Feat/Add LocaleSwitch component

apps/web/app/components/FooterPageSection.vue

@@ -39,11 +39,11 @@ const snsLinkList: LinkList[] = [
 const internalLinkList: LinkList[] = [
   {
     href: '/privacy',
-    text: t('privacy.title'),
+    text: 'privacy.title',
   },
   {
     href: '/code-of-conduct',
-    text: t('code_of_conduct.title'),
+    text: 'code_of_conduct.title',
   },
 ]
 const vueFesLinkList: LinkList[] = [
@@ -86,14 +86,14 @@ const vueFesLinkList: LinkList[] = [
         <ul class="footer-list">
           <li v-for="(link, index) in internalLinkList" :key="index">
             <VFTextLink :href="`${localePath}${link.href}`" color="white">
-              {{ link.text }}
+              {{ t(link.text) }}
             </VFTextLink>
           </li>
         </ul>
         <ul class="footer-list">
           <li v-for="(link, index) in vueFesLinkList" :key="index">
             <VFTextLink :href="link.href" target="_blank" color="white">
-              {{ link.text }}
+              {{ t(link.text) }}
             </VFTextLink>
           </li>
         </ul>

packages/ui/.storybook/preview.js

@@ -1,6 +1,7 @@
 import { setup } from '@storybook/vue3'
 import { INITIAL_VIEWPORTS } from '@storybook/addon-viewport'
 import { createI18n } from 'vue-i18n'
+import { createRouter, createMemoryHistory } from 'vue-router'
 
 import './global.css'
 
@@ -33,14 +34,29 @@ const i18n = createI18n({
       // end dummy
       sponsor: {
         start_date: 'April 8',
-        end_date: '25,',  
+        end_date: '25,',
       },
     },
   },
 })
 
+const routes = [
+  {
+    path: '/',
+    name: 'ja',
+  },
+  {
+    path: '/en',
+    name: 'en',
+  },
+]
+
+// 画面遷移は発生しないが、StorybookではURLを直接使えないため、createMemoryHistoryで生成
+const router = createRouter({ history: createMemoryHistory(), routes })
+
 setup((app) => {
   app.use(i18n)
+  app.use(router)
 })
 
 export const parameters = {

packages/ui/components/common/LocaleSwitch.stories.ts

@@ -0,0 +1,17 @@
+import { StoryFn } from '@storybook/vue3'
+import LocaleSwitch from './LocaleSwitch.vue'
+
+export default {
+  title: 'common/LocaleSwitch',
+  component: LocaleSwitch,
+}
+
+const Template: StoryFn<unknown> = () => ({
+  components: { LocaleSwitch },
+  setup() {
+    return {}
+  },
+  template: '<LocaleSwitch />',
+})
+
+export const Default = Template.bind({})

packages/ui/components/common/LocaleSwitch.vue

@@ -0,0 +1,148 @@
+<script setup lang="ts">
+import { onMounted, ref, watch } from 'vue'
+import { useRouter } from 'vue-router'
+
+const LANGUAGES = {
+  JAPANESE: 'ja',
+  ENGLISH: 'en',
+} as const
+
+const router = useRouter()
+const isLoaded = ref(false)
+const isChecked = ref(false)
+
+const getPath = () => {
+  if (isChecked.value) {
+    return `/${LANGUAGES.ENGLISH}${router.currentRoute.value.path}`
+  }
+  return router.currentRoute.value.path.replace(`/${LANGUAGES.ENGLISH}`, '')
+}
+const setSwitchStatus = () => {
+  isChecked.value = router.currentRoute.value.path.includes(LANGUAGES.ENGLISH)
+}
+
+const toggleStatus = () => {
+  isChecked.value = !isChecked.value
+  const path = getPath()
+  // トレイリングスラッシュ対策
+  if (path === '') {
+    router.push('/')
+    return
+  }
+  router.push(path)
+}
+onMounted(() => {
+  setSwitchStatus()
+  isLoaded.value = true
+})
+watch(
+  () => router.currentRoute.value.path,
+  () => {
+    setSwitchStatus()
+  },
+)
+</script>
+
+<template>
+  <button
+    v-if="isLoaded"
+    type="button"
+    role="switch"
+    class="locale-switch-button"
+    aria-label="translate english"
+    :aria-checked="isChecked"
+    @click="toggleStatus"
+  >
+    <span
+      class="locale-switch-button-switch"
+      :class="{ 'locale-switch-button-switch-checked': !isChecked }"
+      aria-hidden="true"
+    >
+      <span
+        v-if="isChecked"
+        class="locale-switch-button-language"
+        :class="{ 'locale-switch-button-language-checked': !isChecked }"
+      >
+        <span>{{ LANGUAGES.JAPANESE }}</span>
+      </span>
+      <span class="locale-switch-button-circle">
+        {{ isChecked ? LANGUAGES.ENGLISH : LANGUAGES.JAPANESE }}
+      </span>
+      <span
+        v-if="!isChecked"
+        class="locale-switch-button-language"
+        :class="{ 'locale-switch-button-language-checked': isChecked }"
+      >
+        <span>{{ LANGUAGES.ENGLISH }}</span>
+      </span>
+    </span>
+  </button>
+</template>
+
+<style scoped>
+* {
+  --box-shadow: 0 1px 4px color-mix(in srgb, var(--color-vue-blue), transparent calc(100% - 14%));
+}
+
+.locale-switch-button {
+  border: 0;
+  user-select: none;
+  line-height: 1.2;
+  width: 5.125rem;
+  height: 2.5rem;
+  display: grid;
+  place-content: center;
+  color: var(--color-white);
+  background-color: transparent;
+  position: relative;
+}
+
+.locale-switch-button-switch {
+  display: flex;
+  align-items: center;
+  box-shadow: var(--box-shadow);
+  background-color: #d2d6db;
+  border-radius: 0.9375rem;
+  height: 1.8125rem;
+  width: 3.5625rem;
+  font-size: 1.125rem;
+  font-weight: bold;
+  padding-left: 0.5rem;
+  box-sizing: border-box;
+}
+
+.locale-switch-button-switch-checked {
+  justify-content: flex-end;
+  padding-left: 0;
+  padding-right: 0.5rem;
+}
+
+.locale-switch-button-language {
+  font-size: 0.875rem;
+  font-weight: bold;
+}
+
+.locale-switch-button-circle {
+  position: absolute;
+  display: flex;
+  justify-content: center;
+  padding-top: 0.25rem;
+  box-sizing: border-box;
+  border-radius: 50%;
+  top: calc(50% - 1rem);
+  right: 50%;
+  height: 2rem;
+  width: 2rem;
+  background: #34495e;
+  box-shadow: var(--box-shadow);
+}
+
+.locale-switch-button[aria-checked='true'] .locale-switch-button-circle {
+  right: 0;
+  left: 50%;
+}
+
+.locale-switch-button:hover {
+  cursor: pointer;
+}
+</style>