+++ /dev/null
-import { SortMeta } from 'primeng/api'
-import { HttpParams } from '@angular/common/http'
-import { Injectable } from '@angular/core'
-import { ComponentPaginationLight } from './component-pagination.model'
-import { RestPagination } from './rest-pagination'
-
-interface QueryStringFilterPrefixes {
- [key: string]: {
- prefix: string
- handler?: (v: string) => string | number
- multiple?: boolean
- }
-}
-
-type ParseQueryStringFilterResult = {
- [key: string]: string | number | (string | number)[]
-}
-
-@Injectable()
-export class RestService {
-
- addRestGetParams (params: HttpParams, pagination?: RestPagination, sort?: SortMeta | string) {
- let newParams = params
-
- if (pagination !== undefined) {
- newParams = newParams.set('start', pagination.start.toString())
- .set('count', pagination.count.toString())
- }
-
- if (sort !== undefined) {
- let sortString = ''
-
- if (typeof sort === 'string') {
- sortString = sort
- } else {
- const sortPrefix = sort.order === 1 ? '' : '-'
- sortString = sortPrefix + sort.field
- }
-
- newParams = newParams.set('sort', sortString)
- }
-
- return newParams
- }
-
- addObjectParams (params: HttpParams, object: { [ name: string ]: any }) {
- for (const name of Object.keys(object)) {
- const value = object[name]
- if (value === undefined || value === null) continue
-
- if (Array.isArray(value) && value.length !== 0) {
- for (const v of value) params = params.append(name, v)
- } else {
- params = params.append(name, value)
- }
- }
-
- return params
- }
-
- componentPaginationToRestPagination (componentPagination: ComponentPaginationLight): RestPagination {
- const start: number = (componentPagination.currentPage - 1) * componentPagination.itemsPerPage
- const count: number = componentPagination.itemsPerPage
-
- return { start, count }
- }
-
- parseQueryStringFilter (q: string, prefixes: QueryStringFilterPrefixes): ParseQueryStringFilterResult {
- if (!q) return {}
-
- // Tokenize the strings using spaces
- const tokens = q.split(' ').filter(token => !!token)
-
- // Build prefix array
- const prefixeStrings = Object.values(prefixes)
- .map(p => p.prefix)
-
- // Search is the querystring minus defined filters
- const searchTokens = tokens.filter(t => {
- return prefixeStrings.every(prefixString => t.startsWith(prefixString) === false)
- })
-
- const additionalFilters: ParseQueryStringFilterResult = {}
-
- for (const prefixKey of Object.keys(prefixes)) {
- const prefixObj = prefixes[prefixKey]
- const prefix = prefixObj.prefix
-
- const matchedTokens = tokens.filter(t => t.startsWith(prefix))
- .map(t => t.slice(prefix.length)) // Keep the value filter
- .map(t => {
- if (prefixObj.handler) return prefixObj.handler(t)
-
- return t
- })
- .filter(t => !!t || t === 0)
-
- if (matchedTokens.length === 0) continue
-
- additionalFilters[prefixKey] = prefixObj.multiple === true
- ? matchedTokens
- : matchedTokens[0]
- }
-
- return {
- search: searchTokens.join(' ') || undefined,
-
- ...additionalFilters
- }
- }
-}