Support module for UserFrosting 4

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This module contains support classes for UserFrosting and related modules.

Exception

userfrosting/support provides a number of custom exception types used by the main UserFrosting project:

RuntimeException
- FileNotFoundException
- JsonException
HttpException
- BadRequestException
- ForbiddenException
- NotFoundException

HttpException

A large portion of UserFrosting's exception types inherit from the HttpException class.

The HttpException class acts like a typical exception, but it maintains two additional parameters internally: a list of messages (UserMessage) that the exception handler may display to the client, and a status code that should be returned with the response. As a simple example, consider the BadRequestException:

<?php
class BadRequestException extends HttpException
{
    protected $defaultMessage = 'Bad data!';
    protected $httpErrorCode = 400;
}

It defines a default message, 'Bad data!', that a registered exception handler can display on an error page or push to the alert stream. It also sets a default HTTP status code to return with the error response.

The default message can be overridden when the exception is thrown in your code:

$e = new BadRequestException("This is the exception message that will be logged for the dev/sysadmin.");
$e->addUserMessage("This is a custom error message that will be sent back to the client.  Hello, client!");
throw $e;

Repository

userfrosting/support provides a generic Repository class that extends Laravel's base Repository, and on which various other UserFrosting components depend. For example, UserFrosting's config, translator, and Fortress schema all store their data in a UserFrosting Repository or child class.

The Repository class provides the following methods:

`has(string $key)`

Determine if the given configuration value exists.

`get(string $key, mixed $default = null)`

Get the specified configuration value.

`set(array|string $key, mixed $value = null)`

Set a given configuration value.

`prepend(string $key, mixed $value)`

Prepend a value onto an array configuration value.

`push(string $key, mixed $value)`

Push a value onto an array configuration value.

`all()`

Get all of the configuration items for the application.

`mergeItems(string $key = null, mixed $items)`

Merge a value or array of values into the repository using array_replace_recursive at the chosen key. If the $key is null, it will merge into the entire repository.

Loaders

Loader classes allow you to load repository data from multiple sources and merge them into a common data structure. The abstract class FileRepositoryLoader manages an ordered list of file paths. When the load method is called on a concrete implementation of FileRepositoryLoader, it will use the implementation of parseFile to read the contents of each file and merge them together, returning an array of the merged contents. The load method uses the array_replace_recursive function to perform this merge.

As an example, consider the YamlFileLoader implementation that loads two schema files:

# core/schema/contact.yaml

name:
    validators:
        length:
            min: 1
            max: 200
            message: Please enter a name between 1 and 200 characters.
        required :
            message : Please specify your name.

email:
    validators:
        length:
            min: 1
            max: 150
            message: Please enter an email address between 1 and 150 characters.

        email:
            message : That does not appear to be a valid email address.

# account/schema/contact.yaml

email:
    validators:
        required:
            message: Please specify your email address.

message:
    validators:
        required:
            message: Please enter a message

To load and merge these two schema files into a Respository:

$loader = new \UserFrosting\Support\Repository\Loader\YamlFileLoader([
    'core/schema/contact.yaml',
    'account/schema/contact.yaml'
]);
$schema = new \UserFrosting\Support\Repository\Repository($loader->load());

Path Builders

The abstract PathBuilder class uses an instance of the UniformResourceLocator to build a customized list of paths that can be passed into a Loader class.

For example, the StreamPathBuilder class takes a UniformResourceLocator and a stream path that has been registered with the locator, and returns a list of matching paths when you call the buildPaths method:

$builder = new \UserFrosting\Support\Repository\PathBuilder\StreamPathBuilder($this->locator, 'owls://megascops.php');
$paths = $builder->buildPaths();

// Returns a list of paths matching owls://megascops.php:
[
    '/core/owls/megascops.php',
    '/account/owls/megascops.php',
    '/admin/owls/megascops.php'
]

You can define other PathBuilder classes to customize the way this list of paths is constructed. Simply implement the buildPaths method, returning an array of generated paths in the order in which they should be loaded by a Loader class.

DotenvEditor

The DotenvEditor class provides an implementation of JackieDo Laravel-Dotenv-Editor package for UserFrosting. This can be used to read and write the .env configuration file (or files with same structure and syntax).

For complete usage of DotenvEditor class, see .

userfrosting/support