Add a function in leanbuild for handling iframes aka leanbuild::include_iframe()

[cansavvy]

There's a need for a include_iframe() function here. See https://github.com/jhudsl/leanbuild/pull/3/files#r692949964 for more context.

The idea would be to just supply an iframe link and turn it into something of this format:

{alt: "expectation document", height: "351", width: "568", align: "middle"}
![](https://widgets.figshare.com/articles/5427418/embed?show_title=1)

currently iframe links need to be supplied like:

<<p align="center"><iframe width="560" height="315" alt = "video of Russell McClain on biases and stereotypes" src="https://www.youtube.com/embed/yiZQaE0q9BY" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe></p>

I'm adding these to our test_cases.Rmd in https://github.com/jhudsl/DaSL_Course_Template_Bookdown/blob/main/03-test_cases.Rmd

[carriewright11]

I can edit the include_url() aspects of my scripts (which is currently supported) to also accommodate include_iframe().

For videos that would result in something like this:
{type: video, poster: 'http://img.youtube.com/vi/VOCYL-FNbr0/mqdefault.jpg',height: "400px", width: "100%", align: "middle"} ![Video](https://www.youtube.com/watch?v=yiZQaE0q9BY)

For embedded files it would result in:

Check out this [link](https://widgets.figshare.com/articles/5427418/embed?show_title=1)!

[cansavvy]

What I'm trying to do is move the code from your scripts into the package itself so that we don't have to call those scripts but we still have the functionality from those scripts automatically when someone installs the leanbuild package. I think what you're describing would still require we use extra scripts.

[carriewright11]

Yes, sorry I was in the middle of writing a new comment to say that I thought I misunderstood you. I thought you were talking about cases of include_iframe() instead of include_url.

[carriewright11]

I agree that we want to allow people to just use leanbuild - that is what I was hoping for as well and planning to do but just hadn't done yet. I figured we could incorporate my scripts into the package to just see if this worked and then work to functionalize my scripts, but it's ok to skip that step.

[carriewright11]

I don't think leanbuild does anything with iframes currently (not thinking about calling my scripts within it) so I got confused.

[cansavvy]

Ah. Yeah that's my point. I think we should make it so leanbuild does handle iframes. I probably didn't describe this well but that was my intent of this issue.

[cansavvy]

After chatting with @carriewright11 my understanding is that these are the things that are broken that I'm going to work on integrating fixes into the package:

• instances of knitr::include_url do not render to markua friendly
• youtube links need to be translated to watch links so they are clickable.
• youtube tags need to have the youtube image bit

[cansavvy]

This has been accomplished.