Add notice about dearrow, make dearrow links not appear if dearrow installed

src/utils/crossExtension.ts

@@ -0,0 +1,44 @@
+import * as CompileConfig from "../../config.json";
+
+import Config from "../config";
+import { isSafari } from "@ajayyy/maze-utils/lib/config";
+import { isFirefoxOrSafari } from "@ajayyy/maze-utils";
+
+export function isDeArrowInstalled(): Promise<boolean> {
+    if (Config.config.deArrowInstalled) {
+        return Promise.resolve(true);
+    } else {
+        return new Promise((resolve) => {
+            const extensionIds = getExtensionIdsToImportFrom();
+
+            let count = 0;
+            for (const id of extensionIds) {
+                chrome.runtime.sendMessage(id, { message: "isInstalled" }, (response) => {
+                    if (chrome.runtime.lastError) {
+                        count++;
+
+                        if (count === extensionIds.length) {
+                            resolve(false);
+                        }
+                        return;
+                    }
+
+                    resolve(response);
+                    if (response) {
+                        Config.config.deArrowInstalled = true;
+                    }
+                });
+            }
+        });
+    }
+}
+
+export function getExtensionIdsToImportFrom(): string[] {
+    if (isSafari()) {
+        return CompileConfig.extensionImportList.safari;
+    } else if (isFirefoxOrSafari()) {
+        return CompileConfig.extensionImportList.firefox;
+    } else {
+        return CompileConfig.extensionImportList.chromium;
+    }
+}