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Add create_assoc function
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4 files changed

+203
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‎composer.json‎

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@@ -20,7 +20,8 @@
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"require-dev": {
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"phpunit/phpunit": "~6",
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"squizlabs/php_codesniffer": "~3.0",
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"friendsofphp/php-cs-fixer": "^2.14"
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"friendsofphp/php-cs-fixer": "^2.14",
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"apantle/hashmapper": "^1.3"
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},
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"autoload": {
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"psr-4": {"Functional\\": "src/Functional"},
@@ -35,6 +36,7 @@
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"src/Functional/Concat.php",
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"src/Functional/Contains.php",
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"src/Functional/Converge.php",
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"src/Functional/CreateAssoc.php",
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"src/Functional/Curry.php",
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"src/Functional/CurryN.php",
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"src/Functional/Difference.php",

‎src/Functional/CreateAssoc.php‎

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<?php
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/**
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* Copyright (C) 2019 by Jesus Franco Martinez <tezcatl@fedoraproject.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18+
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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namespace Functional;
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/**
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* Return a function that applies a set of functions to build an
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* associative array from a single input (scalar, object or sequence)
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*
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* @param array $specs associative array of keys and functions that map to the target
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* @param object|null $tameme
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* @return callable
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*/
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function create_assoc(array $specs, $tameme = null): callable
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{
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return function ($input, $optional = null) use ($specs, $tameme) {
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$mecapal = [];
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foreach ($specs as $target => $mapper) {
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$mecapal[$target] = is_unary($mapper)
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? \call_user_func($mapper, $input)
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: \call_user_func($mapper, $input, $optional, $tameme)
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;
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}
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return $mecapal;
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};
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}
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/**
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* determine if the callable passed expect only one argument
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* @param callable $callable
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* @return bool
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* @throws \ReflectionException
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*/
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function is_unary($callable)
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{
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if (!\is_callable($callable)) {
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return false;
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}
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$reflector = new \ReflectionFunction($callable);
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return \boolval($reflector->getNumberOfParameters() === 1);
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}

‎src/Functional/Functional.php‎

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@@ -54,6 +54,11 @@ final class Functional
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*/
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const converge = '\Functional\converge';
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/**
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* @see \Functional\create_assoc
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*/
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const create_assoc = '\Functional\create_assoc';
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/**
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* @see \Functional\curry
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*/
@@ -169,6 +174,11 @@ final class Functional
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*/
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const identical = '\Functional\identical';
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/**
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* @see \Functional\is_unary
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*/
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const is_unary = '\Functional\is_unary';
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/**
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* @see \Functional\if_else
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*/

‎tests/Functional/CreateAssocTest.php‎

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<?php
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/**
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* Copyright (C) 2019 by Jesus Franco Martinez <tezcatl@fedoraproject.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
6+
* of this software and associated documentation files (the "Software"), to deal
7+
* in the Software without restriction, including without limitation the rights
8+
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9+
* copies of the Software, and to permit persons to whom the Software is
10+
* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
13+
* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16+
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18+
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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namespace Functional\Tests;
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use Functional\Functional;
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use function Functional\create_assoc;
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use function Apantle\HashMapper\hashMapper;
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class CreateAssocTest extends AbstractTestCase
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{
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public function testBasicCreateAssoc()
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{
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$input = new \DateTimeImmutable();
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$expected = [
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'targetA' => $input,
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'targetB' => $input
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];
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$actual = create_assoc([
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'targetA' => Functional::id,
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'targetB' => Functional::id,
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])($input);
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$this->assertEquals($expected, $actual);
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$this->assertEquals($input->format('U'), $actual['targetA']->format('U'));
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$this->assertEquals($input->format('U'), $actual['targetB']->format('U'));
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}
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public function testExpectsTameme()
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{
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$input = [ 1, 2, 3 ];
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$expected = [
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'targetA' => [ 4 => 1, 5 => 2, 6 => 3 ],
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'targetB' => [ 5 => 2 ]
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];
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$tameme = new class extends \ArrayObject {};
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$actual = create_assoc([
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'targetA' => function ($member, $input = null, $tameme) {
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$build = \array_reduce($member, function ($accum, $num) {
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$accum[$num + 3] = $num;
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return $accum;
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}, []);
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$tameme['prev'] = $build;
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return $build;
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},
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'targetB' => function ($member, $input, $tameme) {
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$prev = $tameme['prev'];
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$build = [];
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foreach($prev as $key => $val) {
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if($key % 2 !== 0) {
77+
$build[$key] = $val;
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}
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}
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return $build;
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}
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], $tameme)($input);
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84+
$this->assertEquals($expected, $actual);
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}
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public function testReceivesOptionalArgument()
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{
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$input = [
90+
'vendor' => 'tzkmx',
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'utility' => 'unfold'
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];
93+
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$expected = [
95+
'vendorName' => 'tzkmx',
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'vendorLen' => 5,
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'serialized' => 'a:2:{s:6:"vendor";s:5:"tzkmx";s:7:"utility";s:6:"unfold";}',
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'utility' => 'unfold',
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'utilLen' => 6,
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'package' => [ 'tzkmx/unfold' => $input ]
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];
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$tameme = new class extends \ArrayObject {};
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$actual = hashMapper([
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'vendor' => [ '...', create_assoc([
107+
'vendorName' => 'strval',
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'vendorLen' => 'strlen',
109+
'serialized' => function ($member, $hash, $tameme) {
110+
$tameme['name'] = $member;
111+
return \serialize($hash);
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}
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], $tameme)
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],
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'utility' => [ '...', create_assoc([
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'utility' => 'strval',
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'utilLen' => 'strlen',
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'package' => function ($member, $hash, $tameme) {
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$name = $tameme['name'];
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return [ "$name/$member" => $hash ];
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}
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], $tameme)
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]
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])($input);
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$this->assertEquals($expected, $actual);
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}
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}

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