80 行
3.5 KiB
Ruby
80 行
3.5 KiB
Ruby
class PostImportPreviewer
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FIELDS = %w[title thumbnail_base original_created_from original_created_before duration tags parent_post_ids].freeze
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def initialize parsed:, url_column:, mappings: { }, existing: 'skip'
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@parsed = parsed
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@url_column = url_column.to_i
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@mappings = mappings.to_h.stringify_keys
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@existing = existing == 'error' ? 'error' : 'skip'
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end
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def preview
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urls = { }
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@parsed[:rows].map do |row|
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values = row[:values]
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attributes = FIELDS.to_h { |field| [field, mapped_value(field, values)] }
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url = values[@url_column].to_s.strip
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metadata, warnings = fetch_metadata(url)
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attributes = metadata.merge(attributes) { |_key, automatic, input| input.presence || automatic }
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post = Post.new(url:)
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post.valid?
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normal_url = post.url
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errors = post.errors.to_hash.transform_values(&:dup)
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errors[:url] = ['URL が重複しています．'] if normal_url.present? && urls.key?(normal_url)
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urls[normal_url] = true if normal_url.present?
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if normal_url.present? && Post.exists?(url: normal_url)
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@existing == 'error' ? errors[:url] = ['既存投稿です．'] : warnings << '既存投稿のためスキップします．'
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end
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validate_preview_tags(attributes['tags'], errors)
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validate_parents(attributes['parent_post_ids'], errors)
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{ source_row: row[:source_row], url: normal_url || url, attributes:, warnings:, errors:,
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status: errors.present? ? 'error' : (warnings.present? ? 'warning' : 'ready'),
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existing: normal_url.present? && Post.exists?(url: normal_url) }
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end
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end
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private
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def mapped_value field, values
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mapping = @mappings[field]
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return '' if mapping.blank?
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return mapping['value'].to_s if mapping['kind'] == 'fixed'
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Array(mapping['columns']).filter_map { |index| values[index.to_i].to_s.presence }.join(field == 'tags' ? ' ' : '')
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end
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def fetch_metadata url
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return [{ }, ['URL が空です．']] if url.blank?
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data = PostMetadataFetcher.fetch(url)
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warnings = []
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warnings << 'タイトルを取得できませんでした．' if data[:title].blank?
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warnings << 'サムネールを取得できませんでした．' if data[:thumbnail_base].blank?
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[data.compact, warnings]
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rescue Preview::UrlSafety::UnsafeUrl, Preview::HttpFetcher::FetchFailed, Preview::HttpFetcher::ResponseTooLarge => e
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[{ }, ["メタデータを取得できませんでした: #{ e.message }"]]
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end
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def validate_preview_tags raw, errors
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names = raw.to_s.split
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return if names.empty?
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if names.any? { _1.downcase.start_with?('nico:') }
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errors[:tags] = ['ニコニコ・タグは直接指定できません．']
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return
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end
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canonical = names.map { TagName.canonicalise(_1.sub(/\[.*\]\z/, '')).first }
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if Tag.joins(:tag_name).where(tag_names: { name: canonical }, deprecated_at: nil).count < canonical.uniq.length
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errors[:tags] = ['存在しないタグ又は廃止済みタグがあります．']
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end
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rescue Tag::SectionLiteralParseError
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errors[:tags] = ['タグ区間の記法が不正です．']
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end
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def validate_parents raw, errors
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ids = raw.to_s.split.map { Integer(_1, exception: false) }
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return if ids.compact.empty? && raw.to_s.blank?
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errors[:parent_post_ids] = ['親投稿 Id. が不正です．'] and return if ids.any? { _1.nil? || _1 <= 0 }
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errors[:parent_post_ids] = ['存在しない親投稿 Id. があります．'] if Post.where(id: ids).count != ids.uniq.length
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end
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end
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