paginate helper

example

var paginate = require('handlebars-paginate');

Handlebars.registerHelper('paginate', paginate);

/* ... */

var html = template({pagination: {
  page: 3,
  pageCount: 10
}});

hbs

<div class="pagination pagination-centered">
  <ul>
    {{#paginate pagination type="previous"}}
      <li {{#if disabled}}class="disabled"{{/if}}><a href="?p={{n}}" >Prev</a></li>
    {{/paginate}}
    {{#paginate pagination type="middle" limit="7"}}
      <li {{#if active}}class="active"{{/if}}><a href="?p={{n}}">{{n}}</a></li>
    {{/paginate}}
    {{#paginate pagination type="next"}}
      <li {{#if disabled}}class="disabled"{{/if}}><a href="?p={{n}}">Next</a></li>
    {{/paginate}}
  </ul>
</div>

paginate.js

module.exports = function(pagination, options) {
    var type = options.hash.type || 'middle';
    var ret = '';
    var pageCount = Number(pagination.total);
    var page = Number(pagination.page);
    var limit;
    if (options.hash.limit) limit = +options.hash.limit;

    //page pageCount
    var newContext = {};
    switch (type) {
        case 'middle':
            if (typeof limit === 'number') {
                var i = 0;
                var leftCount = Math.ceil(limit / 2) - 1;
                var rightCount = limit - leftCount - 1;
                if (page + rightCount > pageCount)
                    leftCount = limit - (pageCount - page) - 1;
                if (page - leftCount < 1)
                    leftCount = page - 1;
                var start = page - leftCount;

                while (i < limit && i < pageCount) {
                    newContext = { n: start };
                    if (start === page) newContext.active = true;
                    ret = ret + options.fn(newContext);
                    start++;
                    i++;
                }
            }
            else {
                for (var i = 1; i <= pageCount; i++) {
                    newContext = { n: i };
                    if (i === page) newContext.active = true;
                    ret = ret + options.fn(newContext);
                }
            }
            break;
        case 'previous':
            if (page === 1) {
                newContext = { disabled: true, n: 1 }
            }
            else {
                newContext = { n: page - 1 }
            }
            ret = ret + options.fn(newContext);
            break;
        case 'next':
            newContext = {};
            if (page === pageCount) {
                newContext = { disabled: true, n: pageCount }
            }
            else {
                newContext = { n: page + 1 }
            }
            ret = ret + options.fn(newContext);
            break;
    }

    return ret;
};