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

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import { getFieldByDataType } from "../../../../utils/field";

import { LINEAR_COLOR_THEMES } from "../constants";

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

import { DataType } from "../../../../types/base";

import { axis, seriesField } from "./cartesian";

export const colorLine = context => {
    const {colors: colors, spec: spec, chartTheme: chartTheme} = context;
    return chartTheme || (colors && colors.length > 0 ? spec.color = colors : (spec.color = LINEAR_COLOR_THEMES.map((c => ({
        gradient: "linear",
        x0: 0,
        y0: .5,
        x1: 1,
        y1: .5,
        stops: [ {
            offset: 0,
            color: c[0]
        }, {
            offset: 1,
            color: c[1]
        } ]
    }))), spec.point = {
        style: {}
    })), {
        spec: spec
    };
};

export const cartesianLine = context => {
    const {cell: cell, spec: spec, fieldInfo: fieldInfo} = context, cellNew = Object.assign({}, cell);
    if (spec.xField = cell.x, spec.yField = cell.y, cell.color) spec.seriesField = cell.color; else {
        const remainedFields = fieldInfo.filter((({fieldName: fieldName}) => !spec.xField.includes(fieldName) && spec.yField !== fieldName)), colorField = getFieldByDataType(remainedFields, [ DataType.STRING, DataType.DATE ]);
        colorField && (spec.seriesField = colorField.fieldName, cellNew.color = colorField.fieldName);
    }
    return {
        spec: spec,
        cell: cellNew
    };
};

export const displayConfLine = context => {
    const {spec: spec, chartTheme: chartTheme} = context;
    return chartTheme || (spec.line = {
        style: {}
    }), {
        spec: spec
    };
};

export const pipelineLine = [ data, colorLine, cartesianLine, seriesField, axis, discreteLegend, displayConfLine ];
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