function updateRankingColumns()

in packages/tablesorter-powerbi/src/TableSorterVisual.ts [556:590]

• 31 lines of code
• 9 McCabe index (conditional complexity)

function updateRankingColumns(rankingInfo: IRankingInfo, data: ITableSorterRow[]) {
    "use strict";
    if (rankingInfo) {
        // const data = this._data.data;
        const ranks = rankingInfo.values.slice(0).reverse();
        const runningRankTotal = {};
        const rankCounts = {};
        data.forEach(result => {
            const itemRank = result[rankingInfo.column.displayName];
            ranks.forEach(rank => {
                if (LOWER_NUMBER_HIGHER_VALUE ? (itemRank <= rank) : (itemRank >= rank)) {
                    rankCounts[rank] = (rankCounts[rank] || 0) + 1;
                }
            });
        });
        const precision = Math.max((data.length + "").length - 2, 0);
        data.forEach((result, j) => {
            // The bucket that this item belongs to
            const itemRank = result[rankingInfo.column.displayName];

            // Go through each bucket in the entire dataset
            for (const rank of ranks) {
                const positionInBucket = runningRankTotal[rank] = runningRankTotal[rank] || 0;
                const propName = `GENERATED_RANK_LEVEL_${rank}`;
                let value = 0;
                if (LOWER_NUMBER_HIGHER_VALUE ? (itemRank <= rank) : (itemRank >= rank)) {
                    const position = ((rankCounts[rank] - runningRankTotal[rank]) / rankCounts[rank]) * 100;
                    value = parseFloat(position.toFixed(precision));
                    runningRankTotal[rank] = positionInBucket + 1;
                }
                result[propName] = value;
            }
        });
    }
}