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Contents
# frozen_string_literal: true
module Motor
module Queries
module RenderSqlTemplate
SECTION_OPEN_REGEXP = /{{([#^])\s*(\w+)}}.*\z/m.freeze
VARIABLE_REGEXP = /{{\s*(\w+)\s*}}/m.freeze
module_function
def call(sql, variables)
result = render_sections(sql, variables)
interpolate_variables(result, variables)
end
def interpolate_variables(sql, variables)
selected_variables = []
rendered =
sql.gsub(VARIABLE_REGEXP) do
variable_name = Regexp.last_match[1]
index = selected_variables.index { |name, _| name == variable_name }
selected_variables << [variable_name, variables[variable_name]] unless index
"$#{selected_variables.size}"
end
[rendered, selected_variables]
end
def render_sections(sql, variables)
sql.sub(SECTION_OPEN_REGEXP) do |e|
variable_name = Regexp.last_match[2]
is_negative = Regexp.last_match[1] == '^'
_, content, rest = e.split(build_section_close_regexp(variable_name), 3)
is_present = variables[variable_name].present?
render_sections(is_present ^ is_negative ? content + rest.to_s : rest, variables)
end
end
def build_section_close_regexp(variable_name)
%r{{{[#^/]s*#{Regexp.escape(variable_name)}\s*}}}m
end
end
end
end
Version data entries
30 entries across 30 versions & 1 rubygems