| 1 | #!/bin/bash |
| 2 | |
| 3 | # Desc: Template to indicate time duration in ISO-8601 format |
| 4 | |
| 5 | yell() { echo "$0: $*" >&2; } # Yell, Die, Try Three-Fingered Claw technique; # Ref/Attrib: https://stackoverflow.com/a/25515370 |
| 6 | die() { yell "$*"; exit 111; } |
| 7 | try() { "$@" || die "cannot $*"; } |
| 8 | timeDuration(){ |
| 9 | # Desc: Output approximate time duration string before given time (default:current date) |
| 10 | # Ref/Attrib: ISO-8601:2004(E), §4.4.4.2 Representations of time intervals by duration and context information |
| 11 | # Note: "1 month" ("P1M") is assumed to be "30 days" (see ISO-8601:2004(E), §2.2.1.2) |
| 12 | # Usage: timeDuration [arg1] ([arg2]) |
| 13 | # Input: arg1: seconds as base 10 integer >= 0 (ex: 3601) |
| 14 | # arg2: precision level (optional; default=2) |
| 15 | # Output: stdout: ISO-8601 duration string (ex: "P1H1S", "P2Y10M15DT10H30M20S") |
| 16 | # Example: 'timeDuration 111111 3' yields 'P1DT6H51M' |
| 17 | # Depends: date 8 (gnucoreutils) |
| 18 | local returnState fullHours fullMinutes fullSeconds; |
| 19 | ARG1="$1"; |
| 20 | ARG2="$2"; |
| 21 | precision=2; # set default precision |
| 22 | returnState="true"; # set default return state |
| 23 | |
| 24 | # Check that between one and two arguments is supplied |
| 25 | if ! { [[ $# -ge 1 ]] && [[ $# -le 2 ]]; }; then |
| 26 | yell "ERROR:Invalid number of arguments:$# . Exiting."; |
| 27 | returnState="ERROR_INPUT"; fi |
| 28 | |
| 29 | # Check that arg1 provided |
| 30 | if [[ $# -ge 1 ]]; then |
| 31 | # Check that arg1 is a positive integer |
| 32 | if [[ "$ARG1" =~ ^[[:digit:]]+$ ]]; then |
| 33 | arg1Valid="true"; |
| 34 | else |
| 35 | yell "ERROR:ARG1 not a digit."; |
| 36 | returnState="ERROR_INPUT"; |
| 37 | arg1Valid="false"; |
| 38 | fi |
| 39 | else |
| 40 | yell "ERROR:No argument provided. Exiting."; |
| 41 | exit 1; |
| 42 | fi |
| 43 | |
| 44 | # Consider whether arg2 was provided |
| 45 | if [[ $# -eq 2 ]]; then |
| 46 | # Check that the second arg is a positive integer |
| 47 | if [[ "$ARG2" =~ ^[[:digit:]]+$ ]] && [[ "ARG2" -gt 0 ]]; then |
| 48 | arg2Valid="true"; |
| 49 | precision="$ARG2"; |
| 50 | else |
| 51 | yell "ERROR:ARG2 not a positive integer. (is $ARG2 ). Leaving early."; |
| 52 | returnState="ERROR_INPUT"; |
| 53 | arg2Valid="false"; |
| 54 | fi; |
| 55 | else |
| 56 | arg2Valid="false"; |
| 57 | fi; |
| 58 | |
| 59 | remainder="$ARG1" ; # seconds |
| 60 | ## Calculate full years Y, update remainder |
| 61 | fullYears=$(( remainder / (365*24*60*60) )); |
| 62 | remainder=$(( remainder - (fullYears*365*24*60*60) )); |
| 63 | ## Calculate full months M, update remainder |
| 64 | fullMonths=$(( remainder / (30*24*60*60) )); |
| 65 | remainder=$(( remainder - (fullMonths*30*24*60*60) )); |
| 66 | ## Calculate full days D, update remainder |
| 67 | fullDays=$(( remainder / (24*60*60) )); |
| 68 | remainder=$(( remainder - (fullDays*24*60*60) )); |
| 69 | ## Calculate full hours H, update remainder |
| 70 | fullHours=$(( remainder / (60*60) )); |
| 71 | remainder=$(( remainder - (fullHours*60*60) )); |
| 72 | ## Calculate full minutes M, update remainder |
| 73 | fullMinutes=$(( remainder / (60) )); |
| 74 | remainder=$(( remainder - (fullMinutes*60) )); |
| 75 | ## Calculate full seconds S, update remainder |
| 76 | fullSeconds=$(( remainder / (1) )); |
| 77 | remainder=$(( remainder - (remainder*1) )); |
| 78 | ## Check which fields filled |
| 79 | if [[ $fullYears -gt 0 ]]; then hasYears="true"; else hasYears="false"; fi |
| 80 | if [[ $fullMonths -gt 0 ]]; then hasMonths="true"; else hasMonths="false"; fi |
| 81 | if [[ $fullDays -gt 0 ]]; then hasDays="true"; else hasDays="false"; fi |
| 82 | if [[ $fullHours -gt 0 ]]; then hasHours="true"; else hasHours="false"; fi |
| 83 | if [[ $fullMinutes -gt 0 ]]; then hasMinutes="true"; else hasMinutes="false"; fi |
| 84 | if [[ $fullSeconds -gt 0 ]]; then hasSeconds="true"; else hasSeconds="false"; fi |
| 85 | |
| 86 | ## Determine which fields to display (see ISO-8601:2004 §4.4.3.2) |
| 87 | witherPrecision="false" |
| 88 | |
| 89 | ### Years |
| 90 | if $hasYears && [[ $precision -gt 0 ]]; then |
| 91 | displayYears="true"; |
| 92 | witherPrecision="true"; |
| 93 | else |
| 94 | displayYears="false"; |
| 95 | fi; |
| 96 | if $witherPrecision; then ((precision--)); fi; |
| 97 | |
| 98 | ### Months |
| 99 | if $hasMonths && [[ $precision -gt 0 ]]; then |
| 100 | displayMonths="true"; |
| 101 | witherPrecision="true"; |
| 102 | else |
| 103 | displayMonths="false"; |
| 104 | fi; |
| 105 | if $witherPrecision && [[ $precision -gt 0 ]]; then |
| 106 | displayMonths="true"; |
| 107 | fi; |
| 108 | if $witherPrecision; then ((precision--)); fi; |
| 109 | |
| 110 | ### Days |
| 111 | if $hasDays && [[ $precision -gt 0 ]]; then |
| 112 | displayDays="true"; |
| 113 | witherPrecision="true"; |
| 114 | else |
| 115 | displayDays="false"; |
| 116 | fi; |
| 117 | if $witherPrecision && [[ $precision -gt 0 ]]; then |
| 118 | displayDays="true"; |
| 119 | fi; |
| 120 | if $witherPrecision; then ((precision--)); fi; |
| 121 | |
| 122 | ### Hours |
| 123 | if $hasHours && [[ $precision -gt 0 ]]; then |
| 124 | displayHours="true"; |
| 125 | witherPrecision="true"; |
| 126 | else |
| 127 | displayHours="false"; |
| 128 | fi; |
| 129 | if $witherPrecision && [[ $precision -gt 0 ]]; then |
| 130 | displayHours="true"; |
| 131 | fi; |
| 132 | if $witherPrecision; then ((precision--)); fi; |
| 133 | |
| 134 | ### Minutes |
| 135 | if $hasMinutes && [[ $precision -gt 0 ]]; then |
| 136 | displayMinutes="true"; |
| 137 | witherPrecision="true"; |
| 138 | else |
| 139 | displayMinutes="false"; |
| 140 | fi; |
| 141 | if $witherPrecision && [[ $precision -gt 0 ]]; then |
| 142 | displayMinutes="true"; |
| 143 | fi; |
| 144 | if $witherPrecision; then ((precision--)); fi; |
| 145 | |
| 146 | ### Seconds |
| 147 | |
| 148 | if $hasSeconds && [[ $precision -gt 0 ]]; then |
| 149 | displaySeconds="true"; |
| 150 | witherPrecision="true"; |
| 151 | else |
| 152 | displaySeconds="false"; |
| 153 | fi; |
| 154 | if $witherPrecision && [[ $precision -gt 0 ]]; then |
| 155 | displaySeconds="true"; |
| 156 | fi; |
| 157 | if $witherPrecision; then ((precision--)); fi; |
| 158 | |
| 159 | |
| 160 | |
| 161 | ## Determine whether or not the "T" separator is needed to separate date and time elements |
| 162 | if ( $displayHours || $displayMinutes || $displaySeconds); then |
| 163 | displayDateTime="true"; else displayDateTime="false"; fi |
| 164 | |
| 165 | ## Construct duration output string |
| 166 | OUTPUT="P" |
| 167 | if $displayYears; then |
| 168 | OUTPUT=$OUTPUT$fullYears"Y"; fi |
| 169 | if $displayMonths; then |
| 170 | OUTPUT=$OUTPUT$fullMonths"M"; fi |
| 171 | if $displayDays; then |
| 172 | OUTPUT=$OUTPUT$fullDays"D"; fi |
| 173 | if $displayDateTime; then |
| 174 | OUTPUT=$OUTPUT"T"; fi |
| 175 | if $displayHours; then |
| 176 | OUTPUT=$OUTPUT$fullHours"H"; fi |
| 177 | if $displayMinutes; then |
| 178 | OUTPUT=$OUTPUT$fullMinutes"M"; fi |
| 179 | if $displaySeconds; then |
| 180 | OUTPUT=$OUTPUT$fullSeconds"S"; fi |
| 181 | |
| 182 | ## Output duration string to stdout |
| 183 | if [[ "$returnState" = "true" ]]; then echo "$OUTPUT"; fi |
| 184 | |
| 185 | #===Determine function return code=== |
| 186 | if [ "$returnState" = "true" ]; then |
| 187 | return 0; |
| 188 | else |
| 189 | echo "$returnState" 1>&2; |
| 190 | return 1; |
| 191 | fi |
| 192 | |
| 193 | } # Get duration (ex: PT10M4S ) |
| 194 | |
| 195 | #==BEGIN sample code== |
| 196 | echo "Precision 6 duration:$(timeDuration "$(date +%s)" 6)" |
| 197 | echo "Precision 5 duration:$(timeDuration "$(date +%s)" 5)" |
| 198 | echo "Precision 4 duration:$(timeDuration "$(date +%s)" 4)" |
| 199 | echo "Precision 3 duration:$(timeDuration "$(date +%s)" 3)" |
| 200 | echo "Precision 2 duration:$(timeDuration "$(date +%s)" 2)" |
| 201 | echo "Precision 1 duration:$(timeDuration "$(date +%s)" 1)" |
| 202 | echo "Precision 6 duration:$(timeDuration $((60+60*60+60*60*24+60*60*24*30+60*60*24*365 - (60+60*60+60*60*24+60*60*24*30) )) 6)" |
| 203 | timeDuration "$@" |
| 204 | #==END sample code== |
| 205 | |
| 206 | # Author: Steven Baltakatei Sandoval |
| 207 | # License: GPLv3+ |