Index documents in Elasticsearch

[Daniel Zoller]

Please index the private documents of the users in elasticsearch to allow users to search through the content of their files Not every document of a post is a PDF/txt/PS file (like an image) => index only docs we can extract text from (txt is simple). Elasticsearch can't index pdf files out of the box, so the first step would be to search for a library that can extract text from files containing text.

Furthermore implement a update mechanism to the index because documents can be deleted and added to posts