blog: Use standard summaryLength or explicit summary length (if set)

[Staudey]

This removes some custom overrides of the summary length for blog posts and instead relies on the summaryLength hugo parameter where it's not manually set, and uses the manually set summary length set in single blog posts (set via <!--more-->).

Also allow paragraph html elements in the summary

25 seemed a good value for the default summary length in my testing

Resolves #41

[Staudey]

Comparison:

Automatic summary before:

Automatic summary after:

Manually set summary before (=ignored):

Manually set summary after:

[Staudey]

Note: I could also add a conditional to check whether the summary is truncated or contains the whole post content, and only if it is truncated render the "Read More" button, but I'm not sure if that wouldn't be overkill, since it would have to be a very short blog post to fit into it as a whole.

[EbonJaeger]

One thing, otherwise, LGTM.

[EbonJaeger]

Turning this element into a div and removing the unescape/plainify makes summaries with formatting (e.g., italics) display weird. This appears to work:

Suggested change

	<div itemprop="description">{{- safeHTML $firstBlog.Summary -}}</div>
	<p itemprop="description">{{- htmlUnescape (plainify (safeHTML $firstBlog.Summary)) -}}</p>

[Staudey]

Hmm, thanks, I see the problem with italics now after testing. Unfortunately this also loses paragraph separation for long summaries like in the current Hacktoberfest one. (I think that's why I originally turned it into a <div>)

I'll play around with it a bit more.

[Staudey]

How about:

Suggested change

	<div itemprop="description">{{- safeHTML $firstBlog.Summary -}}</div>
	{{ $summaryParagraphs := split $firstBlog.Summary "<p>" }}
	{{range $summaryParagraphs }}
	{{ if eq . "" }}
	{{ continue }}
	{{ end }}
	<p itemprop="description">{{ htmlUnescape (plainify (safeHTML .)) }}</p>
	{{end}}

This keeps the paragraphs separated, while escaping/removing other formatting

[Staudey]

Wow, that formatting looks ass here ^^

[EbonJaeger]

I think the formatting is because of tabs vs spaces xD

That said, I'm not entirely sure what that snippet is doing?

[Staudey]

Splitting the summary along paragraphs, then inserting those paragraphs as separate elements, but with all formatting inside of them plainified.

(and that one if is there to exclude that one empty element of the slice this split creates; maybe I'll find a more elegant solution)