Add and use new parser/transformer classes

Classes:
* Parsers\ArgumentParser
* Parsers\EmoticonParser
* Parsers\MarkdownParser

Interfaces:
* Parsers\ParserInterface

1 files changed, 72 insertions, 0 deletions

diff --git a/core/namespace/Parsers/EmoticonParser.php b/core/namespace/Parsers/EmoticonParser.php
new file mode 100644
index 0000000..4e035c8
--- /dev/null
+++ b/core/namespace/Parsers/EmoticonParser.php
@@ -0,0 +1,72 @@
+<?php
+namespace Parsers;
+use Application;
+
+class EmoticonParser implements ParserInterface {
+	private $Language;
+
+	#===========================================================================
+	# Initialize
+	#===========================================================================
+	public function __construct() {
+		$this->Language = Application::getLanguage();
+	}
+
+	#===========================================================================
+	# Get emoticons with their explanations
+	#===========================================================================
+	public function getEmoticons(): array {
+		$Language = $this->Language;
+
+		return [
+			html_entity_decode('&#x1F60A;') => $Language->text('emoticon_1F60A'),
+			html_entity_decode('&#x1F61E;') => $Language->text('emoticon_1F61E'),
+			html_entity_decode('&#x1F603;') => $Language->text('emoticon_1F603'),
+			html_entity_decode('&#x1F61B;') => $Language->text('emoticon_1F61B'),
+			html_entity_decode('&#x1F632;') => $Language->text('emoticon_1F632'),
+			html_entity_decode('&#x1F609;') => $Language->text('emoticon_1F609'),
+			html_entity_decode('&#x1F622;') => $Language->text('emoticon_1F622'),
+			html_entity_decode('&#x1F610;') => $Language->text('emoticon_1F610'),
+			html_entity_decode('&#x1F635;') => $Language->text('emoticon_1F635'),
+			html_entity_decode('&#x1F612;') => $Language->text('emoticon_1F612'),
+			html_entity_decode('&#x1F60E;') => $Language->text('emoticon_1F60E'),
+			html_entity_decode('&#x1F61F;') => $Language->text('emoticon_1F61F'),
+			html_entity_decode('&#x1F602;') => $Language->text('emoticon_1F602'),
+			html_entity_decode('&#x1F604;') => $Language->text('emoticon_1F604'),
+		];
+	}
+
+	#===========================================================================
+	# Parse occurring emoticons (*without* duplicates)
+	#===========================================================================
+	public function parse(string $text): array {
+		$emoticon_data = $this->getEmoticons();
+		$emoticon_list = array_keys($emoticon_data);
+		$emoticon_list = implode('|', $emoticon_list);
+
+		preg_match_all("#($emoticon_list)#", $text, $matches);
+
+		foreach($matches[1] as $emoticon) {
+			$emoticons[$emoticon] = $emoticon_data[$emoticon];
+		}
+
+		return $emoticons ?? [];
+	}
+
+	#===========================================================================
+	# Wrap emoticons inside a titled span element
+	#===========================================================================
+	public function transform(string $text): string {
+		$emoticon_data = $this->getEmoticons();
+		$emoticon_list = array_keys($emoticon_data);
+		$emoticon_list = implode('|', $emoticon_list);
+
+		# TODO: Do not wrap emoticons if they occur inside a code block
+		return preg_replace_callback("#($emoticon_list)#", function($matches)
+		use($emoticon_data) {
+			$emoticon = $matches[1];
+			$explanation = $emoticon_data[$emoticon];
+			return sprintf('<span title="%s">%s</span>', $explanation, $emoticon);
+		}, $text);
+	}
+}