Class: Cctv::Tracker

Inherits:
Object
  • Object
show all
Defined in:
lib/cctv/tracker.rb

Instance Method Summary collapse

Constructor Details

#initialize(table_name, aws_config = {}) ⇒ Tracker

Returns a new instance of Tracker.



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# File 'lib/cctv/tracker.rb', line 5

def initialize(table_name, aws_config = {})
  @table_name = table_name.to_s

  access_key_id     = aws_config.fetch(:access_key_id) { env.fetch('AWS_ACCESS_KEY_ID') }
  secret_access_key = aws_config.fetch(:secret_access_key) { env.fetch('AWS_SECRET_ACCESS_KEY') }
  region            = aws_config.fetch(:region) { env.fetch('AWS_REGION') }

  @client = Aws::DynamoDB::Client.new(
    access_key_id:     access_key_id,
    secret_access_key: secret_access_key,
    region:            region
  )
end

Instance Method Details

#record_activity(target, actor, additional_data = {}) ⇒ Object 



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# File 'lib/cctv/tracker.rb', line 19

def record_activity(target, actor, additional_data = {})
  client.put_item(
    table_name: table_name,
    item: {
      timestamp: Time.now.utc.to_i.to_s,
      actor:     actor.to_s,
      target:    target.to_s
    }.merge(additional_data),
    return_values: 'NONE',
    return_consumed_capacity: 'TOTAL',
    return_item_collection_metrics: 'NONE',
  )
end

#view_activity(target, time_period_range, params = {}) ⇒ Object 



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# File 'lib/cctv/tracker.rb', line 33

def view_activity(target, time_period_range, params = {})
  limit              = params.fetch(:limit, 25)
  consistent_read    = params.fetch(:consistent_read, false)
  scan_index_forward = params.fetch(:scan_index_forward, true)
  attributes_to_get  = params.fetch(:attributes_to_get, nil)

  select = (attributes_to_get && attributes_to_get == :all) ? 'SPECIFIC_ATTRIBUTES' : 'ALL_ATTRIBUTES'

  client.query(
    table_name: table_name,
    select: select,
    attributes_to_get: attributes_to_get,
    limit: limit,
    consistent_read: consistent_read,
    key_conditions: {
      'target' => {
        attribute_value_list: [
          target.to_s,
        ],
        comparison_operator: 'EQ',
      },
      'timestamp' => {
        attribute_value_list: [
          (time_period_range.min.to_i).to_s,
          (time_period_range.max.to_i).to_s
        ],
        comparison_operator: 'BETWEEN'
      }
    },
    scan_index_forward: true,
    return_consumed_capacity: 'TOTAL',
  ).items
end