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