add error to ankiconnect mining

background-script.js

@@ -1418,6 +1418,14 @@ async function get_real_platform()
 }
 get_real_platform();
 
+function send_error(tab, error)
+{
+    try
+    {
+        browser.tabs.sendMessage(tab, {type:"error",error:error});
+    } catch (err) {}
+}
+
 browser.runtime.onMessage.addListener((req, sender) =>
 {
     if (req.type == "search")
@@ -1449,6 +1457,16 @@ browser.runtime.onMessage.addListener((req, sender) =>
         xhr.addEventListener('load', () =>
         {
             let response = JSON.parse(xhr.responseText);
+            if(response.error)
+                send_error(sender.tab.id, "AnkiConnect mining failed: " + response.error);
+        });
+        xhr.addEventListener('error', () =>
+        {
+            send_error(sender.tab.id, "AnkiConnect mining failed: unspecified error (Anki is probably not open)");
+        });
+        xhr.addEventListener('timeout', () =>
+        {
+            send_error(sender.tab.id, "AnkiConnect mining failed: timed out");
         });
         xhr.send(req.command);
     }

options.js

@@ -590,6 +590,7 @@ function buildpage()
         let reader = new FileReader();
         reader.onload = async(e) =>
         {
+            // FIXME: add asking for the unlimited storage permission
             try
             {
                 browser.storage.local.set({"epwing":JSON.stringify(JSON.parse(e.target.result))});
@@ -666,8 +667,6 @@ This format can be extended in the future if it becomes desirable to include mor
         let a = document.createElement("a");
         a.href = url;
         a.download = "nazeka_data_backup.json";
-        console.log("trying to virtually click this a element:");
-        console.log(a);
         document.body.appendChild(a);
         a.click();
         document.body.removeChild(a);
@@ -699,6 +698,7 @@ This format can be extended in the future if it becomes desirable to include mor
         };
         reader.readAsText(fname);
     });
+    // FIXME: add asking for the unlimited storage permission
     let backup_load_label = document.createElement("label");
     backup_load_label.for = backup_save.id;
     backup_load_label.id = "backup_load_label";

texthook.js

@@ -1607,11 +1607,11 @@ function update_touch(event)
     }
 }
 
-function message(text)
+function errormessage(text)
 {
     if(!text) return;
     let mydiv = document.createElement("div");
-    mydiv.style = "background-color: rgba(0, 0, 0, 0.5); color: white; width: 200px; position: fixed; right: 25px; bottom: 25px; z-index: 1000000000000000000000; padding: 5px; border-radius: 3px;"
+    mydiv.style = "background-color: #111; color: #CCC; font-family: Arial, sans-serif; font-size: 13px; width: 300px; border: 3px double red; position: fixed; right: 25px; top: 25px; z-index: 1000000000000000000000; padding: 5px; border-radius: 3px;"
     mydiv.textContent = text;
     document.body.appendChild(mydiv);
     
@@ -1623,6 +1623,12 @@ function message(text)
     setTimeout(delete_later, 3000);
 }
 
+browser.runtime.onMessage.addListener((req, sender) =>
+{
+    if (req.type == "error")
+        errormessage(req.error);
+});
+
 async function mine_to_storage(object)
 {
     let cards = (await browser.storage.local.get("cards")).cards;