From 9fcd8a90c7283a13ad7ec51b1940697688ee984a Mon Sep 17 00:00:00 2001
From: Ramiro Silveyra d'Avila <ramasilveyra1@gmail.com>
Date: Mon, 10 Apr 2017 23:43:59 -0300
Subject: [PATCH] Add unoptimized rule

---
 README.md                       |  2 ++
 src/rules/index.js              |  4 +++-
 src/rules/unoptimized/README.md | 12 ++++++++++++
 src/rules/unoptimized/index.js  | 25 +++++++++++++++++++++++++
 4 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 src/rules/unoptimized/README.md
 create mode 100644 src/rules/unoptimized/index.js

diff --git a/README.md b/README.md
index ecab970..cd20213 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,7 @@ Create the `.stylelintrc.json` config file (or open the existing one), add `styl
   "rules": {
     "images/broken": true,
     "images/prefer-data-uri": 256,
+    "images/unoptimized": true,
     ...
   }
 }
@@ -53,6 +54,7 @@ Please refer to [stylelint docs](http://stylelint.io/user-guide/) for the detail
 
 - [`broken`](./src/rules/broken/README.md): Checks if the images are broken.
 - [`prefer-data-uri`](./src/rules/prefer-data-uri/README.md): Suggest using data-URIs instead of an external image if their file size (in bytes) exceeds the limit.
+- [`unoptimized`](./src/rules/unoptimized/README.md): Checks if the images are unoptimized.
 
 ## Contribute
 
diff --git a/src/rules/index.js b/src/rules/index.js
index cfc0eff..75ff5a0 100644
--- a/src/rules/index.js
+++ b/src/rules/index.js
@@ -1,7 +1,9 @@
 import broken from './broken';
 import preferDataURI from './prefer-data-uri';
+import unoptimized from './unoptimized';
 
 export default {
   broken,
-  'prefer-data-uri': preferDataURI
+  'prefer-data-uri': preferDataURI,
+  unoptimized
 };
diff --git a/src/rules/unoptimized/README.md b/src/rules/unoptimized/README.md
new file mode 100644
index 0000000..750fa4f
--- /dev/null
+++ b/src/rules/unoptimized/README.md
@@ -0,0 +1,12 @@
+# unoptimized
+
+Checks if the images are unoptimized (uses [imagemin](https://github.com/imagemin/imagemin)).
+
+## Options
+
+### `true`
+
+The following patterns are considered warnings:
+
+
+The following patterns are not considered warnings:
diff --git a/src/rules/unoptimized/index.js b/src/rules/unoptimized/index.js
new file mode 100644
index 0000000..bdbebd1
--- /dev/null
+++ b/src/rules/unoptimized/index.js
@@ -0,0 +1,25 @@
+import { utils } from 'stylelint';
+import { namespace, generateListOfImagesURLsAndNodes, getImage } from '../../utils';
+
+export const ruleName = namespace('unoptimized');
+export const messages = utils.ruleMessages(ruleName, {
+  unexpected: imageURL => `Unexpected broken image "${imageURL}"`
+});
+
+export default function unoptimizedRule(enabled) {
+  return (root, result) => {
+    const validOptions = utils.validateOptions(result, ruleName, {
+      actual: enabled,
+      possible: [true, false]
+    });
+
+    if (!validOptions) {
+      return null;
+    }
+
+    const list = generateListOfImagesURLsAndNodes(root);
+
+    return checkIfImagesAreUnoptimized(list, result)
+      .then(results => reportUnoptimizedImages(results, result));
+  };
+}