content abstraction

import { Injectable } from '@angular/core';
import { Http } from '@angular/http';

import 'rxjs/add/operator/map';
import {environment} from "../../environments/environment";

/** Encryption Stuff **/
var CryptoJS = require("crypto-js");
var hmacsha1 = require('hmacsha1');

@Injectable()
export class ContentService{
  private baseUrl: string = '';
  private formUrl: string = '';

  constructor(private http:Http) {
    this.baseUrl = environment.basePath;
    this.formUrl = environment.formPath;
  }

  public get(url, fullPath = false) {
    let fullURL: string = '';
    if(fullPath) {
      fullURL = url;
    } else {
      fullURL = this.baseUrl + url;
    }
    return this.http.get(fullURL).map((resp) => resp.json());
  }

  public gformPost(url:string, data) {
    let fullURL: string = this.formUrl + url;
    let d = new Date;
    let expiration = 3600; // 1 hour,
    let unixtime = d.getTime() / 1000 | 0;

    let expires = unixtime + expiration;
    let stringToSign = environment.gformApiKey + ":POST:" + url + ":" + expires;
    let signature = this.gformSignature(stringToSign);
    let completeUrl = fullURL+"?api_key="+environment.gformApiKey+"&signature="+signature+"&expires="+expires;
    return this.http.post(completeUrl, JSON.stringify(data))
        .map(res => res.json());
  }

  private gformSignature(toencrypt:string) {
    let hash = CryptoJS.HmacSHA1(toencrypt, environment.gformPrivateKey);
    let base64 = hash.toString(CryptoJS.enc.Base64);
    return encodeURIComponent(base64);
  }
}