private getYExtent()

in src/UXClient/Components/LineChart/LineChart.ts [401:443]
43 lines of code
18 McCabe index (conditional complexity)

    private getYExtent (aggValues, isEnvelope, aggKey = null) {   
        let extent;
        if (aggKey !== null && (this.chartComponentData.displayState[aggKey].yExtent !== null)) {
            return this.chartComponentData.displayState[aggKey].yExtent;
        }
        if (this.chartOptions.yExtent !== null) {
            return this.chartOptions.yExtent;
        } 
        if (isEnvelope) {
            var filteredValues = this.getFilteredValues(aggValues);
            var flatValuesList = [];
            filteredValues.forEach((d: any) => {
                if (this.chartComponentData.isPossibleEnvelope(d.aggregateKey, d.splitBy)) {
                    if (d.measures['min'] != undefined && d.measures['min'] != null) {
                        flatValuesList.push(d.measures['min']);
                    }
                    if (d.measures['avg'] != undefined && d.measures['avg'] != null) {
                        flatValuesList.push(d.measures['avg']);
                    }
                    if (d.measures['max'] != undefined && d.measures['max'] != null) {
                        flatValuesList.push(d.measures['max']);
                    }
                } else {
                    var visibleMeasure = this.chartComponentData.getVisibleMeasure(d.aggregateKey, d.splitBy);
                    if (d.measures[visibleMeasure] != undefined && d.measures[visibleMeasure] != null) {
                        flatValuesList.push(d.measures[visibleMeasure]);
                    }
                }
            });
            extent = d3.extent(flatValuesList);        
        } else {
            extent = d3.extent(this.getFilteredValues(aggValues), (d: any) => {
                var visibleMeasure = this.chartComponentData.getVisibleMeasure(d.aggregateKey, d.splitBy);
                if (d.measures[visibleMeasure] != undefined && d.measures[visibleMeasure] != null) {
                    return d.measures[visibleMeasure];
                }
                return null;
            });    
        }
        if (extent[0] == undefined || extent[1] == undefined)
            return [0,1]
        return extent;
    }