Class: Image::ImageShiftingService

Inherits:
Object
  • Object
show all
Defined in:
app/services/image/image_shifting_service.rb

Overview

Service class for handling image shifting operations

Class Method Summary collapse

Class Method Details

.analyze_missing_sequences(locale: 'en', prefix: nil) ⇒ Hash

Analyzes missing sequences in image profiles

Parameters:

  • locale (String) (defaults to: 'en') —

    The locale for the images (default: 'en')

  • prefix (String, nil) (defaults to: nil) —

    Optional prefix to limit analysis to a specific group (e.g., 'AMZ', 'WAL')

Returns:

  • (Hash) —

    Analysis results including items with gaps and gap details



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# File 'app/services/image/image_shifting_service.rb', line 104

def self.analyze_missing_sequences(locale: 'en', prefix: nil)
  results = {
    total_items: 0,
    items_with_gaps: 0,
    total_gaps: 0,
    items_with_complete_sequences: 0,
    gap_details: [],
    prefix_groups: {}
  }

  # Find all items that have image profiles
  items_with_profiles = Item.joins(:image_profiles)
                            .where(image_profiles: { locale: locale })
                            .distinct

  # Apply prefix filter if specified
  if prefix.present?
    prefix = prefix.upcase
    items_with_profiles = items_with_profiles.where('image_profiles.image_type LIKE ?', "#{prefix}%")
  end

  results[:total_items] = items_with_profiles.count

  # Group by prefix for analysis
  prefix_groups = {}

  if prefix.present?
    prefix_groups[prefix] = items_with_profiles
  else
    # Group by prefix
    %w[AMZ WAL].each do |group_prefix|
      group_items = items_with_profiles.where('image_profiles.image_type LIKE ?', "#{group_prefix}%")
      prefix_groups[group_prefix] = group_items if group_items.any?
    end
  end

  prefix_groups.each do |group_prefix, items|
    group_results = analyze_prefix_group(items, group_prefix, locale)
    results[:prefix_groups][group_prefix] = group_results
    results[:items_with_gaps] += group_results[:items_with_gaps]
    results[:total_gaps] += group_results[:total_gaps]
    results[:gap_details].concat(group_results[:gap_details])
  end

  results[:items_with_complete_sequences] = results[:total_items] - results[:items_with_gaps]
  results
end

.analyze_prefix_group(items, group_prefix, locale) ⇒ Object

Analyzes a specific prefix group for gaps



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# File 'app/services/image/image_shifting_service.rb', line 218

def self.analyze_prefix_group(items, group_prefix, locale)
  results = {
    prefix: group_prefix,
    items_with_gaps: 0,
    total_gaps: 0,
    gap_details: []
  }

  # Get ordered types for this group
  ordered_types = ImageProfile.ordered_image_types_for_group(group_prefix)

  items.find_each do |item|
    current_profiles = get_item_image_profiles(item, locale, group_prefix)

    # Calculate gaps
    gaps = calculate_gaps(current_profiles, ordered_types)

    if gaps.any?
      results[:items_with_gaps] += 1
      results[:total_gaps] += gaps.count

      results[:gap_details] << {
        item: item,
        current_profiles: current_profiles,
        gaps: gaps,
        gap_count: gaps.count
      }
    end
  end

  results
end

.calculate_gaps(current_profiles, ordered_types) ⇒ Object

Calculates gaps in image sequence



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# File 'app/services/image/image_shifting_service.rb', line 252

def self.calculate_gaps(current_profiles, ordered_types)
  gaps = []
  found_types = []

  ordered_types.each do |type|
    if current_profiles.include?(type)
      found_types << type
    elsif found_types.any?
      # This is a gap - a missing type that comes after at least one existing type
      # but only if there are more existing types after this position
      remaining_types = ordered_types[ordered_types.index(type)..-1]
      remaining_found = remaining_types & current_profiles

      gaps << type if remaining_found.any?
    end
  end

  gaps
end

.find_missing_image_type(image_type, locale: 'en', prefix: nil, limit: 50) ⇒ Hash

Finds items missing a specific image type

Parameters:

  • image_type (String) —

    The image type to search for

  • locale (String) (defaults to: 'en') —

    The locale for the images (default: 'en')

  • prefix (String, nil) (defaults to: nil) —

    Optional prefix to limit search to a specific group (e.g., 'AMZ', 'WAL')

  • limit (Integer) (defaults to: 50) —

    Maximum number of items to return (default: 50)

Returns:

  • (Hash) —

    Results including missing items and their current images



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# File 'app/services/image/image_shifting_service.rb', line 158

def self.find_missing_image_type(image_type, locale: 'en', prefix: nil, limit: 50)
  results = {
    image_type: image_type,
    total_missing: 0,
    missing_items: [],
    limit: limit
  }

  # Find items that have image profiles but are missing the specific type
  items_with_profiles = Item.joins(:image_profiles)
                            .where(image_profiles: { locale: locale })
                            .distinct

  # Apply prefix filter if specified
  if prefix.present?
    prefix = prefix.upcase
    items_with_profiles = items_with_profiles.where('image_profiles.image_type LIKE ?', "#{prefix}%")
  end

  # Find items missing the specific image type
  items_missing_type = items_with_profiles.where.not(
    id: ImageProfile.where(locale: locale, image_type: image_type).select(:item_id)
  )

  results[:total_missing] = items_missing_type.count

  # Get details for limited number of items
  items_missing_type.limit(limit).each do |item|
    current_images = get_item_image_profiles(item, locale, prefix)

    results[:missing_items] << {
      item: item,
      current_images: current_images
    }
  end

  results
end

.get_item_image_profiles(item, locale, prefix) ⇒ Object

Gets image profiles for an item in proper order



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# File 'app/services/image/image_shifting_service.rb', line 200

def self.get_item_image_profiles(item, locale, prefix)
  profiles = item.image_profiles.where(locale: locale)
  profiles = profiles.where('image_type LIKE ?', "#{prefix}%") if prefix.present?
  profile_types = profiles.pluck(:image_type)

  # Sort by proper image type order
  ordered_types = prefix.present? ? ImageProfile.ordered_image_types_for_group(prefix) : ImageProfile::IMAGE_TYPES.keys.map(&:to_s)
  profile_types.sort_by { |type| ordered_types.index(type) || 999 }
end

.shift_images_for_all_items(locale: 'en', prefix: nil, batch_size: 100, dry_run: false) ⇒ Hash

Shifts images for all items that have image profiles

Parameters:

  • locale (String) (defaults to: 'en') —

    The locale for the images (default: 'en')

  • prefix (String, nil) (defaults to: nil) —

    Optional prefix to limit shifting to a specific group (e.g., 'AMZ', 'WAL')

  • batch_size (Integer) (defaults to: 100) —

    Number of items to process in each batch (default: 100)

  • dry_run (Boolean) (defaults to: false) —

    If true, only shows what would be done without making changes (default: false)

Returns:

  • (Hash) —

    Summary of the operation including processed items and any errors



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# File 'app/services/image/image_shifting_service.rb', line 42

def self.shift_images_for_all_items(locale: 'en', prefix: nil, batch_size: 100, dry_run: false)
  results = {
    processed_items: 0,
    skipped_items: 0,
    errors: [],
    dry_run: dry_run,
    items_with_changes: 0,
    total_changes: 0
  }

  # Find all items that have image profiles
  items_with_profiles = Item.joins(:image_profiles)
                            .where(image_profiles: { locale: locale })
                            .distinct

  # Apply prefix filter if specified
  if prefix.present?
    prefix = prefix.upcase
    items_with_profiles = items_with_profiles.where('image_profiles.image_type LIKE ?', "#{prefix}%")
  end

  total_items = items_with_profiles.count
  results[:total_items] = total_items

  items_with_profiles.find_in_batches(batch_size: batch_size) do |batch|
    batch.each do |item|
      # Get before state
      before_profiles = get_item_image_profiles(item, locale, prefix)

      if dry_run
        # For dry run, just check if changes would be needed
        after_profiles = simulate_shift(before_profiles, prefix)
        changes_needed = before_profiles != after_profiles
        results[:items_with_changes] += 1 if changes_needed
      else
        # Perform the actual shift
        shift_result = shift_images_for_item(item.id, locale: locale, prefix: prefix)

        if shift_result[:success]
          if shift_result[:changes_made]
            results[:items_with_changes] += 1
            results[:total_changes] += 1
          end
        else
          results[:errors] << shift_result[:errors].first
        end
      end

      results[:processed_items] += 1
    rescue StandardError => e
      error_msg = "Error processing item #{item.id} (#{item.sku}): #{e.message}"
      results[:errors] << error_msg
    end
  end

  results
end

.shift_images_for_item(item_id, locale: 'en', prefix: nil) ⇒ Hash

Shifts images for a specific item to fill empty slots in image type order

Parameters:

  • item_id (Integer) —

    The ID of the item to shift images for

  • locale (String) (defaults to: 'en') —

    The locale for the images (default: 'en')

  • prefix (String, nil) (defaults to: nil) —

    Optional prefix to limit shifting to a specific group (e.g., 'AMZ', 'WAL')

Returns:

  • (Hash) —

    Result of the operation including success status and any errors



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# File 'app/services/image/image_shifting_service.rb', line 8

def self.shift_images_for_item(item_id, locale: 'en', prefix: nil)
  result = { success: true, errors: [], changes_made: false }

  begin
    item = Item.find(item_id)

    # Get before state
    before_profiles = get_item_image_profiles(item, locale, prefix)

    # Perform the shift
    ImageProfile.shift_images_for_item(item_id, locale: locale, prefix: prefix)

    # Get after state
    after_profiles = get_item_image_profiles(item, locale, prefix)

    # Check if changes were made
    result[:changes_made] = before_profiles != after_profiles
    result[:before_profiles] = before_profiles
    result[:after_profiles] = after_profiles
    result[:item] = item
  rescue StandardError => e
    result[:success] = false
    result[:errors] << "Error shifting images for item #{item_id}: #{e.message}"
  end

  result
end

.simulate_shift(current_profiles, prefix) ⇒ Object

Simulates a shift operation for dry run



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# File 'app/services/image/image_shifting_service.rb', line 211

def self.simulate_shift(current_profiles, prefix)
  # This is a simplified simulation - in practice, you might want to duplicate the actual shift logic
  # For now, we'll just return the current profiles as-is
  current_profiles
end