sb/src/App.vue

<template>

    <header>
    <h1>Story Baobab</h1>
    <div class="intro">
        Drag and drop images and video to sketch a print-friendly storyboard. Double click on shots' title & descriptions to edit!
    </div>
    </header>

    <main>
        
    <div class="insert-scene">
        <input v-model="title" placeholder="Title">
        <button @click="add">Add Scene</button>
    </div>
    <div class="load-scene">
        <label > Open
        <input type="file" multiple @input="load">
        </label>
    </div>


        <SceneEntry 
            v-for="(scene, index) in scenes" 
            :title="scene.title" 
            :series="scene.series"
            @remove="remove(index)" 
            />

    </main>
</template>

<script setup>

import SceneEntry from './components/SceneEntry.vue'
import {utils} from './composables/utils.js'
import {ref, onBeforeMount, onBeforeUnmount } from 'vue'

const {base64ToBlob} = utils()

const scenes = ref([])
const title = ref('')
const add = () => {
    scenes.value.push({
        title: title.value,
        series: []
        })
    title.value = ""
    }

const remove = (index) => {
    scenes.value.splice(index, 1)
}

const load = (e) => {
    let files = e.target.files
    files.forEach((file) =>{
       const reader = new FileReader()
       reader.readAsText(file)
       reader.onloadend = async (ev) => {
        if (ev.target.readyState == FileReader.DONE) {
           try {
            let scene = JSON.parse(reader.result)
            
            await Promise.all(scene.series.map(async (shot) =>{
                let file = await base64ToBlob(shot.img, 'snapshot')
                let filePath = (window.URL || window.webkitURL).createObjectURL(file)
                shot.img = filePath
                shot.file = file
            }))

            scenes.value.push(scene)

           } catch (err) {
            console.log(err)
           }
        }
       }
    })
}

// Prevent accidental navigation
const preventNav = (e) => {
    console.log('Sure to leave?')
    e.preventDefault()
    e.returnValue = ""
}

onBeforeMount(()=>{
    window.addEventListener("beforeunload", preventNav)
})

onBeforeUnmount(()=>{
    window.addEventListener("beforeunload", preventNav)
})


</script>

<style>

header {
    margin: 32px;
}

header h1 {
    margin: 0;
}

main {
    margin: 32px;
}

.insert-scene {
    display: inline-flex;
    gap: 8px;
    padding: 16px;
    background-color: #F3F3F3;
}

.load-scene {
    display: inline-flex;
    gap: 8px;
    padding: 16px;

}

.load-scene input {
    position: absolute;
    top: -10000px;
}

.load-scene label {
    background-color: #fff;
    border: 1px solid currentColor;
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
}

.load-scene label:hover {
    background-color: #393939;
    border-color: #393939;
    color: #fff;
}

@media print {

    header, .insert-scene, .load-scene, .add-shot {
        display: none
    }



}


</style>