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| <?php | |
| // The goal is to turn any rendering calls part of a rendering tree into | |
| // Hacklang async functions. Within compiled Twig templates this is tricky, | |
| // because the `await foo()` syntax is not a true expression, and can only | |
| // be used as part of assignment or return statements. That means that I | |
| // need to turn this: | |
| echo $this->env->getExtension('sandbox')->ensureToStringAllowed( | |
| $this->env->getExtension('drupal_core')->escapeFilter($this->env, (isset($context["exposed"]) ? $context["exposed"] : null), "html", null, true) | |
| ); | |
| // Into this: | |
| $html = await $this->env->getExtension('hackutils')->asyncEscapeFilter($this->env, (isset($context["exposed"]) ? $context["exposed"] : null), "html", null, true); | |
| echo $this->env->getExtension('sandbox')->ensureToStringAllowed($html); | |
| // | |
| // HOWEVER: | |
| // | |
| // The most ideal would be to gather up all variables for which this is | |
| // desired into a keyed map and pass them through an async mapping function, like so: | |
| // A map is just a native Hack collection with keyed values. | |
| $vars = Map { | |
| 'content.exposed' => (isset($context["exposed"]) ? $context["exposed"] : null), | |
| 'content.image' =>(isset($context["image"]) ? $context["image"] : null), | |
| }; | |
| // HH\asio\mm() maps an iterable through an async callback and returns an | |
| // awaitable Map. This lets the individual asyncEscapeFilters complete in | |
| // whatever order the scheduler thinks best. | |
| $rendered = mm($vars, ($value) ==> { | |
| $html = await $this->env->getExtension('hackutils')->asyncEscapeFilter($this->env, $value, "html", null, true); | |
| return $this->env->getExtension('sandbox')->ensureToStringAllowed($html); | |
| }); | |
| await $rendered; | |
| echo $rendered['content.exposed']; | |
| echo $rendered['content.image']; |
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