<!-- ldgallery - A static generator which turns a collection of tagged
--             pictures into a searchable web gallery.
--
-- Copyright (C) 2019-2020  Guillaume FOUET
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU Affero General Public License as
-- published by the Free Software Foundation, either version 3 of the
-- License, or (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-- GNU Affero General Public License for more details.
--
-- You should have received a copy of the GNU Affero General Public License
-- along with this program.  If not, see <https://www.gnu.org/licenses/>.
-->

<template>
  <div :class="{'preload': loading}">
    <v-lazy-image
      v-if="item.thumbnail"
      :src="pictureSrc(item.thumbnail.resource)"
      :style="pictureStyle()"
      :title="item.title"
      @intersect="loading=true"
      @load="loading=false"
    />
    <div v-else class="thumbnail-other flex-column flex-center">
      <fa-icon :icon="getIcon()" size="4x" />
      {{item.title | underscore-to-space}}
    </div>
  </div>
</template>

<script lang="ts">
import { Component, Vue, Prop } from "vue-property-decorator";
import Navigation from "@/services/navigation";

@Component
export default class LdThumbnail extends Vue {
  @Prop({ required: true }) readonly item!: Gallery.Item;

  loading: boolean = false;

  pictureSrc(resource: string) {
    return `${process.env.VUE_APP_DATA_URL}${this.$galleryStore.config!.galleryRoot}${resource}`;
  }

  pictureStyle() {
    const resolution = this.item.thumbnail!.resolution;
    return { width: `${resolution.width}px`, height: `${resolution.height}px` };
  }

  getIcon() {
    return Navigation.getIcon(this.item);
  }
}
</script>

<style lang="scss">
@import "@/assets/scss/theme.scss";

.thumbnail-other {
  width: $thumbnail-other-size;
  height: $thumbnail-other-size;
  text-align: center;
  word-break: break-all;
  overflow: hidden;
}

.preload {
  animation: preloadAnimation 1s infinite ease-in-out alternate;
}
@keyframes preloadAnimation {
  from {
    background-color: $content-bgcolor;
  }
  to {
    background-color: $loader-color;
  }
}
</style>
