mirror of
https://github.com/EGroupware/egroupware.git
synced 2024-10-05 17:42:18 +02:00
Commited egw_data.js
This commit is contained in:
Andreas Stöckel
parent
986c733c33
commit
a45f2d5c69
@ -28,6 +28,7 @@
|
||||
egw_css;
|
||||
egw_calendar;
|
||||
egw_ready;
|
||||
egw_data;
|
||||
// egw_jquery;
|
||||
*/
|
||||
|
||||
|
||||
378
phpgwapi/js/jsapi/egw_data.js
Normal file
378
phpgwapi/js/jsapi/egw_data.js
Normal file
@ -0,0 +1,378 @@
|
||||
/**
|
||||
* eGroupWare eTemplate2
|
||||
*
|
||||
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
|
||||
* @package etemplate
|
||||
* @subpackage api
|
||||
* @link http://www.egroupware.org
|
||||
* @author Andreas Stöckel
|
||||
* @copyright Stylite 2012
|
||||
* @version $Id$
|
||||
*/
|
||||
|
||||
/*egw:uses
|
||||
egw_core;
|
||||
egw_debug;
|
||||
*/
|
||||
|
||||
"use strict";
|
||||
|
||||
egw.extend("data", egw.MODULE_APP_LOCAL, function (_app, _wnd) {
|
||||
|
||||
/**
|
||||
* The uid function generates a session-unique id for the current
|
||||
* application by appending the application name to the given uid.
|
||||
*/
|
||||
function UID(_uid)
|
||||
{
|
||||
return _app + "::" + _uid;
|
||||
}
|
||||
|
||||
function parseServerResponse(_result, _execId, _queriedRange, _filters,
|
||||
_lastModification, _callback, _context)
|
||||
{
|
||||
// Check whether the result is valid -- so "result" has to be an object
|
||||
// consting of "order" and "data"
|
||||
if (!(_result && typeof _result.order !== "undefined"
|
||||
&& typeof _result.data !== "undefined"))
|
||||
{
|
||||
egw.debug("error", "Invalid result for 'dataFetch'");
|
||||
}
|
||||
|
||||
// The "uidsMissing" contains a list of missing uids.
|
||||
var uidsMissing = [];
|
||||
|
||||
if (_result.order && _result.data)
|
||||
{
|
||||
var order = [];
|
||||
|
||||
// Load all data entries that have been sent
|
||||
for (var key in _result.data)
|
||||
{
|
||||
var uid = UID(key);
|
||||
egw.dataStoreUID(uid, _result.data[key]);
|
||||
}
|
||||
|
||||
// Iterate over the order entries and check whether all uids are
|
||||
// available
|
||||
for (var i = 0; i < _result.order.length; i++)
|
||||
{
|
||||
// Calculate the actual uid and store it
|
||||
var uid = UID(_result.order[i]);
|
||||
order.push(uid);
|
||||
|
||||
// Check whether the data for that row is loaded, if no, update
|
||||
// the "uidsMissing" variable
|
||||
if (!egw.dataHasUID(uid))
|
||||
{
|
||||
uidsMissing.push(_result.order[i]);
|
||||
}
|
||||
}
|
||||
|
||||
// Call the callback function and pass the calculated "order" array
|
||||
// as well as the "total" count and the "timestamp" to the listener.
|
||||
if (_callback)
|
||||
{
|
||||
_callback.call(_context, {
|
||||
"order": order,
|
||||
"lastModification":
|
||||
typeof _result.lastModification === "undefined"
|
||||
? _lastModification : _result.lastModification,
|
||||
"total": _result.total,
|
||||
"readonlys": _result.readonlys
|
||||
});
|
||||
}
|
||||
|
||||
// Fetch the missing uids
|
||||
if (uidsMissing.length > 0)
|
||||
{
|
||||
this.dataFetch(_execId, _queriedRange, _filters, null, null,
|
||||
uidsMissing, null, null);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return {
|
||||
/**
|
||||
* The dataFetch function provides an abstraction layer for the
|
||||
* corresponding "etemplate_widget_nextmatch::ajax_get_rows" function.
|
||||
* The server returns the following structure:
|
||||
* {
|
||||
* order: [uid, ...],
|
||||
* data:
|
||||
* {
|
||||
* uid0: data,
|
||||
* ...
|
||||
* uidN: data
|
||||
* },
|
||||
* total: <TOTAL COUNT>,
|
||||
* lastModification: <LAST MODIFICATION TIMESTAMP>,
|
||||
* readonlys: <READONLYS>
|
||||
* }
|
||||
* If order/data is null, this means that nothing has changed for the
|
||||
* given range.
|
||||
* The fetchRows function stores new data for the uid's inside the
|
||||
* local data storage, the grid views are then capable of querying the
|
||||
* data for those uids from the local storage using the
|
||||
* "dataRegisterUID" function.
|
||||
*
|
||||
* @param execId is the execution context of the etemplate instance
|
||||
* you're querying the data for.
|
||||
* @param queriedRange is an object of the following form:
|
||||
* {
|
||||
* start: <START INDEX>,
|
||||
* count: <COUNT OF ENTRIES>
|
||||
* }
|
||||
* The range always corresponds to the given filter settings.
|
||||
* @param filters contains the filter settings. The filter settings are
|
||||
* those which are crucial for the mapping between index and uid.
|
||||
* @param knownRanges is an array of the above form and informs the
|
||||
* server which ranges are already known to the client. If there are
|
||||
* changes in the knownRanges (like new elements being inserted or old
|
||||
* ones being removed). This parameter may be null in order to
|
||||
* indicate that the client currently has no data for the given filter
|
||||
* settings.
|
||||
* @param lastModification is the last timestamp that was returned from
|
||||
* the server and for which the client has data. It may be null in
|
||||
* order to indicate, that the client currently has no data or needs a
|
||||
* complete refresh.
|
||||
* @param callback is the function that should get called, once the data
|
||||
* is available. The data passed to the callback function has the
|
||||
* following form:
|
||||
* {
|
||||
* order: [uid, ...],
|
||||
* total: <TOTAL COUNT>,
|
||||
* lastModification: <LAST MODIFICATION TIMESTAMP>,
|
||||
* readonlys: <READONLYS>
|
||||
* }
|
||||
* Please note that the "uids" comming from the server and the ones
|
||||
* being parsed to the callback function differ. While the uids
|
||||
* which are returned from the server are only unique inside the
|
||||
* application, the uids which are used on the client are "globally"
|
||||
* unique.
|
||||
* @param context is the context in which the callback function will get
|
||||
* called.
|
||||
*/
|
||||
dataFetch: function (_execId, _queriedRange, _filters, _knownRanges,
|
||||
_lastModification, _uids, _callback, _context)
|
||||
{
|
||||
var request = egw.json(
|
||||
"etemplate_widget_nextmatch::ajax_get_rows::etemplate",
|
||||
[
|
||||
_execId,
|
||||
_queriedRange,
|
||||
_filters,
|
||||
_knownRanges,
|
||||
_lastModification,
|
||||
_uids
|
||||
],
|
||||
function(result) {
|
||||
parseServerResponse.call(
|
||||
this,
|
||||
result,
|
||||
_execId,
|
||||
_queriedRange,
|
||||
_filters,
|
||||
_lastModification,
|
||||
_callback,
|
||||
_context
|
||||
);
|
||||
},
|
||||
this
|
||||
);
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
});
|
||||
|
||||
egw.extend("data_storage", egw.MODULE_GLOBAL, function (_app, _wnd) {
|
||||
|
||||
/**
|
||||
* The localStorage object is used to store the data for certain uids. An
|
||||
* entry inside the localStorage object looks like the following:
|
||||
* {
|
||||
* timestamp: <CREATION TIMESTAMP (local)>,
|
||||
* data: <DATA>
|
||||
* }
|
||||
*/
|
||||
var localStorage = {};
|
||||
|
||||
/**
|
||||
* The registeredCallbacks map is used to store all callbacks registerd for
|
||||
* a certain uid.
|
||||
*/
|
||||
var registeredCallbacks = {};
|
||||
|
||||
/**
|
||||
* This constant specifies the maximum age of entries in the local storrage
|
||||
* in milliseconds
|
||||
*/
|
||||
var MAX_AGE = 5 * 60 * 1000; // 5 mins
|
||||
|
||||
/**
|
||||
* This constant specifies the interval in which the local storage gets
|
||||
* cleaned up.
|
||||
*/
|
||||
var CLEANUP_INTERVAL = 30 * 1000; // 30 sec
|
||||
|
||||
/**
|
||||
* Register a cleanup function, which throws away all data entries which are
|
||||
* older than the given age.
|
||||
*/
|
||||
_wnd.setInterval(function() {
|
||||
// Get the current timestamp
|
||||
var time = (new Date).getTime();
|
||||
|
||||
// Iterate over the local storage
|
||||
for (var uid in localStorage)
|
||||
{
|
||||
if (time - localStorage[uid].timestamp > MAX_AGE)
|
||||
{
|
||||
// Unregister all registered callbacks for that uid
|
||||
egw.dataUnregisterUID(uid);
|
||||
|
||||
// Delete the data from the localStorage
|
||||
delete localStorage[uid];
|
||||
}
|
||||
}
|
||||
}, CLEANUP_INTERVAL);
|
||||
|
||||
return {
|
||||
|
||||
/**
|
||||
* Registers the intrest in a certain uid for a callback function. If
|
||||
* the data for that uid changes or gets loaded, the given callback
|
||||
* function is called. If the data for the given uid is available at the
|
||||
* time of registering the callback, the callback is called immediately.
|
||||
*
|
||||
* @param _uid is the uid for which the callback should be registered.
|
||||
* @param _callback is the callback which should get called.
|
||||
* @param _context is an optional parameter which can
|
||||
*/
|
||||
dataRegisterUID: function (_uid, _callback, _context) {
|
||||
// Create the slot for the uid if it does not exist now
|
||||
if (typeof registeredCallbacks[_uid] === "undefined")
|
||||
{
|
||||
registeredCallbacks[_uid] = [];
|
||||
}
|
||||
|
||||
// Store the given callback
|
||||
registeredCallbacks[_uid].push({
|
||||
"callback": _callback,
|
||||
"context": _context ? _context : null
|
||||
});
|
||||
|
||||
// Check whether the data is available -- if yes, immediately call
|
||||
// back the callback function
|
||||
if (typeof localStorage[_uid] !== "undefined")
|
||||
{
|
||||
// Update the timestamp and call the given callback function
|
||||
localStorage[_uid].timestamp = (new Date).getTime();
|
||||
_callback.call(_context, localStorage[_uid].data);
|
||||
}
|
||||
},
|
||||
|
||||
/**
|
||||
* Unregisters the intrest of updates for a certain data uid.
|
||||
*
|
||||
* @param _uid is the data uid for which the callbacks should be
|
||||
* unregistered.
|
||||
* @param _callback specifies the specific callback that should be
|
||||
* unregistered. If it evaluates to false, all callbacks (or those
|
||||
* matching the optionally given context) are removed.
|
||||
* @param _context specifies the callback context that should be
|
||||
* unregistered. If it evaluates to false, all callbacks (or those
|
||||
* matching the optionally given callback function) are removed.
|
||||
*/
|
||||
dataUnregisterUID: function (_uid, _callback, _context) {
|
||||
|
||||
// Force the optional parameters to be exactly null
|
||||
_callback = _callback ? _callback : null;
|
||||
_context = _context ? _context : null;
|
||||
|
||||
if (typeof registeredCallbacks[_uid] !== "undefined")
|
||||
{
|
||||
|
||||
// Iterate over the registered callbacks for that uid and delete
|
||||
// all callbacks pointing to the given callback and context
|
||||
for (var i = registeredCallbacks[_uid].length - 1; i >= 0; i--)
|
||||
{
|
||||
if ((!_callback || registeredCallbacks[_uid][i].callback === _callback)
|
||||
&& (!_context || registeredCallbacks[_uid][i].context === _context))
|
||||
{
|
||||
registeredCallbacks.splice(i, 1);
|
||||
}
|
||||
}
|
||||
|
||||
// Delete the slot if no callback is left for the uid
|
||||
if (registeredCallbacks[_uid].length === 0)
|
||||
{
|
||||
delete registeredCallbacks[_uid];
|
||||
}
|
||||
}
|
||||
},
|
||||
|
||||
/**
|
||||
* Returns whether data is available for the given uid.
|
||||
*
|
||||
* @param uid is the uid for which should be checked whether it has some
|
||||
* data.
|
||||
*/
|
||||
dataHasUID: function (_uid) {
|
||||
return typeof this.localStorage[_uid] !== "undefined";
|
||||
},
|
||||
|
||||
/**
|
||||
* Stores data for the uid and calls all callback functions registered
|
||||
* for that uid.
|
||||
*
|
||||
* @param _uid is the uid for which the data should be saved.
|
||||
* @param _data is the data which should be saved.
|
||||
*/
|
||||
dataStoreUID: function (_uid, _data) {
|
||||
// Get the current unix timestamp
|
||||
var timestamp = (new Date).getTime();
|
||||
|
||||
// Store the data in the local storage
|
||||
localStorage[_uid] = {
|
||||
"timestamp": timestamp,
|
||||
"data": _data
|
||||
};
|
||||
|
||||
// Inform all registered callback functions and pass the data to
|
||||
// those.
|
||||
if (typeof registeredCallbacks[_uid] != "undefined")
|
||||
{
|
||||
for (var i = 0; i < this.registeredCallbacks.length; i++)
|
||||
{
|
||||
this.registeredCallbacks[i].callback.call(
|
||||
this.registeredCallbacks[i].context,
|
||||
_data
|
||||
);
|
||||
}
|
||||
}
|
||||
},
|
||||
|
||||
/**
|
||||
* Deletes the data for a certain uid from the local storage and
|
||||
* unregisters all callback functions associated to it.
|
||||
*
|
||||
* @param uid is the uid which should be deleted.
|
||||
*/
|
||||
dataDeleteUID: function (_uid) {
|
||||
if (typeof localStorage[_uid] !== "undefined")
|
||||
{
|
||||
// Delete the element from the local storage
|
||||
delete localStorage[_uid];
|
||||
|
||||
// Unregister all callbacks for that uid
|
||||
this.dataUnregisterUID(_uid);
|
||||
}
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
});
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user