diff options
Diffstat (limited to 'app/assets/javascripts/droplab/plugins/ajax_filter.js')
-rw-r--r-- | app/assets/javascripts/droplab/plugins/ajax_filter.js | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/app/assets/javascripts/droplab/plugins/ajax_filter.js b/app/assets/javascripts/droplab/plugins/ajax_filter.js new file mode 100644 index 00000000000..cfd7e2ca189 --- /dev/null +++ b/app/assets/javascripts/droplab/plugins/ajax_filter.js @@ -0,0 +1,133 @@ +/* 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; |