app: file type filter on desktop + multiple files (#18403)

packages/app/src/constants/file-picker.ts

@@ -0,0 +1,89 @@
+export const ACCEPTED_IMAGE_TYPES = ["image/png", "image/jpeg", "image/gif", "image/webp"]
+
+export const ACCEPTED_FILE_TYPES = [
+  ...ACCEPTED_IMAGE_TYPES,
+  "application/pdf",
+  "text/*",
+  "application/json",
+  "application/ld+json",
+  "application/toml",
+  "application/x-toml",
+  "application/x-yaml",
+  "application/xml",
+  "application/yaml",
+  ".c",
+  ".cc",
+  ".cjs",
+  ".conf",
+  ".cpp",
+  ".css",
+  ".csv",
+  ".cts",
+  ".env",
+  ".go",
+  ".gql",
+  ".graphql",
+  ".h",
+  ".hh",
+  ".hpp",
+  ".htm",
+  ".html",
+  ".ini",
+  ".java",
+  ".js",
+  ".json",
+  ".jsx",
+  ".log",
+  ".md",
+  ".mdx",
+  ".mjs",
+  ".mts",
+  ".py",
+  ".rb",
+  ".rs",
+  ".sass",
+  ".scss",
+  ".sh",
+  ".sql",
+  ".toml",
+  ".ts",
+  ".tsx",
+  ".txt",
+  ".xml",
+  ".yaml",
+  ".yml",
+  ".zsh",
+]
+
+const MIME_EXT = new Map([
+  ["image/png", "png"],
+  ["image/jpeg", "jpg"],
+  ["image/gif", "gif"],
+  ["image/webp", "webp"],
+  ["application/pdf", "pdf"],
+  ["application/json", "json"],
+  ["application/ld+json", "jsonld"],
+  ["application/toml", "toml"],
+  ["application/x-toml", "toml"],
+  ["application/x-yaml", "yaml"],
+  ["application/xml", "xml"],
+  ["application/yaml", "yaml"],
+])
+
+const TEXT_EXT = ["txt", "text", "md", "markdown", "log", "csv"]
+
+export const ACCEPTED_FILE_EXTENSIONS = Array.from(
+  new Set(
+    ACCEPTED_FILE_TYPES.flatMap((item) => {
+      if (item.startsWith(".")) return [item.slice(1)]
+      if (item === "text/*") return TEXT_EXT
+      const out = MIME_EXT.get(item)
+      return out ? [out] : []
+    }),
+  ),
+).sort()
+
+export function filePickerFilters(ext?: string[]) {
+  if (!ext || ext.length === 0) return undefined
+  return [{ name: "Files", extensions: ext }]
+}