Cool Rule – "Search & Swap"
Search & Swap
This rule “watches” searches on book-selling sites and informs the user if the same book is available at a local library. This rule has applications for just about any place where you want to divert traffic for specific items or information from one site to another.
ruleset library {
global {
datasource library_search
<- "http://www.example.com/bookdata/?wt=json" cachable;
}
rule book_notfication is active {
select using "www.amazon.com/gp/product/(\d+)/" setting(isbn)
pre {
book_data = datasource:library_search("q="+isbn);
url = book_data.pick("$..docs[0].url");
title = book_data.pick("$..docs[0].title");
msg = <<
This book's available at your local library.
Click here to see: <a id="MLN_link" href="#{url}">#{title}</a>
>>;
}
if(book_data.pick("$..numFound") > 0) then {
notify("Local Library", msg)
with sticky = true;
}
callbacks {
success { click class="MLN_link" }
}
}
}
In this example the user went to a book-selling site and searched for a specific business book. When the search results came up, the KNS rule recognized that this book was available at their local library and prompted them with a floating message.
