type factory based kindle 2 latex converter initial commit.

typefactory/.gitignore

@@ -0,0 +1,74 @@
+# This file is used to ignore files which are generated
+# ----------------------------------------------------------------------------
+
+*~
+*.autosave
+*.a
+*.core
+*.moc
+*.o
+*.obj
+*.orig
+*.rej
+*.so
+*.so.*
+*_pch.h.cpp
+*_resource.rc
+*.qm
+.#*
+*.*#
+core
+!core/
+tags
+.DS_Store
+.directory
+*.debug
+Makefile*
+*.prl
+*.app
+moc_*.cpp
+ui_*.h
+qrc_*.cpp
+Thumbs.db
+*.res
+*.rc
+/.qmake.cache
+/.qmake.stash
+
+# qtcreator generated files
+*.pro.user*
+CMakeLists.txt.user*
+
+# xemacs temporary files
+*.flc
+
+# Vim temporary files
+.*.swp
+
+# Visual Studio generated files
+*.ib_pdb_index
+*.idb
+*.ilk
+*.pdb
+*.sln
+*.suo
+*.vcproj
+*vcproj.*.*.user
+*.ncb
+*.sdf
+*.opensdf
+*.vcxproj
+*vcxproj.*
+
+# MinGW generated files
+*.Debug
+*.Release
+
+# Python byte code
+*.pyc
+
+# Binaries
+# --------
+*.dll
+*.exe
+

typefactory/kindle2latex.pro

@@ -0,0 +1,7 @@
+TEMPLATE = app
+CONFIG += console c++17
+CONFIG -= app_bundle
+CONFIG -= qt
+
+SOURCES += \
+        main.cpp

typefactory/main.cpp

@@ -0,0 +1,325 @@
+#include <array>
+#include <cerrno>
+#include <cstring>
+#include <fstream>
+#include <getopt.h>
+#include <iostream>
+#include <stdexcept>
+#include <string>
+#include <unordered_map>
+#include <utility>
+#include <vector>
+
+#include "typefactory.h"  // <-- твой хедер
+
+// ------------------------------------------------------------
+// Helpers
+// ------------------------------------------------------------
+
+static std::string rstrip_cr (std::string s) {
+  if (!s.empty() && s.back() == '\r')
+    s.pop_back();
+  return s;
+}
+
+static std::string latex_escape (const std::string &s) {
+  std::string out;
+  out.reserve (s.size() + s.size() / 8);
+  for (unsigned char ch : s) {
+    switch (ch) {
+      case '\\':
+        out += "\\textbackslash{}";
+        break;
+      case '{':
+        out += "\\{";
+        break;
+      case '}':
+        out += "\\}";
+        break;
+      case '%':
+        out += "\\%";
+        break;
+      case '$':
+        out += "\\$";
+        break;
+      case '#':
+        out += "\\#";
+        break;
+      case '&':
+        out += "\\&";
+        break;
+      case '_':
+        out += "\\_";
+        break;
+      case '^':
+        out += "\\textasciicircum{}";
+        break;
+      case '~':
+        out += "\\textasciitilde{}";
+        break;
+      default:
+        out.push_back (static_cast<char> (ch));
+        break;
+    }
+  }
+  return out;
+}
+
+// ------------------------------------------------------------
+// Model
+// ------------------------------------------------------------
+
+struct Quote {
+  std::string meta;
+  std::vector<std::string> text_lines;
+};
+
+struct ParseContext {
+  std::vector<std::string> order;
+  std::unordered_map<std::string, std::vector<Quote>> by_title;
+  std::unordered_map<std::string, std::size_t> seen;
+
+  std::string cur_title;
+  std::string cur_meta;
+  std::vector<std::string> cur_text;
+
+  void start_title (std::string t) {
+    cur_title = std::move (t);
+    cur_meta.clear();
+    cur_text.clear();
+  }
+
+  void set_meta (std::string m) {
+    cur_meta = std::move (m);
+  }
+  void add_text (std::string line) {
+    cur_text.push_back (std::move (line));
+  }
+
+  void finalize_quote() {
+    if (cur_title.empty() || cur_meta.empty()) {
+      cur_meta.clear();
+      cur_text.clear();
+      return;
+    }
+
+    if (seen.find (cur_title) == seen.end()) {
+      seen.emplace (cur_title, order.size());
+      order.push_back (cur_title);
+    }
+
+    by_title[cur_title].push_back (Quote{cur_meta, cur_text});
+
+    cur_meta.clear();
+    cur_text.clear();
+  }
+};
+
+// ------------------------------------------------------------
+// Handlers
+// ------------------------------------------------------------
+
+enum class Stage { Title, Meta, Body };
+
+static constexpr std::array<Stage, 3> kAllStages = {
+  Stage::Title, Stage::Meta, Stage::Body
+};
+
+struct ILineHandler {
+  virtual ~ILineHandler() = default;
+  virtual void handle (const std::string &line, ParseContext &ctx, Stage &next) = 0;
+};
+
+struct TitleHandler final : ILineHandler {
+  void handle (const std::string &line, ParseContext &ctx, Stage &next) override {
+    if (line.empty()) {
+      next = Stage::Title;  // пропускаем пустые между блоками
+      return;
+    }
+    ctx.start_title (line);
+    next = Stage::Meta;
+  }
+};
+
+struct MetaHandler final : ILineHandler {
+  void handle (const std::string &line, ParseContext &ctx, Stage &next) override {
+    ctx.set_meta (line);
+    next = Stage::Body;
+  }
+};
+
+struct BodyHandler final : ILineHandler {
+  void handle (const std::string &line, ParseContext &ctx, Stage &next) override {
+    if (line == "==========") {
+      ctx.finalize_quote();
+      next = Stage::Title;
+      return;
+    }
+    ctx.add_text (line);    // в том числе пустые строки внутри цитаты
+    next = Stage::Body;
+  }
+};
+
+// ------------------------------------------------------------
+// Factory wiring (using your typefactory.h) + caching handlers
+// ------------------------------------------------------------
+
+using HandlerPtr = std::shared_ptr<ILineHandler>;
+using HandlerMap = std::unordered_map<Stage, HandlerPtr>;
+
+static TypeFactory<Stage, ILineHandler> build_factory() {
+  TypeFactory<Stage, ILineHandler> f;
+  f.registerType<TitleHandler> (Stage::Title);
+  f.registerType<MetaHandler> (Stage::Meta);
+  f.registerType<BodyHandler> (Stage::Body);
+  return f;
+}
+
+static HandlerMap build_handlers_cache (const TypeFactory<Stage, ILineHandler> &factory) {
+  HandlerMap handlers;
+  handlers.reserve (kAllStages.size());
+
+  // Рантайм-валидация: для каждого Stage обязаны уметь создать handler
+  for (Stage st : kAllStages) {
+    try {
+      auto h = factory.create (st); // shared_ptr<ILineHandler>
+      if (!h)
+        throw std::runtime_error ("Factory returned null handler");
+      handlers.emplace (st, std::move (h));
+    } catch (const std::out_of_range &) {
+      throw std::runtime_error ("Missing handler registration for some Stage");
+    }
+  }
+
+  // Доп.проверка: ensure all are present (на случай коллизий/ошибок emplace)
+  if (handlers.size() != kAllStages.size())
+    throw std::runtime_error ("Handler cache size mismatch");
+
+  return handlers;
+}
+
+// ------------------------------------------------------------
+// CLI
+// ------------------------------------------------------------
+
+struct CliArgs {
+  std::string input;
+  std::string output;
+};
+
+static void print_usage (const char *argv0) {
+  std::cerr << "Usage: " << argv0 << " --input <file> --output <file>\n";
+}
+
+static bool parse_args (int argc, char **argv, CliArgs &out) {
+  static option long_opts[] = {
+    {"input",  required_argument, nullptr, 'i'},
+    {"output", required_argument, nullptr, 'o'},
+    {"help",   no_argument,       nullptr, 'h'},
+    {nullptr,  0,                 nullptr,  0 }
+  };
+
+  int c = 0;
+  while ((c = ::getopt_long (argc, argv, "i:o:h", long_opts, nullptr)) != -1) {
+    switch (c) {
+      case 'i':
+        out.input = optarg;
+        break;
+      case 'o':
+        out.output = optarg;
+        break;
+      case 'h':
+        print_usage (argv[0]);
+        return false;
+      default:
+        print_usage (argv[0]);
+        return false;
+    }
+  }
+
+  if (out.input.empty() || out.output.empty()) {
+    print_usage (argv[0]);
+    return false;
+  }
+  return true;
+}
+
+// ------------------------------------------------------------
+// Convert
+// ------------------------------------------------------------
+
+static int convert (const std::string &in_path, const std::string &out_path) {
+  std::ifstream in (in_path);
+  if (!in.is_open()) {
+    std::cerr << "Failed to open input file: " << in_path
+              << " (" << std::strerror (errno) << ")\n";
+    return 2;
+  }
+
+  // Build factory + cache handlers once
+  TypeFactory<Stage, ILineHandler> factory = build_factory();
+
+  HandlerMap handlers;
+  try {
+    handlers = build_handlers_cache (factory);
+  } catch (const std::exception &e) {
+    std::cerr << "Internal error while building handler cache: " << e.what() << "\n";
+    return 4;
+  }
+
+  ParseContext ctx{};
+  Stage stage = Stage::Title;
+
+  std::string line;
+  while (std::getline (in, line)) {
+    line = rstrip_cr (std::move (line));
+
+    auto it = handlers.find (stage);
+    if (it == handlers.end() || !it->second) {
+      std::cerr << "Internal error: handler missing at runtime\n";
+      return 4;
+    }
+
+    Stage next = stage;
+    it->second->handle (line, ctx, next);
+    stage = next;
+  }
+
+  // EOF: если файл не закончился "==========", всё равно зафиксируем последний блок
+  ctx.finalize_quote();
+
+  std::ofstream out (out_path, std::ios::trunc);
+  if (!out.is_open()) {
+    std::cerr << "Failed to open output file: " << out_path
+              << " (" << std::strerror (errno) << ")\n";
+    return 3;
+  }
+
+  for (std::size_t i = 0; i < ctx.order.size(); ++i) {
+    const auto &title = ctx.order[i];
+    out << "\\section {" << latex_escape (title) << "}\n";
+
+    const auto it = ctx.by_title.find (title);
+    if (it == ctx.by_title.end())
+      continue;
+
+    for (const auto &q : it->second) {
+      out << "  \\subsection {" << latex_escape (q.meta) << "}\n";
+      for (const auto &tl : q.text_lines)
+        out << "    " << latex_escape (tl) << "\n";
+      out << "      \\subsubsection{notes}\n\n";
+    }
+
+    if (i + 1 < ctx.order.size())
+      out << "\n";
+  }
+
+  return 0;
+}
+
+int main (int argc, char **argv) {
+  CliArgs args;
+  if (!parse_args (argc, argv, args))
+    return 1;
+  return convert (args.input, args.output);
+}

typefactory/typefactory.h

@@ -0,0 +1,118 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2026 Dim Himro
+
+#ifndef TYPEFACTORY_H
+#define TYPEFACTORY_H
+
+#include <memory>
+#include <type_traits>
+#include <unordered_map>
+#include <utility>   // std::move
+
+/**
+ * @brief Registry-based factory for creating objects by runtime identifier.
+ *
+ * Allows registering derived types and instantiating them using a ClassId key.
+ *
+ * Notes:
+ * - Not thread-safe. Register types during initialization phase only.
+ * - Re-registering the same id overwrites the previous entry ("last wins").
+ * - ClassId must be hashable (std::hash<ClassId> specialization must exist).
+ *
+ * @tparam ClassId -Unique class identifier type (e.g. std::string, int, enum).
+ * @tparam BaseClass -Base type for all created objects.
+ * @tparam Arg - Constructor arguments forwarded to registered derived types (by value).
+ *
+ * Usage example:
+ * @code
+ * #include <string>
+ *
+ * struct Base {
+ *   virtual ~Base() = default;
+ *   virtual int get() = 0;
+ * };
+ *
+ * struct Derived1 : Base {
+ *   explicit Derived1(int start) : m_start(start) {}
+ *   int get() override { return m_start + 1; }
+ *   int m_start = 0;
+ * };
+ *
+ * struct Derived2 : Base {
+ *   explicit Derived2(int start) : m_start(start) {}
+ *   int get() override { return m_start + 2; }
+ *   int m_start = 0;
+ * };
+ *
+ * TypeFactory<std::string, Base, int> factory;
+ * factory.registerType<Derived1>("one");
+ * factory.registerType<Derived2>("two");
+ *
+ * auto a = factory.create("one", 10);
+ * auto b = factory.creator("two")(10); // advanced API: get creator function
+ *
+ * (void)a->get();
+ * (void)b->get();
+ * @endcode
+ */
+template <class ClassId, class BaseClass, class... Args>
+class TypeFactory {
+public:
+  using BasePtr   = std::shared_ptr<BaseClass>;
+  using CreatorFn = BasePtr (*)(Args...);
+
+  TypeFactory() = default;
+
+  /**
+   * @brief Registers a Derived type under the given id.
+   *
+   * Requirements (checked at compile-time):
+   * - Derived must inherit from BaseClass
+   * - Derived must be constructible from Args...
+   *
+   * Re-registering the same id overwrites the previous entry ("last wins").
+   */
+  template <class Derived>
+  void registerType(const ClassId& id) {
+    static_assert(std::is_base_of_v<BaseClass, Derived>,
+                  "Derived must inherit from BaseClass");
+    static_assert(std::is_constructible_v<Derived, Args...>,
+                  "Derived must be constructible from Args...");
+
+    classes.insert_or_assign(id, &instantiate<Derived>);
+  }
+
+  /**
+   * @brief Returns creator function for the given id.
+   * @throws std::out_of_range when id is not registered.
+   */
+  [[nodiscard]] CreatorFn creator(const ClassId& id) const {
+    return classes.at(id);
+  }
+
+  /**
+   * @brief Creates an instance for the given id using provided arguments.
+   * @throws std::out_of_range when id is not registered.
+   */
+  [[nodiscard]] BasePtr create(const ClassId& id, Args... args) const {
+    return creator(id)(std::move(args)...);
+  }
+
+  /**
+   * @brief Checks whether an id is registered.
+   */
+  [[nodiscard]] bool contains(const ClassId& id) const {
+    return classes.find(id) != classes.end();
+  }
+
+protected:
+  // Protected by design: derived factories may extend/inspect the registry.
+  std::unordered_map<ClassId, CreatorFn> classes;
+
+private:
+  template <class Derived>
+  static BasePtr instantiate(Args... args) {
+    return std::make_shared<Derived>(std::move(args)...);
+  }
+};
+#endif // TYPEFACTORY_H