candy/ctrlers/pager.js

a micro bbs system based on duoshuo.com apis

module.exports = function(collection, params, cb) {
    collection.count(params.filter).exec(function(err, count) {
        if (err) return cb(err);
        var page = parseInt(params.page);
        cb(null, {
            current: page ? page : 1,
            limit: params.limit,
            from: (page && page > 1) ? ((page - 1) * params.limit) : 0,
            max: Math.round(count / params.limit)
        });
    })
}