app_vue2/services/dataProvider/dataProvider.ts

import {AnyJson, DataProviderArgs} from "~/types/interfaces";
import {DENORMALIZER_TYPE, HTTP_METHOD, QUERY_TYPE} from "~/types/enums";
import {providers} from "~/services/dataProvider/provider/_import";
import ConstructUrl from "~/services/connection/constructUrl";
import Connection from "~/services/connection/connection";
import Serializer from "~/services/serializer/serializer";
import {Context} from "@nuxt/types/app";
import ApiError from "~/services/utils/apiError";

class DataProvider{
  private ctx !: Context;
  private arguments!: DataProviderArgs;

  constructor() {
    this.arguments = {
      type: QUERY_TYPE.MODEL,
      progress:false
    }
  }

  initCtx(ctx:Context){
    Connection.initConnector(ctx.$axios)
    this.ctx = ctx
  }

  setArguments(args: DataProviderArgs){
    this.arguments = { ...this.arguments, ...args }
  }

  async invoke(args:DataProviderArgs): Promise<any>{

    try{
      this.setArguments(args)

      this.startLoading()

      const url = this.constructUrl()

      const response = await this.connection(url)

      const deserializeResponse = await this.deserialization(response)

      return await this.provide(deserializeResponse)
    }catch(error){
      throw new ApiError(500, error)
    }
  }

  startLoading(){
    if(this.arguments.progress){
      const $nuxt = window['$nuxt']
      $nuxt.$loading.start()
    }
  }

  constructUrl(): string{
    const constructUrl = new ConstructUrl();
    return constructUrl.invoke(this.arguments)
  }

  connection(url: string): Promise<any>{
    const connection = new Connection()
    return connection.invoke(HTTP_METHOD.GET, url, this.arguments)
  }

  provide(data: AnyJson): any{
    for(const provider of providers){
      if(provider.support(this.arguments)){
         return new provider(this.ctx, this.arguments).invoke(data);
      }
    }
  }

  deserialization(data: AnyJson): AnyJson{
    const serializer = new Serializer()
    return serializer.denormalize(data, DENORMALIZER_TYPE.HYDRA)
  }
}

export default DataProvider