OpenGraph for search link

[yelizariev]

Feature request.

Add following OpenGraph meta to html body:

<meta property="og:title" content="{{Search for QUERY in REPO_NUM repositories}}">
<meta property="og:type" content="website">
<meta property="og:url" content="{{ ---the same as original url--- }}">
<meta property="og:image" content="{{ ---Link for an image with results preview. See below--- }}}">
<meta property="og:description" content="{{  Found ~TOTAL_RESULTS results }}">

Image

For example, for a link https://odoo-source.com/?q=Pedro+M.+Baeza&excludeFiles=po%24%7Cpot%24%7Cyml%24%7Cyaml%24%7Ccss%24%7C%2Fstatic%2Flib%2F&files=&i=nope&repos=13.0
the image should be similar to first result of the search:

i.e.

• has repo name
• has file name
• has lines numbers
• contains some lines before and lines after
• highlights the match

Additionally it must have text at the bottom aligned right and equal to page title + website domain. For example above it's "RegExp search in Odoo source and OCA modules | odoo-source.com"

The image must be in png format.

Image size is 1200 x 630

Text must be readable (not too small)

text fields

• QUERY is q value, i.e. Pedro M. Baeza in example above
• REPO_NUM is num of repositories that match repos filter
• TOTAL_RESULTS is computed as sum of len(PreSearchResponse.Files) in all repos