@patternplate/api/lib/create-subscription.js

Function.prototype.$asyncbind = function $asyncbind(self, catcher) {
  "use strict";

  if (!Function.prototype.$asyncbind) {
    Object.defineProperty(Function.prototype, "$asyncbind", {
      value: $asyncbind,
      enumerable: false,
      configurable: true,
      writable: true
    });
  }

  if (!$asyncbind.trampoline) {
    $asyncbind.trampoline = function trampoline(t, x, s, e, u) {
      return function b(q) {
        while (q) {
          if (q.then) {
            q = q.then(b, e);
            return u ? undefined : q;
          }

          try {
            if (q.pop) {
              if (q.length) return q.pop() ? x.call(t) : q;
              q = s;
            } else q = q.call(t);
          } catch (r) {
            return e(r);
          }
        }
      };
    };
  }

  if (!$asyncbind.LazyThenable) {
    $asyncbind.LazyThenable = function () {
      function isThenable(obj) {
        return obj && obj instanceof Object && typeof obj.then === "function";
      }

      function resolution(p, r, how) {
        try {
          var x = how ? how(r) : r;
          if (p === x) return p.reject(new TypeError("Promise resolution loop"));

          if (isThenable(x)) {
            x.then(function (y) {
              resolution(p, y);
            }, function (e) {
              p.reject(e);
            });
          } else {
            p.resolve(x);
          }
        } catch (ex) {
          p.reject(ex);
        }
      }

      function Chained() {}

      ;
      Chained.prototype = {
        resolve: _unchained,
        reject: _unchained,
        then: thenChain
      };

      function _unchained(v) {}

      function thenChain(res, rej) {
        this.resolve = res;
        this.reject = rej;
      }

      function then(res, rej) {
        var chain = new Chained();

        try {
          this._resolver(function (value) {
            return isThenable(value) ? value.then(res, rej) : resolution(chain, value, res);
          }, function (ex) {
            resolution(chain, ex, rej);
          });
        } catch (ex) {
          resolution(chain, ex, rej);
        }

        return chain;
      }

      function Thenable(resolver) {
        this._resolver = resolver;
        this.then = then;
      }

      ;

      Thenable.resolve = function (v) {
        return Thenable.isThenable(v) ? v : {
          then: function then(resolve) {
            return resolve(v);
          }
        };
      };

      Thenable.isThenable = isThenable;
      return Thenable;
    }();

    $asyncbind.EagerThenable = $asyncbind.Thenable = ($asyncbind.EagerThenableFactory = function (tick) {
      tick = tick || typeof process === "object" && process.nextTick || typeof setImmediate === "function" && setImmediate || function (f) {
        setTimeout(f, 0);
      };

      var soon = function () {
        var fq = [],
            fqStart = 0,
            bufferSize = 1024;

        function callQueue() {
          while (fq.length - fqStart) {
            try {
              fq[fqStart]();
            } catch (ex) {}

            fq[fqStart++] = undefined;

            if (fqStart === bufferSize) {
              fq.splice(0, bufferSize);
              fqStart = 0;
            }
          }
        }

        return function (fn) {
          fq.push(fn);
          if (fq.length - fqStart === 1) tick(callQueue);
        };
      }();

      function Zousan(func) {
        if (func) {
          var me = this;
          func(function (arg) {
            me.resolve(arg);
          }, function (arg) {
            me.reject(arg);
          });
        }
      }

      Zousan.prototype = {
        resolve: function resolve(value) {
          if (this.state !== undefined) return;
          if (value === this) return this.reject(new TypeError("Attempt to resolve promise with self"));
          var me = this;

          if (value && (typeof value === "function" || typeof value === "object")) {
            try {
              var first = 0;
              var then = value.then;

              if (typeof then === "function") {
                then.call(value, function (ra) {
                  if (!first++) {
                    me.resolve(ra);
                  }
                }, function (rr) {
                  if (!first++) {
                    me.reject(rr);
                  }
                });
                return;
              }
            } catch (e) {
              if (!first) this.reject(e);
              return;
            }
          }

          this.state = STATE_FULFILLED;
          this.v = value;
          if (me.c) soon(function () {
            for (var n = 0, l = me.c.length; n < l; n++) STATE_FULFILLED(me.c[n], value);
          });
        },
        reject: function reject(reason) {
          if (this.state !== undefined) return;
          this.state = STATE_REJECTED;
          this.v = reason;
          var clients = this.c;
          if (clients) soon(function () {
            for (var n = 0, l = clients.length; n < l; n++) STATE_REJECTED(clients[n], reason);
          });
        },
        then: function then(onF, onR) {
          var p = new Zousan();
          var client = {
            y: onF,
            n: onR,
            p: p
          };

          if (this.state === undefined) {
            if (this.c) this.c.push(client);else this.c = [client];
          } else {
            var s = this.state,
                a = this.v;
            soon(function () {
              s(client, a);
            });
          }

          return p;
        }
      };

      function STATE_FULFILLED(c, arg) {
        if (typeof c.y === "function") {
          try {
            var yret = c.y.call(undefined, arg);
            c.p.resolve(yret);
          } catch (err) {
            c.p.reject(err);
          }
        } else c.p.resolve(arg);
      }

      function STATE_REJECTED(c, reason) {
        if (typeof c.n === "function") {
          try {
            var yret = c.n.call(undefined, reason);
            c.p.resolve(yret);
          } catch (err) {
            c.p.reject(err);
          }
        } else c.p.reject(reason);
      }

      Zousan.resolve = function (val) {
        if (val && val instanceof Zousan) return val;
        var z = new Zousan();
        z.resolve(val);
        return z;
      };

      Zousan.reject = function (err) {
        if (err && err instanceof Zousan) return err;
        var z = new Zousan();
        z.reject(err);
        return z;
      };

      Zousan.version = "2.3.3-nodent";
      return Zousan;
    })();
  }

  var resolver = this;

  switch (catcher) {
    case true:
      return new $asyncbind.Thenable(boundThen);

    case 0:
      return new $asyncbind.LazyThenable(boundThen);

    case undefined:
      boundThen.then = boundThen;
      return boundThen;

    default:
      return function () {
        try {
          return resolver.apply(self, arguments);
        } catch (ex) {
          return catcher(ex);
        }
      };
  }

  function boundThen() {
    return resolver.apply(self, arguments);
  }
};

function _sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }

function _slicedToArray(arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return _sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }

const Path = require("path");

const ARSON = require("arson");

const _require = require("@patternplate/validate-config"),
      validate = _require.validate;

const WebSocket = require("ws");

const _require2 = require("@patternplate/load-config"),
      loadConfig = _require2.loadConfig;

const _require3 = require("./create-compiler"),
      createCompiler = _require3.createCompiler;

const debug = require("util").debuglog("PATTERNPLATE");

module.exports.createSubscription = function createSubscription(context) {
  const queues = context.queues,
        config = context.config,
        cwd = context.cwd,
        wss = context.wss,
        watcher = context.watcher;
  return handler => {
    debug("subscribing to webpack and fs events"); // Prevent client errors (frequently caused by Chrome disconnecting on reload)
    // from bubbling up and making the server fail, ref: https://github.com/websockets/ws/issues/1256

    wss.on("connection", ws => {
      ws.on("error", err => {
        if (err.errno === "ECONNRESET") {
          return;
        }

        console.error(err);
      });
    });
    const send = getSender(wss, handler);
    queues.client.subscribe(queue => {
      const _queue = _slicedToArray(queue, 1),
            message = _queue[0];

      send({
        type: message.type,
        payload: message.payload
      });
    });
    queues.client.subscribe(queue => {
      const _queue2 = _slicedToArray(queue, 1),
            message = _queue2[0];

      send({
        type: message.type,
        payload: message.payload
      });
    });
    let configError = false;
    watcher.subscribe(message => {
      if (message.type === "change" && message.payload.contentType === "config") {
        (() => new Promise(function ($return, $error) {
          var _ref, loadedConfig, filepath, _validate, _validate2, error, _ref2, _ref3, clientQueue, serverQueue;

          return loadConfig({
            cwd
          }).then(function ($await_3) {
            _ref = $await_3, loadedConfig = _ref.config, filepath = _ref.filepath;
            _validate = validate({
              target: config,
              name: filepath
            }), _validate2 = _slicedToArray(_validate, 1), error = _validate2[0];

            if (error) {
              configError = true;
              send({
                type: "error",
                payload: error
              });
              return $return();
            }

            if (configError) {
              console.log(`Resolved config error, applying ${filepath}`);
              configError = false;
            }

            Object.assign(config, loadedConfig);
            queues.client.stop();
            queues.server.stop();
            return Promise.all([createCompiler({
              config,
              cwd,
              target: "web"
            }), createCompiler({
              config,
              cwd,
              target: "node"
            })]).then(function ($await_4) {
              _ref2 = $await_4, _ref3 = _slicedToArray(_ref2, 2), clientQueue = _ref3[0], serverQueue = _ref3[1];
              queues.client = clientQueue;
              queues.server = serverQueue;
              return $return();
            }.$asyncbind(this, $error), $error);
          }.$asyncbind(this, $error), $error);
        }.$asyncbind(this)))().catch(err => {
          configError = true;
          send({
            type: "error",
            payload: err
          });
        });
      }

      send(message);
    });
  };
};

function getSender(wss, handler) {
  return message => {
    if (typeof handler === "function") {
      handler(message);
    }

    wss.clients.forEach(client => {
      if (client.readyState === WebSocket.OPEN) {
        client.send(ARSON.stringify(message));
      }
    });
  };
}
//# sourceMappingURL=create-subscription.js.map