/**
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* 加载WMS,拼接FILTER,LAYERS参数等
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*/
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import { WFS_URL } from '../../conf/Constants'
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import { lrtrim } from '../../utils/utils'
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function WfsHelper () {
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this.filters = []
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this.typeNames = []
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this.url = WFS_URL
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this.page = 1
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this.pageSize = 10
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this.params = {
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REQUEST: 'getfeature',
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OUTPUTFORMAT: 'application/json',
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maxFeatures: 10,
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version: '1.0.0'
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}
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this.setTypeName = (typeName) => {
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if (typeof typeName === 'string' || typeName instanceof String) {
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const comma = typeName.indexOf(',')
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if (comma >= 0) {
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const typeNameArr = typeName.split(',')
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for (let i = 0; i < typeNameArr.length; i++) {
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this.addTypeName(lrtrim(typeNameArr[i]))
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}
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}
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} else if (Array.isArray(typeName)) {
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this.typeNames = typeName
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}
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}
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this.setFilter = (filter) => {
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console.log(filter)
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if (typeof filter === 'string' || filter instanceof String) {
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const eq = filter.indexOf('=')
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const lk = filter.indexOf('like')
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if (eq >= 0) {
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const filterArr = filter.split('=')
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this.addEquals(lrtrim(filterArr[0]), lrtrim(filterArr[1]))
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}
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if (lk >= 0) {
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const filterArr = filter.split('like')
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this.addLike(lrtrim(filterArr[0]), lrtrim(filterArr[1]))
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}
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} else if (Array.isArray(filter)) {
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this.filters = filter
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}
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}
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this.clearFilter = () => {
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this.filters = []
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}
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this.addTypeName = (typeName) => {
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this.typeNames.push(typeName)
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}
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this.addEquals = (property, equals) => {
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// var filter = '<PropertyIsEqualTo><PropertyName>' + property + '</PropertyName><Literal>' + literal + '</Literal></PropertyIsEqualTo>'
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var filter = property + '=' + equals
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this.filters.push(filter)
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}
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this.addLike = (property, literal) => {
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// if (property && literal) {
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// var filter = '<PropertyIsLike><PropertyName>' + property + '</PropertyName><Literal>*' + literal + '*</Literal></PropertyIsLike>'
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// this.filters.push(filter)
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// }
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var filter = property + ' like \'%' + literal + '%\''
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this.filters.push(filter)
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}
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/**
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* 得到filter参数值
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* @returns {string|null}
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*/
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this.getFilterParams = () => {
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/* var head = '<Filter xmlns="http://www.opengis.net/ogc">'
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var end = '</Filter>'
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var filter = ''
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if (this.filters.length > 0) {
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for (var i = 0; i < this.filters.length; i++) {
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filter += this.filters[i]
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}
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// 当条件数 > 1时，需要用and标签包裹
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if (this.filters.length > 1) {
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return ('FILTER=' + head + '<And>' + filter + '</And>' + end)
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}
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return ('FILTER=' + head + filter + end)
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} */
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var filter = ''
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if (this.filters.length > 0) {
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filter = 'CQL_FILTER='
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for (var i = 0; i < this.filters.length; i++) {
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filter += this.filters[i]
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if (i !== this.filters.length - 1) {
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filter += ' AND '
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}
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}
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return filter
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}
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return filter
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}
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this.getUrlParams = () => {
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var params = ''
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for (var p in this.params) {
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params += (p + '=' + this.params[p] + '&')
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}
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// 拼接typename参数
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params += 'typename=' + this.typeNames.join(',')
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// 拼接filter参数
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var filterParam = this.getFilterParams()
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if (filterParam) {
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params += '&' + filterParam
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}
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// return encodeURI(params)
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return params
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}
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this.getUrl = () => {
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var url = this.url
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if (url.indexOf('?') > 0) {
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url += '&'
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} else {
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url += '?'
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}
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return url + this.getUrlParams()
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}
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this.setPage = (page) => {
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const startIndex = page * this.pageSize
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this.params.startIndex = startIndex
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this.page = page
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}
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this.setPageSize = (pageSize) => {
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this.pageSize = pageSize
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}
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this.setMaxFeatures = (maxFeatures) => {
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this.params.maxFeatures = maxFeatures
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}
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}
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export default WfsHelper
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