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The initial implementation of a Whereable query filter for KameSame.
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class Whereable | |
def initialize(where:, model: Item, ranking_conditions: [], valid: true, data_source: nil) | |
@model = model | |
@where = where | |
@data_source = data_source | |
@ranking_conditions = ranking_conditions | |
@valid = valid | |
end | |
def valid? | |
@valid | |
end | |
def where | |
return unless @valid | |
@valid = if !@data_source.present? || | |
data_source_results.present? | |
normalize_where(@where, args: [data_source_results]) | |
end | |
end | |
def ranking_conditions | |
return unless @valid | |
if @ranking_conditions.respond_to?(:call) | |
normalize_rankings(@ranking_conditions.call(data_source_results)) | |
else | |
normalize_rankings(@ranking_conditions) | |
end | |
end | |
private | |
def data_source_results | |
@data_source_results ||= @data_source&.call | |
end | |
def sanitize(sql, *values) | |
ActiveRecord::Base.sanitize_sql_for_conditions([sql, *values]) | |
end | |
def normalize_where(where, args: []) | |
if where.respond_to?(:to_sql) | |
where | |
elsif where.respond_to?(:call) | |
normalize_where(where.call(*args.compact)) | |
else | |
@model.where(*sanitize(*@where)) | |
end | |
end | |
def normalize_rankings(rankings) | |
Array.wrap(rankings).map { |ranking| | |
if ranking.is_a?(Array) | |
sanitize(*ranking) | |
else | |
ranking | |
end | |
} | |
end | |
end |
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