diffusion/src/node_modules/features/time-series/time-series-impl.js

Diffusion JavaScript client

var _implements = require('util/interface')._implements;
var TimeSeries = require('../../../features/timeseries');

var RangeQueryImpl = require('features/time-series/range-query-impl');
var DataTypes = require('data/datatypes');
var Services = require('services/services');

var Emitter = require('events/emitter');
var Result = require('events/result');

var requireNonNull = require('util/require-non-null');

module.exports = _implements(TimeSeries, function TimeSeriesImpl(internal) {
    var locator = internal.getServiceLocator();
    var rangeQuery = RangeQueryImpl.createDefault(locator.obtain(Services.RANGE_QUERY));

    var appendService = locator.obtain(Services.TIME_SERIES_APPEND);
    var editService = locator.obtain(Services.TIME_SERIES_EDIT);

    this.rangeQuery = function() {
        return rangeQuery;
    };

    this.edit = function(path, sequence, value, valueType) {
        var emitter = new Emitter();
        var result = new Result(emitter);

        var datatype;

        try {
            if (valueType) {
                datatype = DataTypes.getChecked(valueType);
            } else {
                datatype = DataTypes.getByValue(value);
            }

            requireNonNull(path, "Path");
            requireNonNull(value, "Value");
            requireNonNull(sequence, "Sequence");
            requireNonNull(datatype, "Data type");
        } catch (e) {
            emitter.error(e);
            return result;
        }

        editService.send({
            path : path,
            sequence : sequence,
            dataType : datatype,
            value : datatype.writeValue(value)
        }, function(err, metadata) {
            if (err) {
                emitter.error(err);
            } else {
                emitter.emit('complete', metadata);
            }
        });

        return result;
    };

    this.append = function(path, value, valueType) {
        var emitter = new Emitter();
        var result = new Result(emitter);

        var datatype;

        try {
            if (valueType) {
                datatype = DataTypes.getChecked(valueType);
            } else {
                datatype = DataTypes.getByValue(value);
            }

            requireNonNull(path, "Path");
            requireNonNull(value, "Value");
            requireNonNull(datatype, "Data type");
        } catch (e) {
            emitter.error(e);
            return result;
        }

        appendService.send({
            path : path,
            value : datatype.writeValue(value),
            dataType : datatype
        }, function(err, metadata) {
            if (err) {
                emitter.error(err);
            } else {
                emitter.emit('complete', metadata);
            }
        });

        return result;
    };
});