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Maybe/lib/money/arithmetic.rb
Zach Gollwitzer d75be2282b
New Design System + Codebase Refresh (#1823)
Since the very first 0.1.0-alpha.1 release, we've been moving quickly to add new features to the Maybe app. In doing so, some parts of the codebase have become outdated, unnecessary, or overly-complex as a natural result of this feature prioritization.

Now that "core" Maybe is complete, we're moving into a second phase of development where we'll be working hard to improve the accuracy of existing features and build additional features on top of "core". This PR is a quick overhaul of the existing codebase aimed to:

- Establish the brand new and simplified dashboard view (pictured above)
- Establish and move towards the conventions introduced in Cursor rules and project design overview #1788
- Consolidate layouts and improve the performance of layout queries
- Organize the core models of the Maybe domain (i.e. Account::Entry, Account::Transaction, etc.) and break out specific traits of each model into dedicated concerns for better readability
- Remove stale / dead code from codebase
- Remove overly complex code paths in favor of simpler ones
2025-02-21 11:57:59 -05:00

66 lines
1.4 KiB
Ruby

module Money::Arithmetic
CoercedNumeric = Struct.new(:value)
def +(other)
if other.is_a?(Money)
self.class.new(amount + other.amount, currency)
else
value = other.is_a?(CoercedNumeric) ? other.value : other
self.class.new(amount + value, currency)
end
end
def -(other)
if other.is_a?(Money)
self.class.new(amount - other.amount, currency)
else
value = other.is_a?(CoercedNumeric) ? other.value : other
self.class.new(amount - value, currency)
end
end
def -@
self.class.new(-amount, currency)
end
def *(other)
raise TypeError, "Can't multiply Money by Money, use Numeric instead" if other.is_a?(self.class)
value = other.is_a?(CoercedNumeric) ? other.value : other
self.class.new(amount * value, currency)
end
def /(other)
if other.is_a?(self.class)
amount / other.amount
else
raise TypeError, "can't divide Numeric by Money" if other.is_a?(CoercedNumeric)
self.class.new(amount / other, currency)
end
end
def abs
self.class.new(amount.abs, currency)
end
def zero?
amount.zero?
end
def negative?
amount.negative?
end
def positive?
amount.positive?
end
def to_f
amount.to_f
end
# Override Ruby's coerce method so the order of operands doesn't matter
# Wrap in Coerced so we can distinguish between Money and other types
def coerce(other)
[ self, CoercedNumeric.new(other) ]
end
end