fix: prevent conversion on one-way

oops

messages/en.json

@@ -94,6 +94,7 @@
 			"vertd_details_error_message": "<b>Error message:</b> [view_link]View error logs[/view_link]",
 			"vertd_details_close": "Close",
 			"unsupported_format": "Only image, video, audio, and document files are supported",
+			"format_output_only": "This format can currently only be used as output (converted to), not as input.",
 			"vertd_not_found": "Could not find the vertd instance to start video conversion. Are you sure the instance URL is set correctly?",
 			"worker_downloading": "The {type} converter is currently being initialized, please wait a few moments.",
 			"worker_error": "The {type} converter had an error during initialization, please try again later.",

src/routes/convert/+page.svelte

@@ -216,6 +216,21 @@
 					</p>
 				</div>
 			{/if}
+		{:else}
+			{@const formatInfo = currentConverter.supportedFormats.find(
+				(f) => f.name === file.from,
+			)}
+			{#if formatInfo && !formatInfo.fromSupported}
+				<div
+					class="h-full flex flex-col text-center justify-center text-failure"
+				>
+					<p class="font-body font-bold">
+						{m["convert.errors.cant_convert"]()}
+					</p>
+					<p class="font-normal">
+						{m["convert.errors.format_output_only"]()}
+					</p>
+				</div>
 			{:else if currentConverter.status === "downloading"}
 				<div
 					class="h-full flex flex-col text-center justify-center text-failure"
@@ -330,9 +345,12 @@
 								{categories}
 								from={file.from}
 								bind:selected={file.to}
-							onselect={(option) => handleSelect(option, file)}
+								onselect={(option) =>
+									handleSelect(option, file)}
 							/>
-						<div class="w-full flex items-center justify-between">
+							<div
+								class="w-full flex items-center justify-between"
+							>
 								<Tooltip
 									text={m["convert.tooltips.convert_file"]()}
 									position="bottom"
@@ -372,6 +390,7 @@
 					</div>
 				</div>
 			{/if}
+		{/if}
 	</Panel>
 {/snippet}