user/mw_create_month_journal.sh

   1 #!/usr/bin/env bash
   2 # Desc: Prints mediawiki code for a journal month in the bk4 wiki.
   3 # Usage: /bin/bash mw_create_month_journal.sh [int year] [int month]
   4 # Input: arg1: year
   5 #        arg2: month
   6 # Example: /bin/bash mw_create_month_journal.sh 2023 03 > output.txt
   7 # Version: 0.0.1
   8
   9 yyyy="$1";
  10 mm="$2";
  11
  12 yell() { echo "$0: $*" >&2; } # print script path and all args to stderr
  13 die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status
  14 must() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails
  15
  16 # Check input
  17 ## Check arg count
  18 if [[ $# -ne 2 ]]; then die "FATAL:Invalid arg count:$#"; fi;
  19 ## Strip leading zeros (because August/octal)
  20 yyyy="$((10#${yyyy}))";
  21 mm="$((10#${mm}))";
  22 ## Check year
  23 re="[0-9]+";
  24 if [[ ! $yyyy =~ $re ]]; then die "FATAL:Invalid year string:$yyyy"; fi;
  25 if [[ ! $yyyy -ge 1582 ]]; then die "FATAL:Invalid year string:$yyyy"; fi;
  26 ## Check month
  27 if [[ $mm -lt 1 ]] || [[ $mm -gt 12 ]]; then die "FATAL:Invalid month:$mm"; fi;
  28
  29
  30 # Calc working vars
  31 ## Years
  32 if [[ $mm -gt 1 ]]; then
  33     yyyy_prev="$yyyy";
  34 else
  35     yyyy_prev="$((yyyy - 1))";
  36 fi;
  37 if [[ $mm -lt 12 ]]; then
  38     yyyy_next="$yyyy";
  39 else
  40     yyyy_next="$((yyyy + 1))";
  41 fi;
  42 ## Months
  43 mm_prev="$((mm - 1))";
  44 mm_next="$((mm + 1))";
  45 if [[ $mm_prev -lt 1 ]]; then mm_prev="$((mm_prev + 12))"; fi;
  46 if [[ $mm_next -gt 12 ]]; then mm_next="$((mm_next - 12))"; fi;
  47 ## Leap Years
  48 if [[ ! $((yyyy % 4)) -eq 0 ]]; then
  49     ### Year is not evenly divisible by 4.
  50     leapyear="no";
  51 elif [[ ! $((yyyy % 100)) -eq 0 ]]; then
  52     ### Year is not evenly divisible by 100.
  53     leapyear="yes";
  54 elif [[ ! $((yyyy % 400)) -eq 0 ]]; then
  55     ### year is not evenly divisible by 400.
  56     leapyear="no";
  57 else
  58     ### year is divisible by 4, 100, and 400
  59     leapyear="yes";
  60 fi;
  61
  62 # Form and print header
  63 printf "Journal for [[%d]]-%02d. " "$yyyy" "$mm";
  64 printf "Preceded by [[%d-%02d]]. " "$yyyy_prev" "$mm_prev";
  65 printf "Followed by [[%d-%02d]]. " "$yyyy_next" "$mm_next";
  66 printf "\n\n";
  67
  68 printf "==Events==\n";
  69 printf "\n";
  70
  71 printf "==Tasks==\n";
  72 printf "\n";
  73
  74 # Form and print body
  75 for (( dd=1; dd <= 31; dd++ )); do
  76     if [[ $mm -eq 2 ]] && [[ $dd -eq 29 ]] && \
  77            [[ $leapyear == "no" ]]; then break; fi;
  78     if [[ $mm -eq 2 ]] && [[ $dd -ge 30 ]]; then break; fi;
  79     if [[ $mm -eq 4 ]] && [[ $dd -ge 31 ]]; then break; fi;
  80     if [[ $mm -eq 6 ]] && [[ $dd -ge 31 ]]; then break; fi;
  81     if [[ $mm -eq 9 ]] && [[ $dd -ge 31 ]]; then break; fi;
  82     if [[ $mm -eq 11 ]] && [[ $dd -ge 31 ]]; then break; fi;
  83     printf "==%4d-%02d-%02d==\n" "$yyyy" "$mm" "$dd";
  84     fs_iso8601_alt="+%G-W%V-%u, %Y-%j, %a"; # alternate ISO-8601 dates
  85     date_alt="$(date --date="$yyyy-$mm-$dd" "$fs_iso8601_alt")";
  86     printf "%s\n" "$date_alt";
  87     printf "\n";
  88 done;
  89 printf "\n";
  90
  91 # Form and print footer
  92 s1="==References==";
  93 s2="<references>";
  94 s3="</references>";
  95 printf "%s\n%s\n%s\n" "$s1" "$s2" "$s3";
  96 printf "\n";
  97
  98 printf "==See Also==\n";
  99 printf "\n";
 100
 101 printf "==Ext. Links==\n";
 102 printf "\n";
 103
 104 s1="[[Category:Journals by month]]";
 105 printf "%s\n" "$s1";
 106 printf "\n";