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45 lines
1.3 KiB
45 lines
1.3 KiB
#include "song.hpp"
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#include <komihash.h>
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namespace database {
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/* Helper function to update a komihash stream with a std::string. */
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auto HashString(komihash_stream_t* stream, std::string str) -> void {
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komihash_stream_update(stream, str.c_str(), str.length());
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}
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/*
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* Uses a komihash stream to incrementally hash tags. This lowers the function's
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* memory footprint a little so that it's safe to call from any stack.
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*/
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auto SongTags::Hash() const -> uint64_t {
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// TODO(jacqueline): this function doesn't work very well for songs with no
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// tags at all.
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komihash_stream_t stream;
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komihash_stream_init(&stream, 0);
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HashString(&stream, title.value_or(""));
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HashString(&stream, artist.value_or(""));
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HashString(&stream, album.value_or(""));
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return komihash_stream_final(&stream);
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}
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auto SongData::UpdateHash(uint64_t new_hash) const -> SongData {
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return SongData(id_, filepath_, new_hash, play_count_, is_tombstoned_);
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}
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auto SongData::Entomb() const -> SongData {
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return SongData(id_, filepath_, tags_hash_, play_count_, true);
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}
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auto SongData::Exhume(const std::string& new_path) const -> SongData {
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return SongData(id_, new_path, tags_hash_, play_count_, false);
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}
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void swap(Song& first, Song& second) {
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Song temp = first;
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first = second;
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second = temp;
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}
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} // namespace database
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