Initial data commit

Task/Morse-code/UNIX-Shell/morse-code.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+# michaeltd	2019-11-29 https://github.com/michaeltd/dots/blob/master/dot.files/.bashrc.d/.var/morse.sh
+# https://en.wikipedia.org/wiki/Morse_code
+# International Morse Code
+# 1. Length of dot is 1 unit
+# 2. Length of dash is 3 units
+# 3. The space between parts of the same letter is 1 unit
+# 4. The space between letters is 3 units.
+# 5. The space between words is 7 units.
+################################################################################
+
+alpha2morse() {
+  local -A alpha_assoc=(    [A]='.-'    [B]='-...'   [C]='-.-.' [D]='-..' [E]='.' \
+    [F]='..-.'  [G]='--.'   [H]='....'  [I]='..'     [J]='.---' \
+    [K]='-.-'   [L]='.-..'  [M]='--'    [N]='-.'     [O]='---' \
+    [P]='.--.'  [Q]='--.-'  [R]='.-.'   [S]='...'    [T]='-' \
+    [U]='..-'   [V]='...-'  [W]='.--'   [X]='-..-'   [Y]='-.--' [Z]='--..' \
+    [0]='-----' [1]='.----' [2]='..---' [3]='...--'  [4]='....-' \
+    [5]='.....' [6]='-....' [7]='--...' [8]='----..' [9]='----.' )
+
+  if [[ "${#}" -lt "1" ]]; then
+     echo -ne "Usage: ${FUNCNAME[0]} arguments...\n \
+        ${FUNCNAME[0]} is an IMC transmitter. \n \
+        It'll transmit your messages to International Morse Code.\n" >&2
+     return 1
+  fi
+
+  while [[ -n "${1}" ]]; do
+        for (( i = 0; i < ${#1}; i++ )); do
+            local letter="${1:${i}:1}"
+            for (( y = 0; y < ${#alpha_assoc[${letter^^}]}; y++ )); do
+                case "${alpha_assoc[${letter^^}]:${y}:1}" in
+                     ".") echo -n "dot "; play -q -n -c2 synth .1 2> /dev/null || sleep .1 ;;
+                     "-") echo -n "dash "; play -q -n -c2 synth .3 2> /dev/null || sleep .3 ;;
+                esac
+                sleep .1
+            done
+            echo
+            sleep .3
+        done
+        echo
+        sleep .7
+        shift
+  done
+}
+
+if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
+   alpha2morse "${@}"
+fi