@alt-javascript/config initial commit.

Author: craig

.eslintrc.json

@@ -0,0 +1,27 @@
+{
+    "env": {
+        "browser": true,
+        "commonjs": true,
+        "es2021": true,
+        "mocha" : true
+    },
+    "plugins": [
+        "cucumber"
+    ],
+    "extends": [
+        "airbnb-base"
+    ],
+    "parserOptions": {
+        "ecmaVersion": 12
+
+    },
+    "parser": "babel-eslint",
+    "rules": {
+        "no-plusplus": ["error", { "allowForLoopAfterthoughts": true }],
+        "cucumber/async-then": ["error", { "All": false, "words": [ ] }],
+        "cucumber/expression-type": 2,
+        "cucumber/no-restricted-tags": [2, "wip", "broken", "foo"],
+        "cucumber/no-arrow-functions": 2,
+        "import/no-extraneous-dependencies": ["error", { "devDependencies": ["test/**/*.js", "features/**/*.js"] }]
+    }
+}

.gitignore

@@ -2,9 +2,6 @@
 logs
 *.log
 npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-lerna-debug.log*
 
 # Diagnostic reports (https://nodejs.org/api/report.html)
 report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
@@ -15,22 +12,13 @@ pids
 *.seed
 *.pid.lock
 
-# Directory for instrumented libs generated by jscoverage/JSCover
-lib-cov
-
 # Coverage directory used by tools like istanbul
 coverage
 *.lcov
 
 # nyc test coverage
 .nyc_output
 
-# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
-.grunt
-
-# Bower dependency directory (https://bower.io/)
-bower_components
-
 # node-waf configuration
 .lock-wscript
 
@@ -39,13 +27,6 @@ build/Release
 
 # Dependency directories
 node_modules/
-jspm_packages/
-
-# TypeScript v1 declaration files
-typings/
-
-# TypeScript cache
-*.tsbuildinfo
 
 # Optional npm cache directory
 .npm
@@ -64,41 +45,4 @@ typings/
 
 # Output of 'npm pack'
 *.tgz
-
-# Yarn Integrity file
-.yarn-integrity
-
-# dotenv environment variables file
-.env
-.env.test
-
-# parcel-bundler cache (https://parceljs.org/)
-.cache
-
-# Next.js build output
-.next
-
-# Nuxt.js build / generate output
-.nuxt
-dist
-
-# Gatsby files
-.cache/
-# Comment in the public line in if your project uses Gatsby and *not* Next.js
-# https://nextjs.org/blog/next-9-1#public-directory-support
-# public
-
-# vuepress build output
-.vuepress/dist
-
-# Serverless directories
-.serverless/
-
-# FuseBox cache
-.fusebox/
-
-# DynamoDB Local files
-.dynamodb/
-
-# TernJS port file
-.tern-port
+/.idea/

.npmignore

@@ -0,0 +1,7 @@
+/.nyc_output
+/config
+/coverage
+/features
+/test
+/node_modules
+.*

ConfigFactory.js

@@ -0,0 +1,20 @@
+const npmconfig = require('config');
+const ValueResolvingConfig = require('./ValueResolvingConfig');
+const DelegatingResolver = require('./DelegatingResolver');
+const PlaceHolderResolver = require('./PlaceHolderResolver');
+const PlaceHolderSelector = require('./PlaceHolderSelector');
+const JasyptDecryptor = require('./JasyptDecryptor');
+const PrefixSelector = require('./PrefixSelector');
+
+module.exports = class ConfigFactory {
+  static getConfig(config, resolver) {
+    const placeHolderResolver = new PlaceHolderResolver(new PlaceHolderSelector());
+    const jasyptDecryptor = new JasyptDecryptor(new PrefixSelector());
+    const delegatingResolver = new DelegatingResolver([placeHolderResolver, jasyptDecryptor]);
+    const valueResolvingConfig = new ValueResolvingConfig(config || npmconfig,
+      resolver || delegatingResolver);
+
+    placeHolderResolver.reference = valueResolvingConfig;
+    return valueResolvingConfig;
+  }
+};

DelegatingConfig.js

@@ -0,0 +1,10 @@
+module.exports = class DelegatingConfig {
+  constructor(config, path) {
+    this.config = config;
+    this.path = path;
+  }
+
+  has(path) {
+    return this.config.has(path);
+  }
+};

DelegatingResolver.js

@@ -0,0 +1,16 @@
+const Resolver = require('./Resolver');
+
+module.exports = class DelegatingResolver extends Resolver {
+  constructor(resolvers) {
+    super();
+    this.resolvers = resolvers;
+  }
+
+  resolve(config) {
+    let resolvedConfig = config;
+    for (let i = 0; i < this.resolvers.length; i++) {
+      resolvedConfig = this.resolvers[i].resolve(resolvedConfig);
+    }
+    return resolvedConfig;
+  }
+};

EphemeralConfig.js

@@ -0,0 +1,36 @@
+const _ = require('lodash');
+
+module.exports = class EphemeralConfig {
+  constructor(object, path) {
+    const self = this;
+    this.object = object;
+    this.path = path;
+    if (this.object) {
+      _.assignIn(self, this.object);
+    }
+  }
+
+  get(path, defaultValue) {
+    const pathSteps = path?.split('.') || [];
+    let root = this.object;
+    for (let i = 0; i < pathSteps.length && root !== null && root !== undefined; i++) {
+      root = root?.[pathSteps[i]];
+    }
+    if (root) {
+      return root;
+    }
+    if (defaultValue) {
+      return defaultValue;
+    }
+    throw new Error(`Config path ${path} returned no value.`);
+  }
+
+  has(path) {
+    const pathSteps = path?.split('.') || [];
+    let root = this.object;
+    for (let i = 0; i < pathSteps.length && root !== null && root !== undefined; i++) {
+      root = root?.[pathSteps[i]];
+    }
+    return root !== null && root !== undefined;
+  }
+};

History.md

@@ -0,0 +1,4 @@
+1.0.0 / 2021-07-12
+==================
+
+* Initial npm publish - @craigparra

JasyptDecryptor.js

@@ -0,0 +1,30 @@
+const Jasypt = require('jasypt');
+
+const Resolver = require('./Resolver');
+const SelectiveResolver = require('./SelectiveResolver');
+const PrefixSelector = require('./PrefixSelector');
+
+module.exports = class JasyptDecryptor extends SelectiveResolver {
+  constructor(selector, password) {
+    super(selector || (new PrefixSelector('enc.')));
+    this.jasypt = new Jasypt();
+    this.jasypt.setPassword(password || process.env.NODE_CONFIG_PASSPHRASE || 'changeit');
+  }
+
+  resolve(config) {
+    const self = this;
+    const resolvedConfig = Resolver.prototype.mapValuesDeep(config, (v) => {
+      if (self.selector.matches(v)) {
+        try {
+          const selectedValue = self.selector.resolveValue(v);
+          const decryptedValue = self.jasypt.decrypt(selectedValue);
+          return decryptedValue;
+        } catch (e) {
+          return v;
+        }
+      }
+      return v;
+    });
+    return resolvedConfig;
+  }
+};

PlaceHolderResolver.js

@@ -0,0 +1,39 @@
+const Resolver = require('./Resolver');
+const SelectiveResolver = require('./SelectiveResolver');
+const PlaceHolderSelector = require('./PlaceHolderSelector');
+
+module.exports = class PlaceHolderResolver extends SelectiveResolver {
+  constructor(selector, reference) {
+    super(selector || (new PlaceHolderSelector()));
+    this.reference = reference;
+  }
+
+  resolve(config) {
+    const self = this;
+    const resolvedConfig = Resolver.prototype.mapValuesDeep(config, (v) => {
+      if (self.selector.matches(v)) {
+        try {
+          let resolvedValue = '';
+          let remainder = v;
+          let placeholder;
+
+          while (resolvedValue === '' || (remainder.includes('${')
+                                && remainder.includes('}')
+                                && remainder.indexOf('${') < remainder.indexOf('}'))
+          ) {
+            resolvedValue = `${resolvedValue}${remainder.substring(0, remainder.indexOf('${'))}`;
+            placeholder = remainder.substring(remainder.indexOf('${') + 2, remainder.indexOf('}'));
+            resolvedValue = `${resolvedValue}${self.reference.get(placeholder)}`;
+            remainder = remainder.substring(remainder.indexOf('}') + 1);
+          }
+          resolvedValue = `${resolvedValue}${remainder}`;
+          return resolvedValue;
+        } catch (e) {
+          return v;
+        }
+      }
+      return v;
+    });
+    return resolvedConfig;
+  }
+};