Class: SourceMonitor::Scraping::BulkSourceScraper

Inherits:
Object
  • Object
show all
Defined in:
lib/source_monitor/scraping/bulk_source_scraper.rb

Overview

Orchestrates bulk scrape enqueues for a source based on a user-selected scope. Works alongside the single-item enqueuer to ensure we respect per-source limits and provide actionable feedback for the UI.

Defined Under Namespace

Classes: Result

Constant Summary collapse

SELECTIONS = 
%i[current unscraped all].freeze
SELECTION_LABELS = 
{
  current: "current view",
  unscraped: "unscraped items",
  all: "all items"
}.freeze
DEFAULT_PREVIEW_LIMIT = 
10

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(source:, selection:, preview_limit: DEFAULT_PREVIEW_LIMIT, enqueuer: SourceMonitor::Scraping::Enqueuer, config: SourceMonitor.config.scraping) ⇒ BulkSourceScraper

Returns a new instance of BulkSourceScraper.



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# File 'lib/source_monitor/scraping/bulk_source_scraper.rb', line 66

def initialize(source:, selection:, preview_limit: DEFAULT_PREVIEW_LIMIT, enqueuer: SourceMonitor::Scraping::Enqueuer, config: SourceMonitor.config.scraping)
  @source = source
  @selection = self.class.normalize_selection(selection) || :current
  normalized_limit = preview_limit.respond_to?(:to_i) ? preview_limit.to_i : DEFAULT_PREVIEW_LIMIT
  @preview_limit = normalized_limit.positive? ? normalized_limit : DEFAULT_PREVIEW_LIMIT
  @enqueuer = enqueuer
  @config = config
end

Class Method Details

.normalize_selection(selection) ⇒ Object 



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# File 'lib/source_monitor/scraping/bulk_source_scraper.rb', line 60

def self.normalize_selection(selection)
  value = selection.is_a?(String) ? selection.strip : selection
  value = value.to_s.downcase.to_sym if value
  value if SELECTIONS.include?(value)
end

.selection_counts(source:, preview_items:, preview_limit: 10) ⇒ Object 



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# File 'lib/source_monitor/scraping/bulk_source_scraper.rb', line 50

def self.selection_counts(source:, preview_items:, preview_limit: 10)
  preview_collection = Array(preview_items).compact
  base_scope = SourceMonitor::Item.active.where(source_id: source.id)
  {
    current: preview_collection.size.clamp(0, preview_limit.to_i.nonzero? || preview_collection.size),
    unscraped: base_scope.merge(unscraped_scope).count,
    all: base_scope.count
  }
end

.selection_label(selection) ⇒ Object 



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# File 'lib/source_monitor/scraping/bulk_source_scraper.rb', line 46

def self.selection_label(selection)
  SELECTION_LABELS[normalize_selection(selection)] || SELECTION_LABELS[:current]
end

.unscraped_scope ⇒ Object 



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# File 'lib/source_monitor/scraping/bulk_source_scraper.rb', line 156

def self.unscraped_scope
  item_table = SourceMonitor::Item.arel_table
  failed_statuses = %w[failed partial]
  SourceMonitor::Item.active.where(
    item_table[:scraped_at].eq(nil)
      .or(item_table[:scrape_status].in(failed_statuses))
  )
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/source_monitor/scraping/bulk_source_scraper.rb', line 75

def call
  return disabled_result unless source.scraping_enabled?
  return invalid_selection_result unless SELECTIONS.include?(selection)

  items = scoped_items.to_a
  attempted_count = items.size

  return no_items_result if attempted_count.zero?

  failure_details = Hash.new(0)
  messages = []
  enqueued_count = 0
  already_enqueued_count = 0
  rate_limited = false

  items.each do |item|
    enqueue_result = enqueuer.enqueue(item: item, source:, reason: :manual)

    case enqueue_result.status
    when :enqueued
      enqueued_count += 1
    when :already_enqueued
      already_enqueued_count += 1
    when :rate_limited
      failure_details[:rate_limited] += 1
      messages << enqueue_result.message if enqueue_result.message.present?
      rate_limited = true
      break
    else
      key = enqueue_result.status || :unknown
      failure_details[key] += 1
      messages << enqueue_result.message if enqueue_result.message.present?
    end
  end

  failure_count = failure_details.values.sum
  status = determine_status(enqueued_count:, failure_count:, already_enqueued_count:)

  Result.new(
    status:,
    selection:,
    attempted_count: attempted_count,
    enqueued_count:,
    already_enqueued_count:,
    failure_count:,
    failure_details: failure_details.freeze,
    messages: messages.compact.uniq,
    rate_limited: rate_limited
  )
end