public ResourceBE GetResource(uint? parentId, ResourceBE.ParentType? parentType, ResourceBE.Type resourceType, string name, DeletionFilter deletionStateFilter) {
if(name == null) {
throw new ArgumentNullException("name");
}
uint[] parentids = parentId == null ? new uint[] { } : new[] { parentId.Value };
return GetResources(parentids, parentType, new[] { resourceType }, new[] { name }, deletionStateFilter, null, null, null).FirstOrDefault();
}
public ResourceBE(ResourceBE sourceRev) : this(sourceRev.ResourceType)
{
ResourceId = sourceRev.ResourceId;
Revision = sourceRev.Revision;
ChangeDescription = sourceRev.ChangeDescription;
Name = sourceRev.Name;
Timestamp = sourceRev.Timestamp;
ChangeMask = sourceRev.ChangeMask;
UserId = sourceRev.UserId;
ChangeSetId = sourceRev.ChangeSetId;
Deleted = sourceRev.Deleted;
ParentId = sourceRev.ParentId;
ParentPageId = sourceRev.ParentPageId;
ParentUserId = sourceRev.ParentUserId;
ChildResources = sourceRev.ChildResources;
// revision contents
Size = sourceRev.Size;
MimeType = sourceRev.MimeType;
Content = sourceRev.Content;
ContentId = sourceRev.ContentId;
Meta = sourceRev.Meta;
// resource info
ResourceIsDeleted = sourceRev.ResourceIsDeleted;
ResourceUpdateUserId = sourceRev.ResourceUpdateUserId;
ResourceUpdateTimestamp = sourceRev.ResourceUpdateTimestamp;
ResourceHeadRevision = sourceRev.ResourceHeadRevision;
ResourceCreateUserId = sourceRev.ResourceCreateUserId;
ResourceCreateTimestamp = sourceRev.ResourceCreateTimestamp;
}
public ResourceBE(ResourceBE sourceRev) : this(sourceRev.ResourceType) {
ResourceId = sourceRev.ResourceId;
Revision = sourceRev.Revision;
ChangeDescription = sourceRev.ChangeDescription;
Name = sourceRev.Name;
Timestamp = sourceRev.Timestamp;
ChangeMask = sourceRev.ChangeMask;
UserId = sourceRev.UserId;
ChangeSetId = sourceRev.ChangeSetId;
Deleted = sourceRev.Deleted;
ParentId = sourceRev.ParentId;
ParentPageId = sourceRev.ParentPageId;
ParentUserId = sourceRev.ParentUserId;
ChildResources = sourceRev.ChildResources;
// revision contents
Size = sourceRev.Size;
MimeType = sourceRev.MimeType;
Content = sourceRev.Content;
ContentId = sourceRev.ContentId;
Meta = sourceRev.Meta;
// resource info
ResourceIsDeleted = sourceRev.ResourceIsDeleted;
ResourceUpdateUserId = sourceRev.ResourceUpdateUserId;
ResourceUpdateTimestamp = sourceRev.ResourceUpdateTimestamp;
ResourceHeadRevision = sourceRev.ResourceHeadRevision;
ResourceCreateUserId = sourceRev.ResourceCreateUserId;
ResourceCreateTimestamp = sourceRev.ResourceCreateTimestamp;
}
//--- Methods ---
public bool IsAllowedForImageMagickPreview(ResourceBE file) {
// TODO (steveb): recognize mime-types as well
if(Array.IndexOf(_dekiContext.Instance.ImageMagickExtensions, file.FilenameExtension.ToLowerInvariant()) == -1) {
return false;
}
return _dekiContext.Instance.MaxImageSize >= file.Size;
}
public void DeleteFile(ResourceBE attachment, SizeType size) {
if (!attachment.IsHeadRevision()) {
throw new StorageNonHeadRevisionDeleteFatalException();
}
for (int i = 1; i <= attachment.Content.Revision; i++) {
string filename = FilePath(attachment, size);
try {
File.Delete(filename);
} catch { }
}
}
private static void FSToS3(ResourceBE[] attachmentList) {
XDoc s3config = new XDoc("config")
.Start("publickey").Value(_public_key).End()
.Start("privatekey").Value(_private_key).End()
.Start("bucket").Value(_default_bucket).End()
.Start("prefix").Value(_prefix).End();
S3Storage s3 = new S3Storage(s3config, LogUtils.CreateLog<S3Storage>());
XDoc fsconfig = new XDoc("config")
.Start("path").Value(_attachmentPath).End();
FSStorage fs = new FSStorage(fsconfig);
transferFiles(attachmentList, fs, s3);
}
//--- Methods ---
public StreamInfo GetFile(ResourceBE attachment, SizeType size, bool allowFileLink) {
MimeType mime;
switch (size) {
case SizeType.THUMB:
case SizeType.WEBVIEW:
mime = AttachmentPreviewBL.ResolvePreviewMime(attachment.MimeType);
break;
default:
mime = attachment.MimeType;
break;
}
return GetFileInternal(FilePath(attachment, size), mime);
}
private ResourceBE BuildRevForExistingResource(ResourceBE currentResource, MimeType mimeType, uint size, string description) {
ResourceBE newRev = BuildResourceRev(currentResource);
newRev.MimeType = mimeType;
newRev.Size = size;
newRev.ChangeDescription = description;
newRev.Content = currentResource.Content;
newRev.ContentId = currentResource.ContentId;
return newRev;
}
public ResourceBE UpdatePropertyContent(ResourceBE prop, ResourceContentBE content, string changeDescription, string eTag, AbortEnum abort, XUri parentUri, ResourceBE.ParentType parentType) {
if(abort == AbortEnum.Modified) {
_resourceBL.ValidateEtag(eTag, prop, true);
}
prop = _resourceBL.BuildRevForContentUpdate(prop, content.MimeType, content.Size, changeDescription, null, content);
prop = _resourceBL.SaveResource(prop);
DekiContext.Current.Instance.EventSink.PropertyUpdate(DekiContext.Current.Now, prop, DekiContext.Current.User, parentType, parentUri);
return prop;
}
public XDoc GetPropertyXml(ResourceBE property, XUri parentResourceUri, string propSuffix, uint? contentCutoff) {
return GetPropertyXml(new ResourceBE[] { property }, parentResourceUri, false, propSuffix, null, contentCutoff, null);
}
public ResourceBE[] SaveBatchProperties(uint? parentId, XUri parentUri, ResourceBE.ParentType parentType, XDoc doc, out string[] failedNames, out Dictionary<string, Exception> saveStatusByName) {
//This is a specialized method that saves a batch of property updates in one request and connects them with a transaction.
//Successful updates are returned
//Status/description of each property update is returned as well as a hash of dreammessages by name
saveStatusByName = new Dictionary<string, Exception>();
List<string> failedNamesList = new List<string>();
Dictionary<string, ResourceBE> resourcesByName = new Dictionary<string, ResourceBE>();
List<ResourceBE> ret = new List<ResourceBE>();
//Get list of names and perform dupe check
foreach(XDoc propDoc in doc["/properties/property"]) {
string name = propDoc["@name"].AsText ?? string.Empty;
if(resourcesByName.ContainsKey(name)) {
throw new PropertyDuplicateInvalidOperationException(name);
}
resourcesByName[name] = null;
}
//Retrieve current properties with given name
resourcesByName = _resourceBL.GetResources(parentId, parentType, ResourceBL.PROPERTIES, new List<string>(resourcesByName.Keys).ToArray(), DeletionFilter.ACTIVEONLY).AsHash(e => e.Name);
//extract property info, build resource revisions, save resource, and maintain statuses for each save
foreach(XDoc propDoc in doc["/properties/property"]) {
ResourceBE res = null;
string content;
uint contentLength = 0;
string description = string.Empty;
string etag = null;
MimeType mimeType;
string name = string.Empty;
try {
name = propDoc["@name"].AsText ?? string.Empty;
resourcesByName.TryGetValue(name, out res);
if(propDoc["contents"].IsEmpty) {
if(res == null) {
throw new PropertyDeleteDoesNotExistInvalidArgumentException(name);
} else {
res = DeleteProperty(res, parentType, parentUri);
}
} else {
//parse content from xml
etag = propDoc["@etag"].AsText;
description = propDoc["description"].AsText;
content = propDoc["contents"].Contents;
contentLength = (uint)(content ?? string.Empty).Length;
string mimeTypeStr = propDoc["contents/@type"].AsText;
if(string.IsNullOrEmpty(mimeTypeStr) || !MimeType.TryParse(mimeTypeStr, out mimeType)) {
throw new PropertyMimtypeInvalidArgumentException(name, mimeTypeStr);
}
ResourceContentBE resourceContent = new ResourceContentBE(content, mimeType);
if(res == null) {
//new property
res = CreateProperty(parentId, parentUri, parentType, name, resourceContent, description, etag, AbortEnum.Exists);
} else {
//new revision
res = UpdatePropertyContent(res, resourceContent, description, etag, AbortEnum.Modified, parentUri, parentType);
}
}
ret.Add(res);
saveStatusByName[name] = null;
} catch(ResourcedMindTouchException x) {
//Unexpected errors fall through while business logic errors while saving a property continues processing
saveStatusByName[name] = x;
failedNamesList.Add(name);
} catch(DreamAbortException x) {
// TODO (arnec): remove this once all usage of DreamExceptions is purged from Deki logic
//Unexpected errors fall through while business logic errors while saving a property continues processing
saveStatusByName[name] = x;
failedNamesList.Add(name);
}
}
failedNames = failedNamesList.ToArray();
return ret.ToArray();
}
//--- Methods ---
#region ResourceDA query wrappers
public IList<ResourceBE> GetResources(IList<uint> parentids, ResourceBE.ParentType? parentType, IList<ResourceBE.Type> resourceTypes, IList<string> names, DeletionFilter deletionStateFilter, bool? populateRevisions, uint? limit, uint? offset) {
return DbUtils.CurrentSession.Resources_GetByQuery(parentids, parentType, resourceTypes, names, deletionStateFilter, populateRevisions, offset, limit);
}
private Dictionary<ulong, List<ResourceBE>> GroupByParentIdInternal(IEnumerable<ResourceBE> resources, ResourceBE.ParentType? parentType) {
Dictionary<ulong, List<ResourceBE>> temp = new Dictionary<ulong, List<ResourceBE>>();
foreach(ResourceBE res in resources) {
ulong? id = null;
switch(parentType) {
case ResourceBE.ParentType.PAGE:
id = res.ParentPageId;
break;
case ResourceBE.ParentType.USER:
id = res.ParentUserId;
break;
default:
id = res.ParentId;
break;
}
if((id ?? 0) != 0) {
if(!temp.ContainsKey(id.Value)) {
temp[id.Value] = new List<ResourceBE>();
}
temp[id.Value].Add(res);
}
}
return temp;
}
public Dictionary<ulong, IList<ResourceBE>> GroupByParentId(IEnumerable<ResourceBE> resources, ResourceBE.ParentType? parentType) {
Dictionary<ulong, List<ResourceBE>> temp = GroupByParentIdInternal(resources, parentType);
Dictionary<ulong, IList<ResourceBE>> ret = new Dictionary<ulong, IList<ResourceBE>>();
//Convert lists to arrays
foreach(KeyValuePair<ulong, List<ResourceBE>> kvp in temp) {
ret[kvp.Key] = kvp.Value;
}
return ret;
}
public void ReAssociateResourceState(ResourceBE oldRev, ResourceBE newRev) {
if(oldRev == null || newRev == null) {
return;
}
}
public virtual ResourceBE UpdateResourceRevision(ResourceBE res) {
ResourceBE ret = DbUtils.CurrentSession.Resources_UpdateRevision(res);
ReAssociateResourceState(res, ret);
return ret;
}
public virtual ResourceBE BuildRevForContentUpdate(ResourceBE currentResource, MimeType mimeType, uint size, string description, string name, ResourceContentBE newContent) {
ResourceBE newRev = BuildRevForExistingResource(currentResource, mimeType, size, description);
newRev.Content = newContent;
newRev.ContentId = 0;
newRev.ChangeMask |= ResourceBE.ChangeOperations.CONTENT;
if(name != null && !StringUtil.EqualsInvariant(name, newRev.Name)) {
newRev.ChangeMask |= ResourceBE.ChangeOperations.NAME;
newRev.Name = name;
}
return newRev;
}
protected virtual ResourceBE BuildResourceRev(ResourceBE currentRevision) {
currentRevision.AssertHeadRevision();
//Clone the resource revision
ResourceBE newRev = new ResourceBE(currentRevision) {
ChangeMask = ResourceBE.ChangeOperations.UNDEFINED,
Timestamp = DateTime.UtcNow,
UserId = DekiContext.Current.User.ID,
ChangeSetId = 0,
Deleted = false,
ChangeDescription = null,
IsHidden = false,
Meta = currentRevision.Meta
};
//Initialize for new revision (clear anything that shouldn't be carried over from current rev)
return newRev;
}
public IList<ResourceBE> GetResources(uint? parentId, ResourceBE.ParentType parentType, IList<ResourceBE.Type> resourceTypes, string[] names, DeletionFilter deletionStateFilter) {
uint[] parentids = parentId == null ? new uint[] { } : new[] { parentId.Value };
return GetResources(parentids, parentType, resourceTypes, names, deletionStateFilter, null, null, null);
}
public bool ValidateEtag(string etag, ResourceBE headResource, bool throwException) {
if(!headResource.IsHeadRevision()) {
throw new ResourceEtagNotHeadInvalidArgumentException(headResource.ResourceId, headResource.Revision);
}
bool isValid = false;
if(etag != null && StringUtil.EqualsInvariant(etag, headResource.ETag())) {
isValid = true;
}
if(!isValid && throwException) {
throw new ResourceEtagConflictException(etag ?? string.Empty, headResource.ResourceId);
}
return isValid;
}
public IList<ResourceBE> GetResourceRevisions(uint resourceid, ResourceBE.ChangeOperations changeTypesFilter, SortDirection sortRevisions, uint? limit) {
IList<ResourceBE> ret = DbUtils.CurrentSession.Resources_GetRevisions(resourceid, changeTypesFilter, sortRevisions, limit).ToArray();
return ret;
}
public IList<ResourceBE> GetResourcesByChangeSet(uint changeSetId, ResourceBE.Type resourceType) {
return DbUtils.CurrentSession.Resources_GetByChangeSet(changeSetId, resourceType).ToArray();
}
public virtual ResourceBE BuildRevForMoveAndRename(ResourceBE currentResource, PageBE targetPage, string name, uint changeSetId) {
ResourceBE newRev = BuildResourceRev(currentResource);
//NOTE MaxM: This logic exists here since BuildResourceRev clears out fields preventing chaining of entity building for separate actions on one revision
if(targetPage != null && (uint)targetPage.ID != newRev.ParentPageId.Value) {
newRev.ParentPageId = (uint)targetPage.ID;
newRev.ChangeMask |= ResourceBE.ChangeOperations.PARENT;
}
if(name != null && !StringUtil.EqualsInvariant(name, currentResource.Name)) {
newRev.Name = name;
newRev.ChangeMask |= ResourceBE.ChangeOperations.NAME;
}
newRev.ChangeSetId = changeSetId;
return newRev;
}
public IList<ResourceBE> PopulateChildren(ResourceBE[] resources, ResourceBE.Type[] resourceTypes, bool associateRevisions) {
if(ArrayUtil.IsNullOrEmpty(resources)) {
return resources;
}
Dictionary<uint, object> resourceIdsHash = new Dictionary<uint, object>();
foreach(ResourceBE r in resources) {
resourceIdsHash[r.ResourceId] = null;
}
uint[] resourceIds = new List<uint>(resourceIdsHash.Keys).ToArray();
IList<ResourceBE> children = GetResources(resourceIds, null, resourceTypes, null, DeletionFilter.ACTIVEONLY, associateRevisions, null, null);
Dictionary<ulong, IList<ResourceBE>> childrenByParentId = GroupByParentId(children, null);
if(!associateRevisions) {
//Head revisions of all children of the resource are associated
foreach(ResourceBE parent in resources) {
if(childrenByParentId.TryGetValue(parent.ResourceId, out children)) {
parent.ChildResources = children.ToArray();
}
}
} else {
//Corresponding revisions of all children of the resource are associated
foreach(ResourceBE parent in resources) {
if(childrenByParentId.TryGetValue(parent.ResourceId, out children)) {
List<ResourceBE> childrenAtRevs = new List<ResourceBE>();
Dictionary<uint, ResourceBE[]> revsForChild = GroupByResourceId(children);
foreach(KeyValuePair<uint, ResourceBE[]> childRevSet in revsForChild) {
ResourceBE[] childRevisions = childRevSet.Value;
//Ensure that the revisions are sorted by rev# desc. Index
Array.Sort<ResourceBE>(childRevisions, delegate(ResourceBE left, ResourceBE right) {
return right.Revision.CompareTo(left.Revision);
});
if(parent.IsHeadRevision()) {
//Head revision of parent should use head revision of children
if(childRevisions.Length > 0) {
childrenAtRevs.Add(childRevisions[0]);
}
} else {
//Determine the highest timestamp a child property revision can have
DateTime timestampOfNextRev = DateTime.MaxValue;
//Revision HEAD - 1 can use the HEAD resources timestamp
if(parent.Revision + 1 == parent.ResourceHeadRevision) {
timestampOfNextRev = parent.ResourceUpdateTimestamp;
} else {
//Determine timestamp of next revision
ResourceBE nextRev = null;
//Look to see if current list of resources contains the next revision
foreach(ResourceBE r in resources) {
if(parent.ResourceId == r.ResourceId && parent.Revision + 1 == r.Revision) {
nextRev = r;
break;
}
}
//Perform DB call to retrieve next revision
if(nextRev == null) {
nextRev = GetResourceRevision(parent.ResourceId, parent.Revision + 1);
}
if(nextRev != null) {
timestampOfNextRev = nextRev.Timestamp;
}
}
//Get most recent revision of child before the timestamp of the next revision of parent.
for(int i = 0; i < childRevisions.Length; i++) {
if(timestampOfNextRev > childRevisions[i].Timestamp) {
childrenAtRevs.Add(childRevisions[i]);
break;
}
}
}
}
parent.ChildResources = childrenAtRevs.ToArray();
}
}
}
return resources;
}
public virtual ResourceBE BuildRevForRemove(ResourceBE currentResource, DateTime timestamp, uint changeSetId) {
ResourceBE newRev = BuildResourceRev(currentResource);
newRev.ResourceIsDeleted = true;
newRev.Deleted = true;
newRev.ChangeSetId = changeSetId;
newRev.Timestamp = timestamp;
newRev.ChangeMask = newRev.ChangeMask | ResourceBE.ChangeOperations.DELETEFLAG;
return newRev;
}
public ResourceBE DeleteProperty(ResourceBE prop, ResourceBE.ParentType parentType, XUri parentUri) {
DekiContext.Current.Instance.EventSink.PropertyDelete(DekiContext.Current.Now, prop, DekiContext.Current.User, parentType, parentUri);
return _resourceBL.Delete(prop);
}
public virtual ResourceBE BuildRevForRestore(ResourceBE currentResource, PageBE targetPage, string resourceName, uint changeSetId) {
ResourceBE newRev = BuildResourceRev(currentResource);
newRev.ResourceIsDeleted = false;
newRev.ChangeSetId = changeSetId;
newRev.ParentPageId = (uint)targetPage.ID;
newRev.Name = resourceName;
newRev.ChangeMask = newRev.ChangeMask | ResourceBE.ChangeOperations.DELETEFLAG;
return newRev;
}
private XDoc AppendPropertyXml(XDoc doc, ResourceBE property, XUri parentResourceUri, string propSuffix, bool? explicitRevisionInfo, uint? contentCutoff, Dictionary<uint, UserBE> usersById) {
bool requiresEnd = false;
explicitRevisionInfo = explicitRevisionInfo ?? false;
string propElement = string.IsNullOrEmpty(propSuffix) ? "property" : "property." + propSuffix;
if(doc == null || doc.IsEmpty) {
doc = new XDoc(propElement);
} else {
doc.Start(propElement);
requiresEnd = true;
}
//Build the base uri to the property
bool includeContents = property.Size <= (contentCutoff ?? DEFAULT_CONTENT_CUTOFF) &&
(property.MimeType.Match(MimeType.ANY_TEXT)
);
//TODO: contents null check
doc.Attr("name", property.Name)
.Attr("href", /*explicitRevisionInfo.Value ? property.PropertyInfoUri(parentResourceUri, true) : */property.PropertyInfoUri(parentResourceUri));
if(property.IsHeadRevision()) {
doc.Attr("etag", property.ETag());
}
/* PROPERTY REVISIONS: if(!property.IsHeadRevision() || explicitRevisionInfo.Value) {
revisions not currently exposed.
doc.Attr("revision", property.Revision);
}
*/
/* PROPERTY REVISIONS: doc.Start("revisions")
.Attr("count", property.ResourceHeadRevision)
.Attr("href", property.UriRevisions())
.End();
*/
string content = null;
if(includeContents) {
content = property.Content.ToText();
}
doc.Start("contents")
.Attr("type", property.MimeType.ToString())
.Attr("size", property.Size)
.Attr("href", /*PROPERTY REVISIONS: explicitRevisionInfo.Value ? property.PropertyContentUri(true) : */property.PropertyContentUri(parentResourceUri))
.Value(content)
.End();
doc.Elem("date.modified", property.Timestamp);
UserBE userModified;
usersById.TryGetValue(property.UserId, out userModified);
if(userModified != null) {
doc.Add(UserBL.GetUserXml(userModified, "modified", Utils.ShowPrivateUserInfo(userModified)));
}
doc.Elem("change-description", property.ChangeDescription);
if(property.Deleted) {
UserBE userDeleted;
usersById.TryGetValue(property.UserId, out userDeleted);
if(userDeleted != null) {
doc.Add(UserBL.GetUserXml(userDeleted, "deleted", Utils.ShowPrivateUserInfo(userDeleted)));
}
doc.Elem("date.deleted", property.Timestamp);
}
if(requiresEnd) {
doc.End(); //property
}
return doc;
}
public virtual ResourceBE BuildRevForNewResource(uint? parentId, ResourceBE.ParentType parentType, string resourcename, MimeType mimeType, uint size, string description, ResourceBE.Type resourceType, uint userId, ResourceContentBE content) {
ResourceBE newResource = BuildRevForNewResource(resourcename, mimeType, size, description, resourceType, userId, content);
switch(parentType) {
case ResourceBE.ParentType.PAGE:
newResource.ParentPageId = parentId;
break;
case ResourceBE.ParentType.USER:
newResource.ParentUserId = parentId;
break;
default:
newResource.ParentId = parentId;
break;
}
newResource.ChangeMask = newResource.ChangeMask | ResourceBE.ChangeOperations.PARENT;
return newResource;
}
public ResourceBE CreateProperty(uint? parentId, XUri parentUri, ResourceBE.ParentType parentType, string name, ResourceContentBE content, string description, string etag, AbortEnum abort) {
//TODO: The parent resource isn't verified when the resource name and the parent info is given
ResourceBE prop = _resourceBL.GetResource(parentId, parentType, ResourceBE.Type.PROPERTY, name, DeletionFilter.ACTIVEONLY);
if(prop != null) {
switch(abort) {
case AbortEnum.Exists:
throw new PropertyExistsConflictException(name);
case AbortEnum.Modified:
_resourceBL.ValidateEtag(etag, prop, true);
break;
}
prop = _resourceBL.BuildRevForContentUpdate(prop, content.MimeType, content.Size, description, null, content);
prop = _resourceBL.SaveResource(prop);
DekiContext.Current.Instance.EventSink.PropertyUpdate(DekiContext.Current.Now, prop, DekiContext.Current.User, parentType, parentUri);
} else {
if((abort == AbortEnum.Modified) && !string.IsNullOrEmpty(etag)) {
throw new PropertyUnexpectedEtagConflictException();
}
prop = _resourceBL.BuildRevForNewResource(parentId, parentType, name, content.MimeType, content.Size, description, ResourceBE.Type.PROPERTY, DekiContext.Current.User.ID, content);
prop = _resourceBL.SaveResource(prop);
DekiContext.Current.Instance.EventSink.PropertyCreate(DekiContext.Current.Now, prop, DekiContext.Current.User, parentType, parentUri);
}
return prop;
}
private ResourceBE BuildRevForNewResource(string resourcename, MimeType mimeType, uint size, string description, ResourceBE.Type resourceType, uint userId, ResourceContentBE content) {
ResourceBE newResource = new ResourceBE(resourceType);
newResource.Name = resourcename;
newResource.ChangeMask = newResource.ChangeMask | ResourceBE.ChangeOperations.NAME;
newResource.Size = size;
newResource.MimeType = mimeType;
newResource.ChangeDescription = description;
newResource.ResourceCreateUserId = newResource.ResourceUpdateUserId = newResource.UserId = userId;
newResource.ChangeSetId = 0;
newResource.Timestamp = newResource.ResourceCreateTimestamp = newResource.ResourceUpdateTimestamp = DateTime.UtcNow;
newResource.Content = content;
newResource.ChangeMask = newResource.ChangeMask | ResourceBE.ChangeOperations.CONTENT;
newResource.ResourceHeadRevision = ResourceBE.TAILREVISION;
newResource.Revision = ResourceBE.TAILREVISION;
newResource.IsHidden = false;
return newResource;
}