react-native-chart-kit/dist/v2/react-native/charts/line/xScale.js

Beautiful React Native charts for dashboards, reports, and data-rich mobile apps.

import { createLinearScale, createPointScale, createTimeScale } from "../../../core/index";
import { getXKey, getXScaleType, unique } from "./utils";
export const buildLineChartXScale = ({ boxes, xValues }) => {
    const range = [
        boxes.plot.x,
        boxes.plot.x + boxes.plot.width
    ];
    const xScaleType = getXScaleType(xValues);
    if (xScaleType === "time") {
        const dates = xValues.filter((value) => value instanceof Date);
        const scale = createTimeScale({ values: dates, range });
        return (value) => (value instanceof Date ? scale.scale(value) : undefined);
    }
    if (xScaleType === "linear") {
        const numbers = xValues.filter((value) => typeof value === "number");
        const scale = createLinearScale({ values: numbers, range });
        return (value) => typeof value === "number" ? scale.scale(value) : undefined;
    }
    const domain = unique(xValues.map(getXKey));
    const scale = createPointScale({
        domain,
        range
    });
    return (value) => scale.scale(getXKey(value));
};