feat(user/):Add wikicode script to make journal year month summary

	new file:   user/mw_create_summary_months.sh

diff --git a/user/mw_create_summary_months.sh b/user/mw_create_summary_months.sh
new file mode 100755 (executable)
index 0000000..ca5dfe5
--- /dev/null
+++ b/user/mw_create_summary_months.sh
@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+# Desc: Prints mediawiki code for a summary of months of a year on the bk4 wiki.
+# Usage: /bin/bash mw_create_summary_months.sh [int year]
+# Input: arg1: year
+# Example: /bin/bash mw_create_summary_months.sh [int year] > output.txt
+# Version: 0.0.1
+
+yell() { echo "$0: $*" >&2; } # print script path and all args to stderr
+die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status
+must() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails
+main() {
+    yyyy="$1";
+    
+    # Check input
+    if [[ $# -ne 1 ]]; then die "FATAL:Invalid arg count:$#"; fi;
+    ## Strip leading zeroes (because August/octal)
+    yyyy="$((10#${yyyy}))";
+    ## Check year
+    re="[0-9]+";
+    if [[ ! $yyyy =~ $re ]]; then die "FATAL:Invalid year string:$yyyy"; fi;
+    if [[ ! $yyyy -ge 1582 ]]; then die "FATAL:Invalid year string:$yyyy"; fi;
+
+    # Calc working vars
+    ## Years
+    yyyy_prev="$((yyyy - 1))";
+    yyyy_next="$((yyyy + 1))";
+
+    # Form and print header
+    printf "{{bk journal header}}\n";
+    printf "A summary of monthly journals of [[%d]]. " "$yyyy";
+    printf "Preceded by [[Summary of months of %d]]. " "$yyyy_prev";
+    printf "Followed by [[Summary of months of %d]]. " "$yyyy_next";
+    printf "\n\n";
+
+    # Form and print body
+    for (( mm=1; mm <= 12; mm++)); do
+        printf "=[[%4d-%02d]]=" "$yyyy" "$mm";
+        printf "\n";
+        printf "{{:%4d-%02d}}" "$yyyy" "$mm";
+        printf "\n";
+        
+    done;
+    printf "\n\n";
+
+    # Form and print footer
+    printf "{{bk journal footer}}\n";
+    s1="[[Category:Monthly summaries by year]]"
+    printf "%s\n" "$s1";
+    printf "\n";
+    
+}; # main program
+
+main "$@";
+
+# Author: Steven Baltakatei Sandoval
+#+License: GPLv3+