Toward template rendering.

src/compiler/CMakeLists.txt

@@ -1,11 +1,15 @@
 list(APPEND compiler_HEADERS 
     Lexer.h
 	TemplatingEngine.h
+	TemplateFile.h
+	TemplateNodes.h
     )
 
 list(APPEND compiler_LIB_INCLUDES 
     Lexer.cpp
 	TemplatingEngine.cpp
+	TemplateFile.cpp
+	TemplateNodes.cpp
     )
 
 add_library(compiler SHARED ${compiler_LIB_INCLUDES} ${compiler_HEADERS})

src/compiler/TemplateFile.cpp

@@ -0,0 +1,187 @@
+#include "TemplateFile.h"
+
+#include <iostream>
+
+TemplateFile::TemplateFile(const Path& path)
+	: mPath(path),
+	mRootNode(std::make_unique<TemplateNode>(nullptr))
+{
+
+}
+
+std::vector<std::string> TemplateFile::getProcessedContent() const
+{
+	return mProcessedContent;
+}
+
+std::string TemplateFile::getName() const
+{
+	return mPath.stem().string();
+}
+
+void TemplateFile::loadContent()
+{
+	std::cout << "Trying to load file at: " << mPath << std::endl;
+	mRawContent = File(mPath).readLines();
+	mWorkingLine = 0;
+	mWorkingNode = mRootNode.get();
+	mWorkingTextBody = std::make_unique<TemplateTextBody>(mWorkingNode);
+	for (const auto& line : mRawContent)
+	{
+		processLine(line);
+		mWorkingLine++;
+	}
+	onTextBodyFinished();
+}
+
+void TemplateFile::onTextBodyFinished(std::string working_string)
+{
+	if (!working_string.empty())
+	{
+		mWorkingTextBody->addLine(working_string);
+	}
+
+	if (mWorkingTextBody->hasContent())
+	{
+		mWorkingNode->addChild(std::move(mWorkingTextBody));
+		mWorkingTextBody = std::make_unique<TemplateTextBody>(mWorkingNode);
+	}
+}
+
+void TemplateFile::processLine(const std::string& line)
+{
+	bool last_was_ldelimiter{ 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;
+	std::string last_working_string;
+	for (auto c : line)
+	{
+		if (c == '{')
+		{
+			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_statement = true;
+			last_working_string = working_string;
+			working_string = "";
+		}
+		else if (c == '%' && in_statement)
+		{
+			last_was_statement_rdelimiter = true;
+		}
+		else if (c == '}' && (last_was_statement_rdelimiter || in_expression || last_was_expression_rdelimiter))
+		{
+			if (last_was_statement_rdelimiter)
+			{
+				onTextBodyFinished(last_working_string);
+				onFoundStatement(working_string);
+				last_was_statement_rdelimiter = false;
+				working_string = "";
+			}
+			else if (in_expression)
+			{
+				last_was_expression_rdelimiter = true;
+				in_expression = false;
+			}
+			else
+			{
+				onTextBodyFinished();
+				onFoundExpression(working_string);
+				last_was_expression_rdelimiter = false;
+				working_string = "";
+			}
+		}
+		else if (last_was_ldelimiter && (!in_statement && !in_expression))
+		{
+			last_was_ldelimiter = false;
+			working_string += '{';
+			working_string += c;
+		}
+		else
+		{
+			working_string += c;
+		}
+	}
+
+	if (!working_string.empty())
+	{
+		mWorkingTextBody->addLine(working_string);
+	}
+}
+
+void TemplateFile::onFoundStatement(const std::string& statement_string)
+{
+	const auto statement_elements = StringUtils::split(statement_string);
+
+	if (statement_elements.size() == 0)
+	{
+		return;
+	}
+	const auto statement_type = statement_elements[0];
+	if (statement_type == "block" && statement_elements.size() == 2)
+	{
+		onFoundBlock(statement_elements);
+	}
+	else if (statement_type == "endblock")
+	{
+		onFoundEndBlock(statement_elements);
+	}
+	else if (statement_type == "extends")
+	{
+		onFoundExtends(statement_elements);
+	}
+
+}
+
+void TemplateFile::onFoundBlock(const std::vector<std::string> args)
+{
+	if (args.size() != 2)
+	{
+		return;
+	}
+	auto block = std::make_unique<TemplateBlock>(mWorkingNode, args[1]);
+	auto temp = block.get();
+	mWorkingNode->addChild(std::move(block));
+	mWorkingNode = temp;
+}
+
+void TemplateFile::onFoundEndBlock(const std::vector<std::string> args)
+{
+	mWorkingNode = mWorkingNode->getParent();
+}
+
+void TemplateFile::onFoundExtends(const std::vector<std::string> args)
+{
+	if (args.size() != 2)
+	{
+		return;
+	}
+	auto extends = std::make_unique<TemplateExtends>(mWorkingNode, args[1]);
+	mWorkingNode->addChild(std::move(extends));
+}
+
+void TemplateFile::onFoundExpression(const std::string& expression_string)
+{
+	auto expression = std::make_unique<TemplateExpression>(mWorkingNode, expression_string);
+	mWorkingNode->addChild(std::move(expression));
+}
+
+void TemplateFile::dumpContent()
+{
+	auto content = mRootNode->getRawContent();
+	std::cout << content << std::endl;
+}

src/compiler/TemplateFile.h

@@ -0,0 +1,50 @@
+#pragma once
+
+#include "File.h"
+
+#include "TemplateNodes.h"
+
+#include <vector>
+
+class TemplateFile
+{
+public:
+	TemplateFile(const Path& path);
+
+	std::vector<std::string> getProcessedContent() const;
+
+	std::string getName() const;
+
+	void loadContent();
+
+	void onTextBodyFinished(std::string working_string = {});
+
+	void processLine(const std::string& line);
+
+	void onFoundStatement(const std::string& statement_string);
+
+	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);
+
+	void dumpContent();
+
+	TemplateNode* getContent() const
+	{
+		return mRootNode.get();
+	}
+
+private:
+	Path mPath;
+	unsigned mWorkingLine{ 0 };
+	std::string mParentName;
+	std::vector<std::string> mRawContent;
+	std::vector<std::string> mProcessedContent;
+	std::unique_ptr<TemplateNode> mRootNode;
+	TemplateNode* mWorkingNode{ nullptr };
+	std::unique_ptr<TemplateTextBody> mWorkingTextBody;
+};

src/compiler/TemplateNodes.h

@@ -0,0 +1,190 @@
+#pragma once
+
+class TemplateNode
+{
+public:
+
+	TemplateNode(TemplateNode* parent)
+		: mParent(parent)
+	{
+
+	}
+
+	TemplateNode* getParent() const
+	{
+		return mParent;
+	}
+
+	virtual void addChild(std::unique_ptr<TemplateNode> child)
+	{
+		mChildren.push_back(std::move(child));
+	}
+
+	std::size_t getNumChildren() const
+	{
+		return mChildren.size();
+	}
+
+	TemplateNode* getChild(std::size_t index) const
+	{
+		return mChildren[index].get();
+	}
+
+	virtual std::string getRawContent() const
+	{
+		std::string content;
+		for (const auto& child : mChildren)
+		{
+			content += child->getRawContent() + "\n";
+		}
+		return content;
+	}
+
+	template<typename T>
+	T* getFirstChildShallow() const
+	{
+		for (const auto& child : mChildren)
+		{
+			if (auto ret = dynamic_cast<T*>(child.get()))
+			{
+				return ret;
+			}
+		}
+		return nullptr;
+	}
+
+	void setExtensionParent(TemplateNode* parent)
+	{
+		mExtensionParent = parent;
+	}
+
+	virtual std::string render()
+	{
+		std::string content;
+		for (size_t idx = 0; idx < mChildren.size(); idx++)
+		{
+			content += mChildren[idx]->render();
+		}
+		return content;
+	}
+
+protected:
+	std::vector<std::unique_ptr<TemplateNode> > mChildren;
+	TemplateNode* mParent{ nullptr };
+	TemplateNode* mExtensionParent{ nullptr };
+};
+
+using TemplateNodePtr = std::unique_ptr<TemplateNode>;
+
+class TemplateExtends : public TemplateNode
+{
+public:
+	TemplateExtends(TemplateNode* parent, const std::string& path)
+		: TemplateNode(parent),
+		mPath(path)
+	{
+
+	};
+
+	std::string getRawContent() const override
+	{
+		return "TemplateExtends: " + mPath;
+	}
+
+	std::string getPath() const
+	{
+		return mPath;
+	}
+
+private:
+	std::string mPath;
+};
+
+class TemplateBlock : public TemplateNode
+{
+public:
+	TemplateBlock(TemplateNode* parent, const std::string& name)
+		: TemplateNode(parent),
+		mName(name)
+	{
+
+	}
+
+	void addLine(const std::string& line)
+	{
+		mBody.push_back(line);
+	}
+
+	std::string getRawContent() const override
+	{
+		std::string content = "TemplateBlock: " + mName + "\n";
+		content += TemplateNode::getRawContent();
+		return content;
+	}
+
+private:
+	std::string mName;
+	std::vector<std::string> mBody;
+};
+
+class TemplateExpression : public TemplateNode
+{
+public:
+	TemplateExpression(TemplateNode* parent, const std::string& content)
+		: TemplateNode(parent),
+		mContent(content)
+	{
+
+	}
+
+	std::string getRawContent() const override
+	{
+		return "TemplateExpression: " + mContent;
+	}
+
+private:
+	std::string mContent;
+};
+
+class TemplateTextBody : public TemplateNode
+{
+public:
+	TemplateTextBody(TemplateNode* parent)
+		: TemplateNode(parent)
+	{
+
+	}
+
+	void addLine(const std::string& content)
+	{
+		mContent.push_back(content);
+	}
+
+	bool hasContent() const
+	{
+		return !mContent.empty();
+	}
+
+	std::string render() override
+	{
+		std::string content;
+		for (const auto& line : mContent)
+		{
+			content += line;
+		}
+		return content;
+	}
+
+	std::string getRawContent() const override
+	{
+		std::string content;
+		for (const auto& line : mContent)
+		{
+			content += "TemplateBody: " + line + "\n";
+		}
+		return content;
+	}
+
+private:
+	std::vector<std::string> mContent;
+};

src/compiler/TemplatingEngine.cpp

@@ -0,0 +1,82 @@
+#include "TemplatingEngine.h"
+
+#include "Directory.h"
+
+#include <iostream>
+
+TemplatingEngine::TemplatingEngine(const Path& workingDirectory)
+	: mWorkingDirectory(workingDirectory)
+{
+
+}
+
+void TemplatingEngine::loadTemplateFiles()
+{
+	const auto files = Directory::getFilesWithExtension(mWorkingDirectory, mTemplateExtension);
+	for (const auto& file : files)
+	{
+		mTemplateFiles.push_back(std::make_unique<TemplateFile>(file));
+	}
+}
+
+std::string TemplatingEngine::processTemplate(const std::string& name)
+{
+	if (auto file = getTemplateFile(name))
+	{
+		return processTemplate(file);
+	}
+	return {};
+}
+
+TemplateFile* TemplatingEngine::getTemplateFile(const Path& path)
+{
+	return getTemplateFile(path.stem().string());
+}
+
+TemplateFile* TemplatingEngine::getTemplateFile(const std::string& name)
+{
+	std::cout << "Looking for template file with name: " << name << std::endl;
+	for (const auto& file : mTemplateFiles)
+	{
+		if (file->getName() == name)
+		{
+			return file.get();
+		}
+	}
+	return nullptr;
+}
+
+std::string TemplatingEngine::processTemplate(TemplateFile* file, TemplateNode* parent)
+{
+	file->loadContent();
+	file->dumpContent();
+
+	auto content = file->getContent();
+	if (parent)
+	{
+		content->setExtensionParent(parent);
+	}
+
+	if (auto extension_node = content->getFirstChildShallow<TemplateExtends>())
+	{
+		std::cout << "Found extension node" << std::endl;
+		if (auto extension_template = getTemplateFile(Path(extension_node->getPath())))
+		{
+			std::cout << "Found extension template" << std::endl;
+			return processTemplate(extension_template, parent);
+		}
+		else
+		{
+			return render(content);
+		}
+	}
+	else
+	{
+		return render(content);
+	}
+}
+
+std::string TemplatingEngine::render(TemplateNode* content)
+{
+	return content->render();
+}

src/compiler/TemplatingEngine.h

@@ -1,399 +1,28 @@
 #pragma once
 
 #include "File.h"
-#include "Directory.h"
-#include "StringUtils.h"
+#include "TemplateFile.h"
 
 #include <vector>
 #include <string>
-#include <sstream>
-#include <iostream>
-
-class TemplateNode
-{
-public:
-
-	TemplateNode(TemplateNode* parent)
-		: mParent(parent)
-	{
-
-	}
-
-	TemplateNode* getParent() const
-	{
-		return mParent;
-	}
-
-	virtual void addChild(std::unique_ptr<TemplateNode> child)
-	{
-		mChildren.push_back(std::move(child));
-	}
-
-	std::size_t getNumChildren() const
-	{
-		return mChildren.size();
-	}
-
-	TemplateNode* getChild(std::size_t index) const
-	{
-		return mChildren[index].get();
-	}
-
-	virtual std::string getRawContent() const
-	{
-		std::string content;
-		for (const auto& child : mChildren)
-		{
-			content += child->getRawContent() + "\n";
-		}
-		return content;
-	}
-
-protected:
-	std::vector<std::unique_ptr<TemplateNode> > mChildren;
-	TemplateNode* mParent{ nullptr };
-};
-
-using TemplateNodePtr = std::unique_ptr<TemplateNode>;
-
-class TemplateExtends : public TemplateNode
-{
-public:
-	TemplateExtends(TemplateNode* parent, const std::string& path)
-		: TemplateNode(parent),
-			mPath(path)
-	{
-
-	};
-
-	std::string getRawContent() const override
-	{
-		return "TemplateExtends: " + mPath;
-	}
-
-private:
-	std::string mPath;
-};
-
-class TemplateBlock : public TemplateNode
-{
-public:
-	TemplateBlock(TemplateNode* parent, const std::string& name)
-		: TemplateNode(parent), 
-			mName(name)
-	{
-
-	}
-
-	void addLine(const std::string& line)
-	{
-		mBody.push_back(line);
-	}
-
-	std::string getRawContent() const override
-	{
-		std::string content = "TemplateBlock: " + mName + "\n";
-		content += TemplateNode::getRawContent();
-		return content;
-	}
-
-private:
-	std::string mName;
-	std::vector<std::string> mBody;
-};
-
-class TemplateExpression : public TemplateNode
-{
-public: 
-	TemplateExpression(TemplateNode* parent, const std::string& content)
-		: TemplateNode(parent), 
-			mContent(content)
-	{
-
-	}
-
-	std::string getRawContent() const override
-	{
-		return "TemplateExpression: " + mContent;
-	}
-
-private:
-	std::string mContent;
-};
-
-class TemplateTextBody : public TemplateNode
-{
-public:
-	TemplateTextBody(TemplateNode* parent)
-		: TemplateNode(parent)
-	{
-
-	}
-
-	void addLine(const std::string& content)
-	{
-		mContent.push_back(content);
-	}
-
-	bool hasContent() const
-	{
-		return !mContent.empty();
-	}
-
-	std::string getRawContent() const override
-	{
-		std::string content;
-		for (const auto& line : mContent)
-		{
-			content += "TemplateBody: " + line + "\n";
-		}
-		return content;
-	}
-
-private:
-	std::vector<std::string> mContent;
-};
-
-class TemplateFile
-{
-public:
-	TemplateFile(const Path& path)
-		: mPath(path),
-		mRootNode(std::make_unique<TemplateNode>(nullptr))
-	{
-
-	}
-
-	std::vector<std::string> getProcessedContent() const
-	{
-		return mProcessedContent;
-	}
-
-	std::string getName() const
-	{
-		return mPath.stem().string();
-	}
-
-	void loadContent()
-	{
-		std::cout << "Trying to load file at: " << mPath << std::endl;
-		mRawContent = File(mPath).readLines();
-		mWorkingLine = 0;
-		mWorkingNode = mRootNode.get();
-		mWorkingTextBody = std::make_unique<TemplateTextBody>(mWorkingNode);
-		for (const auto& line : mRawContent)
-		{
-			processLine(line);
-			mWorkingLine++;
-		}
-		onTextBodyFinished();
-	}
-
-	void onTextBodyFinished(std::string working_string = {})
-	{
-		if (!working_string.empty())
-		{
-			mWorkingTextBody->addLine(working_string);
-		}
-
-		if (mWorkingTextBody->hasContent())
-		{
-			mWorkingNode->addChild(std::move(mWorkingTextBody));
-			mWorkingTextBody = std::make_unique<TemplateTextBody>(mWorkingNode);
-		}
-	}
-
-	void processLine(const std::string& line)
-	{
-		bool last_was_ldelimiter{ 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;
-		std::string last_working_string;
-		for (auto c : line)
-		{
-			if (c == '{')
-			{
-				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_statement = true;
-				last_working_string = working_string;
-				working_string = "";
-			}
-			else if (c == '%' && in_statement)
-			{
-				last_was_statement_rdelimiter = true;
-			}
-			else if (c == '}' && (last_was_statement_rdelimiter || in_expression || last_was_expression_rdelimiter))
-			{
-				if (last_was_statement_rdelimiter)
-				{
-					onTextBodyFinished(last_working_string);
-					onFoundStatement(working_string);
-					last_was_statement_rdelimiter = false;
-					working_string = "";
-				}
-				else if (in_expression)
-				{
-					last_was_expression_rdelimiter = true;
-					in_expression = false;
-				}
-				else
-				{
-					onTextBodyFinished();
-					onFoundExpression(working_string);
-					last_was_expression_rdelimiter = false;
-					working_string = "";
-				}
-			}
-			else if (last_was_ldelimiter && (!in_statement && !in_expression))
-			{
-				last_was_ldelimiter = false;
-				working_string += '{';
-				working_string += c;
-			}
-			else
-			{
-				working_string += c;
-			}
-		}
-
-		if (!working_string.empty())
-		{
-			mWorkingTextBody->addLine(working_string);
-		}
-	}
-
-	void onFoundStatement(const std::string& statement_string)
-	{
-		const auto statement_elements = StringUtils::split(statement_string);
-
-		if (statement_elements.size() == 0)
-		{
-			return;
-		}
-		const auto statement_type = statement_elements[0];
-		if (statement_type == "block" && statement_elements.size() == 2)
-		{
-			onFoundBlock(statement_elements);
-		}
-		else if (statement_type == "endblock")
-		{
-			onFoundEndBlock(statement_elements);
-		}
-		else if (statement_type == "extends")
-		{
-			onFoundExtends(statement_elements);
-		}
-
-	}
-
-	void onFoundBlock(const std::vector<std::string> args)
-	{
-		if (args.size() != 2)
-		{
-			return;
-		}
-		auto block = std::make_unique<TemplateBlock>(mWorkingNode, args[1]);
-		auto temp = block.get();
-		mWorkingNode->addChild(std::move(block));
-		mWorkingNode = temp;
-	}
-
-	void onFoundEndBlock(const std::vector<std::string> args)
-	{
-		mWorkingNode = mWorkingNode->getParent();
-	}
-
-	void onFoundExtends(const std::vector<std::string> args)
-	{
-		if (args.size() != 2)
-		{
-			return;
-		}
-		auto extends = std::make_unique<TemplateExtends>(mWorkingNode, args[1]);
-		mWorkingNode->addChild(std::move(extends));
-	}
-
-	void onFoundExpression(const std::string& expression_string)
-	{
-		auto expression = std::make_unique<TemplateExpression>(mWorkingNode, expression_string);
-		mWorkingNode->addChild(std::move(expression));
-	}
-
-	void dumpContent()
-	{
-		auto content = mRootNode->getRawContent();
-		std::cout << content << std::endl;
-	}
-
-private:
-	Path mPath;
-	unsigned mWorkingLine{ 0 };
-	std::string mParentName;
-	std::vector<std::string> mRawContent;
-	std::vector<std::string> mProcessedContent;
-	std::unique_ptr<TemplateNode> mRootNode; 
-	TemplateNode* mWorkingNode{ nullptr };
-	std::unique_ptr<TemplateTextBody> mWorkingTextBody;
-};
 
 class TemplatingEngine
 {
 public:
-	TemplatingEngine(const Path& workingDirectory)
-		: mWorkingDirectory(workingDirectory)
-	{
-
-	}
-
-	void loadTemplateFiles()
-	{
-		const auto files = Directory::getFilesWithExtension(mWorkingDirectory, mTemplateExtension);
-		for (const auto& file : files)
-		{
-			mTemplateFiles.push_back(TemplateFile(file));
-		}
-	}
-
-	void processTemplate(const std::string& name)
-	{
-		for (auto& file : mTemplateFiles)
-		{
-			const auto filename = file.getName();
-			if (filename == name)
-			{
-				processTemplate(file);
-				break;
-			}
-		}
-	}
-
-	void processTemplate(TemplateFile& file)
-	{
-		file.loadContent();
-		file.dumpContent();
-	}
-
+	TemplatingEngine(const Path& workingDirectory);
 
+	void loadTemplateFiles();
 
+	std::string processTemplate(const std::string& name);
 
 private:
-	std::vector<TemplateFile> mTemplateFiles;
+	TemplateFile* getTemplateFile(const std::string& name);
+	TemplateFile* getTemplateFile(const Path& path);
+	std::string render(TemplateNode* content);
+
+	std::string processTemplate(TemplateFile* file, TemplateNode* parent = nullptr);
+
+	std::vector<std::unique_ptr<TemplateFile> > mTemplateFiles;
 	Path mWorkingDirectory;
 	std::string mTemplateExtension{ ".html" };
 };

src/core/file_utilities/File.cpp

@@ -76,7 +76,20 @@ FileFormat::Format File::InferFormat() const
 
 void File::WriteText(const std::string& text)
 {
+    bool had_to_open{ false };
+    if (!mOutHandle)
+    {
+        had_to_open = true;
+        SetAccessMode(File::AccessMode::Write);
+        Open();
+    }
+
     (*mOutHandle) << text;
+
+    if (had_to_open)
+    {
+        Close();
+    }
 }
 
 std::vector<std::string> File::readLines()

test/compiler/TestTemplatingEngine.cpp

@@ -1,5 +1,7 @@
 #include "TemplatingEngine.h"
 
+#include <File.h>
+
 #include <filesystem>
 #include <iostream>
 
@@ -9,8 +11,8 @@ int main()
 
 	auto engine = TemplatingEngine(data_loc);
 	engine.loadTemplateFiles();
-	engine.processTemplate("index");
-	engine.processTemplate("base");
-
+	const auto content = engine.processTemplate("index");
 
+	File outfile("index.html");
+	outfile.WriteText(content);
 }