Add ability to import multiple mural

src/UI/components/menu.tsx

@@ -7,7 +7,7 @@ import { Store } from "../../lib/store";
 import { MuralList } from "./muralList";
 import { Coordinates, CordType } from "../../lib/coordinates";
 import { Palette } from "../../lib/palette";
-import { importArtWork } from "../importMural";
+import { importArtWorks } from "../importMural";
 import { Popup } from "./Popup";
 import { Storage } from "../../lib/storage";
 import { takeCanvasShot } from "../../lib/canvashot";
@@ -106,8 +106,8 @@ export class Menu extends React.Component<Props, State> {
 
     import = async () => {
         try {
-            const mural = await importArtWork(this.props.store, this.props.cords,  this.props.palette);
-            if (mural) {
+            const murals = await importArtWorks(this.props.store, this.props.cords,  this.props.palette);
+            for (const mural of murals) {
                 this.props.store.add(mural);
             }
         } catch (error) {

src/UI/components/muralView.tsx

@@ -14,7 +14,6 @@ import { BIN_FORMATS } from "../importMural";
 import saveAs from "file-saver";
 import { Popup } from "./Popup";
 import { Palette } from "../../lib/palette";
-import { Mural } from "../../lib/mural";
 
 const Margin = styled.div`
     margin: 2px;

src/UI/importMural.tsx

@@ -85,11 +85,12 @@ export interface ImageToMuralOptions {
     quantizerSetting: DitherSetting;
 }
 
-export async function importArtWork(store: Store, cords: Coordinates, palette: Palette) {
-    const file = await importFile();
-    if (file) {
+export async function importArtWorks(store: Store, cords: Coordinates, palette: Palette) {
+    const files = await importFiles();
+    const output: MuralOld[] = [];
+    for (const file of files) {
         if (file.type === "mural") {
-            return file.data as MuralOld;
+            output.push(file.data);
         } else {
             const img = file.data as HTMLImageElement;
             const pixels = await imageToMural(img, palette);
@@ -111,9 +112,10 @@ export async function importArtWork(store: Store, cords: Coordinates, palette: P
                 });
             });
             validateMural(mural);
-            return mural;
+            output.push(mural);
         }
     }
+    return output;
 }
 
 export function getQuantizedObjFromUser(quantized: QuantResult[]) {
@@ -470,31 +472,48 @@ export function imageDataToCanvas(imageData: ImageData) {
     return canvas;
 }
 
-async function importFile() {
+async function importFiles() {
     const fileInput = new FileInput();
-    fileInput.setAcceptType(["png", "jpg", "jpeg", ...TEXT_FORMATS, ...BIN_FORMATS]);
+    const images = ["png", "jpg", "jpeg"];
+    fileInput.setAcceptType([...images, ...TEXT_FORMATS, ...BIN_FORMATS]);
+    fileInput.allowMultiple(true);
     const files = await fileInput.show();
-    const fileData = files[0];
-    if (!fileData) {
+    const filteredFiles = [...files].filter(e => e);
+    if (!filteredFiles.length) {
         throw new Error("Empty file");
     }
-    const ex = getExtension(fileData.name);
+    const imagesFiles = filteredFiles
+        .filter(e => images.some(r => e.name.toLowerCase().endsWith(r)));
+
+    if (imagesFiles.length > 1) {
+        throw new Error("Only one image files allowed to be imported at the time");
+    }
+
+    const output: ({
+        type: "mural",
+        data: MuralOld
+    } | {
+        type: "image",
+        data: HTMLImageElement
+    })  [] = [];
+    for (const file of filteredFiles) {
+        const ex = getExtension(file.name);
         const etn = ex.ex.toLowerCase();
         const name = ex.text;
         if (TEXT_FORMATS.includes(etn)) {
-        const content = await readAsString(fileData);
+            const content = await readAsString(file);
             const mural = JSON.parse(content) as MuralOld;
             if (!mural.name) {
                 mural.name = await Popup
                     .prompt("Missing name for this mural. Please enter it manually", name) || "";
             }
     
-        return {
+            output.push({
                 type: "mural",
                 data: mural,
-        };
+            });
         } else if (BIN_FORMATS.includes(etn)) {
-        const buffer = await readAsArrayBuffer(fileData);
+            const buffer = await readAsArrayBuffer(file);
             const mural = await Mural.from(new Uint8Array(buffer));
             const pixelBuffer = mural.pixelBuffer;
             const pixels = Array.from({ length: mural.h }, () => Array(mural.w).fill(0));
@@ -518,17 +537,19 @@ async function importFile() {
                     }
                 }
             }
-        return {
+            output.push({
                 type: "mural",
                 data: {
                     name, x: mural.x, y: mural.y, pixels,
                 },
-        };
+            });
         } else {
-        const readData = await readAsDataUrl(fileData);
-        return {
+            const readData = await readAsDataUrl(file);
+            output.push({
                 type: "image",
                 data: await loadImageSource(`${ex.text}.${ex.ex}`, readData),
-        };
+            });
         }
     }
+    return output;
+}