99 lines
2.4 KiB
C++
99 lines
2.4 KiB
C++
#pragma once
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#include <expat.h>
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#include <string>
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#include <vector>
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/**
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* Type of OPDS entry.
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*/
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enum class OpdsEntryType {
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NAVIGATION, // Link to another catalog
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BOOK // Downloadable book
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};
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/**
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* Represents an entry from an OPDS feed (either a navigation link or a book).
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*/
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struct OpdsEntry {
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OpdsEntryType type = OpdsEntryType::NAVIGATION;
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std::string title;
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std::string author; // Only for books
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std::string href; // Navigation URL or epub download URL
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std::string id;
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};
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// Legacy alias for backward compatibility
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using OpdsBook = OpdsEntry;
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/**
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* Parser for OPDS (Open Publication Distribution System) Atom feeds.
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* Uses the Expat XML parser to parse OPDS catalog entries.
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*
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* Usage:
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* OpdsParser parser;
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* if (parser.parse(xmlData, xmlLength)) {
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* for (const auto& entry : parser.getEntries()) {
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* if (entry.type == OpdsEntryType::BOOK) {
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* // Downloadable book
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* } else {
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* // Navigation link to another catalog
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* }
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* }
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* }
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*/
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class OpdsParser {
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public:
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OpdsParser();
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~OpdsParser();
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// Disable copy
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OpdsParser(const OpdsParser&) = delete;
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OpdsParser& operator=(const OpdsParser&) = delete;
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void push(const char* xmlData, size_t length);
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void finish();
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bool error() const;
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/**
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* Get the parsed entries (both navigation and book entries).
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* @return Vector of OpdsEntry entries
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*/
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const std::vector<OpdsEntry>& getEntries() const& { return entries; }
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std::vector<OpdsEntry> getEntries() && { return std::move(entries); }
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/**
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* Get only book entries (legacy compatibility).
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* @return Vector of book entries
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*/
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std::vector<OpdsEntry> getBooks() const;
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/**
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* Clear all parsed entries.
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*/
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void clear();
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private:
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// Expat callbacks
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static void XMLCALL startElement(void* userData, const XML_Char* name, const XML_Char** atts);
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static void XMLCALL endElement(void* userData, const XML_Char* name);
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static void XMLCALL characterData(void* userData, const XML_Char* s, int len);
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// Helper to find attribute value
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static const char* findAttribute(const XML_Char** atts, const char* name);
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XML_Parser parser = nullptr;
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std::vector<OpdsEntry> entries;
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OpdsEntry currentEntry;
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std::string currentText;
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// Parser state
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bool inEntry = false;
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bool inTitle = false;
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bool inAuthor = false;
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bool inAuthorName = false;
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bool inId = false;
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bool errorOccured = false;
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};
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