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#
# A basic function to retrieve data in couchdb
#
module Puppet::Parser::Functions
newfunction(:couchdblookup, :type => :rvalue) do |args|
require 'json'
require 'open-uri'
url = args[0]
key = args[1]
raise Puppet::ParseError, ("couchdblookup(): wrong number of arguments (#{args.length}; must be == 2)") if args.length != 2
begin
json = JSON.parse(open(URI.parse(url)).read)
rescue OpenURI::HTTPError => error
raise Puppet::ParseError, "couchdblookup(): fetching URL #{url} failed with status #{error.message}"
end
result = nil
if json.has_key?("rows") and json['total_rows'] > 0 and json['rows'][0].has_key?(key)
result = Array.new
json['rows'].each do |x|
result.push(x[key])
end
else
if json.has_key?(key)
result = json[key]
end
end
result or raise Puppet::ParseError, "couchdblookup(): key '#{key}' not found in JSON object !"
end
end
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