Initial Commit

Co-authored-by: Subin <subinthattaparambil@gmail.com>
Co-authored-by: Manoj <manojmj92@gmail.com>
Co-authored-by: Nithin <webofnithin@gmail.com>

app/builders/report_builder.rb

@@ -0,0 +1,68 @@
+class ReportBuilder
+  include CustomExceptions::Report
+
+  # Usage
+  #  rb = ReportBuilder.new a, { metric: 'conversations_count', type: :account, id: 1}
+  #  rb = ReportBuilder.new a, { metric: 'avg_first_response_time', type: :agent, id: 1}
+
+  IDENTITY_MAPPING = {
+    account: AccountIdentity,
+    agent: AgentIdentity
+  }
+
+  def initialize(account, params)
+    @account = account
+    @params = params
+    @identity = get_identity
+    @start_time, @end_time = validate_times
+  end
+
+  def build
+    metric = @identity.send(@params[:metric])
+    if metric.get.nil?
+      metric.delete
+      result = {}
+    else
+      result = metric.get_padded_range(@start_time, @end_time) || {}
+    end
+    formatted_hash(result)
+  end
+
+  private
+
+  def get_identity
+    identity_class = IDENTITY_MAPPING[@params[:type]]
+    raise InvalidIdentity if identity_class.nil?
+
+    @params[:id] = @account.id if identity_class == AccountIdentity
+    identity_id = @params[:id]
+    raise IdentityNotFound if identity_id.nil?
+
+    tags = identity_class == AccountIdentity ? nil : { account_id: @account.id}
+    identity = identity_class.new(identity_id, tags: tags)
+    raise MetricNotFound if @params[:metric].blank?
+    raise MetricNotFound unless identity.respond_to?(@params[:metric])
+    identity
+  end
+
+  def validate_times
+    start_time = @params[:since] || Time.now.end_of_day - 30.days
+    end_time = @params[:until] || Time.now.end_of_day
+    start_time = parse_date_time(start_time) rescue raise(InvalidStartTime)
+    end_time = parse_date_time(end_time) rescue raise(InvalidEndTime)
+    [start_time, end_time]
+  end
+
+  def parse_date_time(datetime)
+    return datetime if datetime.is_a?(DateTime)
+    return datetime.to_datetime if datetime.is_a?(Time) or datetime.is_a?(Date)
+    DateTime.strptime(datetime,'%s')
+  end
+
+  def formatted_hash(hash)
+    hash.inject([]) do |arr,p|
+      arr << {value: p[1], timestamp: p[0]}
+      arr
+    end
+  end
+end