verstak/frontend/src/lib/FilePreviewModal.svelte

<script>
  import { createEventDispatcher, onMount, onDestroy } from 'svelte'
  import FileIcon from './FileIcon.svelte'
  import { formatFileSize, formatMimeType, getFileKind, isImageFile, isTextFile, isPdfFile, isMarkdownFile } from './fileUtils.js'

  export let item
  export let content = '' // base64 data URI or text content
  export let loading = false
  export let error = ''

  const dispatch = createEventDispatcher()

  const kind = getFileKind(item)
  $: showImage = isImageFile(item) && content && content.startsWith('data:')
  $: showText = isTextFile(item) || isMarkdownFile(item)
  $: showPdf = isPdfFile(item)

  function handleKeydown(e) {
    if (e.key === 'Escape') {
      dispatch('close')
    }
  }

  function handleOpenExternal() {
    dispatch('openExternal', item.fileId)
  }

  onMount(() => {
    window.addEventListener('keydown', handleKeydown)
  })

  onDestroy(() => {
    window.removeEventListener('keydown', handleKeydown)
  })
</script>

<div class="overlay" on:click|self={() => dispatch('close')} role="dialog" aria-modal="true" aria-label={`Preview: ${item.name}`}>
  <div class="modal">
    <header class="preview-header">
      <div class="preview-title">
        <FileIcon {kind} size={18}/>
        <span class="preview-name" title={item.name}>{item.name}</span>
      </div>
      <div class="preview-meta">{formatFileSize(item.size)} · {formatMimeType(item.mime)}</div>
      <div class="preview-actions">
        <button class="action-btn" on:click={handleOpenExternal} title="Открыть во внешней программе" aria-label="Открыть внешне">
          <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
            <path d="M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6"/>
            <polyline points="15 3 21 3 21 9"/>
            <line x1="10" y1="14" x2="21" y2="3"/>
          </svg>
        </button>
        <button class="action-btn action-btn-close" on:click={() => dispatch('close')} title="Close" aria-label="Close preview">
          <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round">
            <line x1="18" y1="6" x2="6" y2="18"/>
            <line x1="6" y1="6" x2="18" y2="18"/>
          </svg>
        </button>
      </div>
    </header>
    <div class="preview-body">
      {#if loading}
        <div class="preview-status"><p>Загрузка...</p></div>
      {:else if error}
        <div class="preview-status">
          <p>{error}</p>
          <button class="btn btn-sm" on:click={handleOpenExternal}>Открыть во внешней программе</button>
        </div>
      {:else if showImage && content}
        <div class="preview-image-container">
          <img src={content} alt={item.name} class="preview-image"/>
        </div>
      {:else if showText && content}
        <pre class="preview-text"><code>{content}</code></pre>
      {:else if showPdf}
        {#if content && content.startsWith('data:')}
          <div class="preview-pdf-container">
            <embed src={content} type="application/pdf" class="preview-pdf"/>
          </div>
        {:else}
          <div class="preview-status">
            <p>Предпросмотр PDF недоступен.</p>
            <button class="btn btn-sm" on:click={handleOpenExternal}>Открыть во внешней программе</button>
          </div>
        {/if}
      {:else}
        <div class="preview-status">
          <p>Предпросмотр недоступен для этого типа файлов.</p>
          <button class="btn btn-sm" on:click={handleOpenExternal}>Открыть во внешней программе</button>
        </div>
      {/if}
    </div>
  </div>
</div>

<style>
  .overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
  }

  .modal {
    background: #14141f;
    border: 1px solid #2a2a3c;
    border-radius: 10px;
    width: 90vw;
    max-width: 900px;
    height: 85vh;
    max-height: 700px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }

  .preview-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-bottom: 1px solid #2a2a3c;
    flex-shrink: 0;
  }

  .preview-title {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #ddd;
    font-size: 14px;
    min-width: 0;
  }

  .preview-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .preview-meta {
    font-size: 11px;
    color: #666;
    margin-left: auto;
    white-space: nowrap;
  }

  .preview-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
    margin-left: 8px;
  }

  .action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border: none;
    border-radius: 4px;
    background: transparent;
    color: #666;
    cursor: pointer;
    transition: background 0.12s, color 0.12s;
  }

  .action-btn:hover {
    background: #2a2a3c;
    color: #ccc;
  }

  .action-btn:focus-visible {
    outline: 2px solid #5588ff;
    outline-offset: 1px;
  }

  .action-btn-close {
    color: #ff6b6b;
  }

  .action-btn-close:hover {
    background: #3a2222;
    color: #ff4444;
  }

  .preview-body {
    flex: 1;
    overflow: auto;
    min-height: 0;
  }

  .preview-status {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 48px 24px;
    color: #888;
    font-size: 14px;
  }

  .preview-image-container {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    min-height: 200px;
    background: #0e0e18;
  }

  .preview-image {
    max-width: 100%;
    max-height: calc(85vh - 100px);
    object-fit: contain;
    border-radius: 4px;
  }

  .preview-text {
    margin: 0;
    padding: 16px;
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
    font-size: 12px;
    line-height: 1.5;
    color: #ccc;
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow: auto;
  }

  .preview-pdf-container {
    width: 100%;
    height: 100%;
  }

  .preview-pdf {
    width: 100%;
    height: 100%;
    border: none;
  }

  .btn-sm {
    padding: 6px 14px;
    border: 1px solid #2a2a3c;
    background: #1a1a28;
    color: #ccc;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    font-family: inherit;
    transition: background 0.12s;
  }

  .btn-sm:hover {
    background: #222233;
  }
</style>