private bool ValidateFile(Installation.File file, string file_path)
{
if (File.Exists(file_path))
{
// process the file present event
Installation.Message on_present_message = file.OnPresentMessage;
if (on_present_message != null)
{
switch (on_present_message.Type)
{
case ValidationEventEnum.Warn:
// add warning
WarningMessages.Add(on_present_message.MessageValue);
return true;
case ValidationEventEnum.Error:
//add error
ErrorMessages.Add(on_present_message.MessageValue);
return false;
default:
throw new Exception("Unknown event type");
}
}
// open the file and generate an MD5 hash for it
string local_md5 = "";
using(FileStream opened_file = File.OpenRead(file_path))
{
// error if file could not be opened
if ((opened_file == null) || !opened_file.CanRead)
{
ErrorMessages.Add(String.Format("Failed to open {0} for reading, close all programs before attempting to install", file.Name));
return false;
}
local_md5 = MD5Stream(opened_file);
if (local_md5 == null)
{
ErrorMessages.Add(String.Format("Failed to create an MD5 checksum for {0}. Inform the developers of this.", file.Name));
return false;
}
}
// compare the MD5 hash with all known version
foreach (var version in file.Versions)
{
if (String.Equals(version.MD5, local_md5, StringComparison.CurrentCultureIgnoreCase))
{
// process file matches version event
Installation.Message on_match_message = version.OnMatchMessage;
if (on_match_message != null)
{
switch (on_match_message.Type)
{
case ValidationEventEnum.Warn:
// add warning
WarningMessages.Add(on_match_message.MessageValue);
return true;
case ValidationEventEnum.Error:
//add error
ErrorMessages.Add(on_match_message.MessageValue);
return false;
}
}
}
else
{
// process file differs from version event
Installation.Message on_diff_message = version.OnDiffMessage;
if (on_diff_message != null)
{
switch (on_diff_message.Type)
{
case ValidationEventEnum.Warn:
// add warning
WarningMessages.Add(on_diff_message.MessageValue);
return true;
case ValidationEventEnum.Error:
//add error
ErrorMessages.Add(on_diff_message.MessageValue);
return false;
}
}
}
}
}
else
{
// process file missing event
Installation.Message on_missing_message = file.OnMissingMessage;
if (on_missing_message != null)
{
switch (on_missing_message.Type)
{
case ValidationEventEnum.Warn:
// add warning
WarningMessages.Add(on_missing_message.MessageValue);
break;
case ValidationEventEnum.Error:
//add error
ErrorMessages.Add(on_missing_message.MessageValue);
return false;
}
}
}
return true;
}
private bool ValidateDirectory(Installation.Directory directory, string directory_path)
{
if (Directory.Exists(directory_path))
{
// process directory present event
Installation.Message on_present_message = directory.OnPresentMessage;
if (on_present_message != null)
{
switch (on_present_message.Type)
{
case ValidationEventEnum.Warn:
// add warning
WarningMessages.Add(on_present_message.MessageValue);
return true;
case ValidationEventEnum.Error:
//add error
ErrorMessages.Add(on_present_message.MessageValue);
return false;
}
}
// validate known subdirectories
foreach (var sub_directory in directory.SubDirectories)
{
string sub_directory_path = Path.Combine(directory_path, sub_directory.Name);
if (!ValidateDirectory(sub_directory, sub_directory_path))
return false;
}
// validate known files
foreach (var file in directory.Files)
{
string file_path = Path.Combine(directory_path, file.Name);
if (!ValidateFile(file, file_path))
return false;
}
}
else
{
// process diretory missing event
Installation.Message on_missing_message = directory.OnMissingMessage;
if (on_missing_message != null)
{
switch (on_missing_message.Type)
{
case ValidationEventEnum.Warn:
// add warning
WarningMessages.Add(on_missing_message.MessageValue);
break;
case ValidationEventEnum.Error:
//add error
ErrorMessages.Add(on_missing_message.MessageValue);
return false;
}
}
}
return true;
}
public Validator(string definition_id)
{
// build the location of the game definition resource
// open the resource for reading
Stream xml_stream = null;
xml_stream = GetType().Assembly.GetManifestResourceStream(String.Format("InstallValidator.InstallationDefinitions.{0}.xml", definition_id));
if (xml_stream == null)
throw new Exception(String.Format("Matching installation definition for {0} was not found. Inform the developers of the problem", definition_id));
// deserialize the definition xml
XmlSerializer serializer = new XmlSerializer(typeof(Installation));
m_installation = serializer.Deserialize(xml_stream) as Installation;
if (m_installation == null)
throw new Exception(String.Format("Failed to deserialize a installation definition xml {0}. Inform the developers of the problem.", definition_id));
// create the message lists
WarningMessages = new List<string>();
ErrorMessages = new List<string>();
}