Helps to find available covid vaccination slots

covid_vaccination_slot_finder.rb

# District - Bangalore Urban, Date - Today's date. You can modify it as per your requirement.
uri = URI.parse("https://cdn-api.co-vin.in/api/v2/appointment/sessions/public/calendarByDistrict?district_id=363&date=#{Date.today.strftime('%d-%m-%Y')}")

results = Net::HTTP.get(uri) 
results = JSON.parse(result).with_indifferent_access

availability = {}
result[:centers].each do |center|
    # 1st condition - Checking Age
    sessions = center[:sessions].select{ |c| c[:min_age_limit] == 18 }
    # 2nd condition - Checking Availability
    sessions_with_availability = sessions.select{ |s| s[:available_capacity] > 0 }
    # Collect date for specific pincode if there's vaccine availability
    availability[center[:pincode]] = sessions_with_availability.collect{ |s| s[:date] } if sessions_with_availability.any?
end

availability
# {413102=>["10-05-2021"], 411044=>["11-05-2021"]}