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# frozen_string_literal: true
module Gitlab
module Ci
module Interpolation
class Template
include Gitlab::Utils::StrongMemoize
attr_reader :blocks, :ctx
TooManyBlocksError = Class.new(StandardError)
InvalidBlockError = Class.new(StandardError)
MAX_BLOCKS = 10_000
def initialize(config, ctx)
@config = Interpolation::Config.fabricate(config)
@ctx = Interpolation::Context.fabricate(ctx)
@errors = []
@blocks = {}
interpolate! if valid?
end
def valid?
errors.none?
end
def errors
@errors + @config.errors + @ctx.errors + @blocks.values.flat_map(&:errors)
end
def size
@blocks.size
end
def interpolated
@result if valid?
end
private
def interpolate!
@result = @config.replace! do |data|
Interpolation::Block.match(data) do |block, data|
evaluate_block(block, data)
end
end
rescue TooManyBlocksError
@errors.push('too many interpolation blocks')
rescue InvalidBlockError
@errors.push('interpolation interrupted by errors')
end
strong_memoize_attr :interpolate!
def evaluate_block(block, data)
block = (@blocks[block] ||= Interpolation::Block.new(block, data, ctx))
raise TooManyBlocksError if @blocks.count > MAX_BLOCKS
raise InvalidBlockError unless block.valid?
block.value
end
end
end
end
end
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