Class: CryptoMarket::Currencies

Inherits:
Object
  • Object
show all
Includes:
CryptoMarket
Defined in:
lib/crypto_market/currencies.rb

Overview

Crypto Currencies is having many Crypto Coins

Constant Summary

Constants included from CryptoMarket

VERSION

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from CryptoMarket

#terminal_table

Constructor Details

#initialize ⇒ Currencies

Store all the currencies in an Array



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# File 'lib/crypto_market/currencies.rb', line 7

def initialize
  @api_data = CryptoMarket::Api.fetch_coin_data
  @coins = []
end

Instance Attribute Details

#coins ⇒ Object

Returns the value of attribute coins.



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# File 'lib/crypto_market/currencies.rb', line 5

def coins
  @coins
end

Instance Method Details

#coin_names_arrays ⇒ Object

Returns smaller Arrays with coin names and indexes



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# File 'lib/crypto_market/currencies.rb', line 84

def coin_names_arrays
  coins.map.with_index do |coin, index|
    "#{index + 1} #{coin.name}"
  end.each_slice(coins.size / 6)
end

#create_coin(coin) ⇒ Object

Instantiates a new Coin based on hash that gets passed in and set it’s attributes



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# File 'lib/crypto_market/currencies.rb', line 18

def create_coin(coin)
  name = coin['name']
  price_usd = coin['price_usd']
  price_btc = coin['price_btc']
  market_cap_usd = coin['market_cap_usd']
  percent_change_24h = coin['percent_change_24h']
  last_updated_unix = coin['last_updated']
  CryptoMarket::Coin.new(name, price_usd, price_btc, market_cap_usd,
                         percent_change_24h, last_updated_unix).tap do |new_coin|
    coins << new_coin
  end
end

#create_coins_from_attributes ⇒ Object

Call the create_coin method for each Coin hash



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# File 'lib/crypto_market/currencies.rb', line 32

def create_coins_from_attributes
  @api_data.each do |coin|
    create_coin(coin)
  end
end

#find_by_number(input) ⇒ Object

Returns an instance of Coin for the specific Coin that user is looking for



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# File 'lib/crypto_market/currencies.rb', line 39

def find_by_number(input)
  coins[input - 1]
end

#print_coin_names ⇒ Object

To be able to print out coin names in batches In order for next/break to work I need to keep interactions in this method



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# File 'lib/crypto_market/currencies.rb', line 92

def print_coin_names
  coin_names_arrays.each do |coin|
    coin.each do |name|
      index = name.slice!(/\d+\s/).strip
      table = terminal_table do |t|
        t.add_row [index, name]
        t.style = { all_separators: true, width: 60 }
      end
      puts table
    end
    table = terminal_table do |t|
      t.title = 'Select a number'
      t.add_row [1, 'To load more coins']
      t.add_row [2, 'To select a coin']
      t.style = { all_separators: true, width: 60 }
    end
    puts table
    input = nil
    until input == 1 || input == 2
      input = gets.strip.to_i
      puts 'Enter a correct number from the list' unless input == 1 || input == 2
    end
    if input == 1
      next
    elsif input == 2
      break
    end
  end
end

#print_sorted_changes(input = nil) ⇒ Object

Prints out the change for all Coin objects with terminal-table gem



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# File 'lib/crypto_market/currencies.rb', line 73

def print_sorted_changes(input = nil)
  sort_by_change(input).each do |coin|
    table = terminal_table do |t|
      t.add_row [coin.name, "#{coin.percent_change_24h}%"]
      t.style = { all_separators: true, width: 60 }
    end
    puts table
  end
end

#print_sorted_prices ⇒ Object

Prints out the price for all Coin objects with terminal-table gem



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# File 'lib/crypto_market/currencies.rb', line 60

def print_sorted_prices
  sort_by_price_usd.each do |coin|
    unless coin.price_usd == 0
      table = terminal_table do |t|
        t.add_row [coin.name, "$#{coin.price_usd}"]
        t.style = { all_separators: true, width: 60 }
      end
      puts table
    end
  end
end

#run ⇒ Object

Instantiates new coins from Coin class with attributes specified from coin_attribues method



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# File 'lib/crypto_market/currencies.rb', line 13

def run
  create_coins_from_attributes
end

#sort_by_change(input) ⇒ Object

Return sorted Array based on user input (positive, negative or default)



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# File 'lib/crypto_market/currencies.rb', line 49

def sort_by_change(input)
  if input == 'positive'
    coins.select { |coin| coin.percent_change_24h.to_f > 0 }.sort_by { |coin| coin.percent_change_24h.to_f }.reverse
  elsif input == 'negative'
    coins.select { |coin| coin.percent_change_24h.to_f < 0 }.sort_by { |coin| coin.percent_change_24h.to_f }
  else
    coins.sort_by { |coin| coin.percent_change_24h.to_f }.reverse
  end
end

#sort_by_price_usd ⇒ Object

Ranks the coins from based on their USD price



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# File 'lib/crypto_market/currencies.rb', line 44

def sort_by_price_usd
  coins.sort_by { |coin| coin.price_usd }.reverse
end