Options

code-distortion/options is a PHP library for managing options in a flexible and expressive way.

use CodeDistortion\Options\Options;

$results = Options::new('sendEmails sendSms !sendSlack plan=gold value=123.45')->all();

// [ 'sendEmails' => true,
//   'sendSms' => true,
//   'sendSlack' => false,
//   'plan' => 'gold',
//   'value' => 123.45 ]

Table of Contents

• Installation
• Usage
  • Simple Usage
  • Programmatic Usage
• Specifying Default Values
• Restricting Options
• Validation
• Fluent Interface
• Which Types Of Values Can I Specify?
  • Expressive String Format
  • Array Key-Value-Pairs

Installation

Install the package via composer:

composer require code-distortion/options

Usage

Simple Usage

Specify values by passing them to Options::new(). This will take your set of options and break them down into individual ones.

An instance of Options is returned. Call all() on it to get the resolved values.

use CodeDistortion\Options\Options;

$results = Options::new('sendEmails sendSms !sendSlack')->all();
// or
$results = Options::new()->options('sendEmails sendSms !sendSlack')->all();

// [ 'sendEmails' => true,
//   'sendSms' => true,
//   'sendSlack' => false ]

all() will return the options in alphabetical order.

Programmatic Usage

You can also interact with your Options instance in a more programmatic fashion.

use CodeDistortion\Options\Options;

$options = Options::new('sendEmails sendSms !sendSlack');
// or
$options = Options::new()->options('sendEmails sendSms !sendSlack');

$has = $options->has('sendEmails');   // true
$has = $options->has('sendTweet');    // false
$value = $options->get('sendEmails'); // true
$value = $options->get('sendTweet');  // null

Calling options() multiple times will replace the previous options.

However you can amend the existing options by calling amendOptions(). This allows you to add or override existing options with new ones.

$myOptions = 'sendEmails sendSms sendSlack';
$extraOptions = '!sendSms';
$options = Options::new()
    ->options($myOptions)
    ->amendOptions($extraOptions);

Specifying Default Values

You can apply default values to use by passing them to defaults(). The default values will be applied for any options that aren't specified when calling options().

It doesn't matter which order you call defaults() and resolve() in.

$options = Options::new()
    ->defaults('sendEmails sendSms sendSlack')
    ->options('!sendEmails');

$options->get('sendEmails'); // false
$options->get('sendSms');    // true

Calling defaults() multiple times will replace the previous defaults.

However you can amend the existing defaults by calling amendDefaults(). This allows you to add or override existing defaults with new ones.

$defaults = 'sendEmails sendSms sendSlack';
$quietModeDefaults = '!sendSms';
$options = Options::new()
    ->defaults($defaults)
    ->amendDefaults($quietModeDefaults);

Restricting Options

You can restrict the possible options to those available in the defaults by calling restrictUnexpected().

Options passed to options() that aren't present in the defaults will generate an InvalidOptionException.

// the 'sendTweet' option is allowed because restrictUnexpected() was not called
$options = Options::new()
    ->defaults('sendEmails sendSms !sendSlack')
    ->options('sendTweet');

// InvalidOptionException: "The option "sendTweet" was not expected"
$options = Options::new()
    ->defaults('sendEmails sendSms !sendSlack')
    ->restrictUnexpected()
    ->options('sendTweet');

Validation

You can validate the options by passing a callback to validator().

Each option will be passed to your callback, letting you choose if it's valid.

If your callback returns false, that option will be ignored.

$validatorCallback = function (string $name, $value, bool $wasExpected): bool {
    return is_bool($value); // ensure the value is a boolean
};

// sendEmails is ignored because it's not a boolean
Options::new()
    ->validator($validatorCallback)
    ->defaults('sendEmails sendSms !sendSlack')
    ->options('sendEmails=yes');

You can also pass a second parameter to validator() instructing it to throw an exception if a value is invalid.

// InvalidOptionException: "The option "sendEmails" and/or it's value "yes" are not allowed"
Options::new()
    ->validator($validatorCallback, true) // <<<
    ->defaults('sendEmails sendSms !sendSlack')
    ->options('sendEmails=yes');

Fluent Interface

The options(), amendOptions(), defaults(), amendDefaults(), restrictUnexpected() and validator() methods can be chained together, and can be called in any order.

// instantiate
$options = new Options();
$options = new Options($myOptions);
$options = Options::new();
$options = Options::new($myOptions);

// call and chain any of these, in any order
$options->options($myOptions)
    ->amendOptions($extraOptions)
    ->defaults($defaults)
    ->amendDefaults($extraDefaults)
    ->restrictUnexpected()
    ->validator($validatorCallback);

// then consult your Options instance like normal
$results = $options->all();
$has = $options->has('sendEmails');
$value = $options->get('sendEmails');

Which Types Of Values Can I Specify?

Expressive String Format

You can specify values as strings, with or without modifiers.

'myVal' // ['myVal' => true]

// with modifiers
'+myVal' // ['myVal' => true]
'-myVal' // ['myVal' => false]
'!myVal' // ['myVal' => false]

// special values
'myVal=true'   // ['myVal' => true] (boolean true)
'myVal=false'  // ['myVal' => false] (boolean false)
'myVal=null'   // ['myVal' => null] (actual null)
'myVal=100'    // ['myVal' => 100] (an integer)
'myVal=123.45' // ['myVal' => 123.45] (a float)

// strings
'myVal='          // ['myVal' => '']
'myVal=somevalue' // ['myVal' => 'somevalue']

// quoted value strings
'myVal="true"'           // ['myVal' => 'true'] (not a boolean)
'myVal="some value"'     // ['myVal' => 'some value']
'myVal="some \"value\""' // ['myVal' => 'some "value"']
"myVal='some value'"     // ['myVal' => 'some value']
"myVal='some \'value\''" // ['myVal' => "some 'value'"]
"myVal=\"new\nline\""    // ['myVal' => "new\nline"]

// quoted key strings
'"my val"=true'     // ['my val' => true]
'"my \"val\""=true' // ['my "val"' => true]
"'my val'=true"     // ['my val' => true]
"'my \'val\''=true" // ["my 'val'" => true]

Multiple string values can be passed together at the same time, separated with spaces " " or a comma "," (or both):

'myVal1=abc +myVal2 -myVal3'   // ['myVal1' => 'abc', 'myVal2' => true, 'myVal3' => false']
'myVal1=abc,+myVal2,-myVal3'   // ['myVal1' => 'abc', 'myVal2' => true, 'myVal3' => false']
'myVal1=abc, +myVal2, -myVal3' // ['myVal1' => 'abc', 'myVal2' => true, 'myVal3' => false']

Array Key-Value-Pairs

Regular expressions are used to examine the string values above. You may wish to use them for convenience, or use plain arrays like below for faster speed.

['myVal' => true]
['myVal' => false]
['myVal' => 'some value']
['my val' => 'some value']
// etc

Note: You can specify non-scalar values when passing key-value-pair arrays (e.g. nested arrays), however they aren't dealt with in any special way. They are currently treated like scalar values.

Testing This Package

• Clone this package: git clone https://github.com/code-distortion/options.git .
• Run composer install to install dependencies
• Run the tests: composer test

Changelog

Please see CHANGELOG for more information on what has changed recently.

SemVer

This library uses SemVer 2.0.0 versioning. This means that changes to X indicate a breaking change: 0.0.X, 0.X.y, X.y.z. When this library changes to version 1.0.0, 2.0.0 and so forth, it doesn't indicate that it's necessarily a notable release, it simply indicates that the changes were breaking.

Treeware

This package is Treeware. If you use it in production, then we ask that you buy the world a tree to thank us for our work. By contributing to the Treeware forest you’ll be creating employment for local families and restoring wildlife habitats.

Contributing

Please see CONTRIBUTING for details.

Code of Conduct

Please see CODE_OF_CONDUCT for details.

Security

If you discover any security related issues, please email tim@code-distortion.net instead of using the issue tracker.

Credits

• Tim Chandler

License

The MIT License (MIT). Please see License File for more information.