Earth - MahaElMais

main.rb

@@ -0,0 +1,91 @@
+require_relative 'planet.rb'
+require_relative 'solar_system.rb'
+
+
+def create_solar_system #factory setup the initial state
+  solar_system = SolarSystem.new('Sol')
+
+  #name, color, mass_kg, distance_from_sun_km, fun_fact
+  earth = Planet.new('Earth', 'Blue', '3.09822e21', '1.12343e6', 'it is nicknamed the blueberry')
+  mercury = Planet.new('Mercury', 'Grey', '3.29903e2', '1.349900e2', 'it has the most craters in the solar system')
+  moon = Planet.new( 'Moon', 'Golden', '1.2332e2', '1.12332e1', 'It has active tectonic systems')
+  venus = Planet.new('Venus', 'orange', '2.323442e2', '3.44211e2', 'A day on Venus is longer than a year on earth')
+
+  solar_system.add_planet(earth)
+  solar_system.add_planet(mercury)
+  solar_system.add_planet(moon)
+  solar_system.add_planet(venus)
+
+  return solar_system
+
+end
+
+def ask_user_choice
+    puts "Welcome to the Planet Info session! What would you like to do?"
+    options = ["list planets", "planet details", "add planet", "exit"]
+    options.each do |choice|
+      puts "*#{choice}"
+    end
+    user_choice = gets.chomp
+    return user_choice
+end
+
+def ask_user_planet_choice
+  puts "What is the name of the planet you wish to learn about?"
+
+  planet_choice = gets.chomp
+
+  return planet_choice
+end
+
+def ask_user_new_planet_details
+  puts "Let's make up a new planet! Give me the details!:"
+  puts "Planet name?"
+  name = gets.chomp.
+  puts "Planet color?"
+  color = gets.chomp
+  puts "Planet's mass in kilograms?"
+  mass = gets.chomp
+  puts "Planet's distance from in the sun in kilometers?"
+  distance = gets.chomp
+  puts "Fun fact about planet?"
+  fun_fact = gets.chomp
+  puts ""
+
+  new_planet = Planet.new(name, color, mass, distance, fun_fact)
+
+  return new_planet
+end
+
+def main
+  my_solar_system = create_solar_system
+  while ask_user_choice != "exit"
+
+    user_choice = ask_user_choice
+
+    case user_choice.upcase
+    when "LIST PLANETS"
+      puts my_solar_system.list_planets
+
+    when "PLANET DETAILS"
+      planet_name = ask_user_planet_choice
+      found_planet = my_solar_system.find_my_planet_by_name(found)
+      if (found_planet) == true
+        puts found_planet.summary
+      else
+        puts "I couldn't find a planet by the name #{planet_name}.\n"
+      end
+
+    when "ADD PLANET"
+      new_planet = ask_user_new_planet_details
+      my_solar_system.add_planet(new_planet)
+
+    when "EXIT"
+      exit
+    else
+      puts "Hmm...I did not get that. Try again?"
+    end
+  end
+
+end
+main #why do we invoke main as the last line of your program?

planet.rb

@@ -0,0 +1,28 @@
+#wave1
+#each instance of this class will keep track of information about a single planet
+
+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
+
+    # if @mass_kg < 0 ||  @distance_from_sun_km < 0
+    #   raise ArgumentError, "Invalid Entry"
+    # end
+  end
+
+  def summary
+    #This method should return (not puts) a string containing a nicely-formatted description of the planet.
+    # Exercise your summary method in the main method.
+    description = "This #{@name} with the color #{@color} has a mass of #{@mass_kg} and is #{@distance_from_sun_km}from
+    the sun. A fun fact about it is: #{@fun_fact}"
+    return description
+  end
+
+end
+

solar_system.rb

@@ -0,0 +1,36 @@
+#wave2
+#SolarSystem is responsible for keeping track of a collection of instances of Planet.
+class SolarSystem # has to have a star and the planets
+   attr_reader :star_name, :planet
+
+   def initialize(star_name)
+    @star_name = star_name # the sun
+    @planets = [] #will store an array of planets
+   end
+
+  # will take an instance of Planet as a parameter and add it to the list of planets.
+   def add_planet(planet)
+    @planets << planet
+   end
+
+  # will return (not puts) a string containing a list of all the planets in the system.
+   def list_planets
+    list = "Planets orbiting #{@star_name}:\n"
+    @planets.each do |planet|
+      list += "* #{planet.name}\n"
+    end
+    list += "\n"
+    return list
+   end
+
+  #the find_planet_by_name returns the correct instance of Planet
+  # Note: We can use planets, @planets, or self.planets
+   def find_my_planet_by_name(found)#.downcase
+   found_planet = planets.find do |planet|
+     planet.name.upcase == found.upcase
+   end
+   return found_planet
+
+  end
+
+end