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<?php |
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/** |
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* @package Cadmium\Framework\Template |
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* @author Anton Romanov |
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* @copyright Copyright (c) 2015-2017, Anton Romanov |
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* @link http://cadmium-cms.com |
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*/ |
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namespace Template { |
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use Language, Str, Template; |
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class Block extends Group { |
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private $contents = '', $enabled = true; |
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private $blocks = [], $loops = [], $widgets = [], $variables = [], $phrases = []; |
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/** |
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* Set an empty template widget if was not set before |
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*/ |
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private function registerWidget(string $name) { |
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if (false === Template::getWidget($name)) Template::setWidget($name, new Block); |
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} |
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/** |
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* Parse structures |
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*/ |
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private function parseStructures() { |
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preg_match_all(REGEX_TEMPLATE_STRUCTURE, $this->contents, $matches); |
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foreach ($matches[0] as $key => $match) { |
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$toggle = (($matches[1][$key] === '!') ? 'disable' : 'enable'); |
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$type = $matches[2][$key]; $name = $matches[3][$key]; $contents = ($matches[4][$key] ?? ''); |
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if (!preg_match(REGEX_TEMPLATE_COMPONENT_NAME, $name)) continue; |
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$this->contents = str_replace($match, ('{ ' . $type . ':' . $name . ' / }'), $this->contents); |
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if ($type === 'block') $this->blocks[$name] = (new Block($contents))->$toggle(); |
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else if ($type === 'for') $this->loops[$name] = new Loop($contents); |
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else if ($type === 'widget') $this->registerWidget($this->widgets[] = $name); |
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} |
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} |
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/** |
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* Parse elementaries |
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*/ |
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private function parseElementaries() { |
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$variables = ['pattern' => REGEX_TEMPLATE_VARIABLE, 'stack' => &$this->variables ]; |
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$phrases = ['pattern' => REGEX_TEMPLATE_PHRASE, 'stack' => &$this->phrases ]; |
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foreach ([$variables, $phrases] as $elementaries) { |
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preg_match_all($elementaries['pattern'], $this->contents, $matches); |
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foreach ($matches[1] as $index => $name) { |
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if (!preg_match(REGEX_TEMPLATE_COMPONENT_NAME, $name)) continue; |
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$elementaries['stack'][$name] = false; |
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} |
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} |
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} |
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/** |
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* Build the block contents |
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*/ |
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protected function buildContents() : string { |
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$insertions = []; |
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# Process blocks |
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foreach ($this->blocks as $name => $block) { |
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$insertions['{ block:' . $name . ' / }'] = $block->getContents(); |
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} |
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# Process loops |
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foreach ($this->loops as $name => $loop) { |
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$insertions['{ for:' . $name . ' / }'] = $loop->getContents(); |
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} |
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# Process widgets |
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foreach ($this->widgets as $name) { |
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$widget = Template::getWidget($name); |
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$contents = ((false !== $widget) ? $widget->getContents() : ''); |
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$insertions['{ widget:' . $name . ' / }'] = $contents; |
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} |
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# Process variables |
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foreach ($this->variables as $name => $value) { |
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$value = ((false === $value) ? Template::getGlobal($name) : $value); |
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$insertions['$' . $name . '$'] = Str::formatOutput($value); |
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} |
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# Process phrases |
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foreach ($this->phrases as $name => $value) { |
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$value = Language::get($name); |
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$insertions['%' . $name . '%'] = Str::formatOutput($value); |
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} |
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# Process insertions |
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$contents = str_replace(array_keys($insertions), array_values($insertions), $this->contents); |
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# ------------------------ |
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return $contents; |
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} |
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/** |
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* Constructor |
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*/ |
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public function __construct(string $contents = '') { |
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$this->contents = $contents; |
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$this->parseStructures(); $this->parseElementaries(); |
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} |
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/** |
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* Cloner |
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*/ |
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public function __clone() { |
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foreach ($this->blocks as $name => $block) $this->blocks[$name] = clone $block; |
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foreach ($this->loops as $name => $loop) $this->loops[$name] = clone $loop; |
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foreach ($this->items as $name => $item) $this->items[$name] = clone $item; |
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} |
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/** |
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* Set a block, a loop, or a variable |
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* |
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* @return Template\Block : the current block object |
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*/ |
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public function set(string $name, $component) : Block { |
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if ($component instanceof Block) $this->setBlock($name, $component); |
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else if (is_array($component)) $this->setLoop($name, $component); |
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else if (is_scalar($component)) $this->setVar($name, $component); |
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# ------------------------ |
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return $this; |
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} |
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/** |
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* Set multiple components (blocks, loops, or variables) |
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* |
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* @return Template\Block : the current block object |
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*/ |
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public function setArray(array $components) : Block { |
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foreach ($components as $name => $component) $this->set($name, $component); |
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return $this; |
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} |
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/** |
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* Set a block |
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* |
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* @return Template\Block : the current block object |
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*/ |
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public function setBlock(string $name, Block $block) : Block { |
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if (isset($this->blocks[$name])) $this->blocks[$name] = $block; |
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return $this; |
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} |
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/** |
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* Set a loop |
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* |
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* @return Template\Block : the current block object |
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*/ |
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public function setLoop(string $name, array $items) : Block { |
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if (isset($this->loops[$name])) $this->loops[$name]->setItems($items); |
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return $this; |
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} |
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/** |
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* Set a variable |
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* |
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* @return Template\Block : the current block object |
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*/ |
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public function setVar(string $name, string $value) : Block { |
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if (isset($this->variables[$name])) $this->variables[$name] = $value; |
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return $this; |
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} |
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/** |
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* Get a block, a loop, or a variable |
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* |
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* @return Template\Block|Template\Loop|string|false : the component or false if the component does not exist |
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*/ |
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public function get(string $name) { |
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return ($this->blocks[$name] ?? $this->loops[$name] ?? $this->variables[$name] ?? false); |
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} |
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/** |
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* Get a block. It's recommended to use this method instead of magic getter to avoid an error on getting nonexistent block |
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* |
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* @return Template\Block : the block or an empty block if the block does not exist |
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*/ |
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public function getBlock(string $name) : Block { |
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return ($this->blocks[$name] ?? new Block); |
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} |
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/** |
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* Get the blocks list |
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*/ |
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public function getBlocks() : array { |
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return $this->blocks; |
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} |
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/** |
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* Get a loop. It's recommended to use this method instead of magic getter to avoid an error on getting nonexistent loop |
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* |
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* @return Template\Loop : the loop or an empty loop if the loop does not exist |
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*/ |
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public function getLoop(string $name) : Loop { |
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return ($this->loops[$name] ?? new Loop); |
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} |
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/** |
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* Get the loops list |
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*/ |
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public function getLoops() : array { |
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return $this->loops; |
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} |
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/** |
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* Get a variable |
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* |
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* @return string|false : the value or false if the variable does not exist |
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*/ |
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public function getVar(string $name) { |
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return ($this->variables[$name] ?? false); |
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} |
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/** |
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* Get the variable list |
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*/ |
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public function getVars() : array { |
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return $this->variables; |
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} |
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/** |
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* Get the block contents |
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*/ |
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public function getContents() : string { |
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if (!$this->enabled) return ''; |
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# Lock the block |
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$this->enabled = false; |
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# Generate contents |
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$contents = ((0 === $this->count) ? $this->buildContents() : parent::getContents()); |
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# Unlock the block |
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$this->enabled = true; |
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# ------------------------ |
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return $contents; |
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} |
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/** |
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* Disable the block |
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* |
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* @return Template\Block : the current block object |
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*/ |
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public function disable() : Block { |
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$this->enabled = false; |
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return $this; |
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} |
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/** |
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* Enable the block |
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* |
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* @return Template\Block : the current block object |
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*/ |
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public function enable() : Block { |
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$this->enabled = true; |
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return $this; |
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} |
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/** |
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* Check if the block is enabled |
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*/ |
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public function isEnabled() : bool { |
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return $this->enabled; |
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} |
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/** |
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* An alias for the set method |
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*/ |
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public function __set(string $name, $component) : Block { |
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return $this->set($name, $component); |
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} |
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/** |
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* An alias for the get method |
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*/ |
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public function __get(string $name) { |
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return $this->get($name); |
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} |
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/** |
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* Check if a component exists |
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*/ |
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public function __isset(string $name) : bool { |
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return (isset($this->blocks[$name]) || isset($this->loops[$name]) || isset($this->variables[$name])); |
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} |
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} |
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} |
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