Add doc/StyleGuide.md

Created by Preston, commited by me

doc/StyleGuide.md

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+# MarkdownToHtmlTranspiler – Style Guide
+
+**Purpose:**  
+This guide defines the coding, formatting, and contribution standards for all contributors to the **MarkdownToHtmlTranspiler** project. It ensures that all code remains consistent, maintainable, while supporting clarity.
+
+---
+
+## Project Overview
+
+This project is a **C++ Markdown to HTML transpiler**, converting Markdown files into HTML using a structured parsing system.  
+The repo includes:
+- **Build tooling:** `Makefile`, `flake.nix`, and related Nix configurations  
+- **Libraries & sources:** Under `src/` and `lib/`  
+- **Docs & UML:** Project diagrams and notes describing architecture  
+
+---
+
+## ⚙️ 1. Repository Layout
+
+| Path | Purpose |
+|------|----------|
+| `src/` | Main function
+| `lib/` | Helper modules or shared logic reused across the project |
+| `test/` | HTML output files |
+| `Makefile` | Primary build automation script |
+| `flake.nix` / `flake.lock` | Nix build and dependency management files |
+
+### File Naming
+- Source files: `camelCase.cpp`
+
+---
+
+## 💻 2. C++ Code Style
+
+### General Formatting
+- **Indentation:** 2 spaces (no tabs)
+- **Line length:** 150 characters max
+- **Braces:**
+  ```cpp
+  if (condition) {
+    doSomething();
+  } else {
+    doSomethingElse();
+  }
+ 
+- **Spacing:**
+  - Put a single space after commas and around binary operators.
+  - No spaces after `(` or before `)`.
+  - Example:
+    ```cpp
+    result = func(x, y + 1);
+    ```
+### Naming Conventions
+
+- **Classes & Structs:** `PascalCase`  
+  Example: `Parser`, `DomTree`
+- **Functions & Methods:** `PascalCase`  
+  Example: `Inspect()`, `ParserDocument()`
+- **Variables & Parameters:** `snake_case`  
+  Example: `input_file`, `output_path`
+- **Constants:** `ALL_CAPS_WITH_UNDERSCORES`  
+  Example: `MAX_BUFFER_SIZE`
+- **Namespaces:** `lowercase`
+---
+### Error Handling
+
+Use **exceptions** for runtime errors (`std::runtime_error`, `std::invalid_argument`, etc.).
+
+Always catch by reference.
+
+**Example:**
+
+```cpp
+try {
+  Parser p(argv[1]);
+  p.Inspect();
+} catch (const std::runtime_error &e) {
+  std::cerr << "Error: " << e.what() << std::endl;
+}
+ ```
+ ##  3. Commenting & Documentation Style
+ ###  General Rules
+
+- Use `//` for short inline comments.
+- Use `/** ... */` for function, class, or member documentation.
+- Start each docblock with `@brief` for a concise description.
+- Include `@param`, `@return`, and `@throws` (if applicable).
+- Always describe the intent, not just what the code does.
+- Add `@author` for major contributors.
+- ### 🔹 Example: Class Documentation
+
+Below is a properly documented example class showing how to format comments consistently throughout your codebase:
+```cpp
+/**
+* @file commandLineParser.h
+* @brief Parses command line
+* @author Preston Shultz
+* Sources:
+*
+*/
+
+#ifndef COMMAND_LINE_PARSER_H
+#define COMMAND_LINE_PARSER_H
+  
+#include  <string>
+#include  <vector>
+  
+/**
+
+* @brief CommandLine Helper class
+*
+* Parse input arguments, sets input and output files
+* Lets user use commands with program
+*
+* @author Preston Shultz (shultzp1@my.erau.edu)
+*/
+class  CLI {
+
+public:
+/**
+* @brief Takes in argc and argv and converts it to vector
+*
+* CLI constructor
+*
+* @author Preston Shultz (shultzp1@my.erau.edu)
+*/
+CLI(int  argc, char  **argv);
+
+
+/**
+* @brief Runs Commands
+*
+* @author Preston Shultz (shultzp1@my.erau.edu)
+*/
+void  RunCommands();
+
+
+/**
+* @brief Prints a list of commands that can be used
+*
+* @author Preston Shultz (shultzp1@my.erau.edu)
+*/
+void  PrintHelp() const;
+
+
+/**
+* @brief Returns input file
+*
+* @author Preston Shultz (shultzp1@my.erau.edu)
+*/
+std::string  GetInputFile() const { return input_file; }
+
+
+/**
+* @brief Returns if watchdog is enabled
+*
+* @author Preston Shultz (shultzp1@my.erau.edu)
+*/
+bool  WatchDogEnabled() {return watchdog_enabled;}
+
+
+/**
+* @brief Returns output file
+*
+* @author Preston Shultz (shultzp1@my.erau.edu)
+*/
+std::string  GetOutputFile() const { return output_file; }
+
+
+private:
+/**
+* @brief Ensures the provided filename has a .markup extension
+*
+* @return true if file ends with .markup
+* @return false otherwise
+* @author Preston Shultz (shultzp1@my.erau.edu)
+*/
+static  bool  IsMarkupFile(const  std::string  &filename);
+
+
+/**
+* @brief Ensures the provided filename has a .html extension
+*
+* @return true if file ends with .html
+* @return false otherwise
+* @author Preston Shultz (shultzp1@my.erau.edu)
+*/
+static  bool  IsHtmlFile(const  std::string  &filename);
+  
+
+/**
+* @brief Parses the commands
+*
+* @author Preston Shultz (shultzp1@my.erau.edu)
+*/
+void  ParseArgs(int  argc, char**  argv);
+  
+
+std::string program_name;
+std::string input_file;
+std::string output_file =  "";
+bool watchdog_enabled =  false;
+};
+
+#endif