refactor(dx): generic data transformer

src/components/FormatTransformer.vue

@@ -0,0 +1,57 @@
+<template>
+  <n-form-item :label="inputLabel" v-bind="validationAttrs">
+    <n-input
+      ref="inputElement"
+      v-model:value="input"
+      :placeholder="inputPlaceholder"
+      type="textarea"
+      rows="20"
+      autocomplete="off"
+      autocorrect="off"
+      autocapitalize="off"
+      spellcheck="false"
+      :input-props="{ 'data-test-id': 'input' }"
+    />
+  </n-form-item>
+  <n-form-item :label="outputLabel">
+    <textarea-copyable :value="output" :language="outputLanguage" :follow-height-of="inputElement" />
+  </n-form-item>
+</template>
+
+<script setup lang="ts">
+import { useValidation, type UseValidationRule } from '@/composable/validation';
+import _ from 'lodash';
+
+const props = withDefaults(
+  defineProps<{
+    transformer?: (v: string) => string;
+    inputValidationRules?: UseValidationRule<string>[];
+    inputLabel?: string;
+    inputPlaceholder?: string;
+    inputDefault?: string;
+    outputLabel?: string;
+    outputLanguage?: string;
+  }>(),
+  {
+    transformer: _.identity,
+    inputValidationRules: () => [],
+    inputLabel: 'Input',
+    inputDefault: '',
+    inputPlaceholder: 'Input...',
+    outputLabel: 'Output',
+    outputLanguage: '',
+  },
+);
+
+const { transformer, inputValidationRules, inputLabel, outputLabel, outputLanguage, inputPlaceholder, inputDefault } =
+  toRefs(props);
+
+const inputElement = ref();
+
+const input = ref(inputDefault.value);
+const output = computed(() => transformer.value(input.value));
+
+const { attrs: validationAttrs } = useValidation({ source: input, rules: inputValidationRules.value });
+</script>
+
+<style scoped></style>

src/components/TextareaCopyable.vue

@@ -7,7 +7,7 @@
         :style="height ? `min-height: ${height - 40 /* card padding */ + 10 /* negative margin compensation */}px` : ''"
       >
         <n-config-provider :hljs="hljs">
-          <n-code :code="value" :language="language" :trim="false" />
+          <n-code :code="value" :language="language" :trim="false" data-test-id="area-content" />
         </n-config-provider>
       </n-scrollbar>
       <n-tooltip v-if="value" trigger="hover">