Get sections from an episode's HTML page

Usage

get_content(
  episode,
  content = "*",
  label = FALSE,
  pkg = NULL,
  instructor = FALSE
)

Arguments

episode: an object of class xml_document, a path to a markdown or html file of an episode.
content: an XPath fragment. defaults to "*"
label: if TRUE, elements will be named by their ids. This is best used when content = "section".
pkg: an object created via pkgdown::as_pkgdown() of a lesson.
instructor: if TRUE, the instructor version of the episode is read, defaults to FALSE. This has no effect if the episode is an xml_document.

Details

The contents of the lesson are contained in the following templating cascade:

<body>
  <div class='container'>
    <div class='row'>
      <div class='[...] primary-content'>
        <main>
          <div class='[...] lesson-content'>
            CONTENT HERE

This function will extract the content from the episode without the templating.

Examples

if (FALSE) {
lsn <- "/path/to/lesson"
pkg <- pkgdown::as_pkgdown(fs::path(lsn, "site"))

# for AiO pages, this will return only the top-level sections:
get_content("aio", content = "section", label = TRUE, pkg = pkg)

# for episode pages, this will return everything that's not template
get_content("01-introduction", pkg = pkg)

# for things that are within lessons but we don't know their exact location,
# we can prefix a `/` to double up the slash, which will produce 

}