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/**
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cmd can be any valid ES query command
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**/
function service( backend, cmd, cb ){
// query new backend
backend().client.search( cmd, function( err, data ){
// handle backend errors
if( err ){ return cb( err ); }
// map returned documents
var docs = [];
if( data && data.hits && data.hits.total && Array.isArray(data.hits.hits)){
docs = data.hits.hits.map( function( hit ){
return hit._source;
});
}
// fire callback
return cb( null, docs );
});
}
module.exports = service;