With empty input return an empty node to skip the full block

[packbundle] / Twig / PackTokenParser.php

diff --git a/Twig/PackTokenParser.php b/Twig/PackTokenParser.php
index 5a21f7ef2d06ca2c0bf49ae4b14c5f697858e756..d301a89192134e00027627c335c157ac5dd0c2a4 100644 (file)
--- a/Twig/PackTokenParser.php
+++ b/Twig/PackTokenParser.php
@@ -1,103 +1,172 @@
 <?php
 <?php

-// src/Rapsys/PackBundle/Twig/PackTokenParser.php
+

 namespace Rapsys\PackBundle\Twig;
 
 use Symfony\Component\HttpKernel\Config\FileLocator;
 namespace Rapsys\PackBundle\Twig;
 
 use Symfony\Component\HttpKernel\Config\FileLocator;

-use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\Asset\PackageInterface;
+use Twig\Error\Error;
+use Twig\Node\Expression\AssignNameExpression;
+use Twig\Node\Node;
+use Twig\Node\SetNode;
+use Twig\Node\TextNode;
+use Twig\Token;
+use Twig\TokenParser\AbstractTokenParser;

 
 

-class PackTokenParser extends \Twig_TokenParser {
+class PackTokenParser extends AbstractTokenParser {
+       //The tag name

        private $tag;
 
        /**
        private $tag;
 
        /**

-        * Constructor.
+        * Constructor

         *
         *

-        * @param class         $fileLocator            The FileLocator instance
-        * @param class         $assetsPackages         The Assets Packages instance
-        * @param string        $prefix                 The prefix path
-        * @param string        $tag                    The tag name
-        * @param string        $output                 The default output string
-        * @param string        $tool                   The tool path
+        * @param class         $locator        The FileLocator instance
+        * @param class         $package        The Assets Package instance
+        * @param string        $config         The config path
+        * @param string        $tag            The tag name
+        * @param string        $output         The default output string
+        * @param array         $filters        The default filters array

         */
         */

-       public function __construct(FileLocator $fileLocator, ContainerInterface $containerInterface, $prefix, $tag, $output, $tool = null) {
-               $this->fileLocator              = $fileLocator;
-               $this->containerInterface       = $containerInterface;
-               $this->prefix                   = $prefix;
-               $this->tag                      = $tag;
-               $this->output                   = $output;
-               $this->tool                     = $tool;
+       public function __construct(FileLocator $locator, PackageInterface $package, $config, $tag, $output, $filters) {
+               //Save locator
+               $this->locator = $locator;
+
+               //Save assets package
+               $this->package = $package;
+
+               //Set name
+               $this->name = $config['name'];
+
+               //Set scheme
+               $this->scheme = $config['scheme'];
+
+               //Set timeout
+               $this->timeout = $config['timeout'];
+
+               //Set agent
+               $this->agent = $config['agent'];
+
+               //Set redirect
+               $this->redirect = $config['redirect'];
+
+               //Set tag
+               $this->tag = $tag;
+
+               //Set output
+               $this->output = $output;
+
+               //Set filters
+               $this->filters = $filters;

        }
 
        }
 

+       /**
+        * Get the tag name
+        */

        public function getTag() {
                return $this->tag;
        }
 
        public function getTag() {
                return $this->tag;
        }
 

-       public function parse(\Twig_Token $token) {
+       /**
+        * Parse the token
+        *
+        * @param class $token The \Twig\Token instance
+        *
+        * @return class The PackNode
+        *
+        * @todo see if we can't add a debug mode behaviour
+        *
+        * If twig.debug or env=dev (or rapsys_pack.config.debug?) is set, it should be possible to loop on each input
+        * and process the captured body without applying requested filter.
+        *
+        * @todo list:
+        * - detect debug mode
+        * - retrieve fixe link from input s%@(Name)Bundle/Resources/public(/somewhere/file.ext)%/bundles/\L\1\E\2%
+        * - for each inputs:
+        *   - generate a set asset_url=x
+        *   - generate a body
+        */
+       public function parse(Token $token) {

                $parser = $this->parser;
                $stream = $this->parser->getStream();
 
                $parser = $this->parser;
                $stream = $this->parser->getStream();
 

-               $inputs = array();
-               $filters = array();
-               $name = 'asset_url';
+               $inputs = [];
+               $name = $this->name;

                $output = $this->output;
                $output = $this->output;

+               $filters = $this->filters;

 
                $content = '';
 
 
                $content = '';
 

-               while (!$stream->test(\Twig_Token::BLOCK_END_TYPE)) {
-                       if ($stream->test(\Twig_Token::STRING_TYPE)) {
-                               // '@jquery', 'js/src/core/*', 'js/src/extra.js'
+               //Process the token block until end
+               while (!$stream->test(Token::BLOCK_END_TYPE)) {
+                       //The files to process
+                       if ($stream->test(Token::STRING_TYPE)) {
+                               //'somewhere/somefile.(css,img,js)' 'somewhere/*' '@jquery'

                                $inputs[] = $stream->next()->getValue();
                                $inputs[] = $stream->next()->getValue();

-                       } elseif ($stream->test(\Twig_Token::NAME_TYPE, 'filter')) {
-                               // filter='yui_js'
+                       //The filters token
+                       } elseif ($stream->test(Token::NAME_TYPE, 'filters')) {
+                               //filter='yui_js'

                                $stream->next();
                                $stream->next();

-                               $stream->expect(\Twig_Token::OPERATOR_TYPE, '=');
-                               $filters = array_merge($filters, array_filter(array_map('trim', explode(',', $stream->expect(\Twig_Token::STRING_TYPE)->getValue()))));
-                       } elseif ($stream->test(\Twig_Token::NAME_TYPE, 'output')) {
-                               // output='js/packed/*.js' OR output='js/core.js'
+                               $stream->expect(Token::OPERATOR_TYPE, '=');
+                               $filters = array_merge($filters, array_filter(array_map('trim', explode(',', $stream->expect(Token::STRING_TYPE)->getValue()))));
+                       //The output token
+                       } elseif ($stream->test(Token::NAME_TYPE, 'output')) {
+                               //output='js/packed/*.js' OR output='js/core.js'

                                $stream->next();
                                $stream->next();

-                               $stream->expect(\Twig_Token::OPERATOR_TYPE, '=');
-                               $output = $stream->expect(\Twig_Token::STRING_TYPE)->getValue();
-                       } elseif ($stream->test(\Twig_Token::NAME_TYPE, 'name')) {
-                               // name='core_js'
+                               $stream->expect(Token::OPERATOR_TYPE, '=');
+                               $output = $stream->expect(Token::STRING_TYPE)->getValue();
+                       //The name token
+                       } elseif ($stream->test(Token::NAME_TYPE, 'name')) {
+                               //name='core_js'

                                $stream->next();
                                $stream->next();

-                               $stream->expect(\Twig_Token::OPERATOR_TYPE, '=');
-                               $name = $stream->expect(\Twig_Token::STRING_TYPE)->getValue();
+                               $stream->expect(Token::OPERATOR_TYPE, '=');
+                               $name = $stream->expect(Token::STRING_TYPE)->getValue();
+                       //Unexpected token

                        } else {
                                $token = $stream->getCurrent();
                        } else {
                                $token = $stream->getCurrent();

-                               throw new \Twig_Error_Syntax(sprintf('Unexpected token "%s" of value "%s"', \Twig_Token::typeToEnglish($token->getType()), $token->getValue()), $token->getLine(), $stream->getFilename());
+                               throw new Error(sprintf('Unexpected token "%s" of value "%s"', Token::typeToEnglish($token->getType()), $token->getValue()), $token->getLine(), $stream->getSourceContext());

                        }
                }
 
                        }
                }
 

-               $stream->expect(\Twig_Token::BLOCK_END_TYPE);
+               //Process end block
+               $stream->expect(Token::BLOCK_END_TYPE);
+
+               //Process body
+               $body = $this->parser->subparse([$this, 'testEndTag'], true);

 
 

-               $body = $this->parser->subparse(array($this, 'testEndTag'), true);
+               //Process end block
+               $stream->expect(Token::BLOCK_END_TYPE);

 
 

-               $stream->expect(\Twig_Token::BLOCK_END_TYPE);
+               //TODO: debug mode should be inserted here before the output variable is rewritten

 
                //Replace star with sha1
                if (($pos = strpos($output, '*')) !== false) {
 
                //Replace star with sha1
                if (($pos = strpos($output, '*')) !== false) {

-                       #XXX: assetic code: substr(sha1(serialize($inputs).serialize($filters).serialize($options)), 0, 7)
+                       //XXX: assetic use substr(sha1(serialize($inputs).serialize($filters).serialize($options)), 0, 7)

                        $output = substr($output, 0, $pos).sha1(serialize($inputs).serialize($filters)).substr($output, $pos + 1);
                }
 
                        $output = substr($output, 0, $pos).sha1(serialize($inputs).serialize($filters)).substr($output, $pos + 1);
                }
 

-               //Deal with inputs
-               //TODO: support @jquery ? or is it supported already with fileLocator->locate ?
+               //Process inputs

                for($k = 0; $k < count($inputs); $k++) {
                        //Deal with generic url
                        if (strpos($inputs[$k], '//') === 0) {
                for($k = 0; $k < count($inputs); $k++) {
                        //Deal with generic url
                        if (strpos($inputs[$k], '//') === 0) {

-                               //TODO: set this as a parameter (scheme)
-                               #if ($containerInterface->hasParameter('rapsys_pack.default_scheme')) {
-                               #       if ($parameters = $containerInterface->getParameter('rapsys_pack.default_scheme')) {
-                               $inputs[$k] = 'https:'.$inputs[$k];
+                               //Fix url
+                               $inputs[$k] = $this->scheme.substr($inputs[$k], 2);

                        //Deal with non url path
                        } elseif (strpos($inputs[$k], '://') === false) {
                                //Check if we have a bundle path
                                if ($inputs[$k][0] == '@') {
                        //Deal with non url path
                        } elseif (strpos($inputs[$k], '://') === false) {
                                //Check if we have a bundle path
                                if ($inputs[$k][0] == '@') {

+                                       //Check that we have a / separator between bundle name and path

                                        if (($pos = strpos($inputs[$k], '/')) === false) {
                                        if (($pos = strpos($inputs[$k], '/')) === false) {

-                                               throw new \Twig_Error_Syntax(sprintf('Invalid input path "%s"', $inputs[$k]), $token->getLine(), $stream->getFilename());
+                                               //TODO: add a @jquery magic feature ?
+                                               /*
+                                               header('Content-Type: text/plain');
+                                               var_dump($inputs);
+                                               if ($inputs[0] == '@jquery') {
+                                                       exit;
+                                               }
+                                               */
+                                               throw new Error(sprintf('Invalid input path "%s"', $inputs[$k]), $token->getLine(), $stream->getSourceContext());

                                        }
                                        }

-                                       //Extract prefix
-                                       #$inputs[$k] = $this->kernel->locateResource(substr($inputs[$k], 0, $pos)).substr($inputs[$k], $pos + 1);
-                                       $inputs[$k] = $this->fileLocator->locate(substr($inputs[$k], 0, $pos)).substr($inputs[$k], $pos + 1);
+                                       //Resolve bundle prefix
+                                       $inputs[$k] = $this->locator->locate(substr($inputs[$k], 0, $pos)).substr($inputs[$k], $pos + 1);

                                }
                                //Deal with globs
                                if (strpos($inputs[$k], '*') !== false || (($a = strpos($inputs[$k], '{')) !== false && ($b = strpos($inputs[$k], ',', $a)) !== false && strpos($inputs[$k], '}', $b) !== false)) {
                                }
                                //Deal with globs
                                if (strpos($inputs[$k], '*') !== false || (($a = strpos($inputs[$k], '{')) !== false && ($b = strpos($inputs[$k], ',', $a)) !== false && strpos($inputs[$k], '}', $b) !== false)) {


@@ -105,8 +174,9 @@ class PackTokenParser extends \Twig_TokenParser {
                                        $replacement = glob($inputs[$k], GLOB_NOSORT|GLOB_BRACE);
                                        //Check that these are working files
                                        foreach($replacement as $input) {
                                        $replacement = glob($inputs[$k], GLOB_NOSORT|GLOB_BRACE);
                                        //Check that these are working files
                                        foreach($replacement as $input) {

+                                               //Check that it's a file

                                                if (!is_file($input)) {
                                                if (!is_file($input)) {

-                                                       throw new \Twig_Error_Syntax(sprintf('Input path "%s" from "%s" is not a file', $input, $inputs[$k]), $token->getLine(), $stream->getFilename());
+                                                       throw new Error(sprintf('Input path "%s" from "%s" is not a file', $input, $inputs[$k]), $token->getLine(), $stream->getSourceContext());

                                                }
                                        }
                                        //Replace with glob path
                                                }
                                        }
                                        //Replace with glob path


@@ -115,99 +185,149 @@ class PackTokenParser extends \Twig_TokenParser {
                                        $k += count($replacement) - 1;
                                //Check that it's a file
                                } elseif (!is_file($inputs[$k])) {
                                        $k += count($replacement) - 1;
                                //Check that it's a file
                                } elseif (!is_file($inputs[$k])) {

-                                       throw new \Twig_Error_Syntax(sprintf('Input path "%s" is not a file', $inputs[$k]), $token->getLine(), $stream->getFilename());
+                                       throw new Error(sprintf('Input path "%s" is not a file', $inputs[$k]), $token->getLine(), $stream->getSourceContext());

                                }
                        }
                }
 
                                }
                        }
                }
 

-               //Retrieve files content
-               foreach($inputs as $input) {
-                       //Set timeout
-                       $ctx = stream_context_create(
-                               array(
-                                       'http' => array(
-                                               //TODO: set this as a parameter (scheme)
-                                               #if ($containerInterface->hasParameter('rapsys_pack.input_timeout')) {
-                                               #       if ($parameters = $containerInterface->getParameter('rapsys_pack.input_timeout')) {
-                                               'timeout' => 5
-                                       )
-                               )
-                       );
-                       //Try to retrieve content
-                       if (($data = file_get_contents($input, false, $ctx)) === false) {
-                               throw new \Twig_Error_Syntax(sprintf('Unable to retrieve input path "%s"', $input), $token->getLine(), $stream->getFilename());
+               //Init context
+               $ctx = stream_context_create(
+                       [
+                               'http' => [
+                                       'timeout' => $this->timeout,
+                                       'user_agent' => $this->agent,
+                                       'redirect' => $this->redirect,
+                               ]
+                       ]
+               );
+
+               //Check inputs
+               if (!empty($inputs)) {
+                       //Retrieve files content
+                       foreach($inputs as $input) {
+                               //Try to retrieve content
+                               if (($data = file_get_contents($input, false, $ctx)) === false) {
+                                       throw new Error(sprintf('Unable to retrieve input path "%s"', $input), $token->getLine(), $stream->getSourceContext());
+                               }
+                               //Append content
+                               $content .= $data;

                        }
                        }

-                       //Append content
-                       $content .= $data;
+               } else {
+                       //Trigger error about empty inputs ?
+                       //XXX: There may be a legitimate case where we want an empty file or an error, feel free to contact the author in such case
+                       #throw new Error('Empty inputs token', $token->getLine(), $stream->getSourceContext());
+
+                       //Send an empty node without inputs
+                       return new Node();

                }
 
                }
 

-               //Use tool
-               if (!empty($this->tool) && is_executable($this->tool)) {
-                       $descriptorSpec = array(
-                               0 => array('pipe', 'r'),
-                               1 => array('pipe', 'w'),
-                               2 => array('pipe', 'w')
-                       );
-                       if (is_resource($proc = proc_open($this->tool, $descriptorSpec, $pipes))) {
-                               //Set stderr as non blocking
-                               stream_set_blocking($pipes[2], 0);
-                               //Send content to stdin
-                               fwrite($pipes[0], $content);
-                               //Close stdin
-                               fclose($pipes[0]);
-                               //Read content from stdout
-                               if ($stdout = stream_get_contents($pipes[1])) {
-                                       $content = $stdout;
-                               }
-                               //Close stdout
-                               fclose($pipes[1]);
-                               //Read content from stderr
-                               if ($stderr = stream_get_contents($pipes[2])) {
-                                       throw new \Twig_Error_Syntax(sprintf('Got unexpected strerr for %s: %s', $this->tool, $stderr), $token->getLine(), $stream->getFilename());
-                               }
-                               //Close stderr
-                               fclose($pipes[2]);
-                               //Close process
-                               if ($ret = proc_close($proc)) {
-                                       throw new \Twig_Error_Syntax(sprintf('Got unexpected non zero return code %s: %d', $this->tool, $ret), $token->getLine(), $stream->getFilename());
+               //Check filters
+               if (!empty($filters)) {
+                       //Apply all filters
+                       foreach($filters as $filter) {
+                               //Init args
+                               $args = [$stream->getSourceContext(), $token->getLine()];
+                               //Check if args is available
+                               if (!empty($filter['args'])) {
+                                       //Append args if provided
+                                       $args += $filter['args'];

                                }
                                }

+                               //Init reflection
+                               $reflection = new \ReflectionClass($filter['class']);
+                               //Set instance args
+                               $tool = $reflection->newInstanceArgs($args);
+                               //Process content
+                               $content = $tool->process($content);
+                               //Remove object
+                               unset($tool, $reflection);

                        }
                        }

+               } else {
+                       //Trigger error about empty filters ?
+                       //XXX: There may be a legitimate case where we want only a merged file or an error, feel free to contact the author in such case
+                       #throw new Error('Empty filters token', $token->getLine(), $stream->getSourceContext());
+               }
+
+               //Retrieve asset uri
+               //XXX: this path is the merge of services.assets.path_package.arguments[0] and rapsys_pack.output.(css,img,js)
+               if (($outputUrl = $this->package->getUrl($output)) === false) {
+                       throw new Error(sprintf('Unable to get url for asset: %s', $output), $token->getLine(), $stream->getSourceContext());

                }
 
                }
 

-               //Create output dir on demand
-               if (!is_dir($parent = $dir = dirname($this->prefix.$output))) {
-                       //XXX: set as 0777, symfony umask (0022) will reduce rights (0755)
-                       mkdir($dir, 0777, true);
+               //Check if we have a bundle path
+               if ($output[0] == '@') {
+                       //Check that we have a / separator between bundle name and path
+                       if (($pos = strpos($output, '/')) === false) {
+                               throw new Error(sprintf('Invalid output path "%s"', $output), $token->getLine(), $stream->getSourceContext());
+                       }
+                       //Resolve bundle prefix
+                       $output = $this->locator->locate(substr($output, 0, $pos)).substr($output, $pos + 1);
+               }
+
+               //Create output dir if not present
+               if (!is_dir($dir = dirname($output))) {
+                       try {
+                               //XXX: set as 0777, symfony umask (0022) will reduce rights (0755)
+                               if (mkdir($dir, 0777, true) === false) {
+                                       throw new \Exception();
+                               }
+                       } catch (\Exception $e) {
+                               throw new Error(sprintf('Output directory "%s" do not exists and unable to create it', $dir), $token->getLine(), $stream->getSourceContext(), $e);
+                       }

                }
 
                //Send file content
                }
 
                //Send file content

-               //TODO: see if atomic rotation is really necessary ?
-               //XXX: version management is done via rapsys_pack configuration atomic should be useless
-               //TODO: implement asset versionning or re-use internal functions
-               if (file_put_contents($this->prefix.$output.'.new', $content) === false) {
-                       throw new \Twig_Error_Syntax(sprintf('Unable to write to: %s', $prefix.$output.'.new'), $token->getLine(), $stream->getFilename());
+               //XXX: to avoid partial content in reverse cache we use atomic rotation write, unlink and move
+               try {
+                       if (file_put_contents($output.'.new', $content) === false) {
+                               throw new \Exception();
+                       }
+               } catch(\Exception $e) {
+                       throw new Error(sprintf('Unable to write to: %s', $output.'.new'), $token->getLine(), $stream->getSourceContext(), $e);

                }
 
                //Remove old file
                }
 
                //Remove old file

-               if (is_file($this->prefix.$output) && unlink($this->prefix.$output) === false) {
-                       throw new \Twig_Error_Syntax(sprintf('Unable to unlink: %s', $prefix.$output), $token->getLine(), $stream->getFilename());
+               if (is_file($output)) {
+                       try {
+                               if (unlink($output) === false) {
+                                       throw new \Exception();
+                               }
+                       } catch (\Exception $e) {
+                               throw new Error(sprintf('Unable to unlink: %s', $output), $token->getLine(), $stream->getSourceContext(), $e);
+                       }

                }
 
                //Rename it
                }
 
                //Rename it

-               if (rename($this->prefix.$output.'.new', $this->prefix.$output) === false) {
-                       throw new \Twig_Error_Syntax(sprintf('Unable to rename: %s to %s', $prefix.$output.'.new', $prefix.$output), $token->getLine(), $stream->getFilename());
+               try {
+                       if (rename($output.'.new', $output) === false) {
+                               throw new \Exception();
+                       }
+               } catch (\Exception $e) {
+                       throw new Error(sprintf('Unable to rename: %s to %s', $output.'.new', $output), $token->getLine(), $stream->getSourceContext(), $e);

                }
 
                }
 

-               //Retrieve asset uri
-               if (($output = $this->containerInterface->get('assets.packages')->getUrl($output, 'rapsys_pack')) === false) {
-                       throw new \Twig_Error_Syntax(sprintf('Unable to get url for asset: %s with package %s', $output, 'rapsys_pack'), $token->getLine(), $stream->getFilename());
-               }
+               //Set name in context key
+               $ref = new AssignNameExpression($name, $token->getLine());

 
 

-               //Send pack node
-               return new PackNode(array('value' => $body), array('inputs' => $inputs, 'filters' => $filters, 'name' => $name, 'output' => $output), $token->getLine(), $this->getTag());
+               //Set output in context value
+               $value = new TextNode($outputUrl, $token->getLine());
+
+               //Send body with context set
+               return new Node([
+                       //This define name in twig template by prepending $context['<name>'] = '<output>';
+                       new SetNode(true, $ref, $value, $token->getLine(), $this->getTag()),
+                       //The tag captured body
+                       $body
+               ]);

        }
 
        }
 

-       public function testEndTag(\Twig_Token $token) {
-               return $token->test(array('end'.$this->getTag()));
+       /**
+        * Test for tag end
+        *
+        * @param class $token The \Twig\Token instance
+        *
+        * @return bool
+        */
+       public function testEndTag(Token $token) {
+               return $token->test(['end'.$this->getTag()]);

        }
 }
        }
 }