Fix play button in albums with multi-page volumes

changes/changelog.d/1928.bugfix

@@ -0,0 +1 @@
+Fix play button in albums with multi-page volumes (#1928)

front/src/components/library/AlbumBase.vue

@@ -3,7 +3,7 @@ import type { Track, Album, Artist, Library } from '~/types'
 
 import { momentFormat } from '~/utils/filters'
 import { useGettext } from 'vue3-gettext'
-import { computed, ref, watch } from 'vue'
+import { computed, reactive, ref, watch } from 'vue'
 import { useRouter } from 'vue-router'
 import { sum } from 'lodash-es'
 
@@ -29,9 +29,7 @@ const props = defineProps<Props>()
 
 const object = ref<Album | null>(null)
 const artist = ref<Artist | null>(null)
-const discs = ref([] as Track[][])
 const libraries = ref([] as Library[])
-const page = ref(1)
 const paginateBy = ref(50)
 
 const totalTracks = computed(() => object.value?.tracks_count ?? 0)
@@ -51,18 +49,7 @@ const fetchData = async () => {
   isLoading.value = true
 
   const albumResponse = await axios.get(`albums/${props.id}/`, { params: { refresh: 'true' } })
-  const [artistResponse, tracksResponse] = await Promise.all([
-    axios.get(`artists/${albumResponse.data.artist.id}/`),
-    axios.get('tracks/', {
-      params: {
-        ordering: 'disc_number,position',
-        album: props.id,
-        page_size: paginateBy.value,
-        page: page.value,
-        include_channels: true
-      }
-    })
-  ])
+  const artistResponse = await axios.get(`artists/${albumResponse.data.artist.id}/`)
 
   artist.value = artistResponse.data
   if (artist.value?.channel) {
@@ -71,20 +58,48 @@ const fetchData = async () => {
 
   object.value = albumResponse.data
   if (object.value) {
-    object.value.tracks = tracksResponse.data.results
-    discs.value = object.value.tracks.reduce((acc: Track[][], track: Track) => {
-      const discNumber = track.disc_number - (object.value?.tracks[0]?.disc_number ?? 1)
-      acc[discNumber] ??= []
-      acc[discNumber].push(track)
-      return acc
-    }, [])
+    object.value.tracks = []
   }
 
+  fetchTracks()
   isLoading.value = false
 }
 
+const tracks = reactive([] as Track[])
+watch(tracks, (tracks) => {
+  if (object.value) {
+    object.value.tracks = tracks
+  }
+})
+
+const isLoadingTracks = ref(false)
+const fetchTracks = async () => {
+  if (isLoadingTracks.value) return
+  isLoadingTracks.value = true
+  tracks.length = 0
+  let url = 'tracks/'
+  try {
+    while (url) {
+      const response = await axios.get(url, {
+        params: {
+          ordering: 'disc_number,position',
+          album: props.id,
+          page_size: paginateBy.value,
+          include_channels: true
+        }
+      })
+
+      url = response.data.next
+      tracks.push(...response.data.results)
+    }
+  } catch (error) {
+    console.error(error)
+  } finally {
+    isLoadingTracks.value = false
+  }
+}
+
 watch(() => props.id, fetchData, { immediate: true })
-watch(page, fetchData)
 
 const router = useRouter()
 const remove = async () => {
@@ -337,15 +352,13 @@ const remove = async () => {
               v-if="object"
               :key="$route.fullPath"
               :paginate-by="paginateBy"
-              :page="page"
               :total-tracks="totalTracks"
               :is-serie="isSerie"
               :artist="artist"
-              :discs="discs"
               :object="object"
+              :is-loading-tracks="isLoadingTracks"
               object-type="album"
               @libraries-loaded="libraries = $event"
-              @page-changed="page = $event"
             />
           </div>
         </div>

front/src/components/library/AlbumDetail.vue

@@ -6,32 +6,59 @@ import ChannelEntries from '~/components/audio/ChannelEntries.vue'
 import TrackTable from '~/components/audio/track/Table.vue'
 import PlayButton from '~/components/audio/PlayButton.vue'
 import Pagination from '~/components/vui/Pagination.vue'
+import { computed, ref } from 'vue'
 
 interface Events {
-  (e: 'page-changed', page: number): void
   (e: 'libraries-loaded', libraries: Library[]): void
 }
 
 interface Props {
   object: Album
 
-  discs: Track[][]
-
+  isLoadingTracks: boolean
   isSerie: boolean
   artist: Artist
-  page: number
   paginateBy: number
   totalTracks: number
 }
 
 const emit = defineEmits<Events>()
-defineProps<Props>()
+const props = defineProps<Props>()
+
+const getDiscKey = (disc: Track[]) => disc?.map(track => track.id).join('|') ?? ''
+const page = ref(1)
+
+const discCount = computed(() => props.object.tracks.reduce((acc, track) => {
+  acc.add(track.disc_number)
+  return acc
+}, new Set()).size)
+
+const discs = computed(() => props.object.tracks
+  .reduce((acc: Track[][], track: Track) => {
+    const discNumber = track.disc_number - (props.object.tracks[0]?.disc_number ?? 1)
+    acc[discNumber].push(track)
+    return acc
+  }, Array(discCount.value).fill(undefined).map(() => []))
+)
+
+const paginatedDiscs = computed(() => props.object.tracks.slice(props.paginateBy * (page.value - 1), props.paginateBy * page.value)
+  .reduce((acc: Track[][], track: Track) => {
+    const discNumber = track.disc_number - (props.object.tracks[0]?.disc_number ?? 1)
+    acc[discNumber].push(track)
+    return acc
+  }, Array(discCount.value).fill(undefined).map(() => []))
+)
 
-const getDiscKey = (disc: Track[]) => disc.map(track => track.id).join('|')
 </script>
 
 <template>
-  <div v-if="object">
+  <div
+    v-if="isLoadingTracks"
+    class="ui vertical segment"
+  >
+    <div :class="['ui', 'centered', 'active', 'inline', 'loader']" />
+  </div>
+  <div v-else-if="object">
     <h2 class="ui header">
       <translate
         v-if="isSerie"
@@ -46,67 +73,69 @@ const getDiscKey = (disc: Track[]) => disc.map(track => track.id).join('|')
         Tracks
       </translate>
     </h2>
+
     <channel-entries
       v-if="artist.channel && isSerie"
       :is-podcast="isSerie"
       :limit="50"
       :filters="{channel: artist.channel.uuid, album: object.id, ordering: '-creation_date'}"
     />
-    <template v-else-if="discs.length > 1">
-      <div
-        v-for="tracks in discs"
-        :key="getDiscKey(tracks)"
-      >
-        <div class="ui hidden divider" />
-        <play-button
-          class="right floated mini inverted vibrant"
-          :tracks="tracks"
-        />
-        <translate
-          tag="h3"
-          :translate-params="{number: tracks[0].disc_number}"
-          translate-context="Content/Album/"
+
+    <template v-else>
+      <template v-if="discCount > 1">
+        <div
+          v-for="tracks, index in paginatedDiscs"
+          :key="index + getDiscKey(tracks)"
         >
-          Volume %{ number }
-        </translate>
+          <template v-if="tracks.length > 0">
+            <div class="ui hidden divider" />
+            <play-button
+              class="right floated mini inverted vibrant"
+              :tracks="discs[index]"
+            />
+            <translate
+              tag="h3"
+              :translate-params="{number: tracks[0]?.disc_number ?? index + 1}"
+              translate-context="Content/Album/"
+            >
+              Volume %{ number }
+            </translate>
+            <track-table
+              :is-album="true"
+              :tracks="tracks"
+              :show-position="true"
+              :show-art="false"
+              :show-album="false"
+              :show-artist="false"
+              :paginate-results="false"
+            />
+          </template>
+        </div>
+      </template>
+      <template v-else>
         <track-table
           :is-album="true"
-          :tracks="tracks"
+          :tracks="object.tracks"
           :show-position="true"
           :show-art="false"
           :show-album="false"
           :show-artist="false"
           :paginate-results="false"
         />
-      </div>
+      </template>
+
       <div
         v-if="totalTracks > paginateBy"
-        class="ui center aligned basic segment tablet-and-below"
+        class="ui center aligned basic segment"
       >
         <pagination
-          :current="page"
+          v-model:current="page"
           :paginate-by="paginateBy"
           :total="totalTracks"
-          :compact="true"
-          @update:current="(page: number) => emit('page-changed', page)"
         />
       </div>
     </template>
-    <template v-else>
-      <track-table
-        :is-album="true"
-        :tracks="object.tracks"
-        :show-position="true"
-        :show-art="false"
-        :show-album="false"
-        :show-artist="false"
-        :paginate-results="true"
-        :total="totalTracks"
-        :paginate-by="paginateBy"
-        :page="page"
-        @page-changed="(page) => emit('page-changed', page)"
-      />
-    </template>
+
     <template v-if="!artist.channel && !isSerie">
       <h2>
         <translate translate-context="Content/*/Title/Noun">