owntone-server/web-src/src/pages/PageComposers.vue

<template>
  <div>
    <tabs-music />

    <content-with-heading>
      <template #options>
        <index-button-list :index="composers_list.indexList" />
      </template>
      <template #heading-left>
        <p class="title is-4">
          {{ heading }}
        </p>
        <p class="heading">{{ composers.total }} composers</p>
      </template>
      <template #content>
        <list-composers :composers="composers_list" />
      </template>
    </content-with-heading>
  </div>
</template>

<script>
import ContentWithHeading from '@/templates/ContentWithHeading.vue'
import TabsMusic from '@/components/TabsMusic.vue'
import IndexButtonList from '@/components/IndexButtonList.vue'
import ListComposers from '@/components/ListComposers.vue'
import webapi from '@/webapi'
import Composers from '@/lib/Composers'

const dataObject = {
  load: function (to) {
    return webapi.library_composers()
  },

  set: function (vm, response) {
    if (response.data.composers) {
      vm.composers = response.data.composers
      vm.heading = vm.$route.params.genre
    } else {
      vm.composers = response.data
      vm.heading = 'Composers'
    }
  }
}

export default {
  name: 'PageComposers',
  components: { ContentWithHeading, TabsMusic, IndexButtonList, ListComposers },

  beforeRouteEnter(to, from, next) {
    dataObject.load(to).then((response) => {
      next((vm) => dataObject.set(vm, response))
    })
  },
  beforeRouteUpdate(to, from, next) {
    const vm = this
    dataObject.load(to).then((response) => {
      dataObject.set(vm, response)
      next()
    })
  },

  data() {
    return {
      composers: { items: [] },
      heading: '',

      show_details_modal: false,
      selected_composer: {}
    }
  },

  computed: {
    index_list() {
      return [
        ...new Set(
          this.composers.items.map((composer) =>
            composer.name.charAt(0).toUpperCase()
          )
        )
      ]
    },

    composers_list() {
      return new Composers(this.composers.items, {
        sort: 'Name',
        group: true
      })
    }
  },

  methods: {
    open_composer: function (composer) {
      this.$router.push({
        name: 'ComposerAlbums',
        params: { composer: composer.name }
      })
    },

    open_dialog: function (composer) {
      this.selected_composer = composer
      this.show_details_modal = true
    }
  }
}
</script>

<style></style>