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<link rel="stylesheet" href="../coverage.css"/> <title> the_great_game/time.clj </title>
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<span class="covered" title="1 out of 1 forms covered">
001 (ns the-great-game.time
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002 (:require [clojure.string :as s]))
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003
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004 (def game-start-time
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005 "The start time of this run."
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006 (System/currentTimeMillis))
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007
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008 (def ^:const game-day-length
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009 "The Java clock advances in milliseconds, which is fine.
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010 But we need game-days to be shorter than real world days.
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011 A Witcher 3 game day is 1 hour 36 minutes, or 96 minutes, which is
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012 presumably researched. Round it up to 100 minutes for easier
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013 calculation."
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014 (* 100 ;; minutes per game day
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015 60 ;; seconds per minute
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016 1000)) ;; milliseconds per second
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017
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018 (defn now
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019 "For now, we'll use Java timestamp for time; ultimately, we need a
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020 concept of game-time which allows us to drive day/night cycle, seasons,
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021 et cetera, but what matters about time is that it is a value which
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022 increases."
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023 []
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024 (System/currentTimeMillis))
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025
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026 (def ^:const canonical-ordering-of-houses
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027 "The canonical ordering of religious houses."
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028 [:eye
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029 :foot
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030 :nose
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031 :hand
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032 :ear
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033 :mouth
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034 :stomach
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035 :furrow
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036 :plough])
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037
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038 (def ^:const days-of-week
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039 "The eight-day week of the game world. This differs from the canonical
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040 ordering of houses in that it omits the eye."
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041 (rest canonical-ordering-of-houses))
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042
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043 (def ^:const days-in-week
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044 "This world has an eight day week."
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045 (count days-of-week))
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046
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047 (def ^:const seasons-of-year
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048 "The ordering of seasons in the year is different from the canonical
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049 ordering of the houses, for reasons of the agricultural cycle."
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050 [:foot
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051 :nose
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052 :hand
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053 :ear
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054 :mouth
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055 :stomach
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056 :plough
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057 :furrow
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058 :eye])
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059
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060 (def ^:const seasons-in-year
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061 "Nine seasons in a year, one for each house (although the order is
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062 different."
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063 (count seasons-of-year))
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064
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065 (def ^:const weeks-of-season
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066 "To fit nine seasons of eight day weeks into 365 days, each must be of
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067 five weeks."
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068 [:first :second :third :fourth :fifth])
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069
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070 (def ^:const weeks-in-season
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071 "To fit nine seasons of eight day weeks into 365 days, each must be of
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072 five weeks."
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073 (count weeks-of-season))
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074
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075 (def ^:const days-in-season
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076 (* weeks-in-season days-in-week))
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077
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078 (defn game-time
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079 "With no arguments, the current game time. If a Java `timestamp` value is
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080 passed (as a `long`), the game time represented by that value."
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081 ([] (game-time (now)))
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082 ([timestamp]
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083 (- timestamp game-start-time)))
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084
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085 (defmacro day-of-year
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086 "The day of the year represented by this `game-time`, ignoring leap years."
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087 [game-time]
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088 `(mod (long (/ ~game-time game-day-length)) 365))
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089
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090 (def waiting-day?
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091 "Does this `game-time` represent a waiting day?"
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092 (memoize
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093 ;; we're likely to call this several times in quick succession on the
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094 ;; same timestamp
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095 (fn [game-time]
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096 (>=
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097 (day-of-year game-time)
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098 (* seasons-in-year weeks-in-season days-in-week)))))
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099
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100 (defn day
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101 "Day of the eight-day week represented by this `game-time`."
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102 [game-time]
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103 (let [day-of-week (mod (day-of-year game-time) days-in-week)]
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104 (if (waiting-day? game-time)
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105 (nth weeks-of-season day-of-week)
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106 (nth days-of-week day-of-week))))
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107
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108 (defn week
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109 "Week of season represented by this `game-time`."
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110 [game-time]
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111 (let [day-of-season (mod (day-of-year game-time) days-in-season)
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112 week (/ day-of-season days-in-week)]
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113 (if (waiting-day? game-time)
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114 :waiting
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115 (nth weeks-of-season week))))
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116
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117 (defn season
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118 [game-time]
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119 (let [season (int (/ (day-of-year game-time) days-in-season))]
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120 (if (waiting-day? game-time)
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121 :waiting
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122 (nth seasons-of-year season))))
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123
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124 (defn date-string
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125 "Return a correctly formatted date for this `game-time` in the calendar of
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126 the Great Place."
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127 [game-time]
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128 (s/join
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129 " "
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130 (if
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131 (waiting-day? game-time)
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132 [(s/capitalize
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133 (name
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134 (nth
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135 weeks-of-season
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136 (mod (day-of-year game-time) days-in-week))))
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137 "waiting day"]
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138 [(s/capitalize (name (week game-time)))
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139 (s/capitalize (name (day game-time)))
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140 "of the"
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141 (s/capitalize (name (season game-time)))])))
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142
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143
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144
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