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/* eslint-disable */
const AjaxFilter = {
init: function(hook) {
this.destroyed = false;
this.hook = hook;
this.notLoading();
this.eventWrapper = {};
this.eventWrapper.debounceTrigger = this.debounceTrigger.bind(this);
this.hook.trigger.addEventListener('keydown.dl', this.eventWrapper.debounceTrigger);
this.hook.trigger.addEventListener('focus', this.eventWrapper.debounceTrigger);
this.trigger(true);
},
notLoading: function notLoading() {
this.loading = false;
},
debounceTrigger: function debounceTrigger(e) {
var NON_CHARACTER_KEYS = [16, 17, 18, 20, 37, 38, 39, 40, 91, 93];
var invalidKeyPressed = NON_CHARACTER_KEYS.indexOf(e.detail.which || e.detail.keyCode) > -1;
var focusEvent = e.type === 'focus';
if (invalidKeyPressed || this.loading) {
return;
}
if (this.timeout) {
clearTimeout(this.timeout);
}
this.timeout = setTimeout(this.trigger.bind(this, focusEvent), 200);
},
trigger: function trigger(getEntireList) {
var config = this.hook.config.AjaxFilter;
var searchValue = this.trigger.value;
if (!config || !config.endpoint || !config.searchKey) {
return;
}
if (config.searchValueFunction) {
searchValue = config.searchValueFunction();
}
if (config.loadingTemplate && this.hook.list.data === undefined ||
this.hook.list.data.length === 0) {
var dynamicList = this.hook.list.list.querySelector('[data-dynamic]');
var loadingTemplate = document.createElement('div');
loadingTemplate.innerHTML = config.loadingTemplate;
loadingTemplate.setAttribute('data-loading-template', true);
this.listTemplate = dynamicList.outerHTML;
dynamicList.outerHTML = loadingTemplate.outerHTML;
}
if (getEntireList) {
searchValue = '';
}
if (config.searchKey === searchValue) {
return this.list.show();
}
this.loading = true;
var params = config.params || {};
params[config.searchKey] = searchValue;
var self = this;
self.cache = self.cache || {};
var url = config.endpoint + this.buildParams(params);
var urlCachedData = self.cache[url];
if (urlCachedData) {
self._loadData(urlCachedData, config, self);
} else {
this._loadUrlData(url)
.then(function(data) {
self._loadData(data, config, self);
}, config.onError).catch(config.onError);
}
},
_loadUrlData: function _loadUrlData(url) {
var self = this;
return new Promise(function(resolve, reject) {
var xhr = new XMLHttpRequest;
xhr.open('GET', url, true);
xhr.onreadystatechange = function () {
if(xhr.readyState === XMLHttpRequest.DONE) {
if (xhr.status === 200) {
var data = JSON.parse(xhr.responseText);
self.cache[url] = data;
return resolve(data);
} else {
return reject([xhr.responseText, xhr.status]);
}
}
};
xhr.send();
});
},
_loadData: function _loadData(data, config, self) {
const list = self.hook.list;
if (config.loadingTemplate && list.data === undefined ||
list.data.length === 0) {
const dataLoadingTemplate = list.list.querySelector('[data-loading-template]');
if (dataLoadingTemplate) {
dataLoadingTemplate.outerHTML = self.listTemplate;
}
}
if (!self.destroyed) {
var hookListChildren = list.list.children;
var onlyDynamicList = hookListChildren.length === 1 && hookListChildren[0].hasAttribute('data-dynamic');
if (onlyDynamicList && data.length === 0) {
list.hide();
}
list.setData.call(list, data);
}
self.notLoading();
list.currentIndex = 0;
},
buildParams: function(params) {
if (!params) return '';
var paramsArray = Object.keys(params).map(function(param) {
return param + '=' + (params[param] || '');
});
return '?' + paramsArray.join('&');
},
destroy: function destroy() {
if (this.timeout)clearTimeout(this.timeout);
this.destroyed = true;
this.hook.trigger.removeEventListener('keydown.dl', this.eventWrapper.debounceTrigger);
this.hook.trigger.removeEventListener('focus', this.eventWrapper.debounceTrigger);
}
};
export default AjaxFilter;
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