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67 lines
1.6 KiB
67 lines
1.6 KiB
# frozen_string_literal: true |
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class Webhooks::PayloadRenderer |
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class DocumentTraverser |
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INT_REGEX = /[0-9]+/ |
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def initialize(document) |
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@document = document.with_indifferent_access |
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end |
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def get(path) |
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value = @document.dig(*parse_path(path)) |
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string = Oj.dump(value) |
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# We want to make sure people can use the variable inside |
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# other strings, so it can't be wrapped in quotes. |
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if value.is_a?(String) |
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string[1...-1] |
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else |
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string |
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end |
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end |
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private |
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def parse_path(path) |
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path.split('.').filter_map do |segment| |
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if segment.match(INT_REGEX) |
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segment.to_i |
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else |
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segment.presence |
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end |
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end |
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end |
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end |
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class TemplateParser < Parslet::Parser |
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rule(:dot) { str('.') } |
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rule(:digit) { match('[0-9]') } |
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rule(:property_name) { match('[a-z_]').repeat(1) } |
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rule(:array_index) { digit.repeat(1) } |
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rule(:segment) { (property_name | array_index) } |
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rule(:path) { property_name >> (dot >> segment).repeat } |
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rule(:variable) { (str('}}').absent? >> path).repeat.as(:variable) } |
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rule(:expression) { str('{{') >> variable >> str('}}') } |
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rule(:text) { (str('{{').absent? >> any).repeat(1) } |
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rule(:text_with_expressions) { (text.as(:text) | expression).repeat.as(:text) } |
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root(:text_with_expressions) |
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end |
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EXPRESSION_REGEXP = / |
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\{\{ |
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[a-z_]+ |
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(\. |
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([a-z_]+|[0-9]+) |
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)* |
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\}\} |
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/iox |
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def initialize(json) |
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@document = DocumentTraverser.new(Oj.load(json)) |
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end |
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def render(template) |
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template.gsub(EXPRESSION_REGEXP) { |match| @document.get(match[2...-2]) } |
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end |
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end
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