#399

backend/app/services/post_import_runner.rb

@@ -17,9 +17,17 @@ class PostImportRunner
   private
 
   def run_row row
-    return row.slice('source_row').merge(status: 'skipped') if row['status'] == 'skipped' || row['existing']
     attributes = row.fetch('attributes', { }).to_h.transform_keys { _1.to_s.underscore }
     raise ArgumentError, '取込項目が不正です．' unless (attributes.keys - ATTRIBUTE_KEYS).empty?
+    raise ArgumentError, '取込項目が大きすぎます．' if attributes.values.any? { _1.to_s.bytesize > PostImportSourceParser::MAX_CELL_BYTES }
+    raise ArgumentError, 'URL が長すぎます．' if row['url'].to_s.bytesize > PostImportSourceParser::MAX_CELL_BYTES
+    preview = PostImportPreviewer.new(parsed: { columns: [], rows: [] }, url_column: 0,
+                                      mappings: {}, existing: 'error').preview_rows(
+                                          rows: [{ source_row: row['source_row'], url: row['url'],
+                                                   attributes:, provenance: row['provenance'] }],
+                                          fetch_metadata: false).first
+    return { source_row: row['source_row'], status: 'failed', errors: preview[:errors] } if preview[:errors].present?
+    return row.slice('source_row').merge(status: 'skipped') if row['status'] == 'skipped' || preview[:existing]
     attributes['url'] = row['url']
     post = PostCreator.new(actor: @actor, attributes:).create!
     { source_row: row['source_row'], status: 'created', post: PostRepr.base(post) }