4 files changed, 163 insertions, 0 deletions
diff --git a/src/localization/line_id.cpp b/src/localization/line_id.cpp
new file mode 100644
index 0000000..7bfeb7c
--- /dev/null
+++ b/src/localization/line_id.cpp
@@ -0,0 +1,16 @@
+#include "line_id.hpp"
+
+#include <optional>
+#include <string>
+
+namespace bot {
+  namespace loc {
+    std::optional<LineId> string_to_line_id(const std::string &str) {
+      if (str == "ping.response") {
+        return LineId::PingResponse;
+      } else {
+        return std::nullopt;
+      }
+    }
+  }
+}
diff --git a/src/localization/line_id.hpp b/src/localization/line_id.hpp
new file mode 100644
index 0000000..168c28d
--- /dev/null
+++ b/src/localization/line_id.hpp
@@ -0,0 +1,12 @@
+#pragma once
+
+#include <optional>
+#include <string>
+
+namespace bot {
+  namespace loc {
+    enum LineId { PingResponse };
+
+    std::optional<LineId> string_to_line_id(const std::string &str);
+  }
+}
diff --git a/src/localization/localization.cpp b/src/localization/localization.cpp
new file mode 100644
index 0000000..82473fd
--- /dev/null
+++ b/src/localization/localization.cpp
@@ -0,0 +1,103 @@
+#include "localization.hpp"
+
+#include <algorithm>
+#include <filesystem>
+#include <fstream>
+#include <nlohmann/json.hpp>
+#include <optional>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+#include "../utils/string.hpp"
+#include "line_id.hpp"
+
+namespace bot {
+  namespace loc {
+    Localization::Localization(const std::string &folder_path) {
+      for (const auto &entry :
+           std::filesystem::directory_iterator(folder_path)) {
+        std::vector<std::string> file_name_parts =
+            utils::string::split_text(entry.path(), '/');
+        std::string file_name = file_name_parts[file_name_parts.size() - 1];
+        file_name = file_name.substr(0, file_name.length() - 5);
+
+        std::unordered_map<LineId, std::string> lines =
+            this->load_from_file(entry.path());
+
+        this->localizations[file_name] = lines;
+      }
+    }
+
+    std::unordered_map<LineId, std::string> Localization::load_from_file(
+        const std::string &file_path) {
+      std::ifstream ifs(file_path);
+
+      std::unordered_map<LineId, std::string> map;
+
+      nlohmann::json json;
+      ifs >> json;
+
+      for (auto it = json.begin(); it != json.end(); ++it) {
+        std::optional<LineId> line_id = string_to_line_id(it.key());
+
+        if (line_id.has_value()) {
+          map[line_id.value()] = it.value();
+        }
+      }
+
+      ifs.close();
+      return map;
+    }
+
+    std::optional<std::string> Localization::get_localized_line(
+        const std::string &locale_id, const LineId &line_id) {
+      auto locale_it =
+          std::find_if(this->localizations.begin(), this->localizations.end(),
+                       [&](const auto &x) { return x.first == locale_id; });
+
+      if (locale_it == this->localizations.end()) {
+        return std::nullopt;
+      }
+
+      auto line_it =
+          std::find_if(locale_it->second.begin(), locale_it->second.end(),
+                       [&](const auto &x) { return x.first == line_id; });
+
+      if (line_it == locale_it->second.end()) {
+        return std::nullopt;
+      }
+
+      return line_it->second;
+    }
+
+    std::optional<std::string> Localization::get_formatted_line(
+        const std::string &locale_id, const LineId &line_id,
+        const std::vector<std::string> &args) {
+      std::optional<std::string> o_line =
+          this->get_localized_line(locale_id, line_id);
+
+      if (!o_line.has_value()) {
+        return std::nullopt;
+      }
+
+      std::string line = o_line.value();
+
+      int pos = 0;
+      int index = 0;
+
+      while ((pos = line.find("%s", pos)) != std::string::npos) {
+        line.replace(pos, 2, args[index]);
+        pos += args[index].size();
+        ++index;
+
+        if (index >= args.size()) {
+          break;
+        }
+      }
+
+      return line;
+    }
+
+  }
+}
diff --git a/src/localization/localization.hpp b/src/localization/localization.hpp
new file mode 100644
index 0000000..d1ee2af
--- /dev/null
+++ b/src/localization/localization.hpp
@@ -0,0 +1,32 @@
+#pragma once
+
+#include <optional>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+#include "line_id.hpp"
+
+namespace bot {
+  namespace loc {
+    class Localization {
+      public:
+        Localization(const std::string &folder_path);
+        ~Localization() = default;
+
+        std::optional<std::string> get_localized_line(
+            const std::string &locale_id, const LineId &line_id);
+
+        std::optional<std::string> get_formatted_line(
+            const std::string &locale_id, const LineId &line_id,
+            const std::vector<std::string> &args);
+
+      private:
+        std::unordered_map<LineId, std::string> load_from_file(
+            const std::string &file_path);
+        std::unordered_map<std::string, std::unordered_map<LineId, std::string>>
+            localizations;
+    };
+  }
+
+}