@adaptabletools/adaptable/src/AdaptableState/Aggregations/weightedAverage.js

Powerful AG Grid extension which provides advanced, cutting-edge functionality to meet all DataGrid requirements

import { toNumber } from '../../Utilities/Extensions/NumberExtensions';
const getNumericValue = (input) => {
    if (typeof input === 'number') {
        return input;
    }
    const numericValue = toNumber(input);
    return isNaN(numericValue) ? null : numericValue;
};
export const weightedAverage = (params, columnId, weightColumnId) => {
    const { api: gridApi, rowNode: groupRowNode, values } = params;
    let weightedValueSum = 0;
    let totalWeight = 0;
    const childNodes = getMatchingChildNodes(groupRowNode, values.length);
    for (let i = 0; i < values.length; i++) {
        const value = values[i];
        if (value != null && typeof value === 'object') {
            weightedValueSum += value[columnId] ?? 0;
            totalWeight += value[weightColumnId] ?? 0;
        }
        else {
            const childNode = childNodes[i];
            if (!childNode) {
                continue;
            }
            const columnValue = getNumericValue(value);
            const weightValue = getNumericValue(gridApi.getCellValue({ colKey: weightColumnId, rowNode: childNode }));
            if (weightValue !== null) {
                totalWeight += weightValue;
            }
            if (columnValue !== null && weightValue !== null) {
                weightedValueSum += columnValue * weightValue;
            }
        }
    }
    const result = totalWeight !== 0 ? weightedValueSum / totalWeight : 0;
    return {
        toString: () => String(result),
        toNumber: () => result,
        [columnId]: weightedValueSum,
        [weightColumnId]: totalWeight,
    };
};
function getMatchingChildNodes(groupRowNode, valueCount) {
    if (groupRowNode.childrenAfterFilter?.length === valueCount) {
        return groupRowNode.childrenAfterFilter;
    }
    return groupRowNode.childrenAfterGroup ?? [];
}