@visactor/vmind/esm/atom/chartGenerator/spec/transformers/sankey.js

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import { isValidDataTable } from "../../../../utils/dataTable";

import { color, discreteLegend } from "./common";

export const sankeyData = context => {
    const {dataTable: dataTable, cell: cell, spec: spec} = context, {source: source, target: target} = cell, linkData = isValidDataTable(dataTable) ? dataTable : [], nodeData = [ ...new Set([ ...linkData.map((item => item[source])), ...linkData.map((item => item[target])) ]) ].map((node => ({
        name: node
    })));
    return spec.data = {
        id: "data",
        values: [ {
            nodes: nodeData,
            links: linkData
        } ]
    }, {
        spec: spec
    };
};

export const sankeyField = context => {
    const {cell: cell, spec: spec} = context;
    return spec.sourceField = cell.source, spec.targetField = cell.target, spec.valueField = cell.value, 
    spec.categoryField = "name", spec.nodeKey = datum => datum.name, {
        spec: spec
    };
};

export const sankeyLink = context => {
    const {spec: spec} = context;
    return spec.link = {
        style: {},
        state: {
            hover: {},
            blur: {}
        }
    }, {
        spec: spec
    };
};

export const sankeyLabel = context => {
    const {spec: spec} = context;
    return spec.label = {
        visible: !0,
        style: {}
    }, {
        spec: spec
    };
};

export const pipelineSankey = [ sankeyData, color, sankeyField, sankeyLink, sankeyLabel, discreteLegend ];
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