Time - Nataliya

ride_share.rb

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+########################################################
+# Step 1: Establish the layers
+
+# In this section of the file, as a series of comments,
+# create a list of the layers you identify.
+# Which layers are nested in each other?
+
+# Drivers (array) -> driver (hash) -> rides (array) -> ride (hash)
+# ( "->" represents nesting)
+
+# Which layers of data "have" within it a different layer?
+
+# Drivers is an array of hashes which hold data for each individual driver.
+# Each driver hash includes an array of rides.
+# Array of rides consist of hashes with data for each ride.
+
+# Which layers are "next" to each other?
+
+# Driver ID and an array of rides are on the same layer. 
+# (within individual driver hashes)
+# Ride ID, date, rider ID, cost and rating are on the same layer.
+# (within individual ride hashes)
+
+########################################################
+# Step 2: Assign a data structure to each layer
+
+# Copy your list from above, and in this section
+# determine what data structure each layer should have
+
+# Drivers (array) -> driver (hash) -> driver_id (string)
+#                                  -> rides (array) -> ride (hash) -> ride_id (integer)
+#                                                                  -> date (string)
+#                                                                  -> rider_id (string)
+#                                                                  -> cost (integer)
+#                                                                  -> rating (integer)
+
+########################################################
+# Step 3: Make the data structure!
+
+# Setup the entire data structure:
+# based off of the notes you have above, create the
+# and manually write in data presented in rides.csv
+# You should be copying and pasting the literal data
+# into this data structure, such as "DR0004"
+# and "3rd Feb 2016" and "RD0022"
+
+drivers = [
+  {
+    driver_id: "DR0001",
+    rides: [
+      {
+        ride_id: 1,
+        date: "Feb 3 2016",
+        rider_id: "RD0003",
+        cost: 10,
+        rating: 3
+      },
+      {
+        ride_id: 2,
+        date: "Feb 3 2016",
+        rider_id: "RD0015",
+        cost: 30,
+        rating: 4
+      },
+      {
+        ride_id: 3,
+        date: "Feb 5 2016",
+        rider_id: "RD0003",
+        cost: 45,
+        rating: 2
+      }
+    ]
+  },
+  {
+    driver_id: "DR0002",
+    rides: [
+      {
+        ride_id: 4,
+        date: "Feb 3 2016",
+        rider_id: "RD0073",
+        cost: 25,
+        rating: 5
+      },
+      {
+        ride_id: 5,
+        date: "Feb 4 2016",
+        rider_id: "RD0013",
+        cost: 15,
+        rating: 1
+      },
+      {
+        ride_id: 6,
+        date: "Feb 5 2016",
+        rider_id: "RD0066",
+        cost: 35,
+        rating: 3
+      }     
+    ]
+  },
+  {
+    driver_id: "DR0003",
+    rides: [
+      {
+        ride_id: 7,
+        date: "Feb 4 2016",
+        rider_id: "RD0066",
+        cost: 5,
+        rating: 5
+      },
+      {
+        ride_id: 8,
+        date: "Feb 5 2016",
+        rider_id: "RD0003",
+        cost: 20,
+        rating: 5
+      }     
+    ]
+  },
+  {
+    driver_id: "DR0004",
+    rides: [
+      {
+        ride_id: 9,
+        date: "Feb 3 2016",
+        rider_id: "RD0022",
+        cost: 5,
+        rating: 5
+      },
+      {
+        ride_id: 10,
+        date: "Feb 4 2016",
+        rider_id: "RD0022",
+        cost: 10,
+        rating: 4
+      },
+      {
+        ride_id: 11,
+        date: "Feb 5 2016",
+        rider_id: "RD0073",
+        cost: 10,
+        rating: 4
+      }  
+    ]
+  },
+]
+
+########################################################
+# Step 4: Total Driver's Earnings and Number of Rides
+
+# Use an iteration blocks to print the following answers:
+# - the number of rides each driver has given
+# - the total amount of money each driver has made
+# - the average rating for each driver
+# - Which driver made the most money?
+# - Which driver has the highest average rating?
+
+# METHODS
+
+# Adding the following stats for every driver in the data structure:
+# 1: number of rides given
+# 2: total amount of money made
+# 3: average rating
+
+def get_stats(drivers)
+  drivers.each do |driver|
+    driver[:stats] = {}
+    # number of rides given
+    driver[:stats][:rides_num] = driver[:rides].length 
+    # total amount of money made
+    driver[:stats][:income_total] = driver[:rides].sum do |ride|
+      ride[:cost]
+    end
+    # average rating
+    rating_sum = driver[:rides].sum do |ride| 
+      ride[:rating]
+    end
+    driver[:stats][:average_rating] = (rating_sum.to_f/driver[:rides].length).round(2)
+  end
+  return drivers
+end
+
+# Finding drivers with the highest income total
+def find_highest_income(drivers)
+  highest_income = 0
+  highest_income_drivers = []
+  drivers.each do |driver|
+    if driver[:stats][:income_total] > highest_income
+      highest_income = driver[:stats][:income_total]
+      highest_income_drivers.clear << driver[:driver_id]
+    elsif driver[:stats][:income_total] == highest_income
+      highest_income_drivers << driver[:driver_id]
+    end
+  end
+  return highest_income_drivers
+end
+
+# Finding drivers with highest average rating
+def find_highest_rating(drivers)
+  highest_rating = 0
+  highest_rating_drivers = []
+  drivers.each do |driver|
+    if driver[:stats][:average_rating] > highest_rating
+      highest_rating = driver[:stats][:average_rating]
+      highest_rating_drivers.clear << driver[:driver_id]
+    elsif driver[:stats][:average_rating] == highest_rating
+      highest_rating_drivers << driver[:driver_id]
+    end
+  end
+  return highest_rating_drivers
+end
+
+# Printing data to the console
+def print_data(drivers, highest_income_drivers, highest_rating_drivers)
+  puts "DRIVERS DATA:\n\n"
+  drivers.each do |driver|
+    puts "Driver #{driver[:driver_id]} has given #{driver[:stats][:rides_num]} rides."
+    puts "Their income total is $#{driver[:stats][:income_total]} and their average rating is #{driver[:stats][:average_rating]}.\n\n"
+  end
+
+  if highest_income_drivers.length == 1
+    puts "Driver with the highest total income is #{highest_income_drivers[0]}."
+  else
+    message = "Drivers with the highest total income are"
+    highest_income_drivers.each do |highest_income_driver|
+      message << " #{highest_income_driver},"
+    end
+      message = message.chop
+      message << ".\n\n"
+      puts message
+  end
+
+  if highest_rating_drivers.length == 1
+    print "Driver with the highest average rating is #{highest_rating_drivers[0]}."
+  else
+    message = "Drivers with the highest average rating are"
+    highest_rating_drivers.each do |highest_rating_driver|
+      message << " #{highest_rating_driver},"
+    end
+      message = message.chop
+      message << "."
+      puts message
+  end
+end
+
+# Calling methods
+get_stats(drivers)
+highest_income_drivers = find_highest_income(drivers)
+highest_rating_drivers = find_highest_rating(drivers)
+print_data(drivers, highest_income_drivers, highest_rating_drivers)