import {GraphRequestCallback, GraphError} from "./common"

export class ResponseHandler {

static init(res, err, resContents, callback:GraphRequestCallback):void {

if (res && res.ok) { // 2xx

callback(null, resContents, res)

} else { // not OK response

if (err == null && res != null)

if (resContents != null && resContents.error != null) // if error was passed to body

callback(ResponseHandler.buildGraphErrorFromResponseObject(resContents.error, res.status), null, res);

else

callback(ResponseHandler.defaultGraphError(res.status), null, res)

else // pass back error as first param

callback(ResponseHandler.ParseError(err), null, res)

}

}

/*

Example error for https://graph.microsoft.com/v1.0/me/events?$top=3&$search=foo

{

"error": {

"code": "SearchEvents",

"message": "The parameter $search is not currently supported on the Events resource.",

"innerError": {

"request-id": "b31c83fd-944c-4663-aa50-5d9ceb367e19",

"date": "2016-11-17T18:37:45"

}

}

}

*/

static ParseError(rawErr: Error):GraphError {

// if we couldn't find an error obj to parse, just return an object with a status code and date

if (!rawErr) {

return ResponseHandler.defaultGraphError(-1);

}

return ResponseHandler.buildGraphErrorFromErrorObject(rawErr);

}

static defaultGraphError(statusCode: number):GraphError {

return {

statusCode,

code: null,

message: null,

requestId: null,

date: new Date(),

body: null

}

}

static buildGraphErrorFromErrorObject(errObj: Error):GraphError {

const error: GraphError = ResponseHandler.defaultGraphError(-1);

error.body = errObj.toString();

error.message = errObj.message;

error.date = new Date();

return error;

}

static buildGraphErrorFromResponseObject(errObj: any, statusCode: number):GraphError {

return {

statusCode,

code: errObj.code,

message: errObj.message,

requestId: (errObj.innerError !== undefined) ? errObj.innerError["request-id"] : "",

date: (errObj.innerError !== undefined) ? new Date(errObj.innerError.date): new Date(),

body: errObj

};

}

}