Class: TopicsFilter

Inherits:
Object
  • Object
show all
Defined in:
lib/topics_filter.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(guardian:, scope: Topic.all) ⇒ TopicsFilter

Returns a new instance of TopicsFilter.



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# File 'lib/topics_filter.rb', line 6

def initialize(guardian:, scope: Topic.all)
  @guardian = guardian
  @scope = scope
  @topic_notification_levels = Set.new
end

Instance Attribute Details

#topic_notification_levels ⇒ Object (readonly)

Returns the value of attribute topic_notification_levels.



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# File 'lib/topics_filter.rb', line 4

def topic_notification_levels
  @topic_notification_levels
end

Instance Method Details

#filter_from_query_string(query_string) ⇒ Object 



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# File 'lib/topics_filter.rb', line 15

def filter_from_query_string(query_string)
  return @scope if query_string.blank?

  filters = {}

  query_string.scan(
    /(?<key_prefix>(?:-|=|-=|=-))?(?<key>[\w-]+):(?<value>[^\s]+)/,
  ) do |key_prefix, key, value|
    key = FILTER_ALIASES[key] || key

    filters[key] ||= {}
    filters[key]["key_prefixes"] ||= []
    filters[key]["key_prefixes"] << key_prefix
    filters[key]["values"] ||= []
    filters[key]["values"] << value
  end

  filters.each do |filter, hash|
    key_prefixes = hash["key_prefixes"]
    values = hash["values"]

    filter_values = extract_and_validate_value_for(filter, values)

    case filter
    when "activity-before"
      filter_by_activity(before: filter_values)
    when "activity-after"
      filter_by_activity(after: filter_values)
    when "category"
      filter_categories(values: key_prefixes.zip(filter_values))
    when "created-after"
      filter_by_created(after: filter_values)
    when "created-before"
      filter_by_created(before: filter_values)
    when "created-by"
      filter_created_by_user(usernames: filter_values.flat_map { |value| value.split(",") })
    when "in"
      filter_in(values: filter_values)
    when "latest-post-after"
      filter_by_latest_post(after: filter_values)
    when "latest-post-before"
      filter_by_latest_post(before: filter_values)
    when "likes-min"
      filter_by_number_of_likes(min: filter_values)
    when "likes-max"
      filter_by_number_of_likes(max: filter_values)
    when "likes-op-min"
      filter_by_number_of_likes_in_first_post(min: filter_values)
    when "likes-op-max"
      filter_by_number_of_likes_in_first_post(max: filter_values)
    when "order"
      order_by(values: filter_values)
    when "posts-min"
      filter_by_number_of_posts(min: filter_values)
    when "posts-max"
      filter_by_number_of_posts(max: filter_values)
    when "posters-min"
      filter_by_number_of_posters(min: filter_values)
    when "posters-max"
      filter_by_number_of_posters(max: filter_values)
    when "status"
      filter_values.each { |status| @scope = filter_status(status: status) }
    when "tag"
      filter_tags(values: key_prefixes.zip(filter_values))
    when "views-min"
      filter_by_number_of_views(min: filter_values)
    when "views-max"
      filter_by_number_of_views(max: filter_values)
    end
  end

  @scope
end

#filter_status(status:, category_id: nil) ⇒ Object 



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# File 'lib/topics_filter.rb', line 89

def filter_status(status:, category_id: nil)
  case status
  when "open"
    @scope = @scope.where("NOT topics.closed AND NOT topics.archived")
  when "closed"
    @scope = @scope.where("topics.closed")
  when "archived"
    @scope = @scope.where("topics.archived")
  when "listed"
    @scope = @scope.where("topics.visible")
  when "unlisted"
    @scope = @scope.where("NOT topics.visible")
  when "deleted"
    category = category_id.present? ? Category.find_by(id: category_id) : nil

    if @guardian.can_see_deleted_topics?(category)
      @scope = @scope.unscope(where: :deleted_at).where("topics.deleted_at IS NOT NULL")
    end
  when "public"
    @scope = @scope.joins(:category).where("NOT categories.read_restricted")
  end

  @scope
end