I don't really understand the solution 2. We already have an EntityReference class in entityReference.js, with a string serializer and a string parser. If we use a JSON format to describe a reference, we will still have to parse it to create an EntityReference object, and this parser does not exist yet. So what is the benefit? I only see drawbacks: - A JSON reference is a lot more verbose. - From the java side, we need to serialize the reference to a JSON representation which is probably more costly than serializing to a string. - We use string representations in a lot of places, and suddenly we should use JSON but only when we do JavaScript... So +1 for the solution 1. In any case, it seems a good idea to use references in JS code. Thanks, Guillaume 2015-08-06 14:25 GMT+02:00 Eduard Moraru <[email protected]>:
I agree with Thomas that it would be best to use EntityReference -> JSON as much as possible (when passing the reference from velocity to javascript, server-side), however, man times when you need a reference you also end up building a new reference (on the client-side, i.e. javascript) so we can`t really avoid having a strong javascript EntityReference API + serializer/resolver.
Also, making a HTTP request from JS to resolve a string reference on the server (and getting a JSON result) is not really an option IMO (specially if you do that a lot).
So +1 to using reference in javascript code.
Thanks, Eduard
On Thu, Jul 30, 2015 at 11:50 AM, Thomas Mortagne < [email protected]
wrote:
Direct EntityReference -> JSON serialisation would provide a strong standard (we already have tool to make sure we never break EntityReference) and it would make JS and Java sides more consistent. Now In some cases we will still need to support parsing a String reference in JS I think.
On Thu, Jul 30, 2015 at 10:38 AM, [email protected] <[email protected]
wrote:
Hi Marius/all,
On 30 Jul 2015 at 10:26:49, Marius Dumitru Florea ( [email protected](mailto:[email protected])) wrote:
+1
Another option could be to pass a JSON serialization of the reference. Thomas has recently fixed some issues that were preventing JSON serialization of an entity reference. It should work fine now:
$jsontool.serialize($documentReference)
should produce something close to:
{ name: 'Page', type: 'DOCUMENT', parent: { name: 'Space2', type: 'SPACE', parent: { ... } } }
It's more verbose obviously. For this we need to modify a bit entityReference.js though, because it expects the entity type to be an int.
Indeed there are only 2 global solutions: * Solution 1: Pass the seralized String reference and have the js perform the resolve. This also means that the java code may need to do a serialize. So this has the drawback of doing a serialize + resolve. It has the advantage of being a one-liner from JS. * Solution 2: Pass the individual elements of a reference so that the JS doesn’t have to call resolve. This can be done in several ways:
option 1:
<div class=“metadata”> <div class=“sourcewiki”>wiki</div> <div class=“sourcepage”>page</div> <div class=“sourcespaces”> <div>space1</div> <div>space2</div> </div> </div>
option 2:
The JSON you suggest above. However, how would the java code pass this into HTML? Inside a tag’s text, as in:
<div class=“metadata”> … json here?... </div>
Inside a <script> tag directly?
Note that option2 has a big advantage over option 1: JS knows JSON natively and thus there’s no need to implement any parsing at the JS level.
Compared to Solution 1, the advantage would to avoid a resolve() call on the JS side. On the java side we’ll still need the serialize() call (which will possibly take slightly longer than the string serialization).
Overall Solution 2/option2 could be a better solution indeed.
What do others think?
Thanks -Vincent
Thanks, Marius
On Wed, Jul 29, 2015 at 4:34 PM, [email protected] wrote:
Hi devs,
In the past we use to pass the wiki, space and page as 3 variables to JS code. For example in dashboard.js we currently have:
this.sourcePage = this.element.down('.metadata .sourcepage').innerHTML; this.sourceSpace = this.element.down('.metadata .sourcespace').innerHTML; this.sourceWiki = this.element.down('.metadata .sourcewiki').innerHTML;
Now that we need to handle Nested Spaces, it’s more complex and I’m proposing to change our best practice and instead to pass a full reference, as in:
this.sourceReference = XWiki.Model.resolve(this.element.down('.metadata .source').innerHTML, XWiki.EntityType.DOCUMENT);
More generally the idea would be to do the same as we do in Java code, i.e. to start stopping passing several parameters to functions and instead to use XWiki.EntityReference (or XWiki.DocumentReference, etc).
For example for dashboard.js this allows to replace:
var link = new Element('a', {'href' : this.sourceURL}); link.update(this.sourceWiki + ':' + this.sourceSpace + '.' + this.sourcePage);
With:
var link = new Element('a', {'href' : this.sourceURL}); link.update(XWiki.Model.serialize(this.sourceReference));
WDYT?
Thanks -Vincent
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-- Guillaume Delhumeau ([email protected]) Research & Development Engineer at XWiki SAS Committer on the XWiki.org project