From 29a50ea9cd2038e437bb4e264e33ba71373c1cd4 Mon Sep 17 00:00:00 2001
From: Jonathan Rainville <rainville.jonathan@gmail.com>
Date: Wed, 23 May 2018 08:40:09 -0400
Subject: [PATCH] refactor assertNodeConnection to use it in watch

---
 lib/constants.json                            |   3 +-
 lib/contracts/blockchain.js                   | 112 ++++----
 lib/core/engine.js                            |  19 +-
 lib/modules/ipfs/index.js                     |   2 +-
 ...kchain.js => blockchainProcessLauncher.js} |   6 +-
 package-lock.json                             | 246 +++++++++---------
 6 files changed, 204 insertions(+), 184 deletions(-)
 rename lib/processes/{blockchain.js => blockchainProcessLauncher.js} (90%)

diff --git a/lib/constants.json b/lib/constants.json
index c2c44c363..16e13e308 100644
--- a/lib/constants.json
+++ b/lib/constants.json
@@ -33,7 +33,6 @@
   "blockchain": {
     "blockchainReady": "blockchainReady",
     "init": "init",
-    "initiated": "initiated",
-    "engineReady": "engineReady"
+    "initiated": "initiated"
   }
 }
diff --git a/lib/contracts/blockchain.js b/lib/contracts/blockchain.js
index be76c2e7f..65af9d7d3 100644
--- a/lib/contracts/blockchain.js
+++ b/lib/contracts/blockchain.js
@@ -1,4 +1,5 @@
 const Web3 = require('web3');
+const async = require('async');
 const Provider = require('./provider.js');
 const request = require('request');
 
@@ -52,29 +53,37 @@ class Blockchain {
     const self = this;
 
     this.addCheck('Ethereum', function (cb) {
-      if (self.web3.currentProvider === undefined) {
-        return cb({name: "No Blockchain node found", status: 'off'});
-      }
+      async.waterfall([
+        function checkNodeConnection(next) {
+          self.assertNodeConnection(true, (err) => {
+            if (err) {
+              return next(null, {name: "No Blockchain node found", status: 'off'});
+            }
+            next();
+          });
+        },
+        function checkVersion(next) {
+          // TODO: web3_clientVersion method is currently not implemented in web3.js 1.0
+          self.web3._requestManager.send({method: 'web3_clientVersion', params: []}, (err, version) => {
+            if (err) {
+              return next(null, {name: "Ethereum node (version unknown)", status: 'on'});
+            }
+            if (version.indexOf("/") < 0) {
+              return next(null, {name: version, status: 'on'});
+            }
+            let nodeName = version.split("/")[0];
+            let versionNumber = version.split("/")[1].split("-")[0];
+            let name = nodeName + " " + versionNumber + " (Ethereum)";
 
-      self.web3.eth.getAccounts(function(err, _accounts) {
-        if (err) {
-          return cb({name: "No Blockchain node found", status: 'off'});
+            return next(null, {name: name, status: 'on'});
+          });
         }
-
-        // TODO: web3_clientVersion method is currently not implemented in web3.js 1.0
-        self.web3._requestManager.send({method: 'web3_clientVersion', params: []}, (err, version) => {
-          if (err) {
-            return cb({name: "Ethereum node (version unknown)", status: 'on'});
-          }
-          if (version.indexOf("/") < 0) {
-            return cb({name: version, status: 'on'});
-          }
-          let nodeName = version.split("/")[0];
-          let versionNumber = version.split("/")[1].split("-")[0];
-          let name = nodeName + " " + versionNumber + " (Ethereum)";
-
-          return cb({name: name, status: 'on'});
-        });
+      ], (err, statusObj) => {
+        if (err) {
+          self.logger.error(err);
+          return;
+        }
+        cb(statusObj);
       });
     });
   }
@@ -141,34 +150,49 @@ class Blockchain {
     }).on('error', cb);
   }
 
-  assertNodeConnection(cb) {
+  assertNodeConnection(noLogs, cb) {
+    if (typeof noLogs === 'function') {
+      cb = noLogs;
+      noLogs = false;
+    }
+    const NO_NODE_ERROR = Error("error connecting to blockchain node");
     const self = this;
-    if (!self.web3) {
-      return cb(Error("no web3 instance found"));
-    }
 
-    if (self.web3.currentProvider === undefined) {
-      self.logger.error(("Couldn't connect to an Ethereum node are you sure it's on?").red);
-      self.logger.info("make sure you have an Ethereum node or simulator running. e.g 'embark blockchain'".magenta);
-      return cb(Error("error connecting to blockchain node"));
-    }
-
-    // TODO: refactor this
-    request.get(this.web3Endpoint, function (err, _response, _body) {
-      if (err) {
+    async.waterfall([
+      function checkInstance(next) {
+        if (!self.web3) {
+          return next(Error("no web3 instance found"));
+        }
+        next();
+      },
+      function checkProvider(next) {
+        if (self.web3.currentProvider === undefined) {
+          return next(NO_NODE_ERROR);
+        }
+        next();
+      },
+      function pingEndpoint(next) {
+        request.get(self.web3Endpoint, function (err, _response, _body) {
+          if (err) {
+            return next(NO_NODE_ERROR);
+          }
+          next();
+        });
+      },
+      function checkAccounts(next) {
+        self.getAccounts(function(err, _accounts) {
+          if (err) {
+            return next(NO_NODE_ERROR);
+          }
+          return next();
+        });
+      }
+    ], function (err) {
+      if (!noLogs && err === NO_NODE_ERROR) {
         self.logger.error(("Couldn't connect to an Ethereum node are you sure it's on?").red);
         self.logger.info("make sure you have an Ethereum node or simulator running. e.g 'embark blockchain'".magenta);
-        return cb(Error("error connecting to blockchain node"));
       }
-
-      self.getAccounts(function(err, _accounts) {
-        if (err) {
-          self.logger.error(("Couldn't connect to an Ethereum node are you sure it's on?").red);
-          self.logger.info("make sure you have an Ethereum node or simulator running. e.g 'embark blockchain'".magenta);
-          return cb(Error("error connecting to blockchain node"));
-        }
-        return cb();
-      });
+      cb(err);
     });
   }
 
diff --git a/lib/core/engine.js b/lib/core/engine.js
index 0f4956b1c..750d6231e 100644
--- a/lib/core/engine.js
+++ b/lib/core/engine.js
@@ -13,8 +13,8 @@ const Pipeline = require('../pipeline/pipeline.js');
 const Watch = require('../pipeline/watch.js');
 const LibraryManager = require('../versions/library_manager.js');
 const CodeRunner = require('../coderunner/codeRunner.js');
-
-const BlockchainProcess = require('../processes/blockchain.js');
+const constants = require('../constants');
+const BlockchainProcess = require('../processes/blockchainProcessLauncher.js');
 
 class Engine {
   constructor(options) {
@@ -315,14 +315,13 @@ class Engine {
   }
 
   onReady(callback) {
-    //if (this.isReady) {
-    //  return callback();
-    //}
-    //this.events.once(constants.blockchain.engineReady, () => {
-    //  callback();
-    //});
-
-    setTimeout(function() { callback(); }, 2000);
+    if (this.isReady) {
+     return callback();
+    }
+    this.events.once(constants.blockchain.blockchainReady, () => {
+      this.isReady = true;
+     callback();
+    });
   }
 
   web3Service(options) {
diff --git a/lib/modules/ipfs/index.js b/lib/modules/ipfs/index.js
index 9f8507e25..bccd839cc 100644
--- a/lib/modules/ipfs/index.js
+++ b/lib/modules/ipfs/index.js
@@ -1,7 +1,7 @@
 let UploadIPFS = require('./upload.js');
 let utils = require('../../utils/utils.js');
 let fs = require('../../core/fs.js');
-let RunCode = require('../../core/runCode.js');
+let RunCode = require('../../coderunner/runCode');
 let IpfsApi = require('ipfs-api');
 
 class IPFS {
diff --git a/lib/processes/blockchain.js b/lib/processes/blockchainProcessLauncher.js
similarity index 90%
rename from lib/processes/blockchain.js
rename to lib/processes/blockchainProcessLauncher.js
index 3630a6b14..359a5a22a 100644
--- a/lib/processes/blockchain.js
+++ b/lib/processes/blockchainProcessLauncher.js
@@ -2,7 +2,7 @@ const ProcessLauncher = require('../process/processLauncher');
 const utils = require('../utils/utils.js');
 const constants = require('../constants');
 
-class Blockchain {
+class BlockchainProcessLauncher {
 
   constructor (options) {
     this.events = options.events;
@@ -14,7 +14,6 @@ class Blockchain {
 
   startBlockchainNode() {
     this.logger.info('Starting Blockchain node in another process'.cyan);
-    this.isRunningBlockchain = true;
 
     this.blockchainProcess = new ProcessLauncher({
       modulePath: utils.joinPath(__dirname, '../cmds/blockchain/blockchainProcess.js'),
@@ -40,9 +39,10 @@ class Blockchain {
 
     this.blockchainProcess.once('result', constants.blockchain.blockchainReady, () => {
       this.logger.info('Blockchain node is ready'.cyan);
+      this.events.emit(constants.blockchain.blockchainReady);
     });
   }
 
 }
 
-module.exports = Blockchain;
+module.exports = BlockchainProcessLauncher;
diff --git a/package-lock.json b/package-lock.json
index e3c7276c2..b22d565f7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6,7 +6,7 @@
   "dependencies": {
     "@sinonjs/formatio": {
       "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/@sinonjs/formatio/-/formatio-2.0.0.tgz",
+      "resolved": "http://registry.npmjs.org/@sinonjs/formatio/-/formatio-2.0.0.tgz",
       "integrity": "sha512-ls6CAMA6/5gG+O/IdsBcblvnd8qcO/l1TYoNeAzp3wcISOxlPXQEus0mLcdwazEkWjaBdaJ3TaxmNgCLWwvWzg==",
       "dev": true,
       "requires": {
@@ -65,7 +65,7 @@
     "abbrev": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
-      "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q=="
+      "integrity": "sha1-+PLIh60Qv2f2NPAFtph/7TF5qsg="
     },
     "abstract-leveldown": {
       "version": "2.6.3",
@@ -87,7 +87,7 @@
     "acorn": {
       "version": "5.5.3",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.5.3.tgz",
-      "integrity": "sha512-jd5MkIUlbbmb07nXH0DT3y7rDVtkzDi4XZOUVWAer8ajmF/DTSSbl5oNFyDOl/OXA33Bl79+ypHhl2pN20VeOQ=="
+      "integrity": "sha1-9HPdR+AnegjijpvsWu6wR1HwuMk="
     },
     "acorn-dynamic-import": {
       "version": "2.0.2",
@@ -224,7 +224,7 @@
     "argparse": {
       "version": "1.0.10",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
-      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
+      "integrity": "sha1-vNZ5HqWuCXJeF+WtmIE0zUCz2RE=",
       "requires": {
         "sprintf-js": "1.0.3"
       }
@@ -237,7 +237,7 @@
     "arr-flatten": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/arr-flatten/-/arr-flatten-1.1.0.tgz",
-      "integrity": "sha512-L3hKV5R/p5o81R7O02IGnwpDmkp6E982XhtbuwSe3O4qOtMMMtodicASA1Cny2U+aCXcNpml+m4dPsvsJ3jatg=="
+      "integrity": "sha1-NgSLv/TntH4TZkQxbJlmnqWukfE="
     },
     "arr-union": {
       "version": "3.1.0",
@@ -294,7 +294,7 @@
     "asn1.js": {
       "version": "4.10.1",
       "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-4.10.1.tgz",
-      "integrity": "sha512-p32cOF5q0Zqs9uBiONKYLm6BClCoBCM5O9JfeUSlnQLBTxYdTK+pW+nXflm8UkKd2UYlEbYz5qEi0JuZR9ckSw==",
+      "integrity": "sha1-ucK/WAXx5kqt7tbfOiv6+1pz9aA=",
       "requires": {
         "bn.js": "4.11.8",
         "inherits": "2.0.3",
@@ -417,7 +417,7 @@
     "babel-generator": {
       "version": "6.26.1",
       "resolved": "https://registry.npmjs.org/babel-generator/-/babel-generator-6.26.1.tgz",
-      "integrity": "sha512-HyfwY6ApZj7BYTcJURpM5tznulaBvyio7/0d4zFOeMPUmfxkCjHocCuoLa2SAGzBI8AREcH3eP3758F672DppA==",
+      "integrity": "sha1-GERAjTuPDTWkBOp6wYDwh6YBvZA=",
       "requires": {
         "babel-messages": "6.23.0",
         "babel-runtime": "6.26.0",
@@ -567,7 +567,7 @@
     "babel-loader": {
       "version": "7.1.4",
       "resolved": "https://registry.npmjs.org/babel-loader/-/babel-loader-7.1.4.tgz",
-      "integrity": "sha512-/hbyEvPzBJuGpk9o80R0ZyTej6heEOr59GoEUtn8qFKbnx4cJm9FWES6J/iv644sYgrtVw9JJQkjaLW/bqb5gw==",
+      "integrity": "sha1-40Y5OL1ObVXRwXTFSF1AahiO0BU=",
       "requires": {
         "find-cache-dir": "1.0.0",
         "loader-utils": "1.1.0",
@@ -1128,7 +1128,7 @@
     "babylon": {
       "version": "6.18.0",
       "resolved": "https://registry.npmjs.org/babylon/-/babylon-6.18.0.tgz",
-      "integrity": "sha512-q/UEjfGJ2Cm3oKV71DJz9d25TPnq5rhBVL2Q4fA5wcC3jcrdn7+SssEybFIxwAvvP+YCsCYNKughoF33GxgycQ=="
+      "integrity": "sha1-ry87iPpvXB5MY00aD46sT1WzleM="
     },
     "backoff": {
       "version": "2.5.0",
@@ -1146,7 +1146,7 @@
     "base": {
       "version": "0.11.2",
       "resolved": "https://registry.npmjs.org/base/-/base-0.11.2.tgz",
-      "integrity": "sha512-5T6P4xPgpp0YDFvSWwEZ4NoE3aM4QBQXDzmVbraCkFj8zHM+mba8SyqB5DbZWyR7mYHo6Y7BdQo3MoA4m0TeQg==",
+      "integrity": "sha1-e95c7RRbbVUakNuH+DxVi060io8=",
       "requires": {
         "cache-base": "1.0.1",
         "class-utils": "0.3.6",
@@ -1223,7 +1223,7 @@
     "big.js": {
       "version": "3.2.0",
       "resolved": "https://registry.npmjs.org/big.js/-/big.js-3.2.0.tgz",
-      "integrity": "sha512-+hN/Zh2D08Mx65pZ/4g5bsmNiZUuChDiQfTUQ7qJr4/kuopCr88xZsAXv6mBoZEsUI4OuGHlX59qE94K2mMW8Q=="
+      "integrity": "sha1-pfwpi4G54Nyi5FiCR4S2XFK6WI4="
     },
     "binary-extensions": {
       "version": "1.11.0",
@@ -1233,7 +1233,7 @@
     "bindings": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.3.0.tgz",
-      "integrity": "sha512-DpLh5EzMR2kzvX1KIlVC0VkC3iZtHKTgdtZ0a3pglBZdaQFjt5S9g9xd1lE+YvXyfd6mtCeRnrUfOLYiTMlNSw=="
+      "integrity": "sha1-s0b27PapX1qBXFg5/HzbIlAvHtc="
     },
     "bip39": {
       "version": "2.5.0",
@@ -1290,7 +1290,7 @@
     "bn.js": {
       "version": "4.11.8",
       "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.8.tgz",
-      "integrity": "sha512-ItfYfPLkWHUjckQCk8xC+LwxgK8NYcXywGigJgSwOP8Y2iyWT4f2vsZnoOXTTbo+o5yXmIUJ4gn5538SO5S3gA=="
+      "integrity": "sha1-LN4J617jQfSEdGuwMJsyU7GxRC8="
     },
     "body-parser": {
       "version": "1.18.3",
@@ -1312,7 +1312,7 @@
     "brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
-      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+      "integrity": "sha1-PH/L9SnYcibz0vUrlm/1Jx60Qd0=",
       "requires": {
         "balanced-match": "1.0.0",
         "concat-map": "0.0.1"
@@ -1542,7 +1542,7 @@
     "cache-base": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/cache-base/-/cache-base-1.0.1.tgz",
-      "integrity": "sha512-AKcdTnFSWATd5/GCPRxr2ChwIJ85CeyrEyjRHlKxQ56d4XJMGym0uAiKn0xbLOGOl3+yRpOTi484dVCEc5AUzQ==",
+      "integrity": "sha1-Cn9GQWgxyLZi7jb+TnxZ129marI=",
       "requires": {
         "collection-visit": "1.0.0",
         "component-emitter": "1.2.1",
@@ -1681,7 +1681,7 @@
     "cids": {
       "version": "0.5.3",
       "resolved": "https://registry.npmjs.org/cids/-/cids-0.5.3.tgz",
-      "integrity": "sha512-ujWbNP8SeLKg5KmGrxYZM4c+ttd+wwvegrdtgmbi2KNFUbQN4pqsGZaGQE3rhjayXTbKFq36bYDbKhsnD0eMsg==",
+      "integrity": "sha1-miW2l+t2+vgHr87DXEq5Nu370KQ=",
       "requires": {
         "multibase": "0.4.0",
         "multicodec": "0.2.6",
@@ -1691,7 +1691,7 @@
     "cipher-base": {
       "version": "1.0.4",
       "resolved": "https://registry.npmjs.org/cipher-base/-/cipher-base-1.0.4.tgz",
-      "integrity": "sha512-Kkht5ye6ZGmwv40uUDZztayT2ThLQGfnj/T71N/XzeZeo3nf8foyW7zGTsPYkEya3m5f3cAypH+qe7YOrM1U2Q==",
+      "integrity": "sha1-h2Dk7MJy9MNjUy+SbYdKriwTl94=",
       "requires": {
         "inherits": "2.0.3",
         "safe-buffer": "5.1.2"
@@ -1706,7 +1706,7 @@
     "clap": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/clap/-/clap-1.2.3.tgz",
-      "integrity": "sha512-4CoL/A3hf90V3VIEjeuhSvlGFEHKzOz+Wfc2IVZc+FaUgU0ZQafJTP49fvnULipOPcAfqhyI2duwQyns6xqjYA==",
+      "integrity": "sha1-TzZ0WzIAhJJVf0ZBLWbVDLmbzlE=",
       "requires": {
         "chalk": "1.1.3"
       }
@@ -1714,7 +1714,7 @@
     "class-utils": {
       "version": "0.3.6",
       "resolved": "https://registry.npmjs.org/class-utils/-/class-utils-0.3.6.tgz",
-      "integrity": "sha512-qOhPa/Fj7s6TY8H8esGu5QNpMMQxz79h+urzrNYN6mn+9BnxlDGf5QZ+XeCDsxSjPqsSR56XOZOJmpeurnLMeg==",
+      "integrity": "sha1-+TNprouafOAv1B+q0MqDAzGQxGM=",
       "requires": {
         "arr-union": "3.1.0",
         "define-property": "0.2.5",
@@ -1824,7 +1824,7 @@
     "color-convert": {
       "version": "1.9.1",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.1.tgz",
-      "integrity": "sha512-mjGanIiwQJskCC18rPR6OmrZ6fm2Lc7PeGFYwCmy5J34wC6F1PzdGL6xeMfmgicfYcNLGuVFA3WzXtIDCQSZxQ==",
+      "integrity": "sha1-wSYRB66y8pTr/+ye2eytUppgl+0=",
       "requires": {
         "color-name": "1.1.3"
       }
@@ -2019,7 +2019,7 @@
     "crypto-browserify": {
       "version": "3.12.0",
       "resolved": "https://registry.npmjs.org/crypto-browserify/-/crypto-browserify-3.12.0.tgz",
-      "integrity": "sha512-fz4spIh+znjO2VjL+IdhEpRJ3YN6sMzITSBijk6FK2UvTqruSQW+/cCZTSNsMiZNvUeq0CqurF+dAbyiGOY6Wg==",
+      "integrity": "sha1-OWz58xN/A+S45TLFj2mCVOAPgOw=",
       "requires": {
         "browserify-cipher": "1.0.1",
         "browserify-sign": "4.0.4",
@@ -2183,7 +2183,7 @@
     "debug": {
       "version": "2.6.9",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
-      "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+      "integrity": "sha1-XRKFFd8TT/Mn6QpMk/Tgd6U2NB8=",
       "requires": {
         "ms": "2.0.0"
       }
@@ -2329,7 +2329,7 @@
     "define-property": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/define-property/-/define-property-2.0.2.tgz",
-      "integrity": "sha512-jwK2UV4cnPpbcG7+VRARKTZPUWowwXA8bzH5NP6ud0oeAxyYPuGZUAC7hMugpCdz4BeSZl2Dl9k66CHJ/46ZYQ==",
+      "integrity": "sha1-1Flono1lS6d+AqgX+HENcCyxbp0=",
       "requires": {
         "is-descriptor": "1.0.2",
         "isobject": "3.0.1"
@@ -2563,7 +2563,7 @@
     "end-of-stream": {
       "version": "1.4.1",
       "resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.1.tgz",
-      "integrity": "sha512-1MkrZNvWTKCaigbn+W15elq2BB/L22nqrSY5DKlo3X6+vclJm8Bb5djXJBmEX6fS3+zCh/F4VBK5Z2KxJt4s2Q==",
+      "integrity": "sha1-7SljTRm6ukY7bOa4CjchPqtx7EM=",
       "requires": {
         "once": "1.4.0"
       }
@@ -2695,7 +2695,7 @@
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