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(;module:
lux
(lux (control eq
order)
(type model)))
(model: #export Duration
{#;doc "Durations have a resolution of milliseconds."}
Int
(def: #export from-millis
(-> Int Duration)
(|>. @model))
(def: #export to-millis
(-> Duration Int)
(|>. @repr))
(do-template [<name> <op>]
[(def: #export (<name> param subject)
(-> Duration Duration Duration)
(@model (<op> (@repr param) (@repr subject))))]
[merge i.+]
[frame i.%]
)
(def: #export (scale scalar duration)
(-> Int Duration Duration)
(@model (i.* scalar (@repr duration))))
(def: #export (query param subject)
(-> Duration Duration Int)
(i./ (@repr param) (@repr subject)))
(struct: #export _ (Eq Duration)
(def: (= param subject)
(i.= (@repr param) (@repr subject))))
(struct: #export _ (Order Duration)
(def: eq Eq<Duration>)
(do-template [<name> <op>]
[(def: (<name> param subject)
(<op> (@repr param) (@repr subject)))]
[< i.<]
[<= i.<=]
[> i.>]
[>= i.>=]
))
(do-template [<name> <op>]
[(def: #export (<name> duration)
(-> Duration Bool)
(<op> 0 (@repr duration)))]
[positive? i.>]
[negative? i.<]
[neutral? i.=])
)
(def: #export empty Duration (from-millis 0))
(def: #export milli Duration (from-millis 1))
(def: #export second Duration (from-millis 1_000))
(def: #export minute Duration (scale 60 second))
(def: #export hour Duration (scale 60 minute))
(def: #export day Duration (scale 24 hour))
(def: #export week Duration (scale 7 day))
(def: #export normal-year Duration (scale 365 day))
(def: #export leap-year Duration (merge day normal-year))
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