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time.clj
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time.clj
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(ns
^{:doc "Random utilities, date and time functions."
:author "Paweł Wilk"
:added "1.0.0"}
io.randomseed.utils.time
(:import [java.time Instant Duration ZoneRegion]
[java.util Date Calendar])
(:require [tick.core :as t]
[tick.protocols :as tp]
[io.randomseed.utils :refer :all]))
(defn- parse-ts-core
[s multiply?]
(when (valuable? s)
(if (t/instant? s) s
(if (inst? s)
(t/instant s)
(t/instant (if multiply?
(* 1000 (parse-long s))
(parse-long s)))))))
(defn parse-ts
[s]
(parse-ts-core s false))
(defn parse-ts-secs
[s]
(parse-ts-core s true))
(defn safe-parse-ts
[s]
(try (parse-ts-core s false)
(catch Throwable e nil)))
(defn safe-parse-ts-secs
[s]
(try (parse-ts-core s true)
(catch Throwable e nil)))
(def date-time-rpat #"(\d\d\d\d[\.\-\/]\d\d[\.\-\/]\d\d)\s(\d\d:\d\d:\d\d(\.\d{2,4})?)")
(def tstamp-pat #"\d{10,17}")
(defn- parse-dt-core
[s multiply?]
(when (valuable? s)
(if (inst? s)
(t/instant s)
(if (number? s)
(parse-ts-core s multiply?)
(if (string? s)
(let [[_ d t] (re-find date-time-rpat s)]
(if (and d t)
(tp/parse (str d "T" t))
(if-let [t (re-find tstamp-pat s)]
(parse-ts-core t multiply?)
(tp/parse s))))
(tp/parse (str s)))))))
(defn parse-dt
[s]
(parse-dt-core s false))
(defn parse-dt-secs
[s]
(parse-dt-core s true))
(defn safe-parse-dt
[s]
(try (parse-dt-core s false)
(catch Throwable e nil)))
(defn safe-parse-dt-secs
[s]
(try (parse-dt-core s true)
(catch Throwable e nil)))
(defn timestamp
([] (.toEpochMilli (t/now)))
([t]
(when (valuable? t)
(let [t (parse-dt t)]
(if (instant? t)
(.toEpochMilli ^Instant t)
(.toEpochMilli ^Instant (t/instant t)))))))
(defn timestamp-secs
([] (long (/ (timestamp) 1000)))
([t] (when-some [t (timestamp t)] (long (/ t 1000)))))
(defn zero-duration?
^Boolean [^Duration d]
(.isZero ^Duration d))
(defn pos-duration?
^Boolean [^Duration d]
(not (or (.isNegative ^Duration d)
(.isZero ^Duration d))))
(defn neg-duration?
^Boolean [^Duration d]
(.isNegative ^Duration d))
(defn parse-dur-min
[v]
(when-some [v (parse-long v)]
(t/new-duration v :minutes)))
(def ^:const duration-map
{:yoctosecond :yoctoseconds
:zeptosecond :zeptoseconds
:attosecond :attoseconds
:femtosecond :femtoseconds
:picosecond :picos
:picoseconds :picos
:pico :picos
:nanosecond :nanos
:nanoseconds :nanos
:nano :nanos
:microsecond :micros
:microseconds :micros
:micro :micros
:millisecond :millis
:milliseconds :millis
:milli :millis
:centisecond :centiseconds
:decisecond :deciseconds
:second :seconds
:sec :seconds
:secs :seconds
:minute :minutes
:min :minutes
:mins :minutes
:quadrans :quadranses
:hour :hours
:day :days
:night :nights
:week :weeks
:weekend :weekends
:month :months
:quarter :quarters
:year :years
:century :centuries
:millenium :millenia
:era :eras
:eon :eons})
(defn parse-duration
"Parses time duration expressed as value and unit. For a single argument being a
single value it is treated as minutes. For a single value being a collection the
function is applied to consecutive values. For the given `d` and `default-unit` the
value of `d` is parsed as a long number and the unit is converted into a keyword
and should be one of the: `:day`, `:hour`, `:minute`, `:second`, `:millisecond`,
`:microsecond` or `:nanosecond` (including their corresponding plural forms). When
multiple arguments are given they are parsed in pairs and added to create a single
duration."
([d]
(parse-duration d :minutes))
([d default-unit]
(when d
(if (t/duration? d)
d
(if (map? d)
(let [t (or (:time d) (:duration d))
u (or (:unit d) (:units d))]
(if (and t u)
(parse-duration (cons u (cons t nil)))
(if (and (= (count d) 1) (number? (ffirst d)))
(parse-duration (first d))
(t/new-duration 0 (or default-unit :minutes)))))
(if (sequential? d)
(let [dunit (some-keyword default-unit)
dunit (or (get duration-map dunit dunit) :minutes)]
(->> (partition 2 2 '(nil) d)
(map (fn [d]
(let [unit (some-keyword (nth d 1))]
(t/new-duration (safe-parse-long (nth d 0 0) 0)
(or (and unit (get duration-map unit unit))
dunit)))))
(reduce t/+)))
(t/new-duration (safe-parse-long d 0)
(if-some [dunit (some-keyword default-unit)]
(get duration-map dunit dunit)
:minutes)))))))
([d default-unit & pairs]
(parse-duration (cons d (cons default-unit pairs)) :minutes)))
(def ^:const unit-to-efn
{:nanos t/nanos
:micros t/micros
:millis t/millis
:seconds t/seconds
:minutes t/minutes
:hours t/hours
:days t/days
:months t/months
:years t/years})
(defn time-unit
([v default-unit]
(time-unit v default-unit
(get unit-to-efn (get duration-map default-unit default-unit))))
([v default-unit extraction-fn]
(when v
(if (t/duration? v)
(extraction-fn v)
(if (number? v)
(safe-parse-long v)
(when-some [dur (parse-duration v (or default-unit :minutes))]
(extraction-fn dur)))))))
(defn millis
([v] (time-unit v :millis t/millis))
([v default] (or (time-unit v :millis t/millis) default)))
(def milliseconds millis)
(defn seconds
([v] (time-unit v :seconds t/seconds))
([v default] (or (time-unit v :seconds t/seconds) default)))
(defn minutes
([v] (time-unit v :minutes t/minutes))
([v default] (or (time-unit v :minutes t/minutes) default)))
(defn hours
([v] (time-unit v :hours t/hours))
([v default] (or (time-unit v :hours t/hours) default)))
(defn days
([v] (time-unit v :days t/days))
([v default] (or (time-unit v :days t/days) default)))
(def one-second
(t/new-duration 1 :seconds))
(defn add-second
[t]
(t/>> t one-second))
(defn sub-second
[t]
(t/<< t one-second))
(defn days-ago
"Returns a time of days ago from now."
[n]
(t/<< (t/now) (t/new-duration n :days)))
(defn duration->time
([duration] (duration->time duration (t/now)))
([duration t] (t/<< t duration)))
(defn time->duration
([t] (t/duration t))
([from-time to-time] (t/between (t/time from-time) (t/time to-time))))
(defn timeish?
[v]
(or (t/instant? v)
(t/time? v)
(t/date-time? v)))
(defn duration?
[v]
(t/duration? v))
(defn duration-or-time
([v]
(duration-or-time v nil))
([v t]
(when v
(if (t/duration? v)
[v (duration->time v (or t (t/now)))]
[(time->duration v (or t (t/now))) v]))))
(def utc (t/zone "UTC"))
(defn instant-utc
([] (instant-utc (t/now)))
([v]
(if (t/instant? v)
(t/date-time (.atZone ^Instant v ^ZoneRegion utc))
(if (inst? v)
(t/date-time (.atZone ^Instant (t/instant v) ^ZoneRegion utc))
(t/date-time (.atZone ^Instant (parse-dt v) ^ZoneRegion utc))))))
(defn local-utc-delta
[]
(.getTimeInMillis
(doto (Calendar/getInstance)
(.clear)
(.set 1970 Calendar/JANUARY 1 0 0 0))))
(defn local-utc
[t]
(t/instant (.getTime t)))
(defn utc-local
[t]
(t/inst (timestamp t)))
(defn utc-instant
([] (t/now))
([v]
(if (t/instant? v)
v
(if (inst? v)
(local-utc v)
(parse-dt v)))))
(defn try-times*
[times thunk]
(let [res (first (drop-while
exception?
(repeatedly times
#(try (thunk)
(catch Exception e
(do
(println "Exception:" (str e))
(Thread/sleep 5000)
e))))))]
(if (exception? res)
(throw res)
res)))
(defmacro try-times
"Executes body. If an exception is thrown, will retry. At most n retries are done. If
still some exception is thrown it is bubbled upwards in the call chain."
([& body]
(let [n (first body)]
(if (pos-int? n)
`(try-times* ~n (fn [] ~@(rest body)))
`(try-times* 25 (fn [] ~@body))))))