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path: root/app/src/routes/truncate/+page.svelte
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<script lang="ts">
    import saveFile from '$lib/ts/download';
  import type { TruncateRequest, TruncateResponse } from '$lib/types/truncate-worker';
  import { FileDropzone, ProgressBar } from '@skeletonlabs/skeleton';
  import { onMount } from 'svelte';

  let disableInput = false;
  let files: FileList;
  let form: HTMLFormElement;
  let worker: Worker;
  $: truncateTo = 1;
  let originalName: string;

  function onUpload() {
    disableInput = true;
    originalName = files[0].name;
    worker.postMessage({
      file: files[0],
      size: truncateTo,
    } as TruncateRequest);
    form.reset();
    truncateTo = 1;
  }

  onMount(async () => {
    worker = new Worker(new URL('$lib/ts/truncate.worker.ts', import.meta.url), { type: 'module' });
    worker.onmessage = (e: MessageEvent<TruncateResponse>) => {
      disableInput = false;
      saveFile(e.data.file, `trunc-${originalName}`);

    };
  });
</script>

<svelte:head>
  <title>Truncate</title>
</svelte:head>

<div class="container h-full mx-auto flex justify-center items-center">
  <div class="space-y-10 text-center flex flex-col items-center">
    <form bind:this={form} on:submit|preventDefault={onUpload} method="POST" action="?/TODO">
      <label class="label" for="truncateMe">
        <FileDropzone
          id="truncateMe"
          name="truncateMe"
          bind:files
          on:change={() => form.requestSubmit()}
          required
          disabled={disableInput}
        >
          <svelte:fragment slot="lead">
            <h2 class="h2">Drop a file here to truncate it.</h2>
          </svelte:fragment>
        </FileDropzone>
      </label>
      <br />
      <label class="label">
        <span>Truncate up to... (in bytes)</span>
        <input class="input" type="number" name="truncateTo" bind:value={truncateTo} min="1" required />

      </label>
      <br />
      <noscript>
        <button type="submit" class="btn variant-filled"
          >After adding a file, click to submit! (Not yet implemented)</button
        >
      </noscript>
      {#if disableInput}
        <h3 class="h3">Truncating the file, this may take time!</h3>
        <br />
        <ProgressBar />
      {/if}
    </form>
  </div>
</div>