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# frozen_string_literal: true
module Gitlab
module Ci
class Config
module Interpolation
##
# Interpolation::Context is a class that represents the data that can be used
# when performing string interpolation on a CI configuration.
#
class Context
ContextTooComplexError = Class.new(StandardError)
NotSymbolizedContextError = Class.new(StandardError)
MAX_DEPTH = 3
attr_reader :variables
def initialize(data, variables: [])
@data = data
@variables = Ci::Variables::Collection.fabricate(variables)
raise ContextTooComplexError if depth > MAX_DEPTH
end
def valid?
errors.none?
end
##
# This method is here because `Context` will be responsible for validating specs, inputs and defaults.
#
def errors
[]
end
def depth
deep_depth(@data)
end
def fetch(field)
@data.fetch(field)
end
def key?(name)
@data.key?(name)
end
def to_h
@data.to_h
end
private
def deep_depth(data, depth = 0)
values = data.values.map do |value|
if value.is_a?(Hash)
deep_depth(value, depth + 1)
else
depth + 1
end
end
values.max.to_i
end
def self.fabricate(context, variables: [])
case context
when Hash
new(context, variables: variables)
when Interpolation::Context
context
else
raise ArgumentError, 'unknown interpolation context'
end
end
end
end
end
end
end
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