utils.go

//
//  tank
//
//  Import and Playlist Daemon for autoradio project
//
//
//  Copyright (C) 2017-2018 Christian Pointner <equinox@helsinki.at>
//
//  This file is part of tank.
//
//  tank is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  any later version.
//
//  tank is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with tank. If not, see <http://www.gnu.org/licenses/>.
//

package v1

import (
	"encoding/json"
	"net/http"
	"strconv"

	"gitlab.servus.at/autoradio/tank/importer"
	"gitlab.servus.at/autoradio/tank/store"
)

func idFromString(s string) (uint64, error) {
	return strconv.ParseUint(s, 10, 64)
}

func sendError(w http.ResponseWriter, err error) {
	code := http.StatusInternalServerError
	response := ErrorResponse{Error: err.Error()}
	switch err.(type) {
	case *store.ErrFileInUse:
		code = http.StatusConflict
		response.Details = err
	default:
		switch err {
		case store.ErrNotImplemented:
			code = http.StatusNotImplemented
		case store.ErrNotFound:
			code = http.StatusNotFound

		case importer.ErrNotImplemented:
			code = http.StatusNotImplemented
		case importer.ErrNotFound:
			code = http.StatusNotFound
		case importer.ErrSourceNotSupported:
			code = http.StatusBadRequest
		case importer.ErrFileNotNew:
			code = http.StatusConflict
		case importer.ErrTooManyJobs:
			code = http.StatusTooManyRequests
		case importer.ErrAlreadyCanceled:
			code = http.StatusConflict
		}
	}
	sendWebResponse(w, code, response)
}

func sendWebResponse(w http.ResponseWriter, status int, respdata interface{}) {
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(status)
	json.NewEncoder(w).Encode(respdata) // TODO: Error Handling?
}