@deck.gl/carto/src/layers/schema/carto-properties-tile.ts

CARTO official integration with Deck.gl. Build geospatial applications using CARTO and Deck.gl.

// deck.gl
// SPDX-License-Identifier: MIT
// Copyright (c) vis.gl contributors

import {NumericProp, NumericPropKeyValueReader, PropertiesReader} from './carto-tile';

// Tile ========================================

export interface Tile {
  properties: Record<string, string>[];
  numericProps: Record<string, NumericProp>;
}

export class TileReader {
  static read(pbf, end?: number): Tile {
    return pbf.readFields(TileReader._readField, {properties: [], numericProps: {}}, end);
  }
  static _readField(this: void, tag: number, obj: Tile, pbf) {
    if (tag === 1) obj.properties.push(PropertiesReader.read(pbf, pbf.readVarint() + pbf.pos));
    else if (tag === 2) {
      const entry = NumericPropKeyValueReader.read(pbf, pbf.readVarint() + pbf.pos);
      obj.numericProps[entry.key] = entry.value;
    }
  }
}