feat(view): set price based on product select on first line from purchase.

tienda_ilusion/don_confiao/static/js/buy_general.js

@@ -0,0 +1,25 @@
+setPriceListeners();
+
+function setPriceListeners() {
+    document.querySelectorAll('select[id^="id_saleline_set-"][id$="-product"]').forEach((input) => {
+        console.log('setPriceListenersForeach');
+        console.log(input.id);
+        input.addEventListener('change', (e) => setLinePrice(e));
+    });
+}
+
+function setLinePrice(e) {
+    console.log('setLinePrice');
+    let input = e.target;
+    const idLine = input.id.split('-')[1];
+    const productId = input.value;
+    const priceInput = document.getElementById(`id_saleline_set-${idLine}-unit_price`);
+
+    const product = listProducts.find((product) => product.id == productId);
+    if (product) {
+        priceInput.value = product.price_list;
+    } else {
+        priceInput.value = '';
+    }
+}
+