From 224504905b88267e5a132583716d24b87e5416b7 Mon Sep 17 00:00:00 2001
From: ache <ache@ache.one>
Date: Thu, 23 Nov 2017 17:29:08 +0100
Subject: Init commit

---
 LICENSE      | 19 ++++++++++++++++
 README.md    |  3 +++
 app.js       | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 package.json | 21 +++++++++++++++++
 4 files changed, 117 insertions(+)
 create mode 100644 LICENSE
 create mode 100644 README.md
 create mode 100644 app.js
 create mode 100644 package.json

diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..9cf1062
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,19 @@
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..9f10c02
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# remark-mermaid-simple
+
+
diff --git a/app.js b/app.js
new file mode 100644
index 0000000..1080a20
--- /dev/null
+++ b/app.js
@@ -0,0 +1,74 @@
+const visit = require('unist-util-visit');
+
+
+const PLUGIN_NAME = 'remark-mermaid-simple';
+
+/**
+ * Given the MDAST ast, look for all fenced codeblocks that have a language of
+ * `mermaid` and pass that to mermaid.cli to render the image. Replaces the
+ * codeblocks with an image of the rendered graph.
+ *
+ * @param {object} ast
+ * @param {vFile} vFile
+ * @return {function}
+ */
+function visitCodeBlock(ast, vFile) {
+  return visit(ast, 'code', (node, index, parent) => {
+    const { lang, value, position } = node;
+    const destinationDir = getDestinationDir(vFile);
+
+    // If this codeblock is not mermaid, bail.
+    if (lang !== 'mermaid') {
+      return node;
+    }
+
+    const image = {
+      type: 'mermaid',
+      value: value,
+      data: {
+        hName: 'div',
+        hProperties: {
+          className: 'mermaid'
+        },
+        hChildren: [
+          {
+            type: 'text',
+            value: value
+          }
+        ]
+      }
+    };
+
+    parent.children.splice(index, 1, image);
+
+    return node;
+  });
+}
+
+/**
+ * Returns the transformer which acst on the MDAST tree and given VFile.
+ *
+ * @link https://github.com/unifiedjs/unified#function-transformernode-file-next
+ * @link https://github.com/syntax-tree/mdast
+ * @link https://github.com/vfile/vfile
+ * @return {function}
+ */
+function mermaid() {
+  /**
+   * @param {object} ast MDAST
+   * @param {vFile} vFile
+   * @param {function} next
+   * @return {object}
+   */
+  return function transformer(ast, vFile, next) {
+    visitCodeBlock(ast, vFile);
+
+    if (typeof next === 'function') {
+      return next(null, ast, vFile);
+    }
+
+    return ast;
+  };
+}
+
+module.exports = mermaid;
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..3d3600f
--- /dev/null
+++ b/package.json
@@ -0,0 +1,21 @@
+{
+  "name": "remark-mermaid-simple",
+  "version": "0.1",
+  "description": "A remark plugin for Markdown that replaces `mermaid` to block.",
+  "main": "app.js",
+  "scripts": {
+    "start": "node app.js"
+  },
+  "dependencies": {
+    "fs-extra": "^4.0.1",
+    "npm-which": "^3.0.1",
+    "unist-util-visit": "^1.1.3"
+  },
+  "author": "ache",
+  "license": "MIT",
+  "keywords": [
+    "mermaid",
+    "graphs",
+    "remark"
+  ]
+}
-- 
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