eewing
34 lines
1022 B
TypeScript
34 lines
1022 B
TypeScript
/** Allowed MIME types for receipt/item image uploads (server-side check). */
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const ALLOWED_IMAGE_TYPES = new Set([
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"image/jpeg",
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"image/png",
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"image/webp",
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"image/heic",
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"image/heif",
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]);
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/** Max size 10MB. */
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const MAX_IMAGE_BYTES = 10 * 1024 * 1024;
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/**
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* Validates an image file for upload. Returns an error message if invalid, or null if valid/no file.
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* Use in form actions before sending the file to PocketBase.
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*/
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export function validateImageUpload(file: File | null): string | null {
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if (!file || file.size === 0) return null;
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const type = (file.type ?? "").toLowerCase();
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const name = file.name.toLowerCase();
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const isHeic =
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type === "image/heic" ||
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type === "image/heif" ||
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name.endsWith(".heic") ||
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name.endsWith(".heif");
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if (!isHeic && !ALLOWED_IMAGE_TYPES.has(type)) {
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return "Invalid image type. Use JPEG, PNG, WebP, or HEIC.";
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}
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if (file.size > MAX_IMAGE_BYTES) {
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return `Image must be under ${MAX_IMAGE_BYTES / 1024 / 1024}MB.`;
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}
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return null;
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}
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