[12.x] Add @​context Blade directive

[martinbean]

Adds a new @context Blade directive, that operates similar to the existing @session directive.

---

Context Directives

The @context directive may be used to determine if a context value exists. If the context value exists, the template contents within the @context and @endcontext directives will be evaluated. Within the @context directive’s contents, you may echo the $value variable to display the context value:

@context('foo')
    <div>{{ $value }}</div>
@endcontext

---

This makes it easy to check if a context value is set and if so, to obtain its value, in Blade templates. My particular use case:

@context('canonical')
    <link href="{{ $value }}" rel="canonical">
@endcontext

[devajmeireles]

This is good and useful. The only problem that I see with it is the fact that the context has two data: normal and hidden, so it might be better to add an argument @context('foo', hidden: true) - to determine which context you want to interact with, or add two separate directives: @context and @contextHidden

[martinbean]

@devajmeireles It just delegates to the context helper, which doesn’t make a distinction between hidden and non-hidden values when retrieving them:

framework/src/Illuminate/Foundation/helpers.php

Lines 332 to 350 in 6262237

	if (! function_exists('context')) {
	/**
	* Get / set the specified context value.
	*
	* @param array|string|null $key
	* @param mixed $default
	* @return ($key is string ? mixed : \Illuminate\Log\Context\Repository)
	*/
	function context($key = null, $default = null)
	{
	$context = app(ContextRepository::class);
	return match (true) {
	is_null($key) => $context,
	is_array($key) => $context->add($key),
	default => $context->get($key, $default),
	};
	}
	}

[devajmeireles]

@devajmeireles It just delegates to the context helper, which doesn’t make a distinction between hidden and non-hidden values when retrieving them:

framework/src/Illuminate/Foundation/helpers.php

Lines 332 to 350 in 6262237

	if (! function_exists('context')) {
	/**
	* Get / set the specified context value.
	*
	* @param array|string|null $key
	* @param mixed $default
	* @return ($key is string ? mixed : \Illuminate\Log\Context\Repository)
	*/
	function context($key = null, $default = null)
	{
	$context = app(ContextRepository::class);
	return match (true) {
	is_null($key) => $context,
	is_array($key) => $context->add($key),
	default => $context->get($key, $default),
	};
	}
	}

I see, maybe we can adapt the helper before your PR to enable interaction with hidden values.

[devajmeireles]

@martinbean I just noticed we can interact with the hidden data even if we do not have the hidden argument as part of the helper. All we need to do is interact with the helper without specifying the key:

context()->has('foo');
context()->hasHidden('bar');