Commit that introduces a new Remote Operation that fetches users' quota

package com.owncloud.android.lib.resources.users;

import android.util.Base64;

import android.util.Log;

import com.owncloud.android.lib.common.OwnCloudBasicCredentials;

import com.owncloud.android.lib.common.OwnCloudClient;

import com.owncloud.android.lib.common.OwnCloudCredentials;

import com.owncloud.android.lib.common.operations.RemoteOperation;

import com.owncloud.android.lib.common.operations.RemoteOperationResult;

import com.owncloud.android.lib.common.utils.Log_OC;

import org.apache.commons.httpclient.Header;

import org.apache.commons.httpclient.HttpClient;

import org.apache.commons.httpclient.NameValuePair;

import org.apache.commons.httpclient.methods.GetMethod;

import org.apache.http.HttpStatus;

import org.json.JSONObject;

import java.net.URLEncoder;

import java.nio.charset.StandardCharsets;

import java.util.ArrayList;

/**

 * Created by marcello on 11/11/14.

 */

public class GetRemoteUserQuotaOperation extends RemoteOperation {

    private static final String TAG = GetRemoteUserNameOperation.class.getSimpleName();

    private static final String NODE_OCS = "ocs";

    private static final String NODE_DATA = "data";

    private static final String NODE_QUOTA = "quota";

    private static final String NODE_QUOTA_FREE = "free";

    private static final String NODE_QUOTA_USED = "used";

    private static final String NODE_QUOTA_TOTAL = "total";

    private static final String NODE_QUOTA_RELATIVE = "relative";

    // OCS Route

    private static final String OCS_ROUTE ="/ocs/v1.php/cloud/users/";

    @Override

    protected RemoteOperationResult run(OwnCloudClient client) {

        RemoteOperationResult result = null;

        int status = -1;

        GetMethod get = null;

        //Get the user

        try {

            OwnCloudBasicCredentials credentials = (OwnCloudBasicCredentials) client.getCredentials();

            String url = client.getBaseUri() + OCS_ROUTE + credentials.getUsername();

            get = new GetMethod(url);

            get.addRequestHeader(createAuthenticationHeader(credentials));

            get.setQueryString(new NameValuePair[]{new NameValuePair("format","json")});

            status = client.executeMethod(get);

            if(isSuccess(status)) {

                String response = get.getResponseBodyAsString();

                // Parse the response

                JSONObject respJSON = new JSONObject(response);

                JSONObject respOCS = respJSON.getJSONObject(NODE_OCS);

                JSONObject respData = respOCS.getJSONObject(NODE_DATA);

                JSONObject quota    = respData.getJSONObject(NODE_QUOTA);

                final Long quotaFree = quota.getLong(NODE_QUOTA_FREE);

                final Long quotaUsed = quota.getLong(NODE_QUOTA_USED);

                final Long quotaTotal = quota.getLong(NODE_QUOTA_TOTAL);

                final Double quotaRelative = quota.getDouble(NODE_QUOTA_RELATIVE);

                // Result

                result = new RemoteOperationResult(true, status, get.getResponseHeaders());

                //Quota data in data collection

                ArrayList<Object> data = new ArrayList<Object>();

                data.add(quotaFree);

                data.add(quotaUsed);

                data.add(quotaTotal);

                data.add(quotaRelative);

                result.setData(data);

            } else {

                result = new RemoteOperationResult(false, status, get.getResponseHeaders());

                String response = get.getResponseBodyAsString();

                Log_OC.e(TAG, "Failed response while getting user quota information ");

                if (response != null) {

                    Log_OC.e(TAG, "*** status code: " + status + " ; response message: " + response);

                } else {

                    Log_OC.e(TAG, "*** status code: " + status);

                }

            }

        } catch (Exception e) {

            result = new RemoteOperationResult(e);

            Log_OC.e(TAG, "Exception while getting OC user information", e);

        } finally {

            get.releaseConnection();

        }

        return result;

    }

    private boolean isSuccess(int status) {

        return (status == HttpStatus.SC_OK);

    }

    private Header createAuthenticationHeader(OwnCloudCredentials credentials){

        Header h = new Header();

        h.setName("Authorization");

        String authString = credentials.getUsername()+":"+credentials.getAuthToken();

        String encodedString = Base64.encodeToString(authString.getBytes(), Base64.NO_WRAP);

        h.setValue("Basic "+encodedString);

        return h;

    }

}