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<?php |
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/** |
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* @author Andrew Coulton <[email protected]> |
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* @copyright 2015 inGenerator Ltd |
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* @license http://kohanaframework.org/license |
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*/ |
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namespace Ingenerator\KohanaView\TemplateManager; |
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use Ingenerator\KohanaView\TemplateCompiler; |
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use Ingenerator\KohanaView\TemplateManager; |
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/** |
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* Manages compilation of templates from view files located within the cascading file system. This allows extension |
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* modules or applications to provide their own templates that are used in place of defaults provided by other modules. |
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* |
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* Templates will be dynamically compiled and cached to disk: |
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* * If the recompile_always option is TRUE, then once for every execution |
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* * If the recompile_always option is FALSE, then only if the compiled template does not yet exist |
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* |
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* @package Ingenerator\KohanaView\TemplateManager |
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*/ |
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class CFSTemplateManager implements TemplateManager |
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{ |
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/** |
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* @var string |
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*/ |
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protected $cache_dir; |
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/** |
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* @var CFSWrapper |
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*/ |
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protected $cascading_files; |
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/** |
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* @var array |
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*/ |
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protected $compiled_paths = []; |
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/** |
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* @var TemplateCompiler |
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*/ |
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protected $compiler; |
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/** |
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* @var boolean |
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*/ |
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protected $recompile_always; |
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/** |
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* Valid options: |
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* * cache_dir => the path where compiled templates will be cached |
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* * recompile_always => whether to recompile each template on every execution, |
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* |
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* @param TemplateCompiler $compiler |
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* @param array $options |
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* @param CFSWrapper $cascading_files |
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*/ |
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public function __construct(TemplateCompiler $compiler, array $options, CFSWrapper $cascading_files = NULL) |
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{ |
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$this->cascading_files = $cascading_files ?: new CFSWrapper; |
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$this->compiler = $compiler; |
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$this->cache_dir = trim($options['cache_dir'], '/'); |
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$this->recompile_always = \Arr::get($options, 'recompile_always', FALSE); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getPath($template_name) |
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{ |
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$compiled_path = $this->cache_dir.'/'.$template_name.'.php'; |
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if ($this->isCompileRequired($compiled_path)) { |
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$source = $this->requireSourceFileContent($template_name); |
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$compiled = $this->compiler->compile($source); |
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$this->writeFile($compiled_path, $compiled); |
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$this->compiled_paths[$compiled_path] = TRUE; |
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} |
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return $compiled_path; |
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} |
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/** |
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* @param string $compiled_path |
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* |
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* @return bool |
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*/ |
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protected function isCompileRequired($compiled_path) |
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{ |
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if ($this->recompile_always AND ! isset($this->compiled_paths[$compiled_path])) { |
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return TRUE; |
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} |
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return ! file_exists($compiled_path); |
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} |
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/** |
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* @param string $template_name |
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* |
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* @return string |
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*/ |
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protected function requireSourceFileContent($template_name) |
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{ |
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if ( ! $source_file = $this->cascading_files->find_file('views', $template_name)) { |
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throw new \InvalidArgumentException("Cannot find template source file 'views/$template_name'"); |
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} |
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return file_get_contents($source_file); |
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} |
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/** |
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* @param string $compiled_path |
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* @param string $compiled |
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*/ |
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protected function writeFile($compiled_path, $compiled) |
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{ |
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$this->ensureWriteableDirectory(dirname($compiled_path)); |
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file_put_contents($compiled_path, $compiled); |
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} |
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/** |
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* @param string $path |
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*/ |
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protected function ensureWriteableDirectory($path) |
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{ |
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if (is_dir($path)) { |
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if ( ! is_writeable($path)) { |
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throw new \RuntimeException("Cannot write to compiled template path '$path'"); |
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} |
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} else { |
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if ( ! mkdir($path, 0777, TRUE)) { |
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throw new \RuntimeException("Cannot create template cache directory in '$path'"); |
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} |
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} |
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} |
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} |
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ingenerator /
kohana-view
PHP has two types of connecting operators (logical operators, and boolean operators):
and&&or||The difference between these is the order in which they are executed. In most cases, you would want to use a boolean operator like
&&, or||.Let’s take a look at a few examples:
Logical Operators are used for Control-Flow
One case where you explicitly want to use logical operators is for control-flow such as this:
Since
dieintroduces problems of its own, f.e. it makes our code hardly testable, and prevents any kind of more sophisticated error handling; you probably do not want to use this in real-world code. Unfortunately, logical operators cannot be combined withthrowat this point:These limitations lead to logical operators rarely being of use in current PHP code.