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import { Http, RequestOptionsArgs, URLSearchParams, Response } from '@angular/http'
import { ServerDataSource } from 'ng2-smart-table'
export class RestDataSource extends ServerDataSource {
constructor (http: Http, endpoint: string) {
const options = {
endPoint: endpoint,
sortFieldKey: 'sort',
dataKey: 'data'
}
super(http, options)
}
protected extractTotalFromResponse (res: Response) {
const rawData = res.json()
return rawData ? parseInt(rawData.total, 10) : 0
}
protected addSortRequestOptions (requestOptions: RequestOptionsArgs) {
const searchParams = requestOptions.params as URLSearchParams
if (this.sortConf) {
this.sortConf.forEach((fieldConf) => {
const sortPrefix = fieldConf.direction === 'desc' ? '-' : ''
searchParams.set(this.conf.sortFieldKey, sortPrefix + fieldConf.field)
})
}
return requestOptions
}
protected addPagerRequestOptions (requestOptions: RequestOptionsArgs) {
const searchParams = requestOptions.params as URLSearchParams
if (this.pagingConf && this.pagingConf['page'] && this.pagingConf['perPage']) {
const perPage = this.pagingConf['perPage']
const page = this.pagingConf['page']
const start = (page - 1) * perPage
const count = perPage
searchParams.set('start', start.toString())
searchParams.set('count', count.toString())
}
return requestOptions
}
}
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