How to automatically generate newsfeeds or storylines from an RSS feed stream?

Question

API

There is a following task.
We have: several hundred RSS feeds from various sources.
Task: from this stream, automatically generate plot collections for display on the site or news chains on the same topic.
Question: maybe someone knows if there is a "boxed" or other solution that has an API, or is it licensed? The option to write yourself in this particular case is not considered.

Answer 1

Did the same based on tiny tiny rss
Example of uploading new news to csv
https://gist.github.com/QW0101/147b401977336fc96812
Config example

{
  "feeds":["ПНООЛР","лимит отход",......],
  "fields":[
    {
      "name":"Искомое слово (словосочетание)",
      "regexp":"~Искомое слово \\(словосочетание\\)\\: <\/strong>(.*)<br\/><strong>~mUui"
    },
........
  ]
}

Call update_csv.php?config=<config name>.json
Install tini according to this scheme habrahabr.ru/post/187564