@versatiles/server/dist/lib/layer.js

A server for VersaTiles

import { Container } from '@versatiles/container';
import { generateStyle } from './style.js';
export class Layer {
    #container;
    #serverOptions;
    #header;
    #metadata;
    #mime;
    #compression;
    constructor(source, serverOptions) {
        this.#serverOptions = serverOptions;
        this.#container = new Container(source, { tms: serverOptions?.tms ?? false });
    }
    async init() {
        if (this.#header)
            return;
        this.#header = await this.#container.getHeader();
        this.#metadata = await this.#container.getMetadata() ?? '{}';
        this.#mime = this.#header.tileMime;
        this.#compression = this.#header.tileCompression;
    }
    async getTileFunction() {
        await this.init();
        const container = this.#container;
        const mime = this.#mime;
        const compression = this.#compression;
        return async (z, x, y) => {
            const buffer = await container.getTile(z, x, y);
            if (!buffer)
                return null;
            return { buffer, mime, compression };
        };
    }
    async getStyle() {
        await this.init();
        if (!this.#metadata)
            throw Error();
        return generateStyle(this.#metadata, this.#serverOptions);
    }
    async getMetadata() {
        await this.init();
        return this.#metadata;
    }
}