Updated libraries and linters

Linters conform to ShakaCode internal project standards.

Author: justin808

client/.eslintrc

@@ -6,13 +6,43 @@ extends: eslint-config-airbnb
 plugins:
   - react
 
+globals:
+  __DEBUG_SERVER_ERRORS__: true
+  __SERVER_ERRORS__: true
+
 env:
   browser: true
   node: true
   mocha: true
 
 rules:
+  ### Variables
+  no-undef: 2
+  no-unused-vars: [2, { vars: all, args: none }]
+
+  ### Stylistic issues
   indent: [1, 2, { SwitchCase: 1, VariableDeclarator: 2 }]
-  react/sort-comp: 0
-  react/jsx-quotes: 1
-  id-length: [2, {"exceptions": ["e", "i", "_"]}]
+  id-length: [1, { min: 2, exceptions: [_, e, i, k, v] }]
+
+  ### React
+  jsx-quotes: [1, prefer-double]
+  react/display-name: 0
+  react/jsx-boolean-value: [1, always]
+  react/jsx-curly-spacing: [1, never]
+  react/jsx-no-duplicate-props: [2, { ignoreCase: true }]
+  react/jsx-no-undef: 2
+  react/jsx-sort-prop-types: 0
+  react/jsx-sort-props: 0
+  react/jsx-uses-react: 2
+  react/jsx-uses-vars: 2
+  react/no-danger: 0
+  react/no-did-mount-set-state: 1
+  react/no-did-update-set-state: 0
+  react/no-multi-comp: 2
+  react/no-unknown-property: 2
+  react/prop-types: 1
+  react/react-in-jsx-scope: 2
+  react/require-extension: [1, { extensions: [.js, .jsx] }]
+  react/self-closing-comp: 2
+  react/sort-comp: 0                                                            # Should be 1. `statics` should be on top.
+  react/wrap-multilines: 2

client/.jscsrc

@@ -1,7 +1,18 @@
 {
   "preset": "airbnb",
-  "fileExtensions": [".js", ".jsx"],
-  "excludeFiles": ["build/**", "node_modules/**"],
-
-  "validateQuoteMarks": null                        // Issue with JSX quotemarks: https://github.com/jscs-dev/babel-jscs/issues/12
+  "fileExtensions": [
+    ".js",
+    ".jsx"
+  ],
+  "excludeFiles": [
+    "assets/**",
+    "build/**",
+    "node_modules/**"
+  ],
+  "esprima": "babel-jscs",
+  "validateQuoteMarks": {
+    "mark": "'",
+    "escape": true,
+    "ignoreJSX": true
+  }
 }

client/app/components/CommentBox.jsx

@@ -39,7 +39,7 @@ class CommentBox extends React.Component {
     return (
       <div className="commentBox container">
         <h2>
-          Comments { this._isSendingAjax() && `SENDING AJAX REQUEST! Ajax Counter is ${this._ajaxCounter()}` }
+          Comments {this._isSendingAjax() && `SENDING AJAX REQUEST! Ajax Counter is ${this._ajaxCounter()}`}
         </h2>
         <p>
           Text take Github Flavored Markdown. Comments older than 24 hours are deleted.