72 lines
1.3 KiB
Go
72 lines
1.3 KiB
Go
package storage
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import (
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"encoding/json"
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"io/fs"
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"os"
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"path/filepath"
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"strings"
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"sync"
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"github.com/NickyBoy89/spatial-db/world"
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)
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func ReadChunkFromFile(chunkFile *os.File) (world.ChunkData, error) {
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var chunkData world.ChunkData
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if err := json.NewDecoder(chunkFile).Decode(&chunkData); err != nil {
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return chunkData, err
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}
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return chunkData, nil
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}
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func ReadParallelFromDirectory(dirName string) ([]world.ChunkData, error) {
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chunkFiles, err := os.ReadDir(dirName)
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if err != nil {
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panic(err)
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}
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// Filter invalid chunks
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validChunkFiles := []fs.DirEntry{}
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for _, chunkFile := range chunkFiles {
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if chunkFile.IsDir() || !strings.HasSuffix(chunkFile.Name(), ".chunk") {
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continue
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}
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validChunkFiles = append(validChunkFiles, chunkFile)
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}
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chunks := make([]world.ChunkData, len(validChunkFiles))
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var wg sync.WaitGroup
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wg.Add(len(validChunkFiles))
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for fileIndex, chunkFile := range validChunkFiles {
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// Avoid implicit copies
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chunkFile := chunkFile
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fileIndex := fileIndex
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go func() {
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defer wg.Done()
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file, err := os.Open(filepath.Join(dirName, chunkFile.Name()))
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if err != nil {
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panic(err)
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}
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chunkData, err := ReadChunkFromFile(file)
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if err != nil {
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panic(err)
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}
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file.Close()
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chunks[fileIndex] = chunkData
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}()
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}
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wg.Wait()
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return chunks, nil
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}
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