New feature - Restock / stock / out of stock monitor option/mode

changedetectionio/res/stock-not-in-stock.js

@@ -0,0 +1,56 @@
+function isItemInStock() {
+  // @todo Pass these in so the same list can be used in non-JS fetchers
+  const outOfStockTexts = [
+    '0 in stock',
+    'agotado',
+    'artikel zurzeit vergriffen',
+    'available for back order',
+    'backordered',
+    'brak w magazynie',
+    'brak na stanie',
+    'coming soon',
+    'currently unavailable',
+    'en rupture de stock',
+    'as soon as stock is available',
+    'message if back in stock',
+    'nachricht bei',
+    'nicht auf lager',
+    'nicht lieferbar',
+    'nicht zur verfügung',
+    'no disponible temporalmente',
+    'not in stock',
+    'out of stock',
+    'out-of-stock',
+    'não estamos a aceitar encomendas',
+    'produkt niedostępny',
+    'no longer in stock',
+    'sold out',
+    'temporarily out of stock',
+    'temporarily unavailable',
+    'we do not currently have an estimate of when this product will be back in stock.',
+    'zur zeit nicht an lager',
+  ];
+
+  const elementsWithZeroChildren = Array.from(document.getElementsByTagName('*')).filter(element => element.children.length === 0);
+  for (let i = elementsWithZeroChildren.length - 1; i >= 0; i--) {
+    const element = elementsWithZeroChildren[i];
+    if (element.offsetWidth > 0 || element.offsetHeight > 0 || element.getClientRects().length > 0) {
+      var elementText="";
+      if (element.tagName.toLowerCase() === "input") {
+        elementText = element.value.toLowerCase();
+      } else {
+        elementText = element.textContent.toLowerCase();
+      }
+
+      for (const outOfStockText of outOfStockTexts) {
+        if (elementText.includes(outOfStockText)) {
+          return elementText; // item is out of stock
+        }
+      }
+    }
+  }
+  return 'Possibly in stock'; // possibly in stock, cant decide otherwise.
+}
+
+// returns the element text that makes it think it's out of stock
+return isItemInStock();