Ghost/core/server/helpers/prev_next.js
Hannah Wolfe 243b387063 Helper Proxy & single express-hbs instance (#8225)
refs #8126, #8221, #8223

 New 'Proxy' for all helper requires
- this is not currently enforced, but could be, much like apps
- the proxy object is HUGE
- changed date to use SafeString, this should have been there anyway
- use the proxy for all helpers, including those in apps 😁

 🎨 Single instance of hbs for theme + for errors
- we now have theme/engine instead of requiring express-hbs everywhere
- only error-handler still also requires express-hbs, this is so that we can render errors without extra crud
- TODO: remove the asset helper after #8126 IF it is not needed, or else remove the TODO

🎨 Cleanup visibility utils
🎨 Clean up the proxy a little bit
🚨 Unskip test as it now works!
🎨 Minor amends as per comments
2017-04-04 18:07:35 +02:00

45 lines
1.4 KiB
JavaScript

// ### prevNext helper exposes methods for prev_post and next_post - separately defined in helpers index.
// Example usages
// `{{#prev_post}}<a href ="{{url}}>previous post</a>{{/prev_post}}'
// `{{#next_post}}<a href ="{{url absolute="true">next post</a>{{/next_post}}'
var proxy = require('./proxy'),
Promise = require('bluebird'),
api = proxy.api,
isPost = proxy.checks.isPost,
fetch;
fetch = function fetch(apiOptions, options) {
return api.posts.read(apiOptions).then(function (result) {
var related = result.posts[0];
if (related.previous) {
return options.fn(related.previous);
} else if (related.next) {
return options.fn(related.next);
} else {
return options.inverse(this);
}
});
};
// If prevNext method is called without valid post data then we must return a promise, if there is valid post data
// then the promise is handled in the api call.
module.exports = function prevNext(options) {
options = options || {};
var apiOptions = {
include: options.name === 'prev_post' ? 'previous,previous.author,previous.tags' : 'next,next.author,next.tags'
};
if (isPost(this) && this.status === 'published') {
apiOptions.slug = this.slug;
return fetch(apiOptions, options);
} else {
return Promise.resolve(options.inverse(this));
}
};