Add API support for querying admin reports by date range

app/models/email_log.rb

@@ -13,8 +13,8 @@ class EmailLog < ActiveRecord::Base
     User.where(id: user_id).update_all("last_emailed_at = CURRENT_TIMESTAMP") if user_id.present? and !skipped
   end
 
-  def self.count_per_day(sinceDaysAgo = 30)
-    where('created_at > ? and skipped = false', sinceDaysAgo.days.ago).group('date(created_at)').order('date(created_at)').count
+  def self.count_per_day(start_date, end_date)
+    where('created_at >= ? and created_at < ? AND skipped = false', start_date, end_date).group('date(created_at)').order('date(created_at)').count
   end
 
   def self.for(reply_key)
@@ -22,8 +22,7 @@ class EmailLog < ActiveRecord::Base
   end
 
   def self.last_sent_email_address
-    where(email_type: 'signup').order('created_at DESC')
-                               .first.try(:to_address)
+    where(email_type: 'signup').order('created_at DESC').first.try(:to_address)
   end
 
 end

app/models/report.rb

@@ -39,8 +39,8 @@ class Report
     # Load the report
     report = Report.new(type)
 
-    report.start_date = opts[:start_date]
-    report.end_date = opts[:end_date]
+    report.start_date = opts[:start_date] if opts[:start_date]
+    report.end_date = opts[:end_date] if opts[:end_date]
     send(report_method, report)
     report
   end
@@ -70,7 +70,7 @@ class Report
   end
 
   def self.report_about(report, subject_class, report_method = :count_per_day)
-    basic_report_about report, subject_class, report_method, default_days
+    basic_report_about report, subject_class, report_method, report.start_date, report.end_date
     add_counts(report, subject_class)
   end
 

app/models/user.rb

@@ -531,8 +531,8 @@ class User < ActiveRecord::Base
         .limit(3)
   end
 
-  def self.count_by_signup_date(sinceDaysAgo=30)
-    where('created_at > ?', sinceDaysAgo.days.ago).group('date(created_at)').order('date(created_at)').count
+  def self.count_by_signup_date(start_date, end_date)
+    where('created_at >= ? and created_at < ?', start_date, end_date).group('date(created_at)').order('date(created_at)').count
   end