Rendering a volt view from a string

Maybe give this a try?

<?php

$this->view->purchase = PurchaseModel::findFirst($id);
$body =  "Thanks for your purchase, you can find the details here: " . $this->purchase->getUrl(); // or however your app gets the purchase url

It's easy. Look at https://docs.phalcon.io/en/latest/reference/volt.html#stand-alone-component

supernovagurl: The point was that the template strings would be user editable and stored in the database. My example was a bit misleading, the actual code would be something like this:

$template = TemplateModel::findFirst($template_id);
$this->view->purchase = PurchaseModel::findFirst($id);
$body = $this->view->renderString($template->body);

// $template->body = "Thanks for your purchase, you can find the details here: {{ static_url(purchase.getUrl()) }}"

Oleg: I tried that, but it got me only the half way through compiling the volt markup to PHP resulting to this:

Thanks for your purchase, you can find the details here: <?php echo $this->url->getStatic($purchase->getUrl()); ?>

I still need something to render this to plain text with the proper context.

Hi, Maybe you should:

• use beforeUpdate model to database to verify if user didn't paste unprivileged code, then afterUpdate to database, save the same template to disk, and use this template from disk
• submit NFR to github, describe how you see it and how it could help other users (i think that renderString() is good idea) and wait for next release to use it if phalcon add this functionality, but remember that priority is phalcon 2.0 based on zephir. As i know new things will be implemented to 2.x versions, 2.0 will be the same as 1.3 functionality

I think that for now my idea is good solution becasue of security, and that you benefit from system caching your template from disk

May this way help for you: file test.volt

<div>
    {% set key=true %}
    {% if key %}
        {{'inblock message'}}
    {% endif %}
</div>

Code

$compiler = new \Phalcon\Mvc\View\Engine\Volt\Compiler();

$compiler->compile('test.volt');
$plaintext = eval('; ?>'.file_get_contents($compiler->getCompiledTemplatePath()));
echo $plaintext;

Output

<div>
                inblock message    </div>

Or

$compiler = new \Phalcon\Mvc\View\Engine\Volt\Compiler();

$code = $compiler->compileString("Thanks for your purchase, 
you can find the details here: {% set key=true %}
    {% if key %}
        {{'test message'}}
    {% endif %}");

echo eval('; ?>'. $code);

Output

Thanks for your purchase, 
you can find the details here:             test message

// 1. Get template from database
$this->view->purchase = PurchaseModel::findFirst($id);

// 2. Create template as file
$fp = fopen('templates/purchase.volt', 'w');
fwrite($fp, $this->view->purchase->template);
fclose($fp);

// 3. Include template from file
{% include "templates/purchase.volt" %}

You know that the standard volt engine can render a string?

$parsed  = (new Volt($this->view, $this->getDI()))->getCompiler()->compileString($string);

Is there a solution for this issue? I need the same thing done like @mika and stuck also halfway.

$content = Page::findFirst(array(
    "conditions" => array("slug" => "subscription_mail")
));

$compiler = new Volt\Compiler();
$string = $compiler->compileString($content->content_parsed); // Returns the string ready for PHP ... 

I actually ended up implementing this without Volt and just using str_replace(). I figured that it's easier (and safer) for the user to use simple tags like %PRODUCT% and %PRICE% instead of learning the volt syntax.

an example of a solution to this problem is:

    public function getTemplateBody(string $content, array $viewData): string
    {
        if ($content === '') {
            return $content;
        }

        ob_start();
        \extract($viewData, EXTR_OVERWRITE);
        eval(' ?>'.$this->volt->getCompiler()->compileString($content));

        return ob_get_clean();
    }

Where $content is your Volt template string from db and $viewData is an array of params you would normally pass to $view->setVars()