Show the list of traffic channels when there's a connection or an endpoint error

• Type: Story
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: None
• Fix Version/s: None
• Component/s: Pages > Content Performance
• Labels: None
• Epic/Theme:
  • Content_Performance_Analytics
• Epic Link: tango-content-performance-enhanced-traffic

Currently, when there's an unexpected error when calling AC, a message is showing in the content performance panel, and the list of traffic channels is not showing.

Now we want to show that list with value "-" in the ase of a complete failure in the call or just when the traffic channels endpoint is not available.

Technical Requirements

• When there is a timeout/error in all the API's responses, or an unexpected error or no valid connection with AC, then the panel shows the message: "An unexpected error occurred". All values in the different sections (total views, total reads, historical views, historical reads and the list of traffic channels) will be displayed with a dash ("-"). 
• When there is a timeout/error in the traffic channels API response, the panel shows the message: "Some data is temporarily unavailable”, and __ the list of traffic channels is displayed with a dash ("-"). 
• In both cases, the placeholder graph will show instead of the traffic channels chart, and the message "Your page has no incoming traffic from traffic channels yet" won't be shown.