From 518a6ab9646af0848450f2cfbd89567b3abfc6fb Mon Sep 17 00:00:00 2001
From: Harry Maynard <maynard321@gmail.com>
Date: Sat, 17 Aug 2024 22:25:11 -0700
Subject: [PATCH] Generating EPub file from markdown!

---
 .github/workflows/ci.yml |  1 -
 action.js                | 66 +++++++++++++++++++++++++---------------
 action.yml               |  4 +++
 test-data/chapter-01.md  |  4 +--
 test-data/chapter-02.md  |  3 ++
 5 files changed, 50 insertions(+), 28 deletions(-)
 create mode 100644 test-data/chapter-02.md

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 45f543d..accc0e9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,6 @@ jobs:
         uses: harrymaynard/markdowntoepub-action@main
         with:
           markdownFiles: |-
-            README.md
             test-data/*.md
           title: My Book
           author: Harry Maynard
diff --git a/action.js b/action.js
index ea85859..72b8205 100644
--- a/action.js
+++ b/action.js
@@ -16,29 +16,62 @@ const version = parseInt(process.env.INPUT_VERSION) || 3
 const lang = process.env.INPUT_LANG || 'en'
 const tocTitle = process.env.INPUT_TOCTITLE || undefined
 const hideToC = process.env.INPUT_HIDETOC === 'true'
+const output = process.env.INPUT_OUTPUT || 'book.epub'
 
 if (!markdownFiles) {
   console.error('Missing required input: \'markdownFiles\'')
   process.exit(1)
 }
 
-const includes = markdownFiles?.split('\\n') || []
-let allMarkdown = ''
+if (!title) {
+  console.error('Missing required input: \'title\'')
+  process.exit(1)
+}
+
+if (!author) {
+  console.error('Missing required input: \'author\'')
+  process.exit(1)
+}
 
-console.log('markdownFiles:', markdownFiles)
+const includes = markdownFiles?.split('\\n') || []
+const chapters = []
 
 for (const includeIndex in includes) {
   const regex = includes[includeIndex]
   const markdownFileNames = await glob(regex.trim(), { ignore: 'node_modules/**' })
-  console.log('markdownFileNames:', markdownFileNames)
+
+  // Sort the markdown files by name.
+  if (markdownFileNames.length > 0) {
+    markdownFileNames.sort()
+  }
+  
   for (const fileIndex in markdownFileNames) {
     const markdownFileName = markdownFileNames[fileIndex]
+
+    // Read the markdown file to get the content of the file.
     const markdown = fs.readFileSync(path.resolve(import.meta.dirname, markdownFileName)).toString().trim()
-    allMarkdown += `${markdown}\n\n`
+
+    // Extract chapter title from markdown metadata.
+    const chapterTitleMatch = markdown.match(/\[metadata:title\]:- "([^"]+)"/i)
+    const chapterTitle = chapterTitleMatch ? chapterTitleMatch[1] : undefined
+
+    // Extract chapter author from markdown metadata.
+    const chapterAuthorMatch = markdown.match(/\[metadata:author\]:- "([^"]+)"/i)
+    const chapterAuthor = chapterAuthorMatch ? chapterAuthorMatch[1] : undefined
+
+    // Generate the HTML content from markdown.
+    const html = marked.parse(markdown)
+    
+    // Concatenate the chapter to the chapters list.
+    chapters.push({
+      title: chapterTitle,
+      author: chapterAuthor,
+      data: html,
+    })
+    console.log('Generated chapter from markdown file:', markdownFileName)
   }
 }
 
-
 const option = {
   title,
   author,
@@ -49,28 +82,13 @@ const option = {
   tocTitle,
   hideToC,
   verbose: true,
-  content: [
-    {
-        title: "About the author", // Optional
-        author: "John Doe", // Optional
-        data: "<h2>Charles Lutwidge Dodgson</h2>"
-        +"<div lang=\"en\">Better known by the pen name Lewis Carroll...</div>" // pass html string
-    },
-    {
-        title: "Down the Rabbit Hole",
-        data: "<p>Alice was beginning to get very tired...</p>"
-    },
-  ]
+  content: chapters,
 }
 
 try {
-  const epub = new EPub(option, 'book.epub');
+  const epub = new EPub(option, output);
   await epub.render()
-  console.log('Ebook Generated Successfully!')
+  console.log('Ebook Generated Successfully! Output:', output)
 } catch (error) {
   console.error('Failed to generate Ebook because of:', error);
 }
-const html = marked.parse(allMarkdown)
-console.log('html:', html, '\n')
-
-
diff --git a/action.yml b/action.yml
index bb43195..9b4b571 100644
--- a/action.yml
+++ b/action.yml
@@ -38,6 +38,10 @@ inputs:
     description: 'Hide the table of contents. Default is false.'
     required: false
     default: 'false'
+  output:
+    description: 'Name of the output EPub file'
+    required: false
+    default: 'book.epub'
 
 runs:
   using: 'docker'
diff --git a/test-data/chapter-01.md b/test-data/chapter-01.md
index c5edebb..ee0e70e 100644
--- a/test-data/chapter-01.md
+++ b/test-data/chapter-01.md
@@ -1,6 +1,4 @@
-[metadata:chapter]:- "Chapter 1"
+[metadata:title]:- "Chapter 1"
 [metadata:author]:- "Harry Maynard"
 
-## Chapter 1
-
 Lorem ipsum dolor sit amet, consectetur adipiscing elit.
diff --git a/test-data/chapter-02.md b/test-data/chapter-02.md
new file mode 100644
index 0000000..63f0902
--- /dev/null
+++ b/test-data/chapter-02.md
@@ -0,0 +1,3 @@
+[metadata:title]:- "Chapter 2"
+
+Lorem ipsum dolor sit amet, consectetur adipiscing elit.