90 lines
2.8 KiB
Ruby
90 lines
2.8 KiB
Ruby
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require 'handlebars_renderer'
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require 'sendgrid_client'
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class CreateEmail
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class InvalidRequest < StandardError
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attr_reader :request_result
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def initialize(request_result)
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super()
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@request_result = request_result
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end
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end
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class InvalidTemplate < StandardError
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end
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attr_reader :mailbox,
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:handlebars_renderer,
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:sendgrid_client
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def initialize(mailbox,
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handlebars_renderer: HandlebarsRenderer.new,
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sendgrid_client_class: SendgridClient)
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@mailbox = mailbox
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@handlebars_renderer = handlebars_renderer
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@sendgrid_client = sendgrid_client_class.new(mailbox.sendgrid_api_token)
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end
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def call(request_payload)
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validate_email_payload_against_sendgrid!(request_payload)
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template = retrieve_template_payload(template_id(request_payload))
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render_personalizations(request_payload, template)
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end
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private
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def validate_email_payload_against_sendgrid!(request_payload)
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result = sendgrid_client.validate_request(request_payload)
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raise InvalidRequest.new(result.original_response) unless result.valid
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end
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def retrieve_template_payload(template_id)
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result = sendgrid_client.get_template(template_id)
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raise InvalidTemplate if result.blank?
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result
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end
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def render_personalizations(request_payload, template)
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request_payload['personalizations'].each_with_index do |personalization, index|
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template_version = latest_template_version(template)
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Email.new(mailbox: mailbox,
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request_payload: request_payload,
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template_payload: template,
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template_id: template_version['id'],
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personalization_id: index,
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rendered_html: render_html(template_version, personalization),
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rendered_plain_text: render_plaintext(template_version, personalization),
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subject: render_subject(template_version, personalization)
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).save!
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end
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end
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def render_subject(template_version, personalization)
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handlebars_renderer.render(template_version['subject'],
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{ 'subject' => personalization['subject'] })
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end
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def render_html(template_version, personalization)
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handlebars_renderer.render(template_version['html_content'],
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personalization['dynamic_template_data'])
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end
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def render_plaintext(template_version, personalization)
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if template_version['generate_plain_content']
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document = Nokogiri::HTML(render_html(template_version, personalization))
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document.text()
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else
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handlebars_renderer.render(template_version['plain_content'], personalization)
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end
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end
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def template_id(request_payload)
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request_payload['template_id']
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end
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def latest_template_version(template)
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template['versions'].last
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end
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end
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