client/src/app/shared/rest/rest.service.ts

   1 import { Injectable } from '@angular/core'
   2 import { HttpParams } from '@angular/common/http'
   3 import { SortMeta } from 'primeng/components/common/sortmeta'
   4 import { ComponentPagination } from './component-pagination.model'
   5
   6 import { RestPagination } from './rest-pagination'
   7
   8 @Injectable()
   9 export class RestService {
  10
  11   addRestGetParams (params: HttpParams, pagination?: RestPagination, sort?: SortMeta | string) {
  12     let newParams = params
  13
  14     if (pagination !== undefined) {
  15       newParams = newParams.set('start', pagination.start.toString())
  16                            .set('count', pagination.count.toString())
  17     }
  18
  19     if (sort !== undefined) {
  20       let sortString = ''
  21
  22       if (typeof sort === 'string') {
  23         sortString = sort
  24       } else {
  25         const sortPrefix = sort.order === 1 ? '' : '-'
  26         sortString = sortPrefix + sort.field
  27       }
  28
  29       newParams = newParams.set('sort', sortString)
  30     }
  31
  32     return newParams
  33   }
  34
  35   addObjectParams (params: HttpParams, object: { [ name: string ]: any }) {
  36     for (const name of Object.keys(object)) {
  37       const value = object[name]
  38       if (!value) continue
  39
  40       if (Array.isArray(value) && value.length !== 0) {
  41         for (const v of value) params = params.append(name, v)
  42       } else {
  43         params = params.append(name, value)
  44       }
  45     }
  46
  47     return params
  48   }
  49
  50   componentPaginationToRestPagination (componentPagination: ComponentPagination): RestPagination {
  51     const start: number = (componentPagination.currentPage - 1) * componentPagination.itemsPerPage
  52     const count: number = componentPagination.itemsPerPage
  53
  54     return { start, count }
  55   }
  56 }