frontend/src/features/i18n/components/LanguageSwitchButton.vue

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you may not use this file except in compliance with the License.
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<script setup>
import Icon from '@/features/icons/components/Icon.vue';

import { ref } from 'vue';
import { useI18n } from 'vue-i18n';
import { loadLanguage, LANGUAGES_RTL, SUPPORTED_LANGUAGES } from '@/i18n';

const { t, locale } = useI18n();

const isOpen = ref(false);
const languageDropdown = ref(null);

async function selectLanguage(code) {
    await loadLanguage(code);
    localStorage.setItem('locale', code);
    document.documentElement.lang = code;
    document.documentElement.dir = LANGUAGES_RTL.includes(code) ? 'rtl' : 'ltr';
    close();
};

const close = function () {
    document.removeEventListener('click', closeWrapperOnClickOutsite);
    isOpen.value = false;
};

const closeWrapperOnClickOutsite = function (e) {
    if (languageDropdown.value) {
        if (!languageDropdown.value.contains(e.target)) {
            close();
        };
    };
};

const open = function () {
    if (!isOpen.value) {
        isOpen.value = true;
        setTimeout(() => {
            document.addEventListener('click', closeWrapperOnClickOutsite);
        }, 0);
    };
};
</script>

<template>
    <div class="language-switch" tabindex="-1">
        <button
            class="language-button button"
            @click="open"
            :aria-expanded="isOpen"
            aria-haspopup="listbox"
        >
            <span class="lang-code">{{ t(`preferences.locale.languages.${locale}`) }}</span>
            <span class="chevron" :class="{ open: isOpen }">
                <Icon name="chevron-down" size="1em" />
            </span>
        </button>

        <ul
            v-if="isOpen"
            ref="languageDropdown"
            class="language-dropdown"
            role="listbox"
            :style="{
                bottom: 'calc(var(--offset) + 2 * var(--trigger-padding-y) + 1em)' // easier to add auto adaption to the available space
            }"
        >
            <li
                v-for="lang in SUPPORTED_LANGUAGES"
                :key="lang"
                role="option"
                :aria-selected="lang === locale"
                :class="{ active: lang === locale }"
                @click="selectLanguage(lang)"
            >
                <span class="lang-label">{{ t(`preferences.locale.languages.${lang}`) }}</span>
            </li>
        </ul>
    </div>
</template>

<style scoped>
.language-switch {
    --trigger-padding-y: 4px;
    position: relative;
}

.language-button {
    display: flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: var(--trigger-padding-y) 10px;
    cursor: pointer;
    color: var(--dark);
}

.language-button:hover {
    background-color: var(--light-hover);
}

.chevron {
    font-size: 0.75rem;
    transition: transform 0.2s;
    display: inline-block;
}

.chevron.open {
    transform: rotate(180deg);
}

.language-dropdown {
    --offset: 6px;
    position: absolute;
    right: 0;
    background-color: var(--light-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    list-style: none;
    margin: 0;
    padding: 6px 0;
    min-width: 160px;
    z-index: 100;
}

.language-dropdown li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    cursor: pointer;
    font-size: 0.9rem;
}

.language-dropdown li:hover {
    background-color: var(--light-hover);
}

.language-dropdown li.active {
    font-weight: bold;
}

.flag {
    font-size: 1.1rem;
}
</style>