Class: Gemwarrior::Evaluator

Inherits:
Object
  • Object
show all
Defined in:
lib/gemwarrior/evaluator.rb

Constant Summary collapse

PROGRAM_NAME =

CONSTANTS MESSAGES

'Gem Warrior'
QUIT_MESSAGE = 
'Thanks for playing the game. Until next time...'.colorize(:yellow)
RESUME_MESSAGE = 
'Back to adventuring!'.colorize(:green)
SEPARATOR = 
'=========================================================================='
GO_PARAMS = 
'Options: north, east, south, west'
CHANGE_PARAMS = 
'Options: name'
LIST_PARAMS = 
'Options: monsters, items, locations'
DEBUG_PARAMS = 
'Options: vars, map, stat'
DEBUG_STAT_PARAMS = 
'Options: atk_lo, atk_hi, strength, dexterity'
ERROR_COMMAND_INVALID =

ERRORS

'That is not something the game yet understands.'
ERROR_GO_PARAM_MISSING = 
'Just wander aimlessly? A direction would be nice.'
ERROR_GO_PARAM_INVALID = 
'The place in that direction is far, far, FAR too dangerous. You should try a different way.'
ERROR_ATTACK_PARAM_MISSING = 
'You cannot just "attack". You gotta choose something to attack.'
ERROR_ATTACK_PARAM_INVALID = 
'That monster does not exist here or can\'t be attacked.'
ERROR_TAKE_PARAM_MISSING = 
'You cannot just "take". You gotta choose something to take.'
ERROR_DROP_PARAM_MISSING = 
'You cannot just "drop". You gotta choose something to drop.'
ERROR_EQUIP_PARAM_MISSING = 
'You cannot just "equip". You gotta choose something to equip.'
ERROR_UNEQUIP_PARAM_MISSING = 
'You cannot just "unequip". You gotta choose something to unequip.'
ERROR_CHANGE_PARAM_MISSING = 
'You cannot just "change". You gotta choose something to change.'
ERROR_CHANGE_PARAM_INVALID = 
'You cannot change that...yet.'
ERROR_LIST_PARAM_MISSING = 
'You cannot just "list". You gotta choose something to list.'
ERROR_LIST_PARAM_INVALID = 
'You cannot list that...yet.'
ERROR_DEBUG_PARAM_MISSING = 
'You cannot just "debug". You gotta choose a debug command.'
ERROR_DEBUG_PARAM_INVALID = 
'You cannot debug that...yet.'
ERROR_DEBUG_STAT_PARAM_MISSING = 
'You cannot just "change stats". You gotta choose a stat to change.'
ERROR_DEBUG_STAT_PARAM_INVALID = 
'You cannot change that stat...yet.'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(world) ⇒ Evaluator

Returns a new instance of Evaluator.



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# File 'lib/gemwarrior/evaluator.rb', line 43

def initialize(world)
  self.world = world
  self.devcmds = %w(debug)
  self.devaliases = %w(db)
  self.commands = %w(character inventory list rest look take drop equip unequip go attack change help quit quit!)
  self.aliases = %w(c i ls r l t d e ue g a ch h q qq)
  self.descriptions = [
    'Display character information',
    'Look in your inventory',
    'List all the objects of a type that exist in the world',
    'Take a load off and regain HP',
    'Look around your current location',
    'Take item',
    'Drop item',
    'Equip item',
    'Unequip item',
    'Go in a direction',
    'Attack a monster',
    'Change something',
    'This help menu',
    'Quit w/ confirmation (also exit/x)',
    'Quit w/o confirmation (also exit!/xx)'
  ]
end

Instance Attribute Details

#aliases ⇒ Object

Returns the value of attribute aliases.



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# File 'lib/gemwarrior/evaluator.rb', line 41

def aliases
  @aliases
end

#commands ⇒ Object

Returns the value of attribute commands.



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# File 'lib/gemwarrior/evaluator.rb', line 41

def commands
  @commands
end

#descriptions ⇒ Object

Returns the value of attribute descriptions.



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# File 'lib/gemwarrior/evaluator.rb', line 41

def descriptions
  @descriptions
end

#devaliases ⇒ Object

Returns the value of attribute devaliases.



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# File 'lib/gemwarrior/evaluator.rb', line 41

def devaliases
  @devaliases
end

#devcmds ⇒ Object

Returns the value of attribute devcmds.



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# File 'lib/gemwarrior/evaluator.rb', line 41

def devcmds
  @devcmds
end

#world ⇒ Object

Returns the value of attribute world.



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# File 'lib/gemwarrior/evaluator.rb', line 41

def world
  @world
end

Instance Method Details

#evaluate(input) ⇒ Object 



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# File 'lib/gemwarrior/evaluator.rb', line 68

def evaluate(input)
  case input
  # Ctrl-D or empty command
  when nil, ""
    return
  # real command
  else
    tokens = input.split
    unless input_valid?(input)
      return ERROR_COMMAND_INVALID
    end
  end

  command = tokens.first.downcase
  param1 = tokens[1]
  param2 = tokens[2]
  param3 = tokens[3]

  case command
  # dev commands
  when 'debug', 'db'
    if param1.nil?
      puts ERROR_DEBUG_PARAM_MISSING
      DEBUG_PARAMS
    else
      case param1
      when 'vars', 'v'
        world.print_all_vars
      when 'godmode', 'iddqd', 'god', 'g'
        world.player.god_mode = !world.player.god_mode
      when 'beastmode', 'beast', 'b'
        world.player.beast_mode = !world.player.beast_mode
      when 'map', 'm'
        world.print_map
      when 'stat'
        if param2.nil?
          puts ERROR_DEBUG_STAT_PARAM_MISSING
          DEBUG_STAT_PARAMS
        else
          case param2
          when 'atk_lo'
            unless param3.nil?
              param3 = param3.to_i
              if param3.is_a? Numeric
                if param3 >= 0
                  world.player.atk_lo = param3
                end
              end
            end
          when 'atk_hi'
            unless param3.nil?
              param3 = param3.to_i
              if param3.is_a? Numeric
                if param3 >= 0
                  world.player.atk_hi = param3
                end
              end
            end
          when 'strength', 'str', 'st'
            unless param3.nil?
              param3 = param3.to_i
              if param3.is_a? Numeric
                if param3 >= 0
                  world.player.atk_lo = param3
                  world.player.atk_hi = param3
                end
              end
            end
          when 'dexterity', 'dex', 'd'
            unless param3.nil?
              param3 = param3.to_i
              if param3.is_a? Numeric
                if param3 >= 0
                  world.player.dexterity = param3
                end
              end
            end
          else
            ERROR_DEBUG_STAT_PARAM_INVALID
          end
        end
      else
        ERROR_DEBUG_PARAM_INVALID
      end
    end
  # normal commands
  when 'character', 'c'
    world.player.check_self
  when 'inventory', 'i'
    if param1
      world.player.inventory.describe_item(param1)
    else
      world.player.list_inventory
    end
  when 'list', 'ls'
    if param1.nil?
      puts ERROR_LIST_PARAM_MISSING
      LIST_PARAMS
    else
      world.list(param1)
    end
  when 'rest', 'r'
    world.player.rest
  when 'look', 'l'
    if param1
      world.describe_entity(world.location_by_coords(world.player.cur_coords), param1)
    else
      world.describe(world.location_by_coords(world.player.cur_coords))
    end
  when 'take', 't'
    if param1.nil?
      ERROR_TAKE_PARAM_MISSING
    else
      world.player.inventory.add_item(world.location_by_coords(world.player.cur_coords), param1)
    end
  when 'drop', 'd'
    if param1.nil?
      ERROR_DROP_PARAM_MISSING
    else
      world.player.inventory.remove_item(param1)
    end  
  when 'equip', 'e'
    if param1.nil?
      ERROR_EQUIP_PARAM_MISSING
    else
      world.player.inventory.equip_item(param1)
    end
  when 'unequip', 'ue'
    if param1.nil?
      ERROR_UNEQUIP_PARAM_MISSING
    else
      world.player.inventory.unequip_item(param1)
    end
  when 'go', 'g'
    if param1.nil?
      puts ERROR_GO_PARAM_MISSING
      GO_PARAMS
    else
      direction = param1
      if world.can_move?(direction)
        world.player.go(world.locations, param1)
        world.location_by_coords(world.player.cur_coords).checked_for_monsters = false
        world.describe(world.location_by_coords(world.player.cur_coords))
      else
        ERROR_GO_PARAM_INVALID
      end
    end
  when 'attack', 'a'
    if param1.nil?
      ERROR_ATTACK_PARAM_MISSING
    else
      monster_name = param1
      if world.has_monster_to_attack?(monster_name)
        monster = world.location_by_coords(world.player.cur_coords).monster_by_name(monster_name)
        world.player.attack(world, monster)
      else
        ERROR_ATTACK_PARAM_INVALID
      end
    end
  when 'change', 'ch'
    if param1.nil?
      puts ERROR_CHANGE_PARAM_MISSING
      CHANGE_PARAMS
    else
      case param1
      when 'name'
        world.player.modify_name
      else
        ERROR_CHANGE_PARAM_INVALID
      end
    end
  when 'help', 'h'
    list_commands
  when 'quit', 'exit', 'q', 'x'
    puts "You sure you want to quit? (y/n): "
    response = gets.chomp.downcase
    if (response.eql?("y") || response.eql?("yes"))
      puts QUIT_MESSAGE
      exit(0)
    else
      puts RESUME_MESSAGE
    end
  when 'quit!', 'exit!', 'qq', 'xx'
    puts QUIT_MESSAGE
    exit(0)
  else
    return
  end
end