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/*!
* Module dependencies.
*/
var mongodb = require('mongodb');
var ReadPref = mongodb.ReadPreference;
/*!
* Converts arguments to ReadPrefs the driver
* can understand.
*
* @param {String|Array} pref
* @param {Array} [tags]
*/
module.exports = function readPref(pref, tags) {
if (Array.isArray(pref)) {
tags = pref[1];
pref = pref[0];
}
if (pref instanceof ReadPref) {
return pref;
}
switch (pref) {
case 'p':
pref = 'primary';
break;
case 'pp':
pref = 'primaryPreferred';
break;
case 's':
pref = 'secondary';
break;
case 'sp':
pref = 'secondaryPreferred';
break;
case 'n':
pref = 'nearest';
break;
}
return new ReadPref(pref, tags);
};
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