140 lines
3.7 KiB
PHP
140 lines
3.7 KiB
PHP
<?php
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class template_engine
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{
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public static $base_block = "BASE";
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public $blocks = array();
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public $templates = array();
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private $block_pattern = '/\w*/';
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private $block_pattern_chars = '[\w,_,-]*';
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private $block_pattern_prefix = '{{ ';
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private $block_pattern_suffix = ' }}';
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private $source_files = array();
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private $template_folder = "./templates/";
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private function init_templates(array $source_files) : void
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{
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foreach ($source_files as $name => $source)
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{
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$this->templates[$name] = file_get_contents($source);
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}
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}
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private function discover_templates(string $template_folder) : void
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{
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foreach (glob($template_folder."*") as $file)
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{
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$info = pathinfo($file);
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$template_id = strtoupper(str_replace("-", "_", $info["filename"]));
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$this->source_files[$template_id] = $file;
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}
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}
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public function __construct()
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{
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$this->block_pattern = '/' . $this->block_pattern_prefix . $this->block_pattern_chars . $this->block_pattern_suffix . '/';
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$this->discover_templates($this->template_folder);
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$this->init_templates($this->source_files);
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$this->new();
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}
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public function new() : void
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{
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$this->blocks = array();
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foreach ($this->templates as $key => $template)
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{
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$this->blocks[$key] = $template;
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}
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// $this->blocks[self::$base_block] = $this->templates[self::$base_block];
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}
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public function get_block_names() : array
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{
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$all_matches = array();
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foreach ($this->blocks as $block)
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{
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$matches = array();
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preg_match_all($this->block_pattern, $block, $matches);
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$all_matches = array_merge($all_matches, $matches[0]);
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}
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$block_names = array();
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foreach (array_unique($all_matches) as $match)
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{
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$block_name = str_replace([$this->block_pattern_prefix, $this->block_pattern_suffix], "", $match);
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$block_names[$block_name] = array_key_exists($block_name, $this->blocks) ? true : false;
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}
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return $block_names;
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}
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public function set_block_template(string $block, string $template) : void
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{
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$this->blocks[$block] = $this->templates[$template];
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}
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public function set_block(string $block, string $content) : void
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{
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$this->blocks[$block] = $content;
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}
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public function append_block(string $block, string $content) : void
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{
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if (empty($this->blocks[$block])) $this->blocks[$block] = "";
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$this->blocks[$block] .= $content;
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}
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public function append_block_template(string $block, string $template) : void
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{
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if (empty($this->blocks[$block])) $this->blocks[$block] = "";
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$this->blocks[$block] .= $this->templates[$template];
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}
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public function append_built_block(string $block, string $block_name) : void
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{
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$this->append_block($block, $this->build_block($block_name));
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}
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public function append_argumented_block(string $block, string $block_name, array $args) : void
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{
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$this->append_block($block, $this->build_argumented_block($block_name, $args));
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}
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public function build_argumented_block(string $block, array $args) : string
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{
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foreach ($args as $key => $value) $this->set_block($key, $value);
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return $this->build_block($block);
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}
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public function build_block(string $block) : string
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{
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$matches = array();
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$html = $this->blocks[$block];
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$from = array();
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$to = array();
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foreach ($this->get_block_names() as $block_name => $has_block)
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{
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$from[] = $this->block_pattern_prefix . $block_name . $this->block_pattern_suffix;
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if ($has_block) $to[] = $this->blocks[$block_name];
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else $to[] = "";
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}
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while (preg_match_all($this->block_pattern, $html) > 0)
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{
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$html = str_replace($from, $to, $html);
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}
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return $html;
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}
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public function get_raw_html() : string
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{
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return $this->build_block(self::$base_block);
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}
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public function get_html() : string
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{
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$strip = [ "\t" ];
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return str_replace($strip, "", $this->get_raw_html());
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}
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} |