From 98842b24f26cde4e064d1457582cf36e1d6be059 Mon Sep 17 00:00:00 2001
From: jmsgrogan <grogan.ox@gmail.com>
Date: Thu, 13 Oct 2022 08:57:26 +0100
Subject: [PATCH] Template enginge - start parsing nodes.

---
 src/compiler/TemplatingEngine.h | 147 ++++++++++++++++++++++++++++----
 src/core/StringUtils.cpp        |  36 ++++++++
 src/core/StringUtils.h          |   1 +
 3 files changed, 166 insertions(+), 18 deletions(-)

diff --git a/src/compiler/TemplatingEngine.h b/src/compiler/TemplatingEngine.h
index 60bae69..381eb9e 100644
--- a/src/compiler/TemplatingEngine.h
+++ b/src/compiler/TemplatingEngine.h
@@ -8,9 +8,67 @@
 #include <string>
 #include <iostream>
 
-class TemplateBlock
+class TemplateNode
 {
+public:
 
+	TemplateNode()
+	{
+
+	}
+
+	virtual void addChild(std::unique_ptr<TemplateNode> child)
+	{
+		mChildren.push_back(std::move(child));
+	}
+
+protected:
+	std::vector<std::unique_ptr<TemplateNode> > mChildren;
+};
+
+using TemplateNodePtr = std::unique_ptr<TemplateNode>;
+
+class TemplateBlock : public TemplateNode
+{
+public:
+	TemplateBlock(const std::string& name)
+		: mName(name)
+	{
+
+	}
+
+	void addLine(const std::string& line)
+	{
+		mBody.push_back(line);
+	}
+
+private:
+	std::string mName;
+	std::vector<std::string> mBody;
+};
+
+class TemplateExpression : public TemplateNode
+{
+public: 
+	TemplateExpression(const std::string& content)
+		: mContent(content)
+	{
+
+	}
+private:
+	std::string mContent;
+};
+
+class TemplateTextBody : public TemplateNode
+{
+public:
+	TemplateTextBody(const std::string& content)
+		: mContent(content)
+	{
+
+	}
+private:
+	std::string mContent;
 };
 
 class TemplateFile
@@ -47,49 +105,102 @@ public:
 	void processLine(const std::string& line)
 	{
 		bool last_was_ldelimiter{ false };
-		bool last_was_rdelimiter{ false };
-		bool in_tag{ false };
+		bool last_was_statement_rdelimiter{ false };
+		bool last_was_expression_rdelimiter{ false };
+		bool in_statement{ false };
+		bool in_expression{ false };
 		std::string working_string;
 		for (auto c : line)
 		{
 			if (c == '{')
 			{
-				last_was_ldelimiter = true;
+				if (last_was_ldelimiter)
+				{
+					in_expression = true;
+					last_was_ldelimiter = false;
+					working_string = "";
+				}
+				else
+				{
+					last_was_ldelimiter = true;
+				}			
 			}
 			else if (c == '%' && last_was_ldelimiter)
 			{
 				last_was_ldelimiter = false;
-				in_tag = true;
+				in_statement = true;
 				working_string = "";
 			}
-			else if (c == '%' && in_tag)
+			else if (c == '%' && in_statement)
 			{
-				last_was_rdelimiter = true;
+				last_was_statement_rdelimiter = true;
 			}
-			else if (c == '}' && last_was_rdelimiter)
+			else if (c == '}' && (last_was_statement_rdelimiter || in_expression || last_was_expression_rdelimiter))
 			{
-				break;
+				if (last_was_statement_rdelimiter)
+				{
+					onFoundStatement(working_string);
+					last_was_statement_rdelimiter = false;
+					working_string = "";
+				}
+				else if (in_expression)
+				{
+					last_was_expression_rdelimiter = true;
+					in_expression = false;
+				}
+				else
+				{
+					onFoundExpression(working_string);
+					last_was_expression_rdelimiter = false;
+					working_string = "";
+				}
 			}
 			else
 			{
 				working_string += c;
 			}
 		}
-
-		if (in_tag)
-		{
-			onFoundTag(working_string);
-		}
 	}
 
-	void onFoundTag(const std::string& tag_string)
+	void onFoundStatement(const std::string& statement_string)
 	{
-		const auto tag_elements = StringUtils::split(tag_string);
+		std::cout << "Got Statement: " << statement_string << std::endl;
+		const auto statement_elements = StringUtils::split(statement_string);
 
-		for (const auto& element : tag_elements)
+		if (statement_elements.size() == 0)
 		{
-			std::cout << "Got tag element: " << element << std::endl;
+			return;
 		}
+		const auto statement_type = statement_elements[0];
+		if (statement_type == "block")
+		{
+			onFoundBlock(statement_elements);
+		}
+		else if (statement_type == "endblock")
+		{
+			onFoundEndBlock(statement_elements);
+		}
+
+	}
+
+	void onFoundBlock(const std::vector<std::string> args)
+	{
+
+	}
+
+	void onFoundEndBlock(const std::vector<std::string> args)
+	{
+
+	}
+
+	void onFoundExtends(const std::vector<std::string> args)
+	{
+
+	}
+
+	void onFoundExpression(const std::string& expression_string)
+	{
+		std::cout << "Got Expression: " << expression_string << std::endl;
 	}
 
 private:
diff --git a/src/core/StringUtils.cpp b/src/core/StringUtils.cpp
index 145b0ea..e2727a1 100644
--- a/src/core/StringUtils.cpp
+++ b/src/core/StringUtils.cpp
@@ -20,6 +20,42 @@ bool StringUtils::IsSpace(char c)
     return std::isspace(c, loc);
 }
 
+std::string StringUtils::strip(const std::string& input)
+{
+    if (input.empty())
+    {
+        return {};
+    }
+
+    std::locale loc;
+    std::string working_string;
+    std::size_t first_nonspace = 0;
+    std::size_t last_nonspace = working_string.size() - 1;
+    for (std::size_t idx = 0; idx < working_string.size(); idx++)
+    {
+        if (!std::isspace(working_string[idx], loc))
+        {
+            first_nonspace = idx;
+            break;
+        }
+    }
+
+    if (first_nonspace == last_nonspace)
+    {
+        return {};
+    }
+
+    for (std::size_t idx = last_nonspace; idx > 0; idx--)
+    {
+        if (!std::isspace(working_string[idx], loc))
+        {
+            last_nonspace = idx;
+            break;
+        }
+    }
+    return working_string.substr(first_nonspace, last_nonspace-first_nonspace);
+}
+
 std::vector<std::string> StringUtils::split(const std::string& input)
 {
     std::vector<std::string> substrings;
diff --git a/src/core/StringUtils.h b/src/core/StringUtils.h
index 7336b52..3b85a50 100644
--- a/src/core/StringUtils.h
+++ b/src/core/StringUtils.h
@@ -22,4 +22,5 @@ public:
     static std::string convert(const std::wstring& input);
     static std::string ToPaddedString(unsigned numBytes, unsigned entry);
     static std::vector<std::string> split(const std::string& input);
+    static std::string strip(const std::string& input);
 };