Use this action to generate an EPUB file from text or HTML content.
Input fields:

> title
(Required. The title of the EPUB book.)
> author
(Optional. The author name stored in the EPUB metadata. If blank, the plugin uses “Unknown.”)
> text_body
(Required. The main content of the book. This can be plain text or HTML depending on the HTML setting.)
> chapter_delimiter
(Optional. Text used to split the content into separate chapters. If left blank, the plugin creates a single-section EPUB.)
> chapter_titles
(Optional. Delimiter-separated list of custom chapter titles. The order should match the chapter order and use the same delimiter as chapter_delimiter. If left blank, the plugin uses automatic chapter naming.)
> language
(Optional. Language code for the EPUB metadata. Default is english [en].)
> filename
(Optional. Custom filename for the generated EPUB. If left blank, the plugin creates one from the title.)
> cover_url
(Optional. Public image URL used as the book cover. Cover image URLs are commonly provided as web URLs or file paths in EPUB generators.)
> chapter_image_urls
(Optional. Delimiter-separated list of public image URLs for chapter images. The order should match the chapter order.)
> chapter_image_alts
(Optional. Delimiter-separated list of alt text values for chapter images. The order should match the chapter image URLs.)
> use_html
(Yes/no field that controls how the content is interpreted. Yes = treat text_body as HTML and preserve supported tags, No = treat text_body as plain text and automatically convert it into paragraph HTML.)

Supported HTML formatting when use_html is yes:

> Bold: <strong>, <b>
> Italic: <em>, <i>
> Headings: <h1> to <h6>
> Paragraphs: <p>
> Images: <img>
> Line breaks
> Horizontal rules: <hr/>
> Links: <a>
> Lists: <ul>, <ol>, <li>
> Tables: <table>, <tr>, <td>
> Footnote-style anchor links using <a href="#..."> and matching targets

Returned values:

> success
(Indicates whether EPUB generation completed successfully.)
> file_base64
(The generated EPUB as a base64-encoded string.)
> file_name
(The filename to use when saving or downloading the EPUB.)
> chapter_count
(The number of sections or chapters generated.)
> mime_type
(The file MIME type, typically application/epub+zip.)
> error_message
(Error message returned if generation fails.)

Usage notes:

> Image URLs should be direct, public URLs that the server can fetch.
> chapter_titles should use the same delimiter and order as the chapter content so each title maps to the correct chapter. [github](https://github.com/cpiber/epub-gen-memory)
> If HTML mode is enabled, the plugin assumes the HTML is trusted and properly formatted.
> The base64 output usually needs to be passed to a Bubble file upload or download step to create the final .epub file.