ADD file via upload

search_engine.h

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+#pragma once
+#include <xapian.h>
+#include <cppjieba/Jieba.hpp>
+#include <string>
+#include <vector>
+#include <memory>
+
+struct SearchResult {
+    std::string path;
+    std::string snippet;
+    std::vector<size_t> positions;
+    double score;
+};
+
+class SearchEngine {
+public:
+    SearchEngine(const std::string& db_path);
+    ~SearchEngine();
+
+    // 添加文档到索引
+    void addDocument(const std::string& path, const std::string& content);
+    
+    // 搜索文档
+    std::vector<SearchResult> search(const std::string& query, size_t limit = 10);
+    
+    // 提交更改
+    void commit();
+
+    enum class SortField {
+        RELEVANCE,
+        PATH,
+        SIZE,
+        MODIFIED_TIME
+    };
+
+    enum class SortOrder {
+        ASC,
+        DESC
+    };
+
+    struct SearchOptions {
+        size_t limit = 10;
+        size_t offset = 0;
+        SortField sort_field = SortField::RELEVANCE;
+        SortOrder sort_order = SortOrder::DESC;
+        std::string file_type;
+    };
+
+    std::vector<SearchResult> search(
+        const std::string& query,
+        const SearchOptions& options
+    );
+
+private:
+    std::unique_ptr<Xapian::WritableDatabase> db_;
+    std::unique_ptr<Xapian::TermGenerator> term_gen_;
+    std::unique_ptr<cppjieba::Jieba> jieba_;
+    
+    // 分词处理
+    std::string tokenize(const std::string& text);
+    
+    // 获取高亮片段
+    std::string getSnippet(const std::string& content, const std::string& query);
+};