language_detector.cpp

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#include "spell_language.hpp"
#include "rune_sequence.hpp"
#include "unicode.hpp"
#include <algorithm>
#include <unordered_map>
 
namespace rune_caster {
namespace spell {
namespace language {
 
LanguageDetector::LanguageDetector() = default;
 
RuneSequence LanguageDetector::operator()(const RuneSequence& input) const {
    // Create a copy to work with
    RuneSequence result = input;
 
    // Detect language and update the sequence's language hint
    auto detected_language = detect_language_from_script(input);
 
    // Set the detected language as a hint in the result
    // This is a simplified implementation - a real detector would be more sophisticated
    result.set_language_hint(detected_language);
 
    return result;
}
 
std::string LanguageDetector::description() const {
    return "Detects the primary language of text based on script analysis";
}
 
rune_caster::language::Code LanguageDetector::detect_language_from_script(const RuneSequence& text) const {
    // Simple script-based language detection
    // This is a placeholder implementation - real language detection would
    // analyze character frequencies, n-grams, and other linguistic features
 
    std::unordered_map<unicode::Script, int> script_counts;
 
    // Count characters by script
    for (const auto& rune : text) {
        auto script = rune.script();
        script_counts[script]++;
    }
 
    // Find the most common script
    auto most_common = std::max_element(
        script_counts.begin(),
        script_counts.end(),
        [](const auto& a, const auto& b) {
            return a.second < b.second;
        }
    );
 
    if (most_common == script_counts.end()) {
        return rune_caster::language::Code::Unknown;
    }
 
    // Map scripts to likely languages (simplified)
    switch (most_common->first) {
        case unicode::Script::Latin:
            // More sophisticated detection would be needed here
            // For now, default to English for Latin script
            return rune_caster::language::Code::English;
 
        case unicode::Script::Hangul:
            return rune_caster::language::Code::Korean;
 
        case unicode::Script::Hiragana:
        case unicode::Script::Katakana:
        case unicode::Script::Han:
            // Need more analysis to distinguish Chinese/Japanese
            return rune_caster::language::Code::Japanese;
 
        case unicode::Script::Cyrillic:
            // Default to Russian for Cyrillic
            return rune_caster::language::Code::Russian;
 
        case unicode::Script::Arabic:
            return rune_caster::language::Code::Arabic;
 
        case unicode::Script::Devanagari:
            return rune_caster::language::Code::Hindi;
 
        default:
            return rune_caster::language::Code::Unknown;
    }
}
 
} // namespace language
} // namespace spell
} // namespace rune_caster