137 lines
3.7 KiB
C++
Executable File
137 lines
3.7 KiB
C++
Executable File
//
|
|
// Created by brett on 21/08/23.
|
|
//
|
|
|
|
#ifndef BLT_MUSTACHE_H
|
|
#define BLT_MUSTACHE_H
|
|
|
|
#include <string>
|
|
#include <exception>
|
|
#include <blt/std/hashmap.h>
|
|
|
|
namespace blt
|
|
{
|
|
|
|
class mustache_syntax_error : public std::runtime_error
|
|
{
|
|
public:
|
|
explicit mustache_syntax_error(): std::runtime_error("mustache syntax is invalid!")
|
|
{}
|
|
|
|
explicit mustache_syntax_error(const std::string& str): std::runtime_error(str)
|
|
{}
|
|
};
|
|
|
|
class mustache_lexer
|
|
{
|
|
private:
|
|
std::string str;
|
|
size_t index = 0;
|
|
public:
|
|
explicit mustache_lexer(std::string str): str(std::move(str))
|
|
{}
|
|
|
|
inline bool hasNext()
|
|
{
|
|
if (index >= str.size())
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
inline char peek()
|
|
{
|
|
return str[index];
|
|
}
|
|
|
|
inline bool hasTemplatePrefix()
|
|
{
|
|
if (index + 1 >= str.size())
|
|
return false;
|
|
return str[index] == '{' && str[index + 1] == '{';
|
|
}
|
|
|
|
inline bool hasTemplateSuffix()
|
|
{
|
|
if (index + 1 >= str.size())
|
|
return false;
|
|
return str[index] == '}' && str[index + 1] == '}';
|
|
}
|
|
|
|
inline void consumeTemplatePrefix()
|
|
{
|
|
index += 2;
|
|
}
|
|
|
|
inline void consumeTemplateSuffix()
|
|
{
|
|
index += 2;
|
|
}
|
|
|
|
inline std::string consumeToken()
|
|
{
|
|
std::string token;
|
|
while (!hasTemplateSuffix())
|
|
{
|
|
if (!hasNext())
|
|
throw mustache_syntax_error("Error processing token. Mustache template incomplete.");
|
|
token += consume();
|
|
}
|
|
return token;
|
|
}
|
|
|
|
inline char consume()
|
|
{
|
|
return str[index++];
|
|
}
|
|
};
|
|
|
|
class mustache
|
|
{
|
|
private:
|
|
mustache_lexer lexer;
|
|
|
|
std::string assemble(){
|
|
std::string buffer;
|
|
|
|
while (lexer.hasNext()){
|
|
if (lexer.hasTemplatePrefix()){
|
|
lexer.consumeTemplatePrefix();
|
|
if (!lexer.hasNext())
|
|
throw mustache_syntax_error("template incomplete, found '{{' missing '}}'");
|
|
auto c = lexer.peek();
|
|
switch (c) {
|
|
case '%':
|
|
break;
|
|
case '$':
|
|
break;
|
|
case '#':
|
|
break;
|
|
case '@':
|
|
break;
|
|
case '/':
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
} else
|
|
buffer += lexer.consume();
|
|
}
|
|
|
|
return buffer;
|
|
}
|
|
|
|
public:
|
|
explicit mustache(std::string str): lexer(std::move(str))
|
|
{}
|
|
|
|
static std::string compile(std::string input) {
|
|
mustache compiler(std::move(input));
|
|
return compiler.assemble();
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
#endif //BLT_MUSTACHE_H
|