// Min sets a new minimum balance. Returns true for success, false for incompatible unit
// or in case the min is more than the current balance.
func (h *Resource) Min(min us.Quantity) bool {
if !us.AreCompatible(h.balance, min) || us.More(min, h.balance) {
return false
}
h.min = min
return true
}
// Set the Resource to the given value. The value should be between the min
// and max of the Resource. Return true for success, false for incompatible unit
// or out of bounds.
func (h *Resource) Set(q us.Quantity) bool {
if !us.AreCompatible(h.balance, q) || h.outOfBounds(q) {
return false
}
h.balance = q
return true
}
// Max sets a new maximum balance. Returns true for success, false for incompatible unit
// or in case the max is less than the current balance.
func (h *Resource) Max(max us.Quantity) bool {
if !us.AreCompatible(h.balance, max) || us.Less(max, h.balance) {
return false
}
h.max = max
return true
}
// Withdraw subtracts the given amount from the Resource.
// Return true for success, false for incompatible unit or out of bounds
func (h *Resource) Withdraw(q us.Quantity) bool {
if !us.AreCompatible(h.balance, q) {
return false
}
n := us.Subtract(h.balance, q)
if h.outOfBounds(n) {
return false
}
h.balance = n
return true
}
// Deposit adds the Measurement to the Resource. Return true for success, false for
// incompatible unit or out of bounds.
func (h *Resource) Deposit(q us.Quantity) bool {
if !us.AreCompatible(h.balance, q) {
return false
}
n := us.Add(h.balance, q)
if h.outOfBounds(n) {
return false
}
h.balance = n
return true
}
// New creates a new Resource with the given minimum and maximum values.
// min should be less than max and the units should be compatible.
// The initial balance value is set to min. A Context name can be provided, or ""
// if no Context is required.
func New(min us.Quantity, max us.Quantity, c string) *Resource {
var ctx *context.Context
if c != "" {
ctx = context.Ctx(c)
} else {
ctx, _ = context.DefineContext("", min.Symbol(), us.DefaultFormat)
}
if us.AreCompatible(min, max) && us.Less(min, max) {
return &Resource{ctx.Convert(min), ctx.Convert(max), min, ctx}
}
return nil
}