# Dot Access Configuration

Given a deep data structure representing a configuration, access
configuration by dot notation.

This library combines [dflydev/dot-access-data](https://github.com/dflydev/dflydev-dot-access-data)
and [dflydev/placeholder-resolver](https://github.com/dflydev/dflydev-placeholder-resolver)
to provide a complete configuration solution.

## Requirements

 * PHP (5.3+)
 * [dflydev/dot-access-data](https://github.com/dflydev/dflydev-dot-access-data) (1.*)
 * [dflydev/placeholder-resolver](https://github.com/dflydev/dflydev-placeholder-resolver) (1.*)
 * [symfony/yaml](https://github.com/symfony/Yaml) (>2,<2.2) *(suggested)*

## Usage

Generally one will use an implementation of `ConfigurationBuilderInterface`
to build `ConfigurationInterface` instances. For example, to build a Configuration
out of a YAML file, one would use the `YamlFileConfigurationBuilder`:

```php
use Dflydev\DotAccessConfiguration\YamlFileConfigurationBuilder;

$configurationBuilder = new YamlFileConfigurationBuilder('config/config.yml');
$configuration = $configurationBuilder->build();
```

Once created, the Configuration instance behaves similarly to a Data
instance from [dflydev/dot-access-data](https://github.com/dflydev/dflydev-dot-access-data).

```php
$configuration->set('a.b.c', 'ABC');
$configuration->get('a.b.c');
$configuration->set('a.b.e', array('A', 'B', 'C'));
$configuration->append('a.b.e', 'D');
```

## Custom Configurations

Configuration Builders use Configuration Factories and Placeholder Resolver
Factories behind the scenes in order to build a working configuration.

Under normal circumstances one should not need to do anything with the
Placeholder Resolver Factory. However, one may wish to extend the
default `Configuration` class or use an entirely different implementation
altogether.

In order to build instances of custom `ConfigurationInterface` implementations
with the standard builders, one would need to implement
`ConfigurationFactoryInterface` and inject it into any
`ConfigurationBuilderInterface`.

If a Configuration is declared as follows:
```php
namespace MyProject;

use Dflydev\DotAccessConfiguration\Configuration;

class MyConf extends Configuration
{
    public function someSpecialMethod()
    {
        // Whatever you want here.
    }
}
```

Create the following factory:
```php
namespace MyProject;

use Dflydev\DotAccessConfiguration\ConfigurationFactoryInterface;

class MyConfFactory implements ConfigurationFactoryInterface
{
    /**
     * {@inheritdocs}
     */
    public function create()
    {
        return new MyConf;
    }
}
```

To use the factory with any builder, inject it as follows:
```php
use Dflydev\DotAccessConfiguration\YamlFileConfigurationBuilder;
use MyProject\MyConfFactory;

$configurationBuilder = new YamlFileConfigurationBuilder('config/config.yml');

// Inject your custom Configuration Factory
$configurationBuilder->setConfigurationFactory(new MyConfFactory);

// Will now build instances of MyConfFactory instead of
// the standard Configuration implementation.
$configuration = $configurationBuilder->build();
```

## License

This library is licensed under the New BSD License - see the LICENSE file
for details.

## Community

If you have questions or want to help out, join us in the
[#dflydev](irc://irc.freenode.net/#dflydev) channel on irc.freenode.net.