flow like the river

VISUALIZACION/node_modules/parcel-bundler/lib/HMRServer.js

@@ -0,0 +1,172 @@
+'use strict';
+
+var _slicedToArray = function () { 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"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (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"); } }; }();
+
+function _asyncToGenerator(fn) { return function () { var gen = fn.apply(this, arguments); return new Promise(function (resolve, reject) { function step(key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { return Promise.resolve(value).then(function (value) { step("next", value); }, function (err) { step("throw", err); }); } } return step("next"); }); }; }
+
+const http = require('http');
+const https = require('https');
+const WebSocket = require('ws');
+const prettyError = require('./utils/prettyError');
+const generateCertificate = require('./utils/generateCertificate');
+const getCertificate = require('./utils/getCertificate');
+const logger = require('./Logger');
+
+class HMRServer {
+  start(options = {}) {
+    var _this = this;
+
+    return _asyncToGenerator(function* () {
+      yield new Promise((() => {
+        var _ref = _asyncToGenerator(function* (resolve) {
+          if (!options.https) {
+            _this.server = http.createServer();
+          } else if (typeof options.https === 'boolean') {
+            _this.server = https.createServer(generateCertificate(options));
+          } else {
+            _this.server = https.createServer((yield getCertificate(options.https)));
+          }
+
+          _this.wss = new WebSocket.Server({ server: _this.server });
+          _this.server.listen(options.hmrPort, resolve);
+        });
+
+        return function (_x) {
+          return _ref.apply(this, arguments);
+        };
+      })());
+
+      _this.wss.on('connection', function (ws) {
+        ws.onerror = _this.handleSocketError;
+        if (_this.unresolvedError) {
+          ws.send(JSON.stringify(_this.unresolvedError));
+        }
+      });
+
+      _this.wss.on('error', _this.handleSocketError);
+
+      return _this.wss._server.address().port;
+    })();
+  }
+
+  stop() {
+    this.wss.close();
+    this.server.close();
+  }
+
+  emitError(err) {
+    var _prettyError = prettyError(err);
+
+    let message = _prettyError.message,
+        stack = _prettyError.stack;
+
+    // store the most recent error so we can notify new connections
+    // and so we can broadcast when the error is resolved
+
+    this.unresolvedError = {
+      type: 'error',
+      error: {
+        message,
+        stack
+      }
+    };
+
+    this.broadcast(this.unresolvedError);
+  }
+
+  emitUpdate(assets) {
+    if (this.unresolvedError) {
+      this.unresolvedError = null;
+      this.broadcast({
+        type: 'error-resolved'
+      });
+    }
+
+    const containsHtmlAsset = assets.some(asset => asset.type === 'html');
+    if (containsHtmlAsset) {
+      this.broadcast({
+        type: 'reload'
+      });
+    } else {
+      this.broadcast({
+        type: 'update',
+        assets: assets.map(asset => {
+          let deps = {};
+          var _iteratorNormalCompletion = true;
+          var _didIteratorError = false;
+          var _iteratorError = undefined;
+
+          try {
+            for (var _iterator = asset.depAssets[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
+              let _ref2 = _step.value;
+
+              var _ref3 = _slicedToArray(_ref2, 2);
+
+              let dep = _ref3[0];
+              let depAsset = _ref3[1];
+
+              deps[dep.name] = depAsset.id;
+            }
+          } catch (err) {
+            _didIteratorError = true;
+            _iteratorError = err;
+          } finally {
+            try {
+              if (!_iteratorNormalCompletion && _iterator.return) {
+                _iterator.return();
+              }
+            } finally {
+              if (_didIteratorError) {
+                throw _iteratorError;
+              }
+            }
+          }
+
+          return {
+            id: asset.id,
+            generated: asset.generated,
+            deps: deps
+          };
+        })
+      });
+    }
+  }
+
+  handleSocketError(err) {
+    if (err.error.code === 'ECONNRESET') {
+      // This gets triggered on page refresh, ignore this
+      return;
+    }
+    logger.warn(err);
+  }
+
+  broadcast(msg) {
+    const json = JSON.stringify(msg);
+    var _iteratorNormalCompletion2 = true;
+    var _didIteratorError2 = false;
+    var _iteratorError2 = undefined;
+
+    try {
+      for (var _iterator2 = this.wss.clients[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {
+        let ws = _step2.value;
+
+        ws.send(json);
+      }
+    } catch (err) {
+      _didIteratorError2 = true;
+      _iteratorError2 = err;
+    } finally {
+      try {
+        if (!_iteratorNormalCompletion2 && _iterator2.return) {
+          _iterator2.return();
+        }
+      } finally {
+        if (_didIteratorError2) {
+          throw _iteratorError2;
+        }
+      }
+    }
+  }
+}
+
+module.exports = HMRServer;