parser.h

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#pragma once
 
#include <iostream>
#include <map> // we want an ordered map
#include <string>
#include <vector>
 
class Parser {
private:
  static constexpr char delimeters[] = " \".,:;!?<>{}[]()_=+^%*&#";
  std::string mOutputFilePath;
  std::string mInputFilePath;
  std::map<std::string, size_t> *mGlobalFreqencyMap;
  std::map<std::string, size_t> mLocalFreqencyMap;
  void addToMap(std::string word, std::map<std::string, size_t> &freqencyMap);
  void addToMap(std::string word);
  void parseLine(const std::string &line);
 
public:
  Parser(const std::string &path,
         std::map<std::string, size_t> *globalFreqencyMap = nullptr);
  bool parse();
  void exportToFile();
  friend std::ostream &operator<<(std::ostream &out, const Parser &aDis);
};
 
struct ParserCollection {
  std::map<std::string, size_t> globalFreqencyMap;
  std::vector<Parser> parsers;
  void exportGlobal(std::ostream &out = std::cout);
};
 
class StringHelper {
  StringHelper() = delete;
 
public:
  static void toLower(std::string &word);
};
 
template <typename K, typename V>
std::ostream &operator<<(std::ostream &os, const std::map<K, V> &m) {
  for (const std::pair<K, V> &p : m) {
    os << "{" << p.first << ": " << p.second << "}\n";
  }
  return os;
}
 
inline std::ostream &operator<<(std::ostream &out, const Parser &parser) {
  out << parser.mLocalFreqencyMap;
  return out;
}