feat: export as .schem

todo: block properties
todo: fix bug with air blocks

src/components/dialogs/SaveLitematic.tsx

@@ -66,8 +66,7 @@ function SaveLitematic({ close }: DialogProps) {
 
 		filledBlocks.forEach((block) => {
 			const blockInfo = blockData[block.name.replace("minecraft:", "")];
-			let blockName = block.name;
-			if (blockInfo) blockName = blockInfo.id[0].toString();
+			const blockName = blockInfo ? blockInfo.id[0].toString() : block.name;
 
 			const blockId = blockStatePallete.findIndex((entry) => entry.Name === `minecraft:${blockName}`);
 

src/components/dialogs/SaveSchem.tsx

@@ -0,0 +1,138 @@
+import { useContext, useState } from "react";
+import * as nbt from "nbtify";
+
+import { CanvasContext } from "@/context/Canvas";
+import { LoadingContext } from "@/context/Loading";
+
+import { DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from "@/components/ui/dialog";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+
+import _blockData from "@/data/blocks/data.json";
+const blockData: BlockData = _blockData;
+
+function SaveLitematic({ close }: DialogProps) {
+	const { canvasSize, blocks } = useContext(CanvasContext);
+	const { setLoading } = useContext(LoadingContext);
+
+	const [fileName, setFileName] = useState("blockmatic");
+
+	const onSubmit = async () => {
+		setLoading(true);
+		// Wait for loading indicator to appear
+		await new Promise((resolve) => setTimeout(resolve, 100));
+
+		// todo: check if file name input is empty/valid
+		const width = canvasSize.maxX - canvasSize.minX;
+		const height = canvasSize.maxY - canvasSize.minY;
+
+		// Fill in empty blocks with "air"
+		const filledBlocks: Block[] = [];
+
+		for (let x = canvasSize.minX; x <= canvasSize.maxX - 1; x++) {
+			for (let y = canvasSize.minY; y <= canvasSize.maxY - 1; y++) {
+				const existingBlock = blocks.find((block) => block.x === x && block.y === y);
+				if (existingBlock) {
+					filledBlocks.push(existingBlock);
+				} else {
+					filledBlocks.push({ name: "air", x, y });
+				}
+			}
+		}
+
+		// Sort array
+		filledBlocks.sort((a, b) => {
+			if (a.y !== b.y) {
+				return b.y - a.y;
+			}
+			return a.x - b.x;
+		});
+
+		// Generate the block pallete
+		const blockPallete = Array.from(
+			new Set(
+				filledBlocks.map((block) => {
+					const blockInfo = blockData[block.name.replace("minecraft:", "")];
+					// todo: add block properties
+					return `minecraft:${blockInfo.id[0]}`;
+				})
+			)
+		).reduce<Record<string, nbt.Int32<number>>>((acc, blockName, index) => {
+			acc[blockName] = new nbt.Int32(index);
+			return acc;
+		}, {});
+
+		// Get the block data
+		const buffer = new ArrayBuffer(filledBlocks.length);
+		const blockPlaceData = new Int8Array(buffer);
+
+		filledBlocks.forEach((block, index) => {
+			const blockInfo = blockData[block.name.replace("minecraft:", "")];
+			const blockName = blockInfo ? blockInfo.id[0].toString() : block.name;
+			const blockId = blockPallete[`minecraft:${blockName}`];
+
+			blockPlaceData[index] = parseInt(blockId.toString());
+		});
+
+		// Generate NBT data
+		const data = {
+			Schematic: {
+				DataVersion: new nbt.Int32(4189),
+				Version: new nbt.Int32(3),
+				Width: new nbt.Int16(width),
+				Height: new nbt.Int16(height),
+				Length: new nbt.Int16(1),
+				Metadata: {
+					Date: new Date().getTime(),
+				},
+				Blocks: {
+					Data: blockPlaceData,
+					Palette: blockPallete,
+				},
+			},
+		};
+
+		// Write to file
+		const bytes = await nbt.write(data);
+		const compressed = await nbt.compress(bytes, "gzip");
+
+		const blob = new Blob([compressed], { type: "application/x-gzip" });
+		const url = URL.createObjectURL(blob);
+
+		setLoading(false);
+
+		const link = document.createElement("a");
+		link.href = url;
+		link.download = `${fileName}.schem`;
+		link.click();
+
+		URL.revokeObjectURL(url);
+
+		close();
+	};
+
+	return (
+		<DialogContent>
+			<DialogHeader>
+				<DialogTitle>Save as .schem</DialogTitle>
+				<DialogDescription>Save your image as a .schem (Sponge)</DialogDescription>
+			</DialogHeader>
+
+			<div className="flex items-center gap-2">
+				<Input value={fileName} onChange={(e) => setFileName(e.target.value)} />
+				<span>.schem</span>
+			</div>
+
+			<DialogFooter>
+				<Button variant="outline" onClick={close}>
+					Cancel
+				</Button>
+				<Button type="submit" onClick={onSubmit}>
+					Download
+				</Button>
+			</DialogFooter>
+		</DialogContent>
+	);
+}
+
+export default SaveLitematic;

src/components/menubar/FileMenu.tsx

@@ -27,7 +27,7 @@ function FileMenu() {
 				<MenubarSub>
 					<MenubarSubTrigger>Export to...</MenubarSubTrigger>
 					<MenubarSubContent>
-						<MenubarItem>.schematic</MenubarItem>
+						<MenubarItem onClick={() => openDialog("SaveSchem")}>.schem</MenubarItem>
 						<MenubarItem onClick={() => openDialog("SaveLitematic")}>.litematic</MenubarItem>
 						<MenubarItem onClick={() => openDialog("SaveImage")}>image</MenubarItem>
 					</MenubarSubContent>