/// <summary>
/// Downloads the latest updates manifest from the Paint.NET web server.
/// </summary>
/// <returns>The latest updates manifest, or null if there was an error in which case the exception argument will be non-null.</returns>
// TODO: throw the exception, don't return it via an out parameter
private static PdnVersionManifest GetUpdatesManifest(out Exception exception)
{
try
{
string versionsUrl = VersionManifestUrl;
Uri versionsUri = new Uri(versionsUrl);
byte[] manifestBuffer = Utility.DownloadSmallFile(versionsUri);
string manifestText = System.Text.Encoding.UTF8.GetString(manifestBuffer);
string[] manifestLines = BreakIntoLines(manifestText);
NameValueCollection nameValues = LinesToNameValues(manifestLines);
string downloadPageUrl = nameValues[downloadPageUrlName];
string stableVersionsStrings = nameValues[stableVersionsName];
Version[] stableVersions = VersionStringToArray(stableVersionsStrings);
string[] stableNames = BuildVersionValueMapping(nameValues, stableVersions, nameNameFormat);
string[] stableNetFxVersions = BuildVersionValueMapping(nameValues, stableVersions, netFxVersionNameFormat);
string[] stableInfoUrls = BuildVersionValueMapping(nameValues, stableVersions, infoUrlNameFormat);
string[] stableZipUrls = BuildVersionValueMapping(nameValues, stableVersions, zipUrlListNameFormat);
string[] stableFullZipUrls = BuildVersionValueMapping(nameValues, stableVersions, fullZipUrlListNameFormat);
string betaVersionsStrings = nameValues[betaVersionsName];
Version[] betaVersions = VersionStringToArray(betaVersionsStrings);
string[] betaNames = BuildVersionValueMapping(nameValues, betaVersions, nameNameFormat);
string[] betaNetFxVersions = BuildVersionValueMapping(nameValues, betaVersions, netFxVersionNameFormat);
string[] betaInfoUrls = BuildVersionValueMapping(nameValues, betaVersions, infoUrlNameFormat);
string[] betaZipUrls = BuildVersionValueMapping(nameValues, betaVersions, zipUrlListNameFormat);
string[] betaFullZipUrls = BuildVersionValueMapping(nameValues, betaVersions, fullZipUrlListNameFormat);
PdnVersionInfo[] versionInfos = new PdnVersionInfo[betaVersions.Length + stableVersions.Length];
int cursor = 0;
for (int i = 0; i < stableVersions.Length; ++i)
{
List<string> zipUrlList = new List<string>();
SplitUrlList(stableZipUrls[i], zipUrlList);
List<string> fullZipUrlList = new List<string>();
SplitUrlList(stableFullZipUrls[i], fullZipUrlList);
PdnVersionInfo info = new PdnVersionInfo(stableVersions[i], stableNames[i], new Version(stableNetFxVersions[i]),
stableInfoUrls[i], zipUrlList.ToArray(), fullZipUrlList.ToArray(), true);
versionInfos[cursor] = info;
++cursor;
}
for (int i = 0; i < betaVersions.Length; ++i)
{
List<string> zipUrlList = new List<string>();
SplitUrlList(betaZipUrls[i], zipUrlList);
List<string> fullZipUrlList = new List<string>();
SplitUrlList(betaFullZipUrls[i], fullZipUrlList);
PdnVersionInfo info = new PdnVersionInfo(betaVersions[i], betaNames[i], new Version(betaNetFxVersions[i]),
betaInfoUrls[i], zipUrlList.ToArray(), fullZipUrlList.ToArray(), false);
versionInfos[cursor] = info;
++cursor;
}
PdnVersionManifest manifest = new PdnVersionManifest(downloadPageUrl, versionInfos);
exception = null;
return manifest;
}
catch (Exception ex)
{
exception = ex;
return null;
}
}
private static void CheckForUpdates(
out PdnVersionManifest manifestResult,
out int latestVersionIndexResult,
out Exception exception)
{
exception = null;
PdnVersionManifest manifest = null;
manifestResult = null;
latestVersionIndexResult = -1;
int retries = 2;
while (retries > 0)
{
try
{
manifest = GetUpdatesManifest(out exception);
retries = 0;
}
catch (Exception ex)
{
exception = ex;
--retries;
if (retries == 0)
{
manifest = null;
}
}
}
if (manifest != null)
{
int stableIndex = manifest.GetLatestStableVersionIndex();
int betaIndex = manifest.GetLatestBetaVersionIndex();
// Check for betas as well?
bool checkForBetas = ("1" == Settings.SystemWide.GetString(PdnSettings.AlsoCheckForBetas, "0"));
// Figure out which version we want to compare against the current version
int latestIndex = stableIndex;
if (checkForBetas)
{
// If they like betas, and if the beta is newer than the latest stable release,
// then offer it to them.
if (betaIndex != -1 &&
(stableIndex == -1 || manifest.VersionInfos[betaIndex].Version >= manifest.VersionInfos[stableIndex].Version))
{
latestIndex = betaIndex;
}
}
// Now compare that version against the current version
if (latestIndex != -1)
{
if (PdnInfo.IsTestMode ||
manifest.VersionInfos[latestIndex].Version > PdnInfo.GetVersion())
{
manifestResult = manifest;
latestVersionIndexResult = latestIndex;
}
}
}
}