Implement Preview mode for drafts, allow inline comments on previews

[techwraith]

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[ben-ng]

+1 for this, i actually have a post i would like to do this with right now.

how would inline comments on previews work? once the original post gets edited the comment positions will go out of sync.

[techwraith]

I think we'll need to introduce the concept of post versions at this point. The cool thing there though is we get version control as a side effect.

Basically, people can comment on a version, but they can't comment on a specific line. The UX will need a lot of work to get this to feel right.

I was thinking that you'd send a link out to people with a unique version ID, then they'd highlight a line, and once highlighted, a menu will show up. In that menu will be "add comment". After clicking "add comment" a form will show up on the left side of the article in line with the highlighted text. Once the comment is submitted, a link will be inserted in that version around the highlighted text, when that link is clicked, the comment will be shown on the left.