A minimal tilelive source.

tilelive-minimal.js

"use strict";

/**
 * Note:
 *
 * setImmediate(callback, null, {});
 *
 * is shorthand for:
 * 
 * setImmediate(function() {
 *   return callback(null, {});
 * });
 *
 * (setImmediate() is used to preserve the contract that these are async calls;
 * if your output is the result of an async call, it's not necessary.)
 */

/**
 * A minimal tilelive source.
 */
module.exports = function(tilelive, options) {
  var Minimal = function(uri, callback) {
    return setImmediate(callback, null, this);
  };

  Minimal.prototype.getTile = function(z, x, y, callback) {
    return setImmediate(callback, null, JSON.stringify({
      hello: "world"
    }), {
      "Content-Type": "application/json"
    });
  };

  Minimal.prototype.getInfo = function(callback) {
    return setImmediate(callback, null, {});
  };

  Minimal.prototype.close = function(callback) {
    return callback && setImmediate(callback);
  };

  Minimal.registerProtocols = function(tilelive) {
    tilelive.protocols["minimal:"] = Minimal;
  };

  Minimal.registerProtocols(tilelive);

  return Minimal;
};