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<?php
/**
* @package FOF
* @copyright Copyright (c)2010-2022 Nicholas K. Dionysopoulos / Akeeba Ltd
* @license GNU General Public License version 3, or later
*/
namespace FOF40\View;
defined('_JEXEC') || die;
use FOF40\Container\Container;
use FOF40\Model\Model;
use FOF40\View\Engine\EngineInterface;
use FOF40\View\Engine\PhpEngine;
use FOF40\View\Exception\CannotGetName;
use FOF40\View\Exception\EmptyStack;
use FOF40\View\Exception\ModelNotFound;
use FOF40\View\Exception\UnrecognisedExtension;
use Joomla\CMS\Language\Text;
/**
* Class View
*
* A generic MVC view implementation
*
* @property-read \FOF40\Input\Input $input The input object (magic __get returns the Input from the Container)
*/
class View
{
public $baseurl;
/**
* Current or most recently performed task.
* Currently public, it should be reduced to protected in the future
*
* @var string
*/
public $task;
/**
* The mapped task that was performed.
* Currently public, it should be reduced to protected in the future
*
* @var string
*/
public $doTask;
/**
* The name of the view
*
* @var array
*/
protected $name;
/**
* Registered models
*
* @var array
*/
protected $modelInstances = [];
/**
* The default model
*
* @var string
*/
protected $defaultModel;
/**
* Layout name
*
* @var string
*/
protected $layout = 'default';
/**
* Layout template
*
* @var string
*/
protected $layoutTemplate = '_';
/**
* The set of search directories for view templates
*
* @var array
*/
protected $templatePaths = [];
/**
* The name of the default template source file.
*
* @var string
*/
protected $template;
/**
* The output of the template script.
*
* @var string
*/
protected $output;
/**
* A cached copy of the configuration
*
* @var array
*/
protected $config = [];
/**
* The container attached to this view
*
* @var Container
*/
protected $container;
/**
* The object used to locate view templates in the filesystem
*
* @var ViewTemplateFinder
*/
protected $viewFinder;
/**
* Used when loading template files to avoid variable scope issues
*
* @var null
*/
protected $_tempFilePath;
/**
* Should I run the pre-render step?
*
* @var boolean
*/
protected $doPreRender = true;
/**
* Should I run the post-render step?
*
* @var boolean
*/
protected $doPostRender = true;
/**
* Maps view template extensions to view engine classes
*
* @var array
*/
protected $viewEngineMap = [
'.blade.php' => 'FOF40\\View\\Engine\\BladeEngine',
'.php' => 'FOF40\\View\\Engine\\PhpEngine',
];
/**
* All of the finished, captured sections.
*
* @var array
*/
protected $sections = [];
/**
* The stack of in-progress sections.
*
* @var array
*/
protected $sectionStack = [];
/**
* The number of active rendering operations.
*
* @var int
*/
protected $renderCount = 0;
/**
* Aliases of view templates. For example:
*
* array('userProfile' => 'site://com_foobar/users/profile')
*
* allows you to do something like $this->loadAnyTemplate('userProfile') to display the frontend view template
* site://com_foobar/users/profile. You can also alias one view template with another, e.g.
* 'site://com_something/users/profile' => 'admin://com_foobar/clients/record'
*
* @var array
*/
protected $viewTemplateAliases = [];
/**
* Constructor.
*
* The $config array can contain the following overrides:
* name string The name of the view (defaults to the view class name)
* template_path string The path of the layout directory
* layout string The layout for displaying the view
* viewFinder ViewTemplateFinder The object used to locate view templates in the filesystem
* viewEngineMap array Maps view template extensions to view engine classes
*
* @param Container $container The container we belong to
* @param array $config The configuration overrides for the view
*
* @return View
*/
public function __construct(Container $container, array $config = [])
{
$this->container = $container;
$this->config = $config;
// Get the view name
if (isset($this->config['name']))
{
$this->name = $this->config['name'];
}
$this->name = $this->getName();
// Set the default template search path
if (array_key_exists('template_path', $this->config))
{
// User-defined dirs
$this->setTemplatePath($this->config['template_path']);
}
else
{
$this->setTemplatePath($this->container->thisPath . '/View/' . ucfirst($this->name) . '/tmpl');
}
// Set the layout
if (array_key_exists('layout', $this->config))
{
$this->setLayout($this->config['layout']);
}
// Apply the viewEngineMap
if (isset($config['viewEngineMap']))
{
// If the overrides are a string convert it to an array first.
if (!is_array($config['viewEngineMap']))
{
$temp = explode(',', $config['viewEngineMap']);
$config['viewEngineMap'] = [];
foreach ($temp as $assignment)
{
$parts = explode('=>', $assignment, 2);
if (count($parts) != 2)
{
continue;
}
$parts = array_map(function ($x) {
return trim($x);
}, $parts);
$config['viewEngineMap'][$parts[0]] = $parts[1];
}
}
/**
* We want to always have a sane fallback to plain .php template files at the end of the view engine stack.
* For this to happen to we need to remove it from the current stack, disallow overriding it in the
* viewEngineMap overrides, merge the overrides and then add the fallback at the very end of the stack.
*
* In previous versions we didn't do that which had two side effects:
* 1. It was no longer a fallback, it was in the middle of the stack
* 2. Any new template engines using a .something.php extension wouldn't work, see
* https://github.com/akeeba/fof/issues/694
*/
// Do not allow overriding the fallback .php handler
if (isset($config['viewEngineMap']['.php']))
{
unset ($config['viewEngineMap']['.php']);
}
// Temporarily remove the fallback .php handler
$phpHandler = $this->viewEngineMap['.php'] ?? PhpEngine::class;
unset ($this->viewEngineMap['.php']);
// Add the overrides
$this->viewEngineMap = array_merge($this->viewEngineMap, $config['viewEngineMap']);
// Push the fallback .php handler to the end of the view engine map stack
$this->viewEngineMap = array_merge($this->viewEngineMap, [
'.php' => $phpHandler
]);
}
// Set the ViewFinder
$this->viewFinder = $this->container->factory->viewFinder($this);
if (isset($config['viewFinder']) && !empty($config['viewFinder']) && is_object($config['viewFinder']) && ($config['viewFinder'] instanceof ViewTemplateFinder))
{
$this->viewFinder = $config['viewFinder'];
}
// Apply the registered view template extensions to the view finder
$this->viewFinder->setExtensions(array_keys($this->viewEngineMap));
// Apply the base URL
$this->baseurl = $this->container->platform->URIbase();
}
/**
* Magic get method. Handles magic properties:
* $this->input mapped to $this->container->input
*
* @param string $name The property to fetch
*
* @return mixed|null
*/
public function __get($name)
{
// Handle $this->input
if ($name == 'input')
{
return $this->container->input;
}
// Property not found; raise error
$trace = debug_backtrace();
trigger_error(
'Undefined property via __get(): ' . $name .
' in ' . $trace[0]['file'] .
' on line ' . $trace[0]['line'],
E_USER_NOTICE);
return null;
}
/**
* Method to get the view name
*
* The model name by default parsed using the classname, or it can be set
* by passing a $config['name'] in the class constructor
*
* @return string The name of the model
*
* @throws \Exception
*/
public function getName()
{
if (empty($this->name))
{
$r = null;
if (!preg_match('/(.*)\\\\View\\\\(.*)\\\\(.*)/i', get_class($this), $r))
{
throw new CannotGetName;
}
$this->name = $r[2];
}
return $this->name;
}
/**
* Escapes a value for output in a view script.
*
* @param mixed $var The output to escape.
*
* @return mixed The escaped value.
*/
public function escape($var)
{
return htmlspecialchars($var, ENT_COMPAT, 'UTF-8');
}
/**
* Method to get data from a registered model or a property of the view
*
* @param string $property The name of the method to call on the Model or the property to get
* @param string $default The default value [optional]
* @param string $modelName The name of the Model to reference [optional]
*
* @return mixed The return value of the method
*/
public function get($property, $default = null, $modelName = null)
{
$model = is_null($modelName) ? $this->defaultModel : $modelName;
// First check to make sure the model requested exists
if (isset($this->modelInstances[$model]))
{
// Model exists, let's build the method name
$method = 'get' . ucfirst($property);
// Does the method exist?
if (method_exists($this->modelInstances[$model], $method))
{
// The method exists, let's call it and return what we get
$result = $this->modelInstances[$model]->$method();
return $result;
}
$result = $this->modelInstances[$model]->$property();
if (is_null($result))
{
return $default;
}
return $result;
}
if (@isset($this->$property))
{
return $this->$property;
}
return $default;
}
/**
* Returns a named Model object
*
* @param string $name The Model name. If null we'll use the modelName
* variable or, if it's empty, the same name as
* the Controller
*
* @return Model The instance of the Model known to this Controller
*/
public function getModel($name = null)
{
if (!empty($name))
{
$modelName = $name;
}
elseif (!empty($this->defaultModel))
{
$modelName = $this->defaultModel;
}
else
{
$modelName = $this->name;
}
if (!array_key_exists($modelName, $this->modelInstances))
{
throw new ModelNotFound($modelName ?? '', $this->name ?? '');
}
return $this->modelInstances[$modelName];
}
/**
* Pushes the default Model to the View
*
* @param Model $model The model to push
*/
public function setDefaultModel(Model &$model)
{
$name = $model->getName();
$this->setDefaultModelName($name);
$this->setModel($this->defaultModel, $model);
}
/**
* Set the name of the Model to be used by this View
*
* @param string $modelName The name of the Model
*
* @return void
*/
public function setDefaultModelName($modelName)
{
$this->defaultModel = $modelName;
}
/**
* Pushes a named model to the View
*
* @param string $modelName The name of the Model
* @param Model $model The actual Model object to push
*
* @return void
*/
public function setModel($modelName, Model &$model)
{
$this->modelInstances[$modelName] = $model;
}
/**
* Overrides the default method to execute and display a template script.
* Instead of loadTemplate is uses loadAnyTemplate.
*
* @param string $tpl The name of the template file to parse
*
* @return boolean True on success
*
* @throws \Exception When the layout file is not found
*/
public function display($tpl = null)
{
$this->initialise();
$eventName = 'onBefore' . ucfirst($this->doTask);
$this->triggerEvent($eventName, [$tpl]);
$preRenderResult = '';
if ($this->doPreRender)
{
@ob_start();
$this->preRender();
$preRenderResult = @ob_get_contents();
@ob_end_clean();
}
$templateResult = $this->loadTemplate($tpl);
$eventName = 'onAfter' . ucfirst($this->doTask);
$this->triggerEvent($eventName, [$tpl]);
if (is_object($templateResult) && ($templateResult instanceof \Exception))
{
throw $templateResult;
}
echo $preRenderResult . $templateResult;
if ($this->doPostRender)
{
$this->postRender();
}
return true;
}
/**
* Get the layout.
*
* @return string The layout name
*/
public function getLayout()
{
return $this->layout;
}
/**
* Sets the layout name to use
*
* @param string $layout The layout name or a string in format <template>:<layout file>
*
* @return string Previous value.
*/
public function setLayout($layout)
{
$previous = $this->layout;
if (is_null($layout))
{
$layout = 'default';
}
if (strpos($layout, ':') === false)
{
$this->layout = $layout;
}
else
{
// Convert parameter to array based on :
$temp = explode(':', $layout);
$this->layout = $temp[1];
// Set layout template
$this->layoutTemplate = $temp[0];
}
return $previous;
}
/**
* Our function uses loadAnyTemplate to provide smarter view template loading.
*
* @param string $tpl The name of the template file to parse
* @param boolean $strict Should we use strict naming, i.e. force a non-empty $tpl?
*
* @return mixed A string if successful, otherwise an Exception
*/
public function loadTemplate($tpl = null, $strict = false)
{
$result = '';
$uris = $this->viewFinder->getViewTemplateUris([
'component' => $this->container->componentName,
'view' => $this->getName(),
'layout' => $this->getLayout(),
'tpl' => $tpl,
'strictTpl' => $strict,
]);
foreach ($uris as $uri)
{
try
{
$result = $this->loadAnyTemplate($uri);
break;
}
catch (\Exception $e)
{
$result = $e;
}
}
if ($result instanceof \Exception)
{
$this->container->platform->showErrorPage($result);
}
return $result;
}
/**
* Loads a template given any path. The path is in the format componentPart://componentName/viewName/layoutName,
* for example
* site:com_example/items/default
* admin:com_example/items/default_subtemplate
* auto:com_example/things/chair
* any:com_example/invoices/printpreview
*
* @param string $uri The template path
* @param array $forceParams A hash array of variables to be extracted in the local scope of the
* template file
* @param callable|null $callback A method to post-process the 3ναluα+3d view template (I use leetspeak here
* because of bad quality hosts with broken scanners)
* @param bool $noOverride If true we will not load Joomla! template overrides. Useful when you want
* the template overrides to extend the original view template.
*
* @return string The output of the template
*
* @throws \Exception When the layout file is not found
*/
public function loadAnyTemplate(string $uri = '', array $forceParams = [], ?callable $callback = null, bool $noOverride = false)
{
if (isset($this->viewTemplateAliases[$uri]))
{
$uri = $this->viewTemplateAliases[$uri];
}
$layoutTemplate = $this->getLayoutTemplate();
$extraPaths = [];
if (!empty($this->templatePaths))
{
$extraPaths = $this->templatePaths;
}
// First get the raw view template path
$path = $this->viewFinder->resolveUriToPath($uri, $layoutTemplate, $extraPaths, $noOverride);
// Now get the parsed view template path
$this->_tempFilePath = $this->getEngine($path)->get($path, $forceParams);
// We will keep track of the amount of views being rendered so we can flush
// the section after the complete rendering operation is done. This will
// clear out the sections for any separate views that may be rendered.
$this->incrementRender();
// Get the processed template
$contents = $this->processTemplate($forceParams);
// Once we've finished rendering the view, we'll decrement the render count
// so that each sections get flushed out next time a view is created and
// no old sections are staying around in the memory of an environment.
$this->decrementRender();
$response = isset($callback) ? $callback($this, $contents) : null;
if (!is_null($response))
{
$contents = $response;
}
// Once we have the contents of the view, we will flush the sections if we are
// done rendering all views so that there is nothing left hanging over when
// another view gets rendered in the future by the application developer.
$this->flushSectionsIfDoneRendering();
return $contents;
}
/**
* Increment the rendering counter.
*
* @return void
*/
public function incrementRender()
{
$this->renderCount++;
}
/**
* Decrement the rendering counter.
*
* @return void
*/
public function decrementRender()
{
$this->renderCount--;
}
/**
* Check if there are no active render operations.
*
* @return bool
*/
public function doneRendering()
{
return $this->renderCount == 0;
}
/**
* Go through a data array and render a sub-template against each record (think master-detail views). This is
* accessible through Blade templates as @each
*
* @param string $viewTemplate The view template to use for each subitem, format
* componentPart://componentName/viewName/layoutName
* @param array $data The array of data you want to render. It can be a DataModel\Collection, array,
* ...
* @param string $eachItemName How to call each item in the loaded sub-template (passed through $forceParams)
* @param string $empty What to display if the array is empty
*
* @return string
*/
public function renderEach($viewTemplate, $data, $eachItemName, $empty = 'raw|')
{
$result = '';
// If is actually data in the array, we will loop through the data and append
// an instance of the partial view to the final result HTML passing in the
// iterated value of this data array, allowing the views to access them.
if (count($data) > 0)
{
foreach ($data as $key => $value)
{
$data = ['key' => $key, $eachItemName => $value];
$result .= $this->loadAnyTemplate($viewTemplate, $data);
}
return $result;
}
if (starts_with($empty, 'raw|'))
{
$result = substr($empty, 4);
return $result;
}
if (starts_with($empty, 'text|'))
{
$result = Text::_(substr($empty, 5));
return $result;
}
return $this->loadAnyTemplate($empty);
}
/**
* Start injecting content into a section.
*
* @param string $section
* @param string $content
*
* @return void
*/
public function startSection($section, $content = '')
{
if ($content === '')
{
if (ob_start())
{
$this->sectionStack[] = $section;
}
}
else
{
$this->extendSection($section, $content);
}
}
/**
* Stop injecting content into a section and return its contents.
*
* @return string
*/
public function yieldSection()
{
return $this->yieldContent($this->stopSection());
}
/**
* Stop injecting content into a section.
*
* @param bool $overwrite
*
* @return string
*/
public function stopSection($overwrite = false)
{
if (empty($this->sectionStack))
{
// Let's close the output buffering
ob_get_clean();
throw new EmptyStack();
}
$last = array_pop($this->sectionStack);
if ($overwrite)
{
$this->sections[$last] = ob_get_clean();
}
else
{
$this->extendSection($last, ob_get_clean());
}
return $last;
}
/**
* Stop injecting content into a section and append it.
*
* @return string
*/
public function appendSection()
{
if (empty($this->sectionStack))
{
// Let's close the output buffering
ob_get_clean();
throw new EmptyStack();
}
$last = array_pop($this->sectionStack);
if (isset($this->sections[$last]))
{
$this->sections[$last] .= ob_get_clean();
}
else
{
$this->sections[$last] = ob_get_clean();
}
return $last;
}
/**
* Get the string contents of a section.
*
* @param string $section
* @param string $default
*
* @return string
*/
public function yieldContent($section, $default = '')
{
$sectionContent = $default;
if (isset($this->sections[$section]))
{
$sectionContent = $this->sections[$section];
}
return str_replace('@parent', '', $sectionContent);
}
/**
* Flush all of the section contents.
*
* @return void
*/
public function flushSections()
{
$this->sections = [];
$this->sectionStack = [];
}
/**
* Flush all of the section contents if done rendering.
*
* @return void
*/
public function flushSectionsIfDoneRendering()
{
if ($this->doneRendering())
{
$this->flushSections();
}
}
/**
* Get the layout template.
*
* @return string The layout template name
*/
public function getLayoutTemplate()
{
return $this->layoutTemplate;
}
/**
* Load a helper file
*
* @param string $helperClass The last part of the name of the helper
* class.
*
* @return void
*
* @deprecated 3.0 Just use the class in your code. That's what the autoloader is for.
*/
public function loadHelper($helperClass = null)
{
// Get the helper class name
$className = '\\' . $this->container->getNamespacePrefix() . 'Helper\\' . ucfirst($helperClass);
// This trick autoloads the helper class. We can't instantiate it as
// helpers are (supposed to be) abstract classes with static method
// interfaces.
class_exists($className);
}
/**
* Returns a reference to the container attached to this View
*
* @return Container
*/
public function &getContainer()
{
return $this->container;
}
public function getTask()
{
return $this->task;
}
/**
* @param string $task
*
* @return $this This for chaining
*/
public function setTask($task)
{
$this->task = $task;
return $this;
}
public function getDoTask()
{
return $this->doTask;
}
/**
* @param string $task
*
* @return $this This for chaining
*/
public function setDoTask($task)
{
$this->doTask = $task;
return $this;
}
/**
* Sets the pre-render flag
*
* @param boolean $value True to enable the pre-render step
*
* @return void
*/
public function setPreRender($value)
{
$this->doPreRender = $value;
}
/**
* Sets the post-render flag
*
* @param boolean $value True to enable the post-render step
*
* @return void
*/
public function setPostRender($value)
{
$this->doPostRender = $value;
}
/**
* Add an alias for a view template.
*
* @param string $viewTemplate Existing view template, in the format
* componentPart://componentName/viewName/layoutName
* @param string $alias The alias of the view template (any string will do)
*
* @return void
*/
public function alias($viewTemplate, $alias)
{
$this->viewTemplateAliases[$alias] = $viewTemplate;
}
/**
* Add a JS script file to the page generated by the CMS.
*
* There are three combinations of defer and async (see http://www.w3schools.com/tags/att_script_defer.asp):
* * $defer false, $async true: The script is executed asynchronously with the rest of the page
* (the script will be executed while the page continues the parsing)
* * $defer true, $async false: The script is executed when the page has finished parsing.
* * $defer false, $async false. (default) The script is loaded and executed immediately. When it finishes
* loading the browser continues parsing the rest of the page.
*
* When you are using $defer = true there is no guarantee about the load order of the scripts. Whichever
* script loads first will be executed first. The order they appear on the page is completely irrelevant.
*
* @param string $uri A path definition understood by parsePath, e.g. media://com_example/js/foo.js
* @param string $version (optional) Version string to be added to the URL
* @param string $type MIME type of the script
* @param boolean $defer Adds the defer attribute, see above
* @param boolean $async Adds the async attribute, see above
*
* @return $this Self, for chaining
*/
public function addJavascriptFile($uri, $version = null, $type = 'text/javascript', $defer = false, $async = false)
{
// Add an automatic version if $version is null. For no version parameter pass an empty string to $version.
if (is_null($version))
{
$version = $this->container->mediaVersion;
}
$this->container->template->addJS($uri, $defer, $async, $version, $type);
return $this;
}
/**
* Adds an inline JavaScript script to the page header
*
* @param string $script The script content to add
* @param string $type The MIME type of the script
*
* @return $this Self, for chaining
*/
public function addJavascriptInline($script, $type = 'text/javascript')
{
$this->container->template->addJSInline($script, $type);
return $this;
}
/**
* Add a CSS file to the page generated by the CMS
*
* @param string $uri A path definition understood by parsePath, e.g. media://com_example/css/foo.css
* @param string $version (optional) Version string to be added to the URL
* @param string $type MIME type of the stylesheeet
* @param string $media Media target definition of the style sheet, e.g. "screen"
* @param array $attribs Array of attributes
*
* @return $this Self, for chaining
*/
public function addCssFile($uri, $version = null, $type = 'text/css', $media = null, $attribs = [])
{
// Add an automatic version if $version is null. For no version parameter pass an empty string to $version.
if (is_null($version))
{
$version = $this->container->mediaVersion;
}
$this->container->template->addCSS($uri, $version, $type, $media, $attribs);
return $this;
}
/**
* Adds an inline stylesheet (inline CSS) to the page header
*
* @param string $css The stylesheet content to add
* @param string $type The MIME type of the script
*
* @return $this Self, for chaining
*/
public function addCssInline($css, $type = 'text/css')
{
$this->container->template->addCSSInline($css, $type);
return $this;
}
/**
* Sets an entire array of search paths for templates or resources.
*
* @param mixed $path The new search path, or an array of search paths. If null or false, resets to the current
* directory only.
*
* @return void
*/
protected function setTemplatePath($path)
{
// Clear out the prior search dirs
$this->templatePaths = [];
// Actually add the user-specified directories
$this->addTemplatePath($path);
// Set the alternative template search dir
$templatePath = JPATH_THEMES;
$fallback = $templatePath . '/' . $this->container->platform->getTemplate() . '/html/' . $this->container->componentName . '/' . $this->name;
$this->addTemplatePath($fallback);
// Get extra directories through event dispatchers
$extraPathsResults = $this->container->platform->runPlugins('onGetViewTemplatePaths', [
$this->container->componentName,
$this->getName(),
]);
if (!is_array($extraPathsResults))
{
return;
}
if (empty($extraPathsResults))
{
return;
}
foreach ($extraPathsResults as $somePaths)
{
if (!empty($somePaths))
{
foreach ($somePaths as $aPath)
{
$this->addTemplatePath($aPath);
}
}
}
}
/**
* Adds to the search path for templates and resources.
*
* @param mixed $path The directory or stream, or an array of either, to search.
*
* @return void
*/
protected function addTemplatePath($path)
{
// Just force to array
$path = (array) $path;
// Loop through the path directories
foreach ($path as $dir)
{
// No surrounding spaces allowed!
$dir = trim($dir);
// Add trailing separators as needed
if (substr($dir, -1) != DIRECTORY_SEPARATOR)
{
// Directory
$dir .= DIRECTORY_SEPARATOR;
}
// Add to the top of the search dirs
array_unshift($this->templatePaths, $dir);
}
}
/**
* Append content to a given section.
*
* @param string $section
* @param string $content
*
* @return void
*/
protected function extendSection($section, $content)
{
if (isset($this->sections[$section]))
{
$content = str_replace('@parent', $content, $this->sections[$section]);
}
$this->sections[$section] = $content;
}
/**
* Evaluates the template described in the _tempFilePath property
*
* @param array $forceParams Forced parameters
*
* @return string
* @throws \Exception
*/
protected function processTemplate(array &$forceParams)
{
// If the engine returned raw content, return the raw content immediately
if ($this->_tempFilePath['type'] == 'raw')
{
return $this->_tempFilePath['content'];
}
if (substr($this->_tempFilePath['content'], 0, 4) == 'raw|')
{
return substr($this->_tempFilePath['content'], 4);
}
$obLevel = ob_get_level();
ob_start();
// We'll process the contents of the view inside a try/catch block so we can
// flush out any stray output that might get out before an error occurs or
// an exception is thrown. This prevents any partial views from leaking.
try
{
$this->includeTemplateFile($forceParams);
}
catch (\Exception $e)
{
$this->handleViewException($e, $obLevel);
}
return ob_get_clean();
}
/**
* Handle a view exception.
*
* @param \Exception $e The exception to handle
* @param int $obLevel The target output buffering level
*
* @return void
*
* @throws $e
*/
protected function handleViewException(\Exception $e, $obLevel)
{
while (ob_get_level() > $obLevel)
{
ob_end_clean();
}
$message = $e->getMessage() . ' (View template: ' . realpath($this->_tempFilePath['content']) . ')';
$newException = new \ErrorException($message, 0, 1, $e->getFile(), $e->getLine(), $e);
throw $newException;
}
/**
* Get the appropriate view engine for the given view template path.
*
* @param string $path The path of the view template
*
* @return EngineInterface
*
* @throws UnrecognisedExtension
*/
protected function getEngine($path)
{
foreach ($this->viewEngineMap as $extension => $engine)
{
if (substr($path, -strlen($extension)) == $extension)
{
return new $engine($this);
}
}
throw new UnrecognisedExtension($path);
}
/**
* Get the extension used by the view file.
*
* @param string $path
*
* @return string
*/
protected function getExtension($path)
{
$extensions = array_keys($this->viewEngineMap);
return array_first($extensions, function ($key, $value) use ($path) {
return ends_with($path, $value);
});
}
/**
* Triggers an object-specific event. The event runs both locally –if a suitable method exists– and through the
* Joomla! plugin system. A true/false return value is expected. The first false return cancels the event.
*
* EXAMPLE
* Component: com_foobar, Object name: item, Event: onBeforeSomething, Arguments: array(123, 456)
* The event calls:
* 1. $this->onBeforeSomething(123, 456)
* 2. Joomla! plugin event onComFoobarViewItemBeforeSomething($this, 123, 456)
*
* @param string $event The name of the event, typically named onPredicateVerb e.g. onBeforeKick
* @param array $arguments The arguments to pass to the event handlers
*
* @return bool
*/
protected function triggerEvent($event, array $arguments = [])
{
$result = true;
// If there is an object method for this event, call it
if (method_exists($this, $event))
{
$result = $this->{$event}(...$arguments);
}
if ($result === false)
{
return false;
}
// All other event handlers live outside this object, therefore they need to be passed a reference to this
// objects as the first argument.
array_unshift($arguments, $this);
// If we have an "on" prefix for the event (e.g. onFooBar) remove it and stash it for later.
$prefix = '';
if (substr($event, 0, 2) == 'on')
{
$prefix = 'on';
$event = substr($event, 2);
}
// Get the component/model prefix for the event
$prefix .= 'Com' . ucfirst($this->container->bareComponentName) . 'View';
$prefix .= ucfirst($this->getName());
// The event name will be something like onComFoobarItemsBeforeSomething
$event = $prefix . $event;
// Call the Joomla! plugins
$results = $this->container->platform->runPlugins($event, $arguments);
return !in_array(false, $results, true);
}
/**
* Runs before rendering the view template, echoing HTML to put before the view template's generated HTML.
*
* This method runs **before** executing the OnBefore* view events.
*
* @return void
*/
protected function initialise(): void
{
}
/**
* Runs before rendering the view template, echoing HTML to put before the view template's generated HTML.
*
* This method runs **after** executing the OnBefore* view events.
*
* @return void
*/
protected function preRender(): void
{
// You need to implement this in children classes
}
/**
* Runs after rendering the view template, echoing HTML to put after the
* view template's generated HTML
*
* @return void
*/
protected function postRender(): void
{
// You need to implement this in children classes
}
/**
* This method makes sure the current scope isn't polluted with variables when including a view template
*
* @param array $forceParams Forced parameters
*
* @return void
*/
private function includeTemplateFile(array &$forceParams)
{
// Extract forced parameters
if (!empty($forceParams))
{
extract($forceParams);
}
include $this->_tempFilePath['content'];
}
}