discourse/app/assets/javascripts/discourse-common/lib/helpers.js.es6

93 lines
2.2 KiB
JavaScript

import { get } from "@ember/object";
import Helper from "@ember/component/helper";
export function makeArray(obj) {
if (obj === null || obj === undefined) {
return [];
}
return Array.isArray(obj) ? obj : [obj];
}
export function htmlHelper(fn) {
return Helper.helper(function(...args) {
args =
args.length > 1 ? args[0].concat({ hash: args[args.length - 1] }) : args;
return new Handlebars.SafeString(fn.apply(this, args) || "");
});
}
const _helpers = {};
function rawGet(ctx, property, options) {
if (options.types && options.data.view) {
var view = options.data.view;
return view.getStream
? view.getStream(property).value()
: view.getAttr(property);
} else {
return get(ctx, property);
}
}
export function registerHelper(name, fn) {
_helpers[name] = Helper.helper(fn);
}
export function findHelper(name) {
return _helpers[name] || _helpers[name.dasherize()];
}
export function registerHelpers(registry) {
Object.keys(_helpers).forEach(name => {
registry.register(`helper:${name}`, _helpers[name], { singleton: false });
});
}
function resolveParams(ctx, options) {
let params = {};
const hash = options.hash;
if (hash) {
if (options.hashTypes) {
Object.keys(hash).forEach(function(k) {
const type = options.hashTypes[k];
if (
type === "STRING" ||
type === "StringLiteral" ||
type === "SubExpression"
) {
params[k] = hash[k];
} else if (type === "ID" || type === "PathExpression") {
params[k] = rawGet(ctx, hash[k], options);
}
});
} else {
params = hash;
}
}
return params;
}
export function registerUnbound(name, fn) {
const func = function(...args) {
const options = args.pop();
const properties = args;
for (let i = 0; i < properties.length; i++) {
if (
options.types &&
(options.types[i] === "ID" || options.types[i] === "PathExpression")
) {
properties[i] = rawGet(this, properties[i], options);
}
}
return fn.call(this, ...properties, resolveParams(this, options));
};
_helpers[name] = Helper.extend({
compute: (params, args) => fn(...params, args)
});
Handlebars.registerHelper(name, func);
}