397400b4f8
refs #9178 - this logic belongs to a static model helper - the visibility property is a model property, the knowledge about the visibility values belongs to the model - rename the functions, so they make more sense
108 lines
3.3 KiB
JavaScript
108 lines
3.3 KiB
JavaScript
// # Foreach Helper
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// Usage: `{{#foreach data}}{{/foreach}}`
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//
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// Block helper designed for looping through posts
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var proxy = require('./proxy'),
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_ = require('lodash'),
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logging = proxy.logging,
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i18n = proxy.i18n,
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models = proxy.models,
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hbsUtils = proxy.hbs.Utils,
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createFrame = proxy.hbs.handlebars.createFrame;
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function filterItemsByVisibility(items, options) {
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var visibilityArr = models.Base.Model.parseVisibilityString(options.hash.visibility);
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return models.Base.Model.filterByVisibility(items, visibilityArr, !!options.hash.visibility);
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}
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module.exports = function foreach(items, options) {
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if (!options) {
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logging.warn(i18n.t('warnings.helpers.foreach.iteratorNeeded'));
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}
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if (hbsUtils.isFunction(items)) {
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items = items.call(this);
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}
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// Exclude items which should not be visible in the theme
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items = filterItemsByVisibility(items, options);
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// Initial values set based on parameters sent through. If nothing sent, set to defaults
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var fn = options.fn,
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inverse = options.inverse,
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columns = options.hash.columns,
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length = _.size(items),
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limit = parseInt(options.hash.limit, 10) || length,
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from = parseInt(options.hash.from, 10) || 1,
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to = parseInt(options.hash.to, 10) || length,
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output = '',
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data,
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contextPath;
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// If a limit option was sent through (aka not equal to default (length))
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// and from plus limit is less than the length, set to to the from + limit
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if ((limit < length) && ((from + limit) <= length)) {
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to = (from - 1) + limit;
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}
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if (options.data && options.ids) {
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contextPath = hbsUtils.appendContextPath(options.data.contextPath, options.ids[0]) + '.';
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}
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if (options.data) {
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data = createFrame(options.data);
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}
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function execIteration(field, index, last) {
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if (data) {
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data.key = field;
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data.index = index;
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data.number = index + 1;
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data.first = index === from - 1; // From uses 1-indexed, but array uses 0-indexed
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data.last = !!last;
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data.even = index % 2 === 1;
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data.odd = !data.even;
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data.rowStart = index % columns === 0;
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data.rowEnd = index % columns === (columns - 1);
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if (contextPath) {
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data.contextPath = contextPath + field;
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}
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}
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output = output + fn(items[field], {
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data: data,
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blockParams: hbsUtils.blockParams([items[field], field], [contextPath + field, null])
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});
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}
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function iterateCollection(context) {
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// Context is all posts on the blog
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var current = 1;
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// For each post, if it is a post number that fits within the from and to
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// send the key to execIteration to set to be added to the page
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_.each(context, function (item, key) {
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if (current < from) {
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current += 1;
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return;
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}
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if (current <= to) {
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execIteration(key, current - 1, current === to);
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}
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current += 1;
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});
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}
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if (items && typeof items === 'object') {
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iterateCollection(items);
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}
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if (length === 0) {
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output = inverse(this);
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}
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return output;
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};
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