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Write documentation for the archive API. Also add another test.

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update #306
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JC Brand 2015-07-12 21:27:22 +02:00
parent dca0472e80
commit 69de033cea
2 changed files with 173 additions and 11 deletions
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135
docs/source/development.rst
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@ -146,7 +146,7 @@ Developer API
Earlier versions of Converse.js might have different API methods or none at all.
In the Converse.js API, you traverse towards a logical grouping, from
which you can then call certain standardised accessors and mutators, like::
which you can then call certain standardised accessors and mutators, such as::
.get
.set
@ -202,6 +202,139 @@ Example:
roster_groups: true
});
The "archive" grouping
----------------------
Converse.js supports the *Message Archive Management*
(`XEP-0313 <https://xmpp.org/extensions/xep-0313.html>`_) protocol,
through which it is able to query an XMPP server for archived messages.
query
~~~~~
The ``query`` method is used to query for archived messages.
It accepts the following optional parameters:
* **options** an object containing the query parameters. Valid query parameters
are ``with``, ``start``, ``end``, ``first``, ``last``, ``after``, ``before``, ``index`` and ``count``.
* **callback** is the callback method that will be called when all the messages
have been received.
* **errback** is the callback method to be called when an error is returned by
the XMPP server, for example when it doesn't support message archiving.
Examples
^^^^^^^^
**Requesting all archived messages**
The simplest query that can be made is to simply not pass in any parameters.
Such a query will return all archived messages for the current user.
Generally, you'll however always want to pass in a callback method, to receive
the returned messages.
.. code-block:: javascript
var errback = function (iq) {
// The query was not successful, perhaps inform the user?
// The IQ stanza returned by the XMPP server is passed in, so that you
// may inspect it and determine what the problem was.
}
var callback = function (messages) {
// Do something with the messages, like showing them in your webpage.
}
converse.archive.query(callback, errback))
**Requesting all archived messages for a particular contact or room**
To query for messages sent between the current user and another user or room,
the query options need to contain the the JID (Jabber ID) of the user or
room under the ``with`` key.
.. code-block:: javascript
// For a particular user
converse.archive.query({'with': 'john@doe.net'}, callback, errback);)
// For a particular room
converse.archive.query({'with': 'discuss@conference.doglovers.net'}, callback, errback);)
**Requesting all archived messages before or after a certain date**
The ``start`` and ``end`` parameters are used to query for messages
within a certain timeframe. The passed in date values may either be ISO8601
formatted date strings, or Javascript Date objects.
.. code-block:: javascript
var options = {
'with': 'john@doe.net',
'start': '2010-06-07T00:00:00Z',
'end': '2010-07-07T13:23:54Z'
};
converse.archive.query(options, callback, errback);
**Limiting the amount of messages returned**
The amount of returned messages may be limited with the ``max`` parameter.
By default, the messages are returned from oldest to newest.
.. code-block:: javascript
// Return maximum 10 archived messages
converse.archive.query({'with': 'john@doe.net', 'max':10}, callback, errback);
**Paging forwards through a set of archived messages**
When limiting the amount of messages returned per query, you might want to
repeatedly make a further query to fetch the next batch of messages.
To simplify this usecase for you, the callback method receives not only an array
with the returned archived messages, but also a special RSM (*Result Set
Management*) object which contains the query parameters you passed in, as well
as two utility methods ``next``, and ``previous``.
When you call one of these utility methods on the returned RSM object, and then
pass the result into a new query, you'll receive the next or previous batch of
archived messages.
.. code-block:: javascript
var callback = function (messages, rsm) {
// Do something with the messages, like showing them in your webpage.
// ...
// You can now use the returned "rsm" object, to fetch the next batch of messages:
converse.archive.query(rsm.next(), callback, errback))
}
converse.archive.query({'with': 'john@doe.net', 'max':10}, callback, errback);
**Paging backwards through a set of archived messages**
To page backwards through the archive, you need to know the UID of the message
which you'd like to page backwards from and then pass that as value for the
``before`` parameter. If you simply want to page backwards from the most recent
message, pass in the ``before`` parameter with a value of ``null``.
.. code-block:: javascript
converse.archive.query({'before': null, 'max':5}, function (message, rsm) {
// Do something with the messages, like showing them in your webpage.
// ...
// You can now use the returned "rsm" object, to fetch the previous batch of messages:
rsm.previous(); // Call previous method, to update the object
// parameters so that the previous batch of messages will be returned.
rsm.count = 10; // Increase the page size (currently it's set to 1,
// because that was what we specified in our last query.
// Now we query again, to get the previous batch.
converse.archive.query(rsm, callback, errback);
}
The "user" grouping
-------------------

29
spec/mam.js
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@ -227,6 +227,35 @@
Date.prototype.getTimezoneOffset = getTimezoneOffset;
});
it("accepts \"before\" with an empty string as value to reverse the order", function () {
var sent_stanza, IQ_id;
var sendIQ = converse.connection.sendIQ;
spyOn(converse.connection, 'sendIQ').andCallFake(function (iq, callback, errback) {
sent_stanza = iq;
IQ_id = sendIQ.bind(this)(iq, callback, errback);
});
if (!converse.features.findWhere({'var': Strophe.NS.MAM})) {
converse.features.create({'var': Strophe.NS.MAM});
}
converse_api.archive.query({'before': '', 'max':10});
var queryid = $(sent_stanza.toString()).find('query').attr('queryid');
expect(sent_stanza.toString()).toBe(
"<iq type='set' xmlns='jabber:client' id='"+IQ_id+"'>"+
"<query xmlns='urn:xmpp:mam:0' queryid='"+queryid+"'>"+
"<x xmlns='jabber:x:data'>"+
"<field var='FORM_TYPE'>"+
"<value>urn:xmpp:mam:0</value>"+
"</field>"+
"</x>"+
"<set xmlns='http://jabber.org/protocol/rsm'>"+
"<max>10</max>"+
"<before></before>"+
"</set>"+
"</query>"+
"</iq>"
);
});
}, converse, mock, test_utils));
describe("The default preference", $.proxy(function (mock, test_utils) {