ProgressBar instead of Loading-Spinner

Flexible Progressbar which shows the state loading/encoding of the json files

site/_templates/_loader.html

@@ -1,42 +1,4 @@
-<img x-id="loader" class="mx-auto mt-8" src="data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMTM1IiBoZWlnaHQ9IjE0MCIgdmlld0JveD0iMCAwIDEzNSAxNDAiIHhtbG5
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+<div x-id="loader" class="progress-bar-container mx-auto mt-8">
+    <div class="progress-bar"></div>
+</div>
+

site/cart.js

@@ -208,5 +208,4 @@ function loadCart() {
     productsList.model = productsFilter.model = models.items;
     if (c || d) itemsChart.render();
     cartFilter.filter();
-    document.querySelector('[x-id="loader"]').classList.add("hidden");
 })();

site/carts.js

@@ -71,5 +71,4 @@ function importCarts(importedCarts) {
         };
         reader.readAsText(event.target.files[0]);
     });
-    document.querySelector('[x-id="loader"]').classList.add("hidden");
 })();

site/changes.js

@@ -38,5 +38,4 @@ require("./views");
     }
     itemsFilter.model = itemsList.model = model.items;
     itemsFilter.fireChangeEvent();
-    document.querySelector('[x-id="loader"]').classList.add("hidden");
 })();

site/index.js

@@ -41,5 +41,4 @@ require("./views");
     }
     itemsFilter.model = itemsList.model = model.items;
     itemsFilter.fireChangeEvent();
-    document.querySelector('[x-id="loader"]').classList.add("hidden");
 })();

site/js/progress-bar.js

@@ -0,0 +1,31 @@
+class ProgressBar {
+    constructor(steps) {
+        this.progress = 0;
+        this.steps = steps ?? 0;
+        this.step = 100 / this.steps;
+        this.container = document.querySelector('[x-id="loader"]');
+        this.progressBar = this.container.querySelector(".progress-bar");
+    }
+
+    setSteps(steps) {
+        this.steps = steps;
+        this.step = 100 / steps;
+    }
+
+    addStep() {
+        this.progress += this.step;
+        this.progressBar.style.transform = `scaleX(${this.progress / 100})`;
+        if (this.progress >= 100) {
+            this.finished();
+        }
+    }
+
+    finished() {
+        const element = this.container;
+        setTimeout(function () {
+            element.classList.add("hidden");
+        }, 250);
+    }
+}
+
+exports.ProgressBar = ProgressBar;

site/model/items.js

@@ -2,6 +2,9 @@ const { Model } = require("./model");
 const { STORE_KEYS } = require("./stores");
 const { Settings } = require("./settings");
 const { log, deltaTime } = require("../js/misc");
+const { ProgressBar } = require("../js/progress-bar");
+
+const Bar = new ProgressBar(STORE_KEYS.length);
 
 class Items extends Model {
     constructor() {
@@ -32,6 +35,7 @@ class Items extends Model {
         const settings = new Settings();
         let start = performance.now();
         const compressedItemsPerStore = [];
+
         for (const store of STORE_KEYS) {
             compressedItemsPerStore.push(
                 new Promise(async (resolve) => {
@@ -48,9 +52,11 @@ class Items extends Model {
                         log(`Loader - error while loading compressed items for ${store} ${e.message}`);
                         resolve([]);
                     }
+                    Bar.addStep();
                 })
             );
         }
+
         let items = [].concat(...(await Promise.all(compressedItemsPerStore)));
         log(`Loader - loaded ${items.length} items took ${deltaTime(start).toFixed(4)} secs`);
 

site/style.css

@@ -246,3 +246,20 @@ thead > tr {
 a {
     @apply hover:underline;
 }
+
+/* loading-bar */
+.progress-bar-container {
+    @apply bg-stone-200 rounded-xl;
+    width: 300px;
+    height: 10px;
+}
+
+.progress-bar {
+    @apply bg-primary rounded-xl;
+    height: 10px;
+    transform: scaleX(0%);
+    will-change: transform;
+    transition: scaleX 0.5s;
+    width: 100%;
+    transform-origin: left center;
+}