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convert cah.ajax into an object to make things a little neater

This commit is contained in:
Andy Janata 2011-12-24 19:38:02 -08:00
parent 0183ca5357
commit 37cc770ed3
1 changed files with 31 additions and 20 deletions
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51
WebContent/js/cah.ajax.js
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@ -8,25 +8,36 @@ cah.ajax = {};
cah.ajax.ErrorHandlers = {};
cah.ajax.SuccessHandlers = {};
// TODO run a timer to see if we have more than X pending requests and delay further ones until
// we get results
cah.ajax.pendingRequests = {};
cah.ajax.serial = 0;
/**
* Create a new cah ajax helper.
*
* @returns {cah.ajax.lib}
* @constructor
*/
cah.ajax.lib = function() {
// TODO run a timer to see if we have more than X pending requests and delay further ones until
// we get results
this.pendingRequests = {};
this.serial = 0;
};
$(document).ready(function() {
/**
* Singleton instance for ajax utility.
*
* @type {cah.ajax.lib}
*/
cah.Ajax = new cah.ajax.lib();
$.ajaxSetup({
cache : false,
error : cah.ajax.error,
success : cah.ajax.done,
context : cah.Ajax,
error : cah.Ajax.error,
success : cah.Ajax.done,
timeout : cah.DEBUG ? undefined : 10 * 1000, // 10 second timeout for normal requests
// timeout : 1, // 10 second timeout for normal requests
type : 'POST',
url : '/cah/AjaxServlet'
});
// see if we already exist on the server so we can resume
cah.ajax.request("firstload", {});
});
/**
@ -42,48 +53,48 @@ $(document).ready(function() {
* @param {?function(jqXHR,textStatus,errorThrown)}
* [opt_errback] Optional error callback.
*/
cah.ajax.request = function(op, data, opt_errback) {
cah.ajax.lib.prototype.request = function(op, data, opt_errback) {
data.op = op;
data.serial = cah.ajax.serial++;
data.serial = this.serial++;
var jqXHR = $.ajax({
data : data
});
cah.ajax.pendingRequests[data.serial] = data;
this.pendingRequests[data.serial] = data;
cah.log.debug("ajax req", data);
if (opt_errback) {
jqXHR.fail(opt_errback);
}
};
cah.ajax.error = function(jqXHR, textStatus, errorThrown) {
cah.ajax.lib.prototype.error = function(jqXHR, textStatus, errorThrown) {
// TODO deal with this somehow
// and figure out which request it was so we can remove it from pending
debugger;
cah.log.error(textStatus);
};
cah.ajax.done = function(data) {
cah.ajax.lib.prototype.done = function(data) {
cah.log.debug("ajax done", data);
if (data['error']) {
// TODO cancel any timers or whatever we may have, and disable interface
var req = cah.ajax.pendingRequests[data.serial];
var req = this.pendingRequests[data.serial];
if (req && cah.ajax.ErrorHandlers[req.op]) {
cah.ajax.ErrorHandlers[req.op](data);
} else {
cah.log.error(data.error_message);
}
} else {
var req = cah.ajax.pendingRequests[data.serial];
var req = this.pendingRequests[data.serial];
if (req && cah.ajax.SuccessHandlers[req.op]) {
cah.ajax.SuccessHandlers[req.op](data);
} else if (req) {
cah.log.error("Unhandled response for op " + req.op);
} else {
cah.log.error("Unknown response for serial " + data.serial);
cah.log.error("Response for unknown serial " + data.serial);
}
}
if (data.serial >= 0 && cah.ajax.pendingRequests[data.serial]) {
delete cah.ajax.pendingRequests[data.serial];
if (data.serial >= 0 && this.pendingRequests[data.serial]) {
delete this.pendingRequests[data.serial];
}
};