@visactor/vmind/esm/atom/dataInsight/algorithms/majorityValue/index.js

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import { isArray, isNumber } from "@visactor/vutils";

import { InsightType } from "../../type";

import { ChartType } from "../../../../types";

const getMajorityInGroup = (dataset, measureId, seriesId, dimensionId, threshold = .85) => {
    const result = [], sum = dataset.reduce(((prev, cur) => {
        const dataValue = parseFloat(cur.dataItem[measureId]);
        return prev + (isNumber(dataValue) ? Math.abs(dataValue) : 0);
    }), 0);
    return sum - Number.EPSILON < 0 ? [] : (dataset.forEach((d => {
        const seriesName = d.dataItem[seriesId], dimensionName = d.dataItem[dimensionId], dataValue = parseFloat(d.dataItem[measureId]), ratio = (isNumber(dataValue) ? Math.abs(dataValue) : 0) / sum;
        ratio > threshold && result.push({
            type: InsightType.MajorityValue,
            data: [ d ],
            fieldId: measureId,
            value: d.dataItem[measureId],
            significant: ratio,
            seriesName: seriesName,
            info: {
                ratio: ratio,
                dimensionName: dimensionName
            }
        });
    })), result);
}, calcMajorityValue = (context, options) => {
    const result = [], {cell: cell, dimensionDataMap: dimensionDataMap, seriesDataMap: seriesDataMap} = context, {threshold: threshold} = options || {}, {y: celly, x: cellx, color: color} = cell, yField = isArray(celly) ? celly.flat() : [ celly ], xField = isArray(cellx) ? cellx[0] : cellx;
    let groupField;
    return groupField = isArray(cellx) && cellx.length > 1 ? cellx[1] : isArray(color) ? color[0] : color, 
    groupField && xField ? Object.keys(seriesDataMap).length <= 1 ? [] : (Object.keys(dimensionDataMap).forEach((dimension => {
        const dimensionDataset = dimensionDataMap[dimension], dimensionInsights = getMajorityInGroup(dimensionDataset, yField[0], groupField, xField, threshold);
        result.push(...dimensionInsights);
    })), result) : [];
};

export const LineChartMajorityValue = {
    name: "majorityValue",
    forceChartType: [ ChartType.BarChart, ChartType.AreaChart, ChartType.WaterFallChart ],
    insightType: InsightType.MajorityValue,
    algorithmFunction: calcMajorityValue
};
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