Keep source plugins in single scraper process

scraper/plugins/registry.js

@@ -2,6 +2,7 @@
 
 // Reviewed first-party modules only. No filesystem scanning or runtime installs.
 const { manifests } = require('./manifest');
+const { validate } = require('./validation');
 const plugins = Object.freeze({
   weebcentral: require('./weebcentral'),
   mangadex: require('./mangadex'),
@@ -11,13 +12,14 @@ function parse(plugin, operation, input) {
   const manifest = manifests[plugin];
   const handler = manifest?.operations.includes(operation) ? plugins[plugin]?.[operation] : null;
   if (typeof handler !== 'function') throw new Error('Unknown source plugin or operation');
-  if (!input || typeof input !== 'object' || typeof input.html !== 'string' || typeof input.url !== 'string') {
+  if (!input || typeof input !== 'object' || typeof input.url !== 'string'
+    || (typeof input.html !== 'string' && !(plugin === 'mangadex' && input.data && typeof input.data === 'object'))) {
     throw new Error('Invalid parser input');
   }
   const url = new URL(input.url);
   if (!['https:', 'http:'].includes(url.protocol)) throw new Error('Invalid source URL');
   if (!manifest.sourceHosts.includes(url.hostname)) throw new Error('Source URL does not belong to plugin');
-  return handler({ html: input.html, url: url.href });
+  return validate(plugin, operation, handler({ html: input.html, data: input.data, url: url.href }));
 }
 
 module.exports = { parse, manifests };