define([
'./array',
'../utils',
'jquery'
], function (ArrayAdapter, Utils, $) {
function AjaxAdapter ($element, options) {
this.ajaxOptions = this._applyDefaults(options.get('ajax'));
if (this.ajaxOptions.processResults != null) {
this.processResults = this.ajaxOptions.processResults;
}
AjaxAdapter.__super__.constructor.call(this, $element, options);
}
Utils.Extend(AjaxAdapter, ArrayAdapter);
AjaxAdapter.prototype._applyDefaults = function (options) {
var defaults = {
data: function (params) {
return $.extend({}, params, {
q: params.term
});
},
transport: function (params, success, failure) {
var $request = $.ajax(params);
$request.then(success);
$request.fail(failure);
return $request;
}
};
return $.extend({}, defaults, options, true);
};
AjaxAdapter.prototype.processResults = function (results) {
return results;
};
AjaxAdapter.prototype.query = function (params, callback) {
var matches = [];
var self = this;
if (this._request != null) {
// JSONP requests cannot always be aborted
if ($.isFunction(this._request.abort)) {
this._request.abort();
}
this._request = null;
}
var options = $.extend({
type: 'GET'
}, this.ajaxOptions);
if (typeof options.url === 'function') {
options.url = options.url.call(this.$element, params);
}
if (typeof options.data === 'function') {
options.data = options.data.call(this.$element, params);
}
function request () {
var $request = options.transport(options, function (data) {
var results = self.processResults(data, params);
if (self.options.get('debug') && window.console && console.error) {
// Check to make sure that the response included a `results` key.
if (!results || !results.results || !$.isArray(results.results)) {
console.error(
'Select2: The AJAX results did not return an array in the ' +
'`results` key of the response.'
);
}
}
callback(results);
}, function () {
// Attempt to detect if a request was aborted
// Only works if the transport exposes a status property
if ($request.status && $request.status === '0') {
return;
}
self.trigger('results:message', {
message: 'errorLoading'
});
});
self._request = $request;
}
if (this.ajaxOptions.delay && params.term != null) {
if (this._queryTimeout) {
window.clearTimeout(this._queryTimeout);
}
this._queryTimeout = window.setTimeout(request, this.ajaxOptions.delay);
} else {
request();
}
};
return AjaxAdapter;
});
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