move local storage methods to misc.ts

Author: neverRare

src/local_storage.ts

@@ -11,10 +11,7 @@ import {
 } from "./dictionary/dictionary.ts";
 import { parseDictionary } from "./dictionary/parser.ts";
 import { Dictionary } from "./dictionary/type.ts";
-import {
-  assertQuotaExceededError,
-  checkLocalStorage,
-} from "./local_storage.ts";
+import { assertQuotaExceededError, checkLocalStorage } from "./misc/misc.ts";
 import { hasXAlaX } from "./parser/lexer.ts";
 import { Position, PositionedError } from "./parser/parser_lib.ts";
 import { settings } from "./settings.ts";

src/main.ts

@@ -45,3 +45,36 @@ export function lazy<T>(fn: () => T): () => T {
     return value!;
   };
 }
+export const checkLocalStorage = lazy((): boolean => {
+  // https://developer.mozilla.org/en-US/docs/Web/API/Web_Storage_API/Using_the_Web_Storage_API
+  try {
+    const x = "__storage_test__";
+    localStorage.setItem(x, x);
+    localStorage.removeItem(x);
+    return true;
+  } catch (e) {
+    return e instanceof DOMException &&
+      e.name === "QuotaExceededError" &&
+      // acknowledge QuotaExceededError only if there's something already stored
+      localStorage &&
+      localStorage.length !== 0;
+  }
+});
+
+export function setIgnoreError(key: string, value: string): void {
+  if (checkLocalStorage()) {
+    try {
+      localStorage.setItem(key, value);
+    } catch (error) {
+      assertQuotaExceededError(error);
+    }
+  }
+}
+
+export function assertQuotaExceededError(error: unknown): void {
+  if (
+    !(error instanceof DOMException) || error.name !== "QuotaExceededError"
+  ) {
+    throw error;
+  }
+}

src/misc/misc.ts

@@ -1,7 +1,7 @@
 // this code is browser only
 
 import { toKebabCase } from "@std/text/to-kebab-case";
-import { checkLocalStorage, setIgnoreError } from "./local_storage.ts";
+import { checkLocalStorage, setIgnoreError } from "./misc/misc.ts";
 import { defaultSettings, Redundancy, Settings, settings } from "./settings.ts";
 
 type Updater<T> = Readonly<{