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https://github.com/daveallie/crosspoint-reader.git
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b6bc1f7ed3
## Summary * Use single unified cache file for book spine, table of contents, and core metadata (title, author, cover image) * Use new temp item store file in OPF parsing to store items to be rescaned when parsing spine * This avoids us holding these items in memory * Use new toc.bin.tmp and spine.bin.tmp to build out partial toc / spine data as part of parsing content.opf and the NCX file * These files are re-read multiple times to ultimately build book.bin ## Additional Context * Spec for file format included below as an image * This should help with: * #10 * #60 * #99
88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
#pragma once
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#include <SD.h>
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#include <string>
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class BookMetadataCache {
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public:
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struct BookMetadata {
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std::string title;
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std::string author;
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std::string coverItemHref;
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};
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struct SpineEntry {
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std::string href;
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size_t cumulativeSize;
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int16_t tocIndex;
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SpineEntry() : cumulativeSize(0), tocIndex(-1) {}
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SpineEntry(std::string href, const size_t cumulativeSize, const int16_t tocIndex)
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: href(std::move(href)), cumulativeSize(cumulativeSize), tocIndex(tocIndex) {}
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};
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struct TocEntry {
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std::string title;
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std::string href;
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std::string anchor;
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uint8_t level;
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int16_t spineIndex;
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TocEntry() : level(0), spineIndex(-1) {}
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TocEntry(std::string title, std::string href, std::string anchor, const uint8_t level, const int16_t spineIndex)
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: title(std::move(title)),
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href(std::move(href)),
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anchor(std::move(anchor)),
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level(level),
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spineIndex(spineIndex) {}
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};
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private:
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std::string cachePath;
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size_t lutOffset;
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uint16_t spineCount;
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uint16_t tocCount;
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bool loaded;
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bool buildMode;
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File bookFile;
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// Temp file handles during build
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File spineFile;
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File tocFile;
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size_t writeSpineEntry(File& file, const SpineEntry& entry) const;
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size_t writeTocEntry(File& file, const TocEntry& entry) const;
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SpineEntry readSpineEntry(File& file) const;
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TocEntry readTocEntry(File& file) const;
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public:
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BookMetadata coreMetadata;
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explicit BookMetadataCache(std::string cachePath)
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: cachePath(std::move(cachePath)), lutOffset(0), spineCount(0), tocCount(0), loaded(false), buildMode(false) {}
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~BookMetadataCache() = default;
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// Building phase (stream to disk immediately)
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bool beginWrite();
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bool beginContentOpfPass();
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void createSpineEntry(const std::string& href);
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bool endContentOpfPass();
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bool beginTocPass();
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void createTocEntry(const std::string& title, const std::string& href, const std::string& anchor, uint8_t level);
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bool endTocPass();
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bool endWrite();
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bool cleanupTmpFiles() const;
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// Post-processing to update mappings and sizes
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bool buildBookBin(const std::string& epubPath, const BookMetadata& metadata);
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// Reading phase (read mode)
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bool load();
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SpineEntry getSpineEntry(int index);
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TocEntry getTocEntry(int index);
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int getSpineCount() const { return spineCount; }
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int getTocCount() const { return tocCount; }
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bool isLoaded() const { return loaded; }
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};
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