mobilizon/js/src/components/PictureUpload.vue

<template>
  <div class="root">
    <figure class="image" v-if="actualImageSrc">
      <img :src="actualImageSrc" />
    </figure>
    <figure class="image is-128x128" v-else>
      <div class="image-placeholder">
        <span class="has-text-centered">{{ textFallback }}</span>
      </div>
    </figure>

    <b-upload @input="onFileChanged" :accept="accept">
      <a class="button is-primary">
        <b-icon icon="upload"></b-icon>
        <span>{{ $t("Click to upload") }}</span>
      </a>
    </b-upload>
  </div>
</template>

<style scoped lang="scss">
.root {
  display: flex;
  align-items: center;
}

figure.image {
  margin-right: 30px;
  max-height: 200px;
  max-width: 200px;
  overflow: hidden;
}

.image-placeholder {
  background-color: grey;
  width: 100%;
  height: 100%;
  border-radius: 100%;
  display: flex;
  justify-content: center;
  align-items: center;

  span {
    flex: 1;
    color: #eee;
  }
}
</style>

<script lang="ts">
import { Component, Model, Prop, Vue, Watch } from "vue-property-decorator";

@Component
export default class PictureUpload extends Vue {
  @Model("change", { type: File }) readonly pictureFile!: File;

  @Prop({ type: String, required: false }) defaultImageSrc!: string;

  @Prop({ type: String, required: false, default: "image/gif,image/png,image/jpeg,image/webp" })
  accept!: string;

  @Prop({
    type: String,
    required: false,
    default() {
      // eslint-disable-next-line @typescript-eslint/ban-ts-comment
      // @ts-ignore
      return this.$t("Avatar");
    },
  })
  textFallback!: string;

  imageSrc: string | null = null;

  mounted(): void {
    this.updatePreview(this.pictureFile);
  }

  @Watch("pictureFile")
  onPictureFileChanged(val: File): void {
    this.updatePreview(val);
  }

  onFileChanged(file: File): void {
    this.$emit("change", file);

    this.updatePreview(file);
  }

  private updatePreview(file?: File) {
    if (file) {
      this.imageSrc = URL.createObjectURL(file);
      return;
    }

    this.imageSrc = null;
  }

  get actualImageSrc(): string | null {
    return this.imageSrc || this.defaultImageSrc;
  }
}
</script>