43 lines
1.4 KiB
C#
43 lines
1.4 KiB
C#
using System.Collections.ObjectModel;
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using System.Text.Json;
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using Snake.Model;
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namespace Snake.Persistance;
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public class SnakeLevelLoader{
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#region Fields
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private readonly string SaveFileName;
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private List<StoredSnakeLevel>? _stored_levels;
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#endregion
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#region Properties
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public ReadOnlyCollection<StoredSnakeLevel> StoredLevels => _stored_levels?.AsReadOnly()
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?? throw new InvalidOperationException("Can not query stored levels before loading the data");
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#endregion
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#region Constructors
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public SnakeLevelLoader(string saveFileName){
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SaveFileName = saveFileName;
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if(!File.Exists(SaveFileName)){
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throw new FileNotFoundException("Save file not found", SaveFileName);
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}
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}
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#endregion
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#region Methods
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public async Task ReadAllDataAsync()
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{
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string file_content = await File.ReadAllTextAsync(SaveFileName);
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_stored_levels = JsonSerializer.Deserialize<List<StoredSnakeLevel>>(file_content, new JsonSerializerOptions() { PropertyNamingPolicy = JsonNamingPolicy.SnakeCaseLower })
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?? throw new JsonException("Failed to deserialize stored levels");
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}
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public SnakeLevel LoadLevel(StoredSnakeLevel level){
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return new SnakeLevel(level.Size,
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level.Obstacles.Select(a => new Point(a[0], a[1])),
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level.SnakeStartLength,
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level.NewEggRound,
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level.EggLimit);
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}
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#endregion
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} |