details
PackageManifest manifest = null;
using (Stream inputStream = File.OpenRead(packagePath))
{
using (Package newPackage = new Package(inputStream))
{
if (!newPackage.IsValid)
{
delete = true;
}
else
{
manifest = newPackage.Manifest;
manifest.FileName = packageDetails.Name;
}
}
}
if (manifest != null)
{
// Update the package list
XmlDocument packageList = LoadPackageList();
UpdatePackagesList(manifest, packageList, true);
SavePackageList(packageList);
}
// Don't forget to clean-up, otherwise the packages directory will have invalid packages
if (delete && packageDetails.Exists)
{
packageDetails.Delete();
}
return(manifest);
}
/// <summary>
/// Initialises a new package from a stream.
/// </summary>
/// <param name="packageStream">The stream that contains the package.</param>
public Package(Stream packageStream)
{
// Extract all the files into a temporary location
ExtractAllFiles(packageStream);
// Attempt to load the manifest
string manifestFile = Path.Combine(tempFolder, "Manifest.xml");
if (File.Exists(manifestFile))
{
XmlSerializer serialiser = new XmlSerializer(typeof(PackageManifest));
using (Stream inputStream = File.OpenRead(manifestFile))
{
manifest = serialiser.Deserialize(inputStream) as PackageManifest;
inputStream.Close();
}
}
}
/// <summary>
/// Initialises a new package from a stream.
/// </summary>
/// <param name="packageStream">The stream that contains the package.</param>
public Package(Stream packageStream)
{
// Extract all the files into a temporary location
ExtractAllFiles(packageStream);
// Attempt to load the manifest
string manifestFile = Path.Combine(tempFolder, "Manifest.xml");
if (File.Exists(manifestFile))
{
XmlSerializer serialiser = new XmlSerializer(typeof(PackageManifest));
using (Stream inputStream = File.OpenRead(manifestFile))
{
manifest = serialiser.Deserialize(inputStream) as PackageManifest;
inputStream.Close();
}
}
}
/// <summary>
/// Removes a package stored locally on the server
/// </summary>
/// <param name="fileName">The file name of the package.</param>
/// <returns>The name of the package.</returns>
public string RemovePackage(string fileName)
{
// Initialise the path and make sure the folder is there
FileInfo packageDetails = new FileInfo(fileName);
string packagePath = Path.Combine(ProgramDataFolder.MapPath("Packages"),
packageDetails.Name);
packageDetails = new FileInfo(packagePath);
string packageName = null;
if (packageDetails.Directory.Exists)
{
// Load the package and extract the manifest details
PackageManifest manifest = null;
using (Stream inputStream = File.OpenRead(packagePath))
{
using (Package newPackage = new Package(inputStream))
{
if (newPackage.IsValid)
{
manifest = newPackage.Manifest;
manifest.FileName = packageDetails.Name;
}
}
}
if (manifest != null)
{
// Update the package list
XmlDocument packageList = LoadPackageList();
UpdatePackagesList(manifest, packageList, false);
SavePackageList(packageList);
packageName = manifest.Name;
}
// Finally, remove the package
packageDetails.Delete();
}
return(packageName);
}
/// <summary>
/// Lists all the available packages.
/// </summary>
/// <returns></returns>
public virtual List <PackageManifest> ListPackages()
{
List <PackageManifest> packages = new List <PackageManifest>();
// Load the document
XmlDocument document = LoadPackageList();
// Parse each item and add it in
foreach (XmlElement packageElement in document.SelectNodes("/packages/package"))
{
PackageManifest manifest = new PackageManifest();
manifest.Name = packageElement.GetAttribute("name");
manifest.Description = packageElement.GetAttribute("description");
manifest.Type = (PackageType)Enum.Parse(typeof(PackageType), packageElement.GetAttribute("type"));
manifest.FileName = packageElement.GetAttribute("file");
manifest.IsInstalled = (packageElement.GetAttribute("installed") == "yes");
packages.Add(manifest);
}
return(packages);
}
/// <summary>
/// Lists all the available packages.
/// </summary>
/// <returns></returns>
public virtual List<PackageManifest> ListPackages()
{
List<PackageManifest> packages = new List<PackageManifest>();
// Load the document
XmlDocument document = LoadPackageList();
// Parse each item and add it in
foreach (XmlElement packageElement in document.SelectNodes("/packages/package"))
{
PackageManifest manifest = new PackageManifest();
manifest.Name = packageElement.GetAttribute("name");
manifest.Description = packageElement.GetAttribute("description");
manifest.Type = (PackageType)Enum.Parse(typeof(PackageType), packageElement.GetAttribute("type"));
manifest.FileName = packageElement.GetAttribute("file");
manifest.IsInstalled = (packageElement.GetAttribute("installed") == "yes");
packages.Add(manifest);
}
return packages;
}
/// <summary>
/// Updates a package in the list of packages.
/// </summary>
/// <param name="manifest">The manifest of the package.</param>
/// <param name="packageList">The XML document containing the list.</param>
/// <param name="addPackage">Whether to add or remove the package</param>
private void UpdatePackagesList(PackageManifest manifest, XmlDocument packageList, bool addPackage)
{
XmlElement packageElement = packageList.SelectSingleNode(
string.Format(System.Globalization.CultureInfo.CurrentCulture,"/packages/package[@name='{0}']",
manifest.Name)) as XmlElement;
if (packageElement == null)
{
if (addPackage)
{
// Generate a new package element
packageElement = packageList.CreateElement("package");
packageElement.SetAttribute("name", manifest.Name);
packageElement.SetAttribute("description", manifest.Description);
packageElement.SetAttribute("type", manifest.Type.ToString());
packageElement.SetAttribute("file", manifest.FileName);
packageList.DocumentElement.AppendChild(packageElement);
}
}
else
{
if (!addPackage)
{
packageElement.ParentNode.RemoveChild(packageElement);
}
}
if (addPackage)
{
// Update the installed status - this is the only thing that should change
packageElement.SetAttribute("installed", manifest.IsInstalled ? "yes" : "no");
}
}