refactor(mobile): extract shared MIME type utility and improve error handling

- Extract EXT_TO_MIME map and mimeTypeFromFilename to shared module at mobile/src/utils/mimeTypes.ts (used by _layout.tsx and +not-found.tsx) - Add error logging to ensureLocalUri catch block for debugging - Add error handling to Linking.openURL calls in ProfileScreen - Fix incorrect LSSupportsOpeningDocumentsInPlace docs in audit report Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>
2026-03-19 12:05:47 +00:00
parent f549505bfd
commit cfe83d7efa
6 changed files with 59 additions and 81 deletions
@@ -0,0 +1,44 @@
+/**
+ * Shared MIME type utilities for the DocuElevate mobile app.
+ *
+ * Used by the Linking handler in _layout.tsx, the catch-all +not-found.tsx,
+ * and any other code that needs to infer a MIME type from a file extension.
+ */
+
+/**
+ * Common MIME type mappings for file extensions.
+ * Used to infer the MIME type of files shared via the Share Sheet / "Open In…"
+ * so the server receives a correct Content-Type instead of application/octet-stream.
+ */
+export const EXT_TO_MIME: Record<string, string> = {
+  pdf: "application/pdf",
+  jpg: "image/jpeg",
+  jpeg: "image/jpeg",
+  png: "image/png",
+  gif: "image/gif",
+  bmp: "image/bmp",
+  tiff: "image/tiff",
+  tif: "image/tiff",
+  webp: "image/webp",
+  heic: "image/heic",
+  heif: "image/heif",
+  txt: "text/plain",
+  csv: "text/csv",
+  doc: "application/msword",
+  docx: "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
+  xls: "application/vnd.ms-excel",
+  xlsx: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+  ppt: "application/vnd.ms-powerpoint",
+  pptx: "application/vnd.openxmlformats-officedocument.presentationml.presentation",
+  rtf: "application/rtf",
+  html: "text/html",
+  xml: "application/xml",
+  json: "application/json",
+  zip: "application/zip",
+};
+
+/** Infer MIME type from a filename's extension, or undefined if unknown. */
+export function mimeTypeFromFilename(filename: string): string | undefined {
+  const ext = filename.split(".").pop()?.toLowerCase();
+  return ext ? EXT_TO_MIME[ext] : undefined;
+}