D-Net

package eu.dnetlib.data.claims.utils;

import com.google.gson.Gson;

import org.apache.log4j.Logger;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.StringReader;

import java.net.HttpURLConnection;

import java.net.URL;

import java.util.ArrayList;

import java.util.List;

public class CommunityUtils {

    private static String communityAPI;

    String name;

    List<String> managers = new ArrayList<String>();

    private final static Logger log = Logger.getLogger(CommunityUtils.class);

    public String getCommunityAPI() { return communityAPI; }

    public void setCommunityAPI(String communityAPI) { CommunityUtils.communityAPI = communityAPI; }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public List<String> getManagers() {

        return managers;

    }

    public void setManagers(List<String> managers) {

        this.managers = managers;

    }

    public  CommunityUtils getCommunityInfo(String community) {

        String url = communityAPI + community;

        URL obj = null;

        String responseStr = null;

        log.debug("Community info url is " + url);

        try {

            obj = new URL(url);

            HttpURLConnection con = (HttpURLConnection) obj.openConnection();

            log.debug("User info response code is: " + con.getResponseCode());

            if (con.getResponseCode() != 200) {

                return null;

            }

            BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));

            StringBuffer response = new StringBuffer();

            String inputLine;

            while ((inputLine = in.readLine()) != null) {

                response.append(inputLine).append("\n");

            }

            in.close();

            responseStr = response.toString();

        } catch (Exception e) {

            log.error("An error occured while trying to fetch user info ", e);

            return null;

        }

        return json2CommunityInfo(responseStr);

    }

    private CommunityUtils json2CommunityInfo(String json){

        log.debug("Try to create CommunityInfo class from json: "+json);

        if (json == null){

            return null;

        }

        BufferedReader br = new BufferedReader(new StringReader(json));

        //convert the json string back to object

        Gson gson = new Gson();

        CommunityUtils communityInfo = null;

        try {

            communityInfo = gson.fromJson(br, CommunityUtils.class);

        }catch(Exception e){

            log.debug("Error in parsing json response. Given json is : "+json, e);

            return null;

        }

        log.debug("Original response.........: "+communityInfo.toString());

        return communityInfo;

    }

    public Boolean isCommunityManager(String communityId, String userMail){

        CommunityUtils community = this.getCommunityInfo(communityId);

        return (community!=null && community.managers.indexOf(userMail) !=-1);

    }

}