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Add Files tab to capsule detail page with file browser and preview

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Implements a split-panel file browser: directory tree on the left with
path input and breadcrumb navigation, file preview on the right with
line numbers. Binary/large files (>10MB) show a download prompt instead.

Also adds CopyButton component across capsule, snapshot, and template
pages, and fixes pre-existing type errors in StatsPanel and admin
templates page.
This commit is contained in:
Rafeed M. Bhuiyan
2026-04-10 18:43:11 +06:00
parent c9283cac70
commit 82531b735c
9 changed files with 861 additions and 32 deletions
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frontend/src/lib/components/FilesTab.svelte Normal file
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<script lang="ts">
import {
listDir,
readFile,
downloadFile,
isBinaryFile,
isFileTooLarge,
formatFileSize,
type FileEntry,
} from '$lib/api/files';
type Props = {
sandboxId: string;
isRunning: boolean;
};
let { sandboxId, isRunning }: Props = $props();
// Directory navigation state
let currentPath = $state('/');
let entries = $state<FileEntry[]>([]);
let dirLoading = $state(false);
let dirError = $state<string | null>(null);
// File preview state
let selectedFile = $state<FileEntry | null>(null);
let fileContent = $state<string | null>(null);
let fileLoading = $state(false);
let fileError = $state<string | null>(null);
// Path input
let pathInput = $state('/');
let pathInputFocused = $state(false);
// Sorted entries: directories first, then files, alphabetical within each group
const sortedEntries = $derived(
[...entries].sort((a, b) => {
if (a.type === 'directory' && b.type !== 'directory') return -1;
if (a.type !== 'directory' && b.type === 'directory') return 1;
return a.name.localeCompare(b.name);
})
);
// Breadcrumb segments from currentPath
const breadcrumbs = $derived(() => {
const parts = currentPath.split('/').filter(Boolean);
const crumbs: { name: string; path: string }[] = [{ name: '/', path: '/' }];
for (let i = 0; i < parts.length; i++) {
crumbs.push({ name: parts[i], path: '/' + parts.slice(0, i + 1).join('/') });
}
return crumbs;
});
async function navigateTo(path: string) {
currentPath = normalizePath(path);
pathInput = currentPath;
selectedFile = null;
fileContent = null;
fileError = null;
await loadDir();
}
function normalizePath(p: string): string {
if (!p.startsWith('/')) {
// Relative path — resolve against current directory
p = currentPath.replace(/\/$/, '') + '/' + p;
}
// Collapse .. and .
const parts = p.split('/').filter(Boolean);
const resolved: string[] = [];
for (const part of parts) {
if (part === '..') resolved.pop();
else if (part !== '.') resolved.push(part);
}
return '/' + resolved.join('/');
}
async function loadDir() {
if (!isRunning) return;
dirLoading = true;
dirError = null;
const result = await listDir(sandboxId, currentPath);
if (result.ok) {
entries = result.data.entries ?? [];
} else {
dirError = result.error;
entries = [];
}
dirLoading = false;
}
async function selectFile(entry: FileEntry) {
if (entry.type === 'directory') {
await navigateTo(entry.path);
return;
}
selectedFile = entry;
fileContent = null;
fileError = null;
// Check if we should preview or prompt download
if (isBinaryFile(entry.name) || isFileTooLarge(entry.size)) {
// Don't load content — the preview pane will show download prompt
return;
}
fileLoading = true;
const result = await readFile(sandboxId, entry.path);
if (result.ok) {
// Check if content appears to be binary (contains null bytes or mostly non-printable)
if (looksLikeBinary(result.data)) {
fileContent = null;
// Will show download prompt
} else {
fileContent = result.data;
}
} else {
fileError = result.error;
}
fileLoading = false;
}
function looksLikeBinary(text: string): boolean {
// Sample first 8KB for null bytes or high ratio of non-printable chars
const sample = text.slice(0, 8192);
let nonPrintable = 0;
for (let i = 0; i < sample.length; i++) {
const code = sample.charCodeAt(i);
if (code === 0) return true;
if (code < 32 && code !== 9 && code !== 10 && code !== 13) nonPrintable++;
}
return sample.length > 0 && nonPrintable / sample.length > 0.1;
}
async function handleDownload() {
if (!selectedFile) return;
try {
await downloadFile(sandboxId, selectedFile.path, selectedFile.name);
} catch {
fileError = 'Download failed';
}
}
function handlePathSubmit(e: SubmitEvent) {
e.preventDefault();
const target = pathInput.trim();
if (!target) return;
// If ends with / or has no extension, treat as directory navigation
// Otherwise, attempt to open as a file
const resolved = normalizePath(target);
// Try to navigate — if it fails we'll show an error
navigateOrOpenFile(resolved);
}
async function navigateOrOpenFile(path: string) {
// First try as directory
const dirResult = await listDir(sandboxId, path);
if (dirResult.ok) {
currentPath = path;
pathInput = path;
entries = dirResult.data.entries ?? [];
selectedFile = null;
fileContent = null;
fileError = null;
return;
}
// If directory listing failed, try reading as a file
// We need the parent dir to get the file entry info
const lastSlash = path.lastIndexOf('/');
const parentPath = lastSlash <= 0 ? '/' : path.slice(0, lastSlash);
const fileName = path.slice(lastSlash + 1);
// Navigate to parent directory
currentPath = parentPath;
pathInput = parentPath;
const parentResult = await listDir(sandboxId, parentPath);
if (parentResult.ok) {
entries = parentResult.data.entries ?? [];
// Find the file in parent listing
const found = entries.find((e) => e.name === fileName);
if (found && found.type !== 'directory') {
await selectFile(found);
} else {
// Not found in parent either — show error
dirError = `Not found: ${path}`;
}
} else {
dirError = parentResult.error;
entries = [];
}
}
function handleKeydown(e: KeyboardEvent) {
if (e.key === 'Escape') {
(e.target as HTMLInputElement)?.blur();
}
}
function fileIcon(entry: FileEntry): string {
if (entry.type === 'directory') return 'dir';
if (entry.type === 'symlink') return 'link';
return 'file';
}
function fmtModified(ts: number): string {
if (!ts) return '—';
return new Date(ts * 1000).toLocaleString([], {
month: 'short',
day: 'numeric',
hour: '2-digit',
minute: '2-digit',
});
}
// Load initial directory on mount
$effect(() => {
if (isRunning) {
loadDir();
}
});
</script>
<style>
.file-row {
transition: background-color 0.1s ease;
}
.file-row:hover {
background-color: var(--color-bg-3);
}
.file-row.active {
background-color: rgba(94, 140, 88, 0.08);
}
.preview-code {
tab-size: 4;
-moz-tab-size: 4;
}
/* Thin scrollbar for file tree and preview */
.thin-scroll::-webkit-scrollbar { width: 6px; height: 6px; }
.thin-scroll::-webkit-scrollbar-track { background: transparent; }
.thin-scroll::-webkit-scrollbar-thumb {
background: var(--color-bg-5);
border-radius: 3px;
}
.thin-scroll::-webkit-scrollbar-thumb:hover {
background: var(--color-text-muted);
}
@keyframes fadeIn {
from { opacity: 0; }
to { opacity: 1; }
}
.fade-in {
animation: fadeIn 0.2s ease both;
}
</style>
{#if !isRunning}
<div class="flex items-center gap-3 rounded-[var(--radius-card)] border border-[var(--color-border-mid)] bg-[var(--color-bg-2)] px-5 py-4 m-8">
<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="var(--color-text-muted)" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
<path d="M22 19a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h5l2 3h9a2 2 0 0 1 2 2z" />
</svg>
<span class="text-ui text-[var(--color-text-tertiary)]">
File browser is only available for running capsules.
</span>
</div>
{:else}
<div class="flex flex-1 min-h-0">
<!-- Left panel: File tree -->
<div class="flex w-[380px] shrink-0 flex-col border-r border-[var(--color-border)]">
<!-- Path input -->
<form onsubmit={handlePathSubmit} class="border-b border-[var(--color-border)] px-4 py-3">
<div class="flex items-center gap-2 rounded-[var(--radius-input)] border px-3 py-1.5 transition-colors duration-150
{pathInputFocused
? 'border-[var(--color-accent)]/50 bg-[var(--color-bg-1)]'
: 'border-[var(--color-border)] bg-[var(--color-bg-2)]'}">
<svg class="shrink-0 text-[var(--color-text-muted)]" width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<polyline points="16 3 21 3 21 8" />
<line x1="4" y1="20" x2="21" y2="3" />
<polyline points="21 16 21 21 16 21" />
<line x1="15" y1="15" x2="21" y2="21" />
<line x1="4" y1="4" x2="9" y2="9" />
</svg>
<input
type="text"
bind:value={pathInput}
onfocus={() => (pathInputFocused = true)}
onblur={() => (pathInputFocused = false)}
onkeydown={handleKeydown}
placeholder="/path/to/file"
spellcheck="false"
autocomplete="off"
class="flex-1 bg-transparent font-mono text-meta text-[var(--color-text-primary)] outline-none placeholder:text-[var(--color-text-muted)]"
/>
<button
type="submit"
class="shrink-0 rounded-[3px] px-1.5 py-0.5 text-badge font-semibold uppercase tracking-[0.05em] text-[var(--color-text-muted)] transition-colors hover:bg-[var(--color-bg-4)] hover:text-[var(--color-text-secondary)]"
>
Go
</button>
</div>
</form>
<!-- Breadcrumbs -->
<div class="flex items-center gap-1 border-b border-[var(--color-border)] px-4 py-2 overflow-x-auto">
{#each breadcrumbs() as crumb, i}
{#if i > 0}
<svg class="shrink-0 text-[var(--color-text-muted)]" width="10" height="10" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round">
<polyline points="9 18 15 12 9 6" />
</svg>
{/if}
<button
onclick={() => navigateTo(crumb.path)}
class="shrink-0 rounded-[3px] px-1.5 py-0.5 font-mono text-label text-[var(--color-text-secondary)] transition-colors hover:bg-[var(--color-bg-4)] hover:text-[var(--color-text-primary)]
{i === breadcrumbs().length - 1 ? 'text-[var(--color-text-primary)]' : ''}"
>
{crumb.name}
</button>
{/each}
</div>
<!-- File list -->
<div class="thin-scroll flex-1 overflow-y-auto">
{#if dirLoading}
<div class="flex items-center justify-center py-12">
<div class="flex items-center gap-2 text-meta text-[var(--color-text-secondary)]">
<svg class="animate-spin" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
<path d="M21 12a9 9 0 1 1-6.219-8.56" />
</svg>
Loading...
</div>
</div>
{:else if dirError}
<div class="px-4 py-4">
<div class="flex items-start gap-2.5 rounded-[var(--radius-card)] border border-[var(--color-red)]/25 bg-[var(--color-red)]/6 px-3.5 py-3">
<svg class="mt-0.5 shrink-0 text-[var(--color-red)]" width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<circle cx="12" cy="12" r="10" /><line x1="12" y1="8" x2="12" y2="12" /><line x1="12" y1="16" x2="12.01" y2="16" />
</svg>
<span class="text-meta text-[var(--color-red)]">{dirError}</span>
</div>
</div>
{:else if entries.length === 0}
<div class="flex flex-col items-center justify-center py-12 gap-2">
<svg class="text-[var(--color-text-muted)]" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round">
<path d="M22 19a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h5l2 3h9a2 2 0 0 1 2 2z" />
</svg>
<span class="text-meta text-[var(--color-text-muted)]">Empty directory</span>
</div>
{:else}
<!-- Parent directory -->
{#if currentPath !== '/'}
<button
onclick={() => navigateTo(currentPath + '/..')}
class="file-row flex w-full items-center gap-3 px-4 py-2 text-left"
>
<svg class="shrink-0 text-[var(--color-text-muted)]" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<polyline points="15 18 9 12 15 6" />
</svg>
<span class="font-mono text-meta text-[var(--color-text-secondary)]">..</span>
</button>
{/if}
{#each sortedEntries as entry (entry.path)}
<button
onclick={() => selectFile(entry)}
class="file-row flex w-full items-center gap-3 px-4 py-[7px] text-left
{selectedFile?.path === entry.path ? 'active' : ''}"
>
<!-- Icon -->
{#if fileIcon(entry) === 'dir'}
<svg class="shrink-0 text-[var(--color-accent-mid)]" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<path d="M22 19a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h5l2 3h9a2 2 0 0 1 2 2z" />
</svg>
{:else if fileIcon(entry) === 'link'}
<svg class="shrink-0 text-[var(--color-blue)]" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71" />
<path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71" />
</svg>
{:else}
<svg class="shrink-0 text-[var(--color-text-muted)]" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z" />
<polyline points="14 2 14 8 20 8" />
</svg>
{/if}
<!-- Name + metadata -->
<div class="flex flex-1 items-center gap-2 overflow-hidden">
<span class="truncate font-mono text-meta
{entry.type === 'directory'
? 'text-[var(--color-text-primary)]'
: 'text-[var(--color-text-secondary)]'}">
{entry.name}
</span>
{#if entry.type === 'symlink' && entry.symlink_target}
<span class="truncate font-mono text-badge text-[var(--color-text-muted)]">
&rarr; {entry.symlink_target}
</span>
{/if}
</div>
<!-- Size (files only) -->
{#if entry.type === 'file'}
<span class="shrink-0 font-mono text-badge text-[var(--color-text-muted)]">
{formatFileSize(entry.size)}
</span>
{/if}
<!-- Permissions -->
<span class="hidden shrink-0 font-mono text-badge text-[var(--color-text-muted)] xl:inline">
{entry.permissions}
</span>
</button>
{/each}
{/if}
</div>
<!-- Footer: entry count -->
{#if !dirLoading && !dirError}
<div class="border-t border-[var(--color-border)] px-4 py-2">
<span class="font-mono text-badge text-[var(--color-text-muted)]">
{entries.length} item{entries.length !== 1 ? 's' : ''}
</span>
</div>
{/if}
</div>
<!-- Right panel: File preview -->
<div class="flex flex-1 flex-col min-w-0 bg-[var(--color-bg-1)]">
{#if !selectedFile}
<!-- Empty state -->
<div class="flex flex-1 items-center justify-center">
<div class="flex flex-col items-center gap-3 text-center">
<svg class="text-[var(--color-text-muted)]" width="32" height="32" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.2" stroke-linecap="round" stroke-linejoin="round" style="opacity: 0.5">
<path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z" />
<polyline points="14 2 14 8 20 8" />
</svg>
<span class="text-meta text-[var(--color-text-muted)]">Select a file to preview</span>
</div>
</div>
{:else}
<!-- File header -->
<div class="flex items-center justify-between border-b border-[var(--color-border)] px-5 py-3">
<div class="flex items-center gap-2.5 overflow-hidden">
<svg class="shrink-0 text-[var(--color-text-muted)]" width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z" />
<polyline points="14 2 14 8 20 8" />
</svg>
<span class="truncate font-mono text-meta text-[var(--color-text-primary)]">{selectedFile.path}</span>
</div>
<div class="flex items-center gap-3 shrink-0 ml-3">
<span class="font-mono text-badge text-[var(--color-text-muted)]">{formatFileSize(selectedFile.size)}</span>
<button
onclick={handleDownload}
class="flex items-center gap-1.5 rounded-[var(--radius-button)] border border-[var(--color-border)] bg-[var(--color-bg-3)] px-2.5 py-1 text-badge font-semibold uppercase tracking-[0.05em] text-[var(--color-text-secondary)] transition-colors hover:bg-[var(--color-bg-4)] hover:text-[var(--color-text-primary)]"
>
<svg width="11" height="11" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round">
<path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4" />
<polyline points="7 10 12 15 17 10" />
<line x1="12" y1="15" x2="12" y2="3" />
</svg>
Download
</button>
</div>
</div>
<!-- File content -->
<div class="thin-scroll flex-1 overflow-auto">
{#if fileLoading}
<div class="flex items-center justify-center py-16">
<div class="flex items-center gap-2 text-meta text-[var(--color-text-secondary)]">
<svg class="animate-spin" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
<path d="M21 12a9 9 0 1 1-6.219-8.56" />
</svg>
Reading file...
</div>
</div>
{:else if fileError}
<div class="px-5 py-5">
<div class="flex items-start gap-2.5 rounded-[var(--radius-card)] border border-[var(--color-red)]/25 bg-[var(--color-red)]/6 px-3.5 py-3">
<svg class="mt-0.5 shrink-0 text-[var(--color-red)]" width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<circle cx="12" cy="12" r="10" /><line x1="12" y1="8" x2="12" y2="12" /><line x1="12" y1="16" x2="12.01" y2="16" />
</svg>
<span class="text-meta text-[var(--color-red)]">{fileError}</span>
</div>
</div>
{:else if isBinaryFile(selectedFile.name) || isFileTooLarge(selectedFile.size) || (selectedFile && fileContent === null && !fileLoading)}
<!-- Binary / too large / unreadable — download prompt -->
<div class="flex flex-1 items-center justify-center py-16">
<div class="fade-in flex flex-col items-center gap-4 text-center">
<div class="flex h-12 w-12 items-center justify-center rounded-[var(--radius-card)] border border-[var(--color-border-mid)] bg-[var(--color-bg-3)]">
{#if isFileTooLarge(selectedFile.size)}
<svg class="text-[var(--color-amber)]" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round">
<path d="M10.29 3.86L1.82 18a2 2 0 0 0 1.71 3h16.94a2 2 0 0 0 1.71-3L13.71 3.86a2 2 0 0 0-3.42 0z" />
<line x1="12" y1="9" x2="12" y2="13" />
<line x1="12" y1="17" x2="12.01" y2="17" />
</svg>
{:else}
<svg class="text-[var(--color-text-muted)]" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round">
<rect x="3" y="3" width="18" height="18" rx="2" ry="2" />
<line x1="9" y1="3" x2="9" y2="21" />
</svg>
{/if}
</div>
<div class="flex flex-col gap-1.5">
{#if isFileTooLarge(selectedFile.size)}
<span class="text-ui font-medium text-[var(--color-text-primary)]">File too large to preview</span>
<span class="text-meta text-[var(--color-text-tertiary)]">
{formatFileSize(selectedFile.size)} exceeds the 10 MB preview limit
</span>
{:else}
<span class="text-ui font-medium text-[var(--color-text-primary)]">Binary file</span>
<span class="text-meta text-[var(--color-text-tertiary)]">
This file cannot be displayed as text
</span>
{/if}
</div>
<button
onclick={handleDownload}
class="mt-1 flex items-center gap-2 rounded-[var(--radius-button)] border border-[var(--color-accent)]/30 bg-[var(--color-accent-glow-mid)] px-4 py-2 text-meta font-semibold text-[var(--color-accent-bright)] transition-colors hover:border-[var(--color-accent)]/50 hover:bg-[var(--color-accent-glow-mid)]"
>
<svg width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4" />
<polyline points="7 10 12 15 17 10" />
<line x1="12" y1="15" x2="12" y2="3" />
</svg>
Download file
</button>
</div>
</div>
{:else if fileContent !== null}
<!-- Text preview with line numbers -->
<div class="fade-in">
<pre class="preview-code p-0 m-0"><code class="block">{#each fileContent.split('\n') as line, i}<div class="flex hover:bg-[var(--color-bg-2)]"><span class="sticky left-0 inline-block w-[52px] shrink-0 select-none border-r border-[var(--color-border)] bg-[var(--color-bg-1)] px-3 py-0 text-right font-mono text-badge leading-[1.65rem] text-[var(--color-text-muted)]">{i + 1}</span><span class="flex-1 whitespace-pre-wrap break-all px-4 py-0 font-mono text-meta leading-[1.65rem] text-[var(--color-text-secondary)]">{line}</span></div>{/each}</code></pre>
</div>
{/if}
</div>
{/if}
</div>
</div>
{/if}