[TASK] Initial commit with basic product setup

Assets/Mapbox SDK/Mapbox/Unity/MeshGeneration/Factories/TerrainDataFetcher.cs

@@ -0,0 +1,77 @@
+using Mapbox.Map;
+using Mapbox.Unity;
+using Mapbox.Unity.Map;
+using Mapbox.Unity.MeshGeneration.Data;
+using Mapbox.Unity.MeshGeneration.Enums;
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class DataFetcherParameters
+{
+	public CanonicalTileId canonicalTileId;
+	public string mapid;
+	public UnityTile tile;
+}
+
+public class ImageDataFetcherParameters : DataFetcherParameters
+{
+	public bool useRetina = true;
+}
+
+public class TerrainDataFetcherParameters : DataFetcherParameters
+{
+}
+
+public class VectorDataFetcherParameters : DataFetcherParameters
+{
+	public bool useOptimizedStyle = false;
+	public Style style = null;
+}
+
+public abstract class DataFetcher : ScriptableObject
+{
+	protected MapboxAccess _fileSource;
+
+	public void OnEnable()
+	{
+		_fileSource = MapboxAccess.Instance;
+	}
+
+	public abstract void FetchData(DataFetcherParameters parameters);
+}
+
+public class TerrainDataFetcher : DataFetcher
+{
+	public Action<UnityTile, RawPngRasterTile> DataRecieved = (t, s) => { };
+	public Action<UnityTile, RawPngRasterTile, TileErrorEventArgs> FetchingError = (t, r, s) => { };
+
+	//tile here should be totally optional and used only not to have keep a dictionary in terrain factory base
+	public override void FetchData(DataFetcherParameters parameters)
+	{
+		var terrainDataParameters = parameters as TerrainDataFetcherParameters;
+		if(terrainDataParameters == null)
+		{
+			return;	
+		}
+		var pngRasterTile = new RawPngRasterTile();
+		pngRasterTile.Initialize(_fileSource, terrainDataParameters.canonicalTileId, terrainDataParameters.mapid, () =>
+		{
+			if (terrainDataParameters.tile.CanonicalTileId != pngRasterTile.Id)
+			{
+				//this means tile object is recycled and reused. Returned data doesn't belong to this tile but probably the previous one. So we're trashing it.
+				return;
+			}
+
+			if (pngRasterTile.HasError)
+			{
+				FetchingError(terrainDataParameters.tile, pngRasterTile, new TileErrorEventArgs(terrainDataParameters.canonicalTileId, pngRasterTile.GetType(), null, pngRasterTile.Exceptions));
+			}
+			else
+			{
+				DataRecieved(terrainDataParameters.tile, pngRasterTile);
+			}
+		});
+	}
+}