refactor(funbox): remove isCharCorrect function (@Leonabcd123) (#8156)

`arrows` funbox doesn't need it, no other funbox defines it.

Author: Leonabcd123

frontend/src/ts/input/handlers/insert-text.ts

@@ -18,10 +18,7 @@ import {
 } from "../../utils/strings";
 import * as TestState from "../../test/test-state";
 import * as TestLogic from "../../test/test-logic";
-import {
-  findSingleActiveFunboxWithFunction,
-  isFunboxActiveWithProperty,
-} from "../../test/funbox/list";
+import { isFunboxActiveWithProperty } from "../../test/funbox/list";
 import { Config } from "../../config/store";
 import { flash } from "../../events/keymap";
 import * as WeakSpot from "../../test/weak-spot";
@@ -160,20 +157,12 @@ export async function onInsertText(options: OnInsertTextParams): Promise<void> {
     Config.oppositeShiftMode === "off" ? null : isCorrectShiftUsed();
 
   // is char correct
-  const funboxCorrect = findSingleActiveFunboxWithFunction(
-    "isCharCorrect",
-  )?.functions.isCharCorrect(
+  const charCorrect = isCharCorrect({
     data,
-    currentWord[(testInput + data).length - 1] ?? "",
-  );
-  const charCorrect =
-    funboxCorrect ??
-    isCharCorrect({
-      data,
-      inputValue: testInput,
-      targetWord: currentWord,
-      correctShiftUsed,
-    });
+    inputValue: testInput,
+    targetWord: currentWord,
+    correctShiftUsed,
+  });
 
   // word navigation check
   const noSpaceForce =
@@ -186,13 +175,12 @@ export async function onInsertText(options: OnInsertTextParams): Promise<void> {
   // when moving to the next word, correctness is word-level (a correct word-completing
   // space has charCorrect === false, so charCorrect can't be used below)
   const correct = goingToNextWord
-    ? (funboxCorrect ??
-      isWordCorrect({
+    ? isWordCorrect({
         data,
         inputValue: testInput,
         targetWord: currentWord,
         correctShiftUsed,
-      }))
+      })
     : charCorrect;
 
   // handing cases where last char needs to be removed

frontend/src/ts/test/funbox/funbox-functions.ts

@@ -42,7 +42,6 @@ export type FunboxFunctions = {
   pullSection?: (language?: Language) => Promise<JSONData.Section | false>;
   handleSpace?: () => void;
   getEmulatedChar?: (event: KeyboardEvent) => string | null;
-  isCharCorrect?: (char: string, originalChar: string) => boolean;
   handleKeydown?: (event: KeyboardEvent) => Promise<void>;
   getResultContent?: () => string;
   start?: () => void;
@@ -261,42 +260,6 @@ const list: Partial<Record<FunboxName, FunboxFunctions>> = {
       }
       return null;
     },
-    isCharCorrect(char: string, originalChar: string): boolean {
-      if (
-        (char === "a" ||
-          char === "ArrowLeft" ||
-          char === "j" ||
-          char === "←") &&
-        originalChar === "←"
-      ) {
-        return true;
-      }
-      if (
-        (char === "s" ||
-          char === "ArrowDown" ||
-          char === "k" ||
-          char === "↓") &&
-        originalChar === "↓"
-      ) {
-        return true;
-      }
-      if (
-        (char === "w" || char === "ArrowUp" || char === "i" || char === "↑") &&
-        originalChar === "↑"
-      ) {
-        return true;
-      }
-      if (
-        (char === "d" ||
-          char === "ArrowRight" ||
-          char === "l" ||
-          char === "→") &&
-        originalChar === "→"
-      ) {
-        return true;
-      }
-      return false;
-    },
     getWordHtml(char: string, letterTag?: boolean): string {
       let retval = "";
       if (char === "↑") {

packages/funbox/src/list.ts

@@ -108,7 +108,6 @@ const list: Record<FunboxName, FunboxMetadata> = {
       "getWord",
       "rememberSettings",
       "getEmulatedChar",
-      "isCharCorrect",
       "getWordHtml",
     ],
     name: "arrows",

packages/funbox/src/validation.ts

@@ -178,10 +178,6 @@ export function checkCompatibility(
     funboxesToCheck.filter((f) =>
       f.frontendFunctions?.includes("getEmulatedChar"),
     ).length <= 1;
-  const oneCharCheckerMax =
-    funboxesToCheck.filter((f) =>
-      f.frontendFunctions?.includes("isCharCorrect"),
-    ).length <= 1;
   const oneCharReplacerMax =
     funboxesToCheck.filter((f) => f.frontendFunctions?.includes("getWordHtml"))
       .length <= 1;
@@ -240,7 +236,6 @@ export function checkCompatibility(
     oneToPushOrPullSectionMax &&
     onePunctuateWordMax &&
     oneGetEmulatedCharMax &&
-    oneCharCheckerMax &&
     oneCharReplacerMax &&
     oneChangesCapitalisationMax &&
     oneCssModificationPerElement &&