Add plan serialization

1 files changed, 30 insertions, 0 deletions

diff --git a/scripts/lib.js b/scripts/lib.js
index 4e4850e..9a5e957 100644
--- a/scripts/lib.js
+++ b/scripts/lib.js
@@ -2,9 +2,39 @@ const h = preact.h;
 const CELL_SIZE = 32;
 const GRID_SIZE_X = 21;
 const GRID_SIZE_Y = 21;
+const FLOOR_COUNT = 15;
 
 const ASSET_SVG_PROPS = {"width": CELL_SIZE, "height": CELL_SIZE,
                          "version": "1.1"};
 const ASSET_WHITE_BG = h("rect", {"x": 0, "y": 0, "width": CELL_SIZE,
                                   "height": CELL_SIZE, "fill": "white",
                                   "stroke-width": 0 });
+
+// Bytes is a Uint8Array
+async function compressBytes(bytes)
+{
+    let blob = new Blob([bytes]);
+    const ds = new CompressionStream("deflate");
+    const compressed = blob.stream().pipeThrough(ds);
+    let compressed_blob = await new Response(compressed).blob();
+    const reader = new FileReader();
+    return new Promise((resolve, _) => {
+        reader.onloadend = (event) => {
+            const result = event.target.result;
+            resolve(result.replace(/^data:.+;base64,/, '')
+                    .replaceAll("/", "-").replaceAll("+", "_"));
+        }
+        reader.readAsDataURL(compressed_blob);
+    });
+}
+
+// Decompress into Uint8Array
+function decompressBytes(s)
+{
+    const decoded = window.atob(s.replaceAll("_", "+").replaceAll("-", "/"));
+    const decoded_array = Uint8Array.from(decoded, c => c.charCodeAt(0));
+    let blob = new Blob([decoded_array]);
+    const cs = new DecompressionStream("deflate");
+    const decompressed = blob.stream().pipeThrough(cs);
+    return new Response(decompressed).bytes();
+}