How to create a citation/quote from a Postgres text field?

I have a database with a lot of text and I want to find the surrounding text for a word that I am searching for i.e. If I search this text for "text" I should get something like (and more consistent than):

• .. lot of text and ..


• .. the surrounding text for ..


• .. this text for "text"..


• .. for "text" I should ..

I can write this in a program but I wondered if there is a good SQL trick to get something approaching this with just a query for a quick and dirty report.