private bool TryGetDefinitionVersion(ZipFile zip, string version, out RelationDefinition definition, out DateTime lastMod)
{
var storedVersionEntry = zip[VersionFile];
string storedVersion;
using (var s = storedVersionEntry.OpenReader()) {
using (var r = new StreamReader(s))
storedVersion = r.ReadToEnd();
}
if (storedVersion != version) {
var existingDefPath = string.Format("{0}/{1}", version, DefinitionFile);
if (zip.ContainsEntry(existingDefPath)) {
ZipCopy(zip, existingDefPath, DefinitionFile);
UpdateVersion(zip);
zip.Save();
definition = ReadDefinition(zip, DefinitionFile, out lastMod);
return true;
}
definition = null;
lastMod = DateTime.MinValue;
return false;
}
definition = ReadDefinition(zip, DefinitionFile, out lastMod);
return true;
}
/// <summary>
/// Attempt to get the <see cref="RelationDefinition" /> for a specific version from storage.
/// </summary>
/// <param name="zip"><see cref="ZipFile" /> to read from.</param>
/// <param name="version">Definition version to look for.</param>
/// <param name="definition">
/// When this method returns, contains the <see cref="RelationDefinition" /> for the specified
/// version, if found; otherwise, <c>null</c>.
/// </param>
/// <returns><c>true</c> if the definition for the specified version was present; <c>false</c> otherwise.</returns>
private bool TryGetDefinitionVersion(ZipFile zip, string version, out RelationDefinition definition)
{
DateTime mod;
return TryGetDefinitionVersion(zip, version, out definition, out mod);
}
private bool TryGetDefinitionFromFileSystem(FileInfo file, out RelationDefinition definition, out DateTime lastWrite)
{
if (file.Exists) {
lastWrite = file.LastWriteTimeUtc;
definition = RelationDefinition.Deserialize(file.FullName);
return true;
}
lastWrite = DateTime.MinValue;
definition = null;
return false;
}
private bool TryGetDefinitionFromFileSystem(out RelationDefinition definition, out DateTime lastWrite)
{
var file = new FileInfo(Path.Combine(StateFile.Directory.FullName, DefinitionFile));
return TryGetDefinitionFromFileSystem(file, out definition, out lastWrite);
}
/// <summary>
/// Serialize a <see cref="RelationDefinition" /> into a <see cref="ZipFile" />.
/// </summary>
/// <param name="zip"><see cref="ZipFile" /> to write to.</param>
/// <param name="definition"><see cref="RelationDefinition" /> to store.</param>
/// <param name="path">File name inside the storage to write to.</param>
private static void StoreDefinition(ZipFile zip, RelationDefinition definition, string path)
{
using (var ms = new MemoryStream()) {
using (var writer = new StreamWriter(ms, ZipEncoding)) {
definition.Serialize(writer);
writer.Flush();
zip.UpdateEntry(path, ms.ToArray());
}
}
}
public static RelationDefinition FromJson(string json)
{
JObject obj = Newtonsoft.Json.JsonConvert.DeserializeObject <JObject>(json);
return(RelationDefinition.FromJson(obj));
}