fix(frontend): Allow IDs to be typed

src/frontend/src/routes/+page.svelte

@@ -26,17 +26,33 @@
       : "") +
     `&mode=${mode}`;
 
+  function is_all_digits(text) {
+    // Thanks https://stackoverflow.com/a/76688650
+    let allDigits = true;
+    if (!text.isEmpty()) {
+      for (i = 0; i < text.length(); i++) {
+        if (!Character.isDigit(text.charAt(i))) {
+          allDigits = false;
+          break;
+        }
+      }
+    }
+    return allDigits;
+  }
+
   $: {
     if (input_url.length) {
       input_url = input_url.toLowerCase();
 
       invalid_url = false;
-      if (!input_url.includes("wattpad.com/")) {
-        invalid_url = true;
-      }
 
-      // Originally, I was going to call the Wattpad API (wattpad.com/api/v3/stories/${story_id}), but Wattpad kept blocking those requests. I suspect it has something to do with the Origin header, I wasn't able to remove it.
+      if (/^\d+$/.test(input_url)) {
-      // In the future, if this is considered, it would be cool if we could derive the Story ID from a pasted Part URL. Refer to @AaronBenDaniel's https://github.com/AaronBenDaniel/WattpadDownloader/blob/49b29b245188149f2d24c0b1c59e4c7f90f289a9/src/api/src/create_book.py#L156 (https://www.wattpad.com/api/v3/story_parts/{part_id}?fields=url).
+        // All numbers
+        console.log("1");
+        download_id = input_url;
+        mode = "story";
+      } else if (input_url.includes("wattpad.com/")) {
+        // Is a string and contains contain wattpad.com/
 
         if (input_url.includes("/story/")) {
           // https://wattpad.com/story/237369078-wattpad-books-presents
@@ -61,6 +77,18 @@
             download_id = "";
           }
         }
+      } else {
+        invalid_url = true;
+      }
+
+      input_url = input_url.match(/\d+/g)?.join("") || "";
+      download_id = input_url;
+
+      // Originally, I was going to call the Wattpad API (wattpad.com/api/v3/stories/${story_id}), but Wattpad kept blocking those requests. I suspect it has something to do with the Origin header, I wasn't able to remove it.
+      // In the future, if this is considered, it would be cool if we could derive the Story ID from a pasted Part URL. Refer to @AaronBenDaniel's https://github.com/AaronBenDaniel/WattpadDownloader/blob/49b29b245188149f2d24c0b1c59e4c7f90f289a9/src/api/src/create_book.py#L156 (https://www.wattpad.com/api/v3/story_parts/{part_id}?fields=url).
+    } else {
+      invalid_url = false;
+      download_id = "";
     }
   }
 </script>