[Feature] Email collect message hooks (#331)

- Add email collect hook on creating conversation
- Merge contact if it already exist

app/services/message_templates/hook_execution_service.rb

@@ -0,0 +1,20 @@
+class MessageTemplates::HookExecutionService
+  pattr_initialize [:message!]
+
+  def perform
+    ::MessageTemplates::Template::EmailCollect.new(conversation: conversation).perform if should_send_email_collect?
+  end
+
+  private
+
+  delegate :inbox, :conversation, to: :message
+  delegate :contact, to: :conversation
+
+  def first_message_from_contact?
+    conversation.messages.outgoing.count.zero? && conversation.messages.template.count.zero?
+  end
+
+  def should_send_email_collect?
+    conversation.inbox.web_widget? && first_message_from_contact?
+  end
+end

app/services/message_templates/template/email_collect.rb

@@ -0,0 +1,56 @@
+class MessageTemplates::Template::EmailCollect
+  pattr_initialize [:conversation!]
+
+  def perform
+    ActiveRecord::Base.transaction do
+      conversation.messages.create!(typical_reply_message_params)
+      conversation.messages.create!(ways_to_reach_you_message_params)
+      conversation.messages.create!(email_input_box_template_message_params)
+    end
+  rescue StandardError => e
+    Raven.capture_exception(e)
+    true
+  end
+
+  private
+
+  delegate :contact, :account, to: :conversation
+  delegate :inbox, to: :message
+
+  def typical_reply_message_params
+    content = I18n.t('conversations.templates.typical_reply_message_body',
+                     account_name: account.name)
+
+    {
+      account_id: @conversation.account_id,
+      inbox_id: @conversation.inbox_id,
+      message_type: :template,
+      content: content
+    }
+  end
+
+  def ways_to_reach_you_message_params
+    content = I18n.t('conversations.templates.ways_to_reach_you_message_body',
+                     account_name: account.name)
+
+    {
+      account_id: @conversation.account_id,
+      inbox_id: @conversation.inbox_id,
+      message_type: :template,
+      content: content
+    }
+  end
+
+  def email_input_box_template_message_params
+    content = I18n.t('conversations.templates.email_input_box_message_body',
+                     account_name: account.name)
+
+    {
+      account_id: @conversation.account_id,
+      inbox_id: @conversation.inbox_id,
+      message_type: :template,
+      content_type: :input_email,
+      content: content
+    }
+  end
+end

app/services/widget/token_service.rb

@@ -0,0 +1,21 @@
+class Widget::TokenService
+  pattr_initialize [:payload, :token]
+
+  def generate_token
+    JWT.encode payload, secret_key, 'HS256'
+  end
+
+  def decode_token
+    JWT.decode(
+      token, secret_key, true, algorithm: 'HS256'
+    ).first.symbolize_keys
+  rescue StandardError
+    {}
+  end
+
+  private
+
+  def secret_key
+    Rails.application.secrets.secret_key_base
+  end
+end