@carto/airship-bridge/dist/vl/utils/conversion/histogram/index.js

Airship bridge to other libs (CARTO VL, CARTO.js)

import { toHex } from '../../color';
/**
 * Converts a numerical VL Histogram data to Airship's Histogram format.
 *
 * Has no support for `color` for now.
 *
 * @export
 * @param {VLNumericalHistogram} data Histogram data in VL format
 * @returns {any[]}
 */
export function numerical(data) {
    return data.value.map(function (d) { return ({
        end: d.x[1],
        start: d.x[0],
        value: d.y,
    }); });
}
export function date(data) {
    return data.value.map(function (d) { return ({
        end: new Date(d.x[1]),
        start: new Date(d.x[0]),
        value: d.y,
    }); });
}
/**
 * Converts a categorical VL Histogram to Airship's Histogram widget format.
 *
 * The second argument is used to provide custom colors for the widget.
 *
 * @export
 * @param {VLCategoricalHistogram} data Histogram data in VL format
 * @param {LegendEntry[]} [colors] VL Legend data, which maps values to colors.
 * @returns {any[]}
 */
export function categorical(data, colors) {
    return data.value.map(function (d) { return ({
        category: d.x,
        color: findColorForCategory(d.x, colors),
        end: undefined,
        start: undefined,
        value: d.y
    }); });
}
/**
 * Looks for a color in an array of VL Legend Data and converts it into a hex string.
 *
 * @export
 * @param {string} category
 * @param {LegendEntry[]} colors
 * @returns {(string | undefined)}
 */
export function findColorForCategory(category, colors) {
    if (!colors) {
        return undefined;
    }
    var color = colors.find(function (element) { return element.key === category; });
    if (color) {
        return toHex(color.value);
    }
    return undefined;
}
export default { numerical: numerical, categorical: categorical };