9ed0206d159a21ee43d66a065d647de438c2949b
[BK-2020-03.git] / 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";