ADD file via upload

PPTExtractor.cpp

@@ -0,0 +1,73 @@
+#include "PPTExtractor.h"
+#include <zip.h>
+#include <pugixml.hpp>
+#include <iostream>
+#include <sstream>
+
+PPTExtractor::PPTExtractor(const std::string& filePath) : filePath(filePath) {}
+
+PPTExtractor::~PPTExtractor() {}
+
+bool PPTExtractor::isPPTX() {
+    return filePath.substr(filePath.find_last_of(".") + 1) == "pptx";
+}
+
+bool PPTExtractor::extractText(std::vector<std::string>& slidesText) {
+    if (isPPTX()) {
+        return extractTextFromPPTX(slidesText);
+    }
+    else {
+        std::cerr << "Only PPTX files are supported." << std::endl;
+        return false;
+    }
+}
+
+bool PPTExtractor::extractTextFromPPTX(std::vector<std::string>& slidesText) {
+    int err = 0;
+    zip_t* zip = zip_open(filePath.c_str(), 0, &err);
+    if (!zip) {
+        std::cerr << "Failed to open PPTX file." << std::endl;
+        return false;
+    }
+
+    for (int i = 1; ; ++i) {
+        std::ostringstream oss;
+        oss << "ppt/slides/slide" << i << ".xml";
+        std::string slidePath = oss.str();
+
+        struct zip_stat st;
+        if (zip_stat(zip, slidePath.c_str(), 0, &st) != 0) {
+            break; // No more slides
+        }
+
+        zip_file_t* slideFile = zip_fopen(zip, slidePath.c_str(), 0);
+        if (!slideFile) {
+            std::cerr << "Failed to open slide: " << slidePath << std::endl;
+            continue;
+        }
+
+        char* buffer = new char[st.size];
+        zip_fread(slideFile, buffer, st.size);
+        zip_fclose(slideFile);
+
+        pugi::xml_document doc;
+        pugi::xml_parse_result result = doc.load_buffer(buffer, st.size);
+        delete[] buffer;
+
+        if (!result) {
+            std::cerr << "Failed to parse slide XML: " << slidePath << std::endl;
+            continue;
+        }
+
+        std::string slideText;
+        for (pugi::xml_node node : doc.select_nodes("//a:t")) {
+            slideText += node.child_value();
+            slideText += "\n";
+        }
+
+        slidesText.push_back(slideText);
+    }
+
+    zip_close(zip);
+    return true;
+}