Leaves_Ga-Young

main.rb

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+# Ga-Young Jin, Cohort 12
+# Monday, August 19th, 2019
+# Week 3, Solar System Project
+
+require_relative 'planet'
+require_relative 'solar_system'
+
+def main
+  # initiating new solar system and planets
+  solar_system = SolarSystem.new('Sol')
+  earth = Planet.new('Earth', 'blue-green', 5.972e24, 1.496e8, 'Only planet known to support life')
+  mars = Planet.new('Mars', 'red', 6.39e23, 2.28e8, 'The planet is named after Mars, the Roman god of war')
+
+  solar_system.add_planet(earth)
+  solar_system.add_planet(mars)
+
+  # user interaction to explore and search through planets
+  do_next = nil
+  until do_next == "EXIT" || do_next == "4"
+    puts "\nWhat would you like to do?
+    1. List planets
+    2. Get planet details
+    3. Add planet
+    4. Exit\n"
+
+    do_next = gets.chomp
+
+    case do_next
+    when "LIST PLANETS", "1"
+      puts solar_system.list_planets
+    when "GET PLANET DETAILS", "2"
+      puts solar_system.planet_details
+    when "ADD PLANET", "3"
+      solar_system.add_new_planet
+    when "EXIT", "4"
+    else
+      puts "\nYou have entered an invalid response. Please try again."
+    end
+  end
+end
+
+main
+
+

planet.rb

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+# Ga-Young Jin, Cohort 12
+# Monday, August 19th, 2019
+# Week 3, Solar System Project
+
+class Planet 
+  attr_reader :name, :color, :mass_kg, :distance_from_sun_km, :fun_fact
+
+  def initialize(name, color, mass_kg, distance_from_sun_km, fun_fact)
+    @name = name
+    @color = color
+    @mass_kg = mass_kg
+    @distance_from_sun_km = distance_from_sun_km
+    @fun_fact = fun_fact
+  end
+
+  # method that returns a nice summary of a planet
+  def summary
+    return "\nThis planet is called #{@name}. It is #{@color} in color, #{@mass_kg} kilograms in weight, 
+    and #{@distance_from_sun_km} kilometers from the sun. A fun fact about this planet: #{@fun_fact}."
+  end
+end

solar_system.rb

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+# Ga-Young Jin, Cohort 12
+# Monday, August 19th, 2019
+# Week 3, Solar System Project
+
+class SolarSystem
+  def initialize(star_name)
+    @star_name = star_name
+    @planets = []
+  end 
+
+  attr_reader :star_name, :planets
+
+  # method to add a new planet to the planet array
+  def add_planet(planet)
+    @planets << planet
+  end
+
+  # method to list all planets in the planet array
+  def list_planets
+    planet_count = 1
+    list = "\nPlanets orbiting #{star_name} \n"
+    @planets.each do |planet|
+      list = list + "#{planet_count}. #{planet.name} \n"
+      planet_count += 1
+    end
+    return list
+  end
+
+  # method that asks user for a planet to search and passes to find_planet_by_name method
+  def planet_details
+    puts "\nFor which planet would you like details?"
+    chosen_planet = gets.chomp
+    find_planet_by_name(chosen_planet)
+  end
+
+  # method that searches for planet and returns that planet's summary
+  def find_planet_by_name(search_planet_name)
+    @planets.each do |planet|
+      if search_planet_name.upcase == planet.name.upcase
+        return planet.summary
+      end
+    end
+    return "\nThere is no planet by that name." 
+  end
+
+  # method to add a new planet
+  def add_new_planet
+    puts "\nWhat is the name of this new planet?"
+    new_name = gets.chomp
+
+    puts "\nWhat is the color of this new planet?"
+    new_color = gets.chomp
+
+    puts "\nHow much does this new planet weigh in kilograms?"
+    new_weight = gets.chomp.to_i
+    while new_weight < 0
+      puts "\nThe weight cannot be less than 0. Please enter another value."
+      new_weight = gets.chomp.to_i
+    end
+
+    puts "\nHow far is this new planet from the sun in kilometers?"
+    new_distance = gets.chomp.to_i
+    while new_distance < 0
+      puts "\nThe distance cannot be less than 0. Please enter another value."
+      new_distance = gets.chomp.to_i
+    end
+
+    puts "\nWhat is a fun fact about this new planet?"
+    new_fact = gets.chomp
+
+    new_planet = Planet.new(new_name, new_color, new_weight, new_distance, new_fact) 
+    add_planet(new_planet)
+
+    puts "\nThe new planet, #{new_name}, was added to the list."
+  end
+end
+
+