RestCollectionView ReqRes

This sample shows how you can extend the RestCollectionView class to create a custom RestCollectionViewReqRes class that talks to a ReqRes source.

This data source does not support server-side sorting or filtering.

Learn about FlexGrid | Loading Data Documentation | CollectionView API Reference

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; // import { RestCollectionViewReqRes } from './rest-collection-view-reqres'; import { CollectionViewNavigator } from '@mescius/wijmo.input'; import { FlexGrid } from '@mescius/wijmo.grid'; import { FlexGridFilter } from '@mescius/wijmo.grid.filter'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // create the grid to show the data let theGrid = new FlexGrid('#theGrid', { allowAddNew: true, allowDelete: true, showMarquee: true, selectionMode: 'MultiRange', deferResizing: true, alternatingRowStep: 0, // create RestCollectionViewReqRes itemsSource: new RestCollectionViewReqRes('users', { key: 'id', pageSize: 8 }) }); // auto-number row headers theGrid.topLeftCells.columns[0].cellTemplate = $ => $.text || ($.row.index + 1).toString(); // add the filter new FlexGridFilter(theGrid); // add the navigator new CollectionViewNavigator('#theNavigator', { cv: theGrid.collectionView, byPage: true }); // toggle pagination document.getElementById('paging').addEventListener('click', e => { let paging = e.target.checked, view = theGrid.collectionView; view.pageSize = paging ? 8 : 0; }); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo RestCollectionView ReqRes</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.21.5/system.src.js" integrity="sha512-skZbMyvYdNoZfLmiGn5ii6KmklM82rYX2uWctBhzaXPxJgiv4XBwJnFGr5k8s+6tE1pcR1nuTKghozJHyzMcoA==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div class="container-fluid"> <label> Paging <input id="paging" type="checkbox" checked> </label> <br /> <div id="theNavigator"></div> <div id="theGrid"></div> </div> </body> </html>
body { margin-bottom: 36pt; } .wj-flexgrid { max-height: 400px; }
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) { return new (P || (P = Promise))(function (resolve, reject) { function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } } function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } } function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); } step((generator = generator.apply(thisArg, _arguments || [])).next()); }); }; import { RestCollectionView } from '@mescius/wijmo.rest'; import { httpRequest, copy, asString, assert } from '@mescius/wijmo'; // regex used to parse dates const _rxDate = /^\d{4}\-\d{2}\-\d{2}T\d{2}\:\d{2}\:\d{2}|\/Date\([\d\-]*?\)/; /** * Class that extends {@link ServerCollectionViewBase} to support Reqres sources. * * For more details on Reqres sources, please see * https://reqres.in/ */ export class RestCollectionViewReqRes extends RestCollectionView { /** * Initializes a new instance of the {@link RestCollectionViewReqRes} class. * * @param tableName Name of the table (entity) to retrieve from the service. * @param options JavaScript object containing initialization data (property * values and event handlers) for the {@link ODataCollectionView}. */ constructor(tableName, options) { super(); this._url = 'https://reqres.in/api/'; this._tbl = asString(tableName); copy(this, options); // this source does not support server-side sorting, or filtering. this.sortOnServer = false; this.filterOnServer = false; } /** * Gets or the name of the key field. * * Key fields are required for update operations (add/remove/delete). */ get key() { return this._key; } set key(value) { this._key = asString(value); } // ** implementation // read parameters apply paging _getReadParams() { let params = { page: 1, per_page: 1e9 }; // paging on server if (this.pageOnServer && this.pageSize) { params.page = this.pageIndex + 1; params.per_page = this.pageSize; } return params; } _getWriteUrl(item) { let url = this._url + this._tbl; assert(this.key != null, 'write operations require keys'); return url + '/' + item[this.key]; } _jsonReviver(key, value) { if (typeof value === 'string' && _rxDate.test(value)) { value = value.indexOf('/Date(') == 0 // verbosejson ? new Date(parseInt(value.substr(6))) : new Date(value); } return value; } // ** overrides getItems() { return __awaiter(this, void 0, void 0, function* () { // cancel any pending requests if (this._pendingRequest) { //console.log('aborting pending request'); this._pendingRequest.abort(); } return new Promise(resolve => { let url = this._url + this._tbl; this._pendingRequest = httpRequest(url, { data: this._getReadParams(), success: (xhr) => __awaiter(this, void 0, void 0, function* () { let resp = JSON.parse(xhr.responseText, this._jsonReviver), arr = resp.data; this._totalItemCount = resp.total; resolve(arr); }), error: xhr => this._raiseError(xhr.responseText, false), complete: xhr => this._pendingRequest = null // no pending requests }); }); }); } addItem(item) { return new Promise(resolve => { let url = this._url + this._tbl; let newItem = {}; for (let k in item) { if (k != this.key) { newItem[k] = item[k]; } } httpRequest(url, { method: 'POST', requestHeaders: this.requestHeaders, data: newItem, success: xhr => { let newItem = JSON.parse(xhr.responseText, this._jsonReviver); item[this.key] = newItem[this.key]; this.refresh(); }, error: xhr => this._raiseError(xhr.responseText, true) }); }); } patchItem(item) { return new Promise((resolve) => { let url = this._getWriteUrl(item); httpRequest(url, { method: 'PUT', requestHeaders: this.requestHeaders, data: item, success: xhr => resolve(item), error: xhr => this._raiseError(xhr.responseText, true) }); }); } deleteItem(item) { return new Promise(resolve => { let url = this._getWriteUrl(item); httpRequest(url, { method: 'DELETE', requestHeaders: this.requestHeaders, success: xhr => resolve(item), error: xhr => this._raiseError(xhr.responseText, true) }); }); } }
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