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<?php |
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/* |
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* Copyright 2011 Johannes M. Schmitt <[email protected]> |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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namespace TwigJs\Compiler\Expression; |
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use TwigJs\JsCompiler; |
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use TwigJs\TypeCompilerInterface; |
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class ArrayCompiler implements TypeCompilerInterface |
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{ |
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public function getType() |
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{ |
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return 'Twig_Node_Expression_Array'; |
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} |
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public function compile(JsCompiler $compiler, \Twig_NodeInterface $node) |
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{ |
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if (!$node instanceof \Twig_Node_Expression_Array) { |
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throw new \RuntimeException( |
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sprintf('$node must be an instanceof of \Expression_Array, but got "%s".', get_class($node)) |
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); |
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} |
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$pairs = $this->getKeyValuePairs($node); |
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if ($isList = $this->isList($pairs)) { |
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$compiler->raw('['); |
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} elseif ($hasDynamicKeys = $this->hasDynamicKeys($pairs)) { |
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$compiler->raw('twig.createObj('); |
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} else { |
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$compiler->raw('{'); |
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} |
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$first = true; |
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foreach ($pairs as $pair) { |
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if (!$first) { |
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$compiler->raw(', '); |
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} |
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$first = false; |
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if ($isList) { |
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$compiler->subcompile($pair['value']); |
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} elseif ($hasDynamicKeys) { |
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$compiler |
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->subcompile($pair['key']) |
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->raw(', ') |
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->subcompile($pair['value']) |
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; |
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} else { |
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$compiler |
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->subcompile($pair['key']) |
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->raw(': ') |
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->subcompile($pair['value']) |
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; |
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} |
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} |
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if ($isList) { |
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$compiler->raw(']'); |
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} elseif ($hasDynamicKeys) { |
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$compiler->raw(')'); |
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} else { |
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$compiler->raw('}'); |
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} |
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} |
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private function hasDynamicKeys(array $pairs) |
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{ |
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foreach ($pairs as $pair) { |
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if (!$pair['key'] instanceof \Twig_Node_Expression_Constant) { |
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return true; |
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} |
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} |
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return false; |
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} |
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private function isList(array $pairs) |
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{ |
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for ($i=0,$c=count($pairs); $i<$c; $i++) { |
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if (!$pairs[$i]['key'] instanceof \Twig_Node_Expression_Constant) { |
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return false; |
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} |
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if ($pairs[$i]['key']->getAttribute('value') !== $i) { |
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return false; |
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} |
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} |
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return true; |
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} |
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private function getKeyValuePairs(\Twig_Node $node) |
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{ |
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$pairs = array(); |
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foreach (array_chunk($node->getIterator()->getArrayCopy(), 2) as $pair) { |
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$pairs[] = array( |
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'key' => $pair[0], |
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'value' => $pair[1], |
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); |
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} |
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return $pairs; |
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} |
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} |
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ForkNetwork /
twig.js
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: