breaklineparser: First version

Some markdown provides such as GitHub, uses \r\n to create <br>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

include/maddy/breaklineparser.h

@@ -0,0 +1,51 @@
+/*
+ * This project is licensed under the MIT license. For more information see the
+ * LICENSE file.
+ */
+#pragma once
+
+// -----------------------------------------------------------------------------
+
+#include <string>
+#include <regex>
+
+#include "maddy/lineparser.h"
+
+// -----------------------------------------------------------------------------
+
+namespace maddy {
+
+// -----------------------------------------------------------------------------
+
+/**
+ * BreakLineParser
+ *
+ * @class
+ */
+class BreakLineParser : public LineParser
+{
+public:
+  /**
+   * Parse
+   *
+   * From Markdown: `text\r\n text`
+   *
+   * To HTML: `text<br> text`
+   *
+   * @method
+   * @param {std::string&} line The line to interpret
+   * @return {void}
+   */
+  void
+  Parse(std::string& line) override
+  {
+    static std::regex re(R"((\r\n|\r))");
+    static std::string replacement = "<br>";
+
+    line = std::regex_replace(line, re, replacement);
+  }
+}; // class BreakLineParser
+
+// -----------------------------------------------------------------------------
+
+} // namespace maddy

include/maddy/parser.h

@@ -22,6 +22,7 @@
 #include "maddy/unorderedlistparser.h"
 
 // LineParser
+#include "maddy/breaklineparser.h"
 #include "maddy/emphasizedparser.h"
 #include "maddy/imageparser.h"
 #include "maddy/inlinecodeparser.h"
@@ -54,7 +55,8 @@ public:
    * @method
    */
   Parser()
-    : emphasizedParser(std::make_shared<EmphasizedParser>())
+    : breakLineParser(std::make_shared<BreakLineParser>())
+    , emphasizedParser(std::make_shared<EmphasizedParser>())
     , imageParser(std::make_shared<ImageParser>())
     , inlineCodeParser(std::make_shared<InlineCodeParser>())
     , italicParser(std::make_shared<ItalicParser>())
@@ -111,6 +113,7 @@ public:
   }
 
 private:
+  std::shared_ptr<BreakLineParser> breakLineParser;
   std::shared_ptr<EmphasizedParser> emphasizedParser;
   std::shared_ptr<ImageParser> imageParser;
   std::shared_ptr<InlineCodeParser> inlineCodeParser;
@@ -136,6 +139,8 @@ private:
     this->inlineCodeParser->Parse(line);
 
     this->italicParser->Parse(line);
+
+    this->breakLineParser->Parse(line);
   }
 
   std::shared_ptr<BlockParser>

tests/maddy/test_maddy_breaklineparser.cpp

@@ -0,0 +1,35 @@
+/*
+ * This project is licensed under the MIT license. For more information see the
+ * LICENSE file.
+ */
+#include <memory>
+
+#include "gmock/gmock.h"
+
+#include "maddy/breaklineparser.h"
+
+// -----------------------------------------------------------------------------
+
+TEST(MADDY_BREAKLINEPARSER, ItReplacesMarkdownWithBreakLineHTML)
+{
+  std::string text =
+    "Test the text\r\n"
+    "test text to check\r\n"
+    "check testing to text.\r"
+    "Check test to test text\r"
+    "This is a test\r\n"
+    "No more test to check";
+
+  std::string expected =
+    "Test the text<br>"
+    "test text to check<br>"
+    "check testing to text.<br>"
+    "Check test to test text<br>"
+    "This is a test<br>"
+    "No more test to check";
+  auto breakLineParser = std::make_shared<maddy::BreakLineParser>();
+
+  breakLineParser->Parse(text);
+
+  ASSERT_EQ(text, expected);
+}