Class: FlowChat::Whatsapp::Client

Inherits:
Object
  • Object
show all
Includes:
Instrumentation
Defined in:
lib/flow_chat/whatsapp/client.rb

Instance Method Summary collapse

Methods included from Instrumentation

#instrument, instrument, report_api_error

Constructor Details

#initialize(config) ⇒ Client

Returns a new instance of Client.



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# File 'lib/flow_chat/whatsapp/client.rb', line 12

def initialize(config)
  @config = config
  FlowChat.logger.info { "WhatsApp::Client: Initialized WhatsApp client for phone_number_id: #{@config.phone_number_id}" }
  FlowChat.logger.debug { "WhatsApp::Client: API base URL: #{FlowChat::Config.whatsapp.api_base_url}" }
end

Instance Method Details

#build_message_payload(response, to) ⇒ Object

Build message payload for WhatsApp API This method is exposed so the gateway can use it for simulator mode



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# File 'lib/flow_chat/whatsapp/client.rb', line 303

def build_message_payload(response, to)
  type, content, options = response

  case type
  when :text
    {
      messaging_product: "whatsapp",
      to: to,
      type: "text",
      text: {body: content}
    }
  when :interactive_buttons
    interactive_payload = {
      type: "button",
      body: {text: content},
      action: {
        buttons: options[:buttons].map.with_index do |button, index|
          {
            type: "reply",
            reply: {
              id: button[:id] || index.to_s,
              title: button[:title]
            }
          }
        end
      }
    }

    # Add header if provided (for media support)
    if options[:header]
      interactive_payload[:header] = options[:header]
    end

    {
      messaging_product: "whatsapp",
      to: to,
      type: "interactive",
      interactive: interactive_payload
    }
  when :interactive_list
    {
      messaging_product: "whatsapp",
      to: to,
      type: "interactive",
      interactive: {
        type: "list",
        body: {text: content},
        action: {
          button: options[:button_text] || "Choose",
          sections: options[:sections]
        }
      }
    }
  when :template
    {
      messaging_product: "whatsapp",
      to: to,
      type: "template",
      template: {
        name: options[:template_name],
        language: {code: options[:language] || "en_US"},
        components: options[:components] || []
      }
    }
  when :media_image
    {
      messaging_product: "whatsapp",
      to: to,
      type: "image",
      image: build_media_object(options)
    }
  when :media_document
    {
      messaging_product: "whatsapp",
      to: to,
      type: "document",
      document: build_media_object(options)
    }
  when :media_audio
    {
      messaging_product: "whatsapp",
      to: to,
      type: "audio",
      audio: build_media_object(options)
    }
  when :media_video
    {
      messaging_product: "whatsapp",
      to: to,
      type: "video",
      video: build_media_object(options)
    }
  when :media_sticker
    {
      messaging_product: "whatsapp",
      to: to,
      type: "sticker",
      sticker: build_media_object(options)
    }
  else
    # Default to text message
    {
      messaging_product: "whatsapp",
      to: to,
      type: "text",
      text: {body: content.to_s}
    }
  end
end

#download_media(media_id) ⇒ String

Download media content

Parameters:

  • media_id (String) —

    Media ID from WhatsApp

Returns:

  • (String) —

    Media content or nil on error



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# File 'lib/flow_chat/whatsapp/client.rb', line 438

def download_media(media_id)
  media_url = get_media_url(media_id)
  return nil unless media_url

  uri = URI(media_url)
  http = Net::HTTP.new(uri.host, uri.port)
  http.use_ssl = true

  request = Net::HTTP::Get.new(uri)
  request["Authorization"] = "Bearer #{@config.access_token}"

  response = http.request(request)

  if response.is_a?(Net::HTTPSuccess)
    response.body
  else
    FlowChat.logger.error { "WhatsApp::Client: Media download error: #{response.body}" }
    nil
  end
end

#get_media_mime_type(url) ⇒ Object

Get MIME type from URL without downloading (HEAD request)



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# File 'lib/flow_chat/whatsapp/client.rb', line 460

def get_media_mime_type(url)
  require "net/http"

  uri = URI(url)
  http = Net::HTTP.new(uri.host, uri.port)
  http.use_ssl = (uri.scheme == "https")

  # Use HEAD request to get headers without downloading content
  response = http.head(uri.path)
  response["content-type"]
rescue => e
  FlowChat.logger.warn { "WhatsApp::Client: Could not detect MIME type for #{url}: #{e.message}" }
  nil
end

#get_media_url(media_id) ⇒ String

Get media URL from media ID

Parameters:

  • media_id (String) —

    Media ID from WhatsApp

Returns:

  • (String) —

    Media URL or nil on error



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# File 'lib/flow_chat/whatsapp/client.rb', line 416

def get_media_url(media_id)
  uri = URI("#{FlowChat::Config.whatsapp.api_base_url}/#{media_id}")
  http = Net::HTTP.new(uri.host, uri.port)
  http.use_ssl = true

  request = Net::HTTP::Get.new(uri)
  request["Authorization"] = "Bearer #{@config.access_token}"

  response = http.request(request)

  if response.is_a?(Net::HTTPSuccess)
    data = JSON.parse(response.body)
    data["url"]
  else
    FlowChat.logger.error { "WhatsApp::Client: Media API error: #{response.body}" }
    nil
  end
end

#indicate_typing(message_id) ⇒ Hash?

Show a typing indicator in response to an inbound message.

Convenience wrapper around mark_as_read(message_id, typing: true). Note that WhatsApp ties the typing indicator to read-receipt delivery, so calling this also marks the message as read. There is no stop-typing call — the indicator auto-dismisses on the next outbound message or after ~25 seconds.

Parameters:

  • message_id (String) —

    the inbound message id (wamid.*)

Returns:

  • (Hash, nil) —

    parsed API response, or nil on failure



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# File 'lib/flow_chat/whatsapp/client.rb', line 192

def indicate_typing(message_id)
  mark_as_read(message_id, typing: true)
end

#mark_as_read(message_id, typing: false) ⇒ Hash?

Mark an inbound message as read, optionally showing a typing indicator.

WhatsApp Cloud API ties the typing indicator to the mark-as-read call: passing typing: true adds a typing_indicator field to the same request. The indicator auto-dismisses on the next outbound message or after ~25 seconds; there is no separate "stop typing" call.

Parameters:

  • message_id (String) —

    the inbound message id (wamid.*) to mark as read

  • typing (Boolean) (defaults to: false) —

    when true, also show a typing indicator

Returns:

  • (Hash, nil) —

    parsed API response, or nil on failure



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# File 'lib/flow_chat/whatsapp/client.rb', line 171

def mark_as_read(message_id, typing: false)
  payload = {
    messaging_product: "whatsapp",
    status: "read",
    message_id: message_id
  }
  payload[:typing_indicator] = {type: "text"} if typing

  send_read_receipt_payload(payload, message_id)
end

#send_audio(to, audio_url_or_id, mime_type = nil) ⇒ Hash

Send audio message

Parameters:

  • to (String) —

    Phone number in E.164 format

  • audio_url_or_id (String) —

    Audio URL or WhatsApp media ID

  • mime_type (String) (defaults to: nil) —

    Optional MIME type for URLs (e.g., 'audio/mpeg')

Returns:

  • (Hash) —

    API response



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# File 'lib/flow_chat/whatsapp/client.rb', line 146

def send_audio(to, audio_url_or_id, mime_type = nil)
  FlowChat.logger.debug { "WhatsApp::Client: Sending audio to #{to}" }
  send_media_message(to, :audio, audio_url_or_id, mime_type: mime_type)
end

#send_buttons(to, text, buttons) ⇒ Hash

Send interactive buttons

Parameters:

  • to (String) —

    Phone number in E.164 format

  • text (String) —

    Message text

  • buttons (Array) —

    Array of button hashes with :id and :title

Returns:

  • (Hash) —

    API response or nil on error



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# File 'lib/flow_chat/whatsapp/client.rb', line 64

def send_buttons(to, text, buttons)
  FlowChat.logger.debug { "WhatsApp::Client: Sending interactive buttons to #{to} with #{buttons.size} buttons" }
  choices = buttons.each_with_object({}) { |button, hash| hash[button[:id]] = button[:title] }
  send_message(to, text, choices: choices)
end

#send_document(to, document_url_or_id, caption = nil, filename = nil, mime_type = nil) ⇒ Hash

Send document message

Parameters:

  • to (String) —

    Phone number in E.164 format

  • document_url_or_id (String) —

    Document URL or WhatsApp media ID

  • caption (String) (defaults to: nil) —

    Optional caption

  • filename (String) (defaults to: nil) —

    Optional filename

  • mime_type (String) (defaults to: nil) —

    Optional MIME type for URLs (e.g., 'application/pdf')

Returns:

  • (Hash) —

    API response



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# File 'lib/flow_chat/whatsapp/client.rb', line 124

def send_document(to, document_url_or_id, caption = nil, filename = nil, mime_type = nil)
  filename ||= extract_filename_from_url(document_url_or_id) if url?(document_url_or_id)
  FlowChat.logger.debug { "WhatsApp::Client: Sending document to #{to} - filename: #{filename}" }
  send_media_message(to, :document, document_url_or_id, caption: caption, filename: filename, mime_type: mime_type)
end

#send_image(to, image_url_or_id, caption = nil, mime_type = nil) ⇒ Hash

Send image message

Parameters:

  • to (String) —

    Phone number in E.164 format

  • image_url_or_id (String) —

    Image URL or WhatsApp media ID

  • caption (String) (defaults to: nil) —

    Optional caption

  • mime_type (String) (defaults to: nil) —

    Optional MIME type for URLs (e.g., 'image/jpeg')

Returns:

  • (Hash) —

    API response



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# File 'lib/flow_chat/whatsapp/client.rb', line 107

def send_image(to, image_url_or_id, caption = nil, mime_type = nil)
  FlowChat.logger.debug { "WhatsApp::Client: Sending image to #{to} - #{url?(image_url_or_id) ? "URL" : "Media ID"}" }
  media = if url?(image_url_or_id)
    {type: :image, url: image_url_or_id}
  else
    {type: :image, id: image_url_or_id}
  end
  send_message(to, caption, media: media)
end

#send_list(to, text, sections, button_text = "Choose") ⇒ Hash

Send interactive list

Parameters:

  • to (String) —

    Phone number in E.164 format

  • text (String) —

    Message text

  • sections (Array) —

    List sections

  • button_text (String) (defaults to: "Choose") —

    Button text (default: "Choose")

Returns:

  • (Hash) —

    API response or nil on error



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# File 'lib/flow_chat/whatsapp/client.rb', line 76

def send_list(to, text, sections, button_text = "Choose")
  total_items = sections.sum { |section| section[:rows]&.size || 0 }
  FlowChat.logger.debug { "WhatsApp::Client: Sending interactive list to #{to} with #{sections.size} sections, #{total_items} total items" }
  choices = {}
  sections.each { |section| section[:rows]&.each { |row| choices[row[:id]] = row[:title] } }
  send_message(to, text, choices: choices)
end

#send_message(to, prompt, choices: nil, media: nil) ⇒ Hash

Send a message to a WhatsApp number

Parameters:

  • to (String) —

    Phone number in E.164 format

  • response (Array) —

    FlowChat response array [type, content, options]

Returns:

  • (Hash) —

    API response or nil on error



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# File 'lib/flow_chat/whatsapp/client.rb', line 22

def send_message(to, prompt, choices: nil, media: nil)
  FlowChat.logger.info { "WhatsApp::Client: Sending message to #{to}" }
  FlowChat.logger.debug { "WhatsApp::Client: Message content: '#{prompt.to_s.truncate(100)}'" }

  # Use renderer to convert to structured response
  response = FlowChat::Whatsapp::Renderer.new(prompt, choices: choices, media: media).render
  type, content, _options = response

  result = instrument(Events::MESSAGE_SENT, {
    to: to,
    message_type: type.to_s,
    content_length: content.to_s.length,
    platform: :whatsapp
  }) do
    message_data = build_message_payload(response, to)
    send_message_payload(message_data)
  end

  if result
    message_id = result.dig("messages", 0, "id")
    FlowChat.logger.debug { "WhatsApp::Client: Message sent successfully to #{to}, message_id: #{message_id}" }
  else
    FlowChat.logger.error { "WhatsApp::Client: Failed to send message to #{to}" }
  end

  result
end

#send_sticker(to, sticker_url_or_id, mime_type = nil) ⇒ Hash

Send sticker message

Parameters:

  • to (String) —

    Phone number in E.164 format

  • sticker_url_or_id (String) —

    Sticker URL or WhatsApp media ID

  • mime_type (String) (defaults to: nil) —

    Optional MIME type for URLs (e.g., 'image/webp')

Returns:

  • (Hash) —

    API response



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# File 'lib/flow_chat/whatsapp/client.rb', line 156

def send_sticker(to, sticker_url_or_id, mime_type = nil)
  FlowChat.logger.debug { "WhatsApp::Client: Sending sticker to #{to}" }
  send_media_message(to, :sticker, sticker_url_or_id, mime_type: mime_type)
end

#send_template(to, template_name, components = [], language = "en_US") ⇒ Hash

Send a template message

Parameters:

  • to (String) —

    Phone number in E.164 format

  • template_name (String) —

    Template name

  • components (Array) (defaults to: []) —

    Template components

  • language (String) (defaults to: "en_US") —

    Language code (default: "en_US")

Returns:

  • (Hash) —

    API response or nil on error



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# File 'lib/flow_chat/whatsapp/client.rb', line 90

def send_template(to, template_name, components = [], language = "en_US")
  FlowChat.logger.debug { "WhatsApp::Client: Sending template '#{template_name}' to #{to} in #{language}" }
  media = {
    type: :template,
    template_name: template_name,
    components: components,
    language: language
  }
  send_message(to, "", media: media)
end

#send_text(to, text) ⇒ Hash

Send a text message

Parameters:

  • to (String) —

    Phone number in E.164 format

  • text (String) —

    Message text

Returns:

  • (Hash) —

    API response or nil on error



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# File 'lib/flow_chat/whatsapp/client.rb', line 54

def send_text(to, text)
  FlowChat.logger.debug { "WhatsApp::Client: Sending text message to #{to}" }
  send_message(to, text)
end

#send_video(to, video_url_or_id, caption = nil, mime_type = nil) ⇒ Hash

Send video message

Parameters:

  • to (String) —

    Phone number in E.164 format

  • video_url_or_id (String) —

    Video URL or WhatsApp media ID

  • caption (String) (defaults to: nil) —

    Optional caption

  • mime_type (String) (defaults to: nil) —

    Optional MIME type for URLs (e.g., 'video/mp4')

Returns:

  • (Hash) —

    API response



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# File 'lib/flow_chat/whatsapp/client.rb', line 136

def send_video(to, video_url_or_id, caption = nil, mime_type = nil)
  FlowChat.logger.debug { "WhatsApp::Client: Sending video to #{to}" }
  send_media_message(to, :video, video_url_or_id, caption: caption, mime_type: mime_type)
end

#upload_media(file_path_or_io, mime_type, filename = nil) ⇒ String

Upload media file and return media ID

Parameters:

  • file_path_or_io (String, IO) —

    File path or IO object

  • mime_type (String) —

    MIME type of the file (required)

  • filename (String) (defaults to: nil) —

    Optional filename for the upload

Returns:

  • (String) —

    Media ID

Raises:

  • (StandardError) —

    If upload fails



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# File 'lib/flow_chat/whatsapp/client.rb', line 202

def upload_media(file_path_or_io, mime_type, filename = nil)
  FlowChat.logger.info { "WhatsApp::Client: Uploading media file - type: #{mime_type}, filename: #{filename}" }

  raise ArgumentError, "mime_type is required" if mime_type.nil? || mime_type.empty?

  file_size = nil
  if file_path_or_io.is_a?(String)
    # File path
    raise ArgumentError, "File not found: #{file_path_or_io}" unless File.exist?(file_path_or_io)
    filename ||= File.basename(file_path_or_io)
    file_size = File.size(file_path_or_io)
    FlowChat.logger.debug { "WhatsApp::Client: Uploading file from path: #{file_path_or_io} (#{file_size} bytes)" }
    file = File.open(file_path_or_io, "rb")
  else
    # IO object
    file = file_path_or_io
    filename ||= "upload"
    FlowChat.logger.debug { "WhatsApp::Client: Uploading file from IO object" }
  end

  # Upload directly via HTTP
  uri = URI("#{FlowChat::Config.whatsapp.api_base_url}/#{@config.phone_number_id}/media")
  http = Net::HTTP.new(uri.host, uri.port)
  http.use_ssl = true

  FlowChat.logger.debug { "WhatsApp::Client: Uploading to #{uri}" }

  # Prepare multipart form data
  boundary = "----WebKitFormBoundary#{SecureRandom.hex(16)}"

  form_data = []
  form_data << "--#{boundary}"
  form_data << 'Content-Disposition: form-data; name="messaging_product"'
  form_data << ""
  form_data << "whatsapp"

  form_data << "--#{boundary}"
  form_data << "Content-Disposition: form-data; name=\"file\"; filename=\"#{filename}\""
  form_data << "Content-Type: #{mime_type}"
  form_data << ""
  form_data << file.read

  form_data << "--#{boundary}"
  form_data << 'Content-Disposition: form-data; name="type"'
  form_data << ""
  form_data << mime_type

  form_data << "--#{boundary}--"

  body = form_data.join("\r\n")

  request = Net::HTTP::Post.new(uri)
  request["Authorization"] = "Bearer #{@config.access_token}"
  request["Content-Type"] = "multipart/form-data; boundary=#{boundary}"
  request.body = body

  result = instrument(Events::MEDIA_UPLOAD, {
    filename: filename,
    mime_type: mime_type,
    size: file_size,
    platform: :whatsapp
  }) do
    response = http.request(request)

    if response.is_a?(Net::HTTPSuccess)
      data = JSON.parse(response.body)
      media_id = data["id"]
      if media_id
        FlowChat.logger.info { "WhatsApp::Client: Media upload successful - media_id: #{media_id}" }
        {success: true, media_id: media_id}
      else
        FlowChat.logger.error { "WhatsApp::Client: Media upload failed - no media_id in response: #{data}" }
        raise StandardError, "Failed to upload media: #{data}"
      end
    else
      FlowChat.logger.error { "WhatsApp::Client: Media upload error - #{response.code}: #{response.body}" }
      raise StandardError, "Media upload failed: #{response.body}"
    end
  end

  result[:media_id]
rescue => error
  FlowChat.logger.error { "WhatsApp::Client: Media upload exception: #{error.class.name}: #{error.message}" }

  # Instrument the error
  instrument(Events::MEDIA_UPLOAD, {
    filename: filename,
    mime_type: mime_type,
    size: file_size,
    success: false,
    error: error.message,
    platform: :whatsapp
  })

  raise
ensure
  file&.close if file_path_or_io.is_a?(String)
end