added options

a5hk · Aug 1, 2019 · caa80f6 · caa80f6
1 parent cb35a51
commit caa80f6
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diff --git a/README.md b/README.md
@@ -4,7 +4,7 @@ Command line tool to convert Gregorian calendar dates to Persian calendar dates.
 # Getting Started
 Pipe Gregorian calendar dates in `YYYY-MM-DD` format to `to_persian_date` to get that date in Persian calendar.
 
-## example
+## examples
 If you have put `to_persian_date` somewhere in your path:
 ```shell
 echo "2019-07-26" | to_persian_date #1398-05-04
@@ -13,6 +13,14 @@ Or if it is not in your path:
 ```shell
 echo "2019-07-26" | /path/to/to_persian_date #1398-05-04
 ```
+To use a different output delimiter:
+```shell
+echo "2019-07-26" | to_persian_date -D / #1398/05/04
+```
+To use a different input delimiter:
+```shell
+echo "2019/07/26" | to_persian_date -d / #1398-05-04
+```
 
 # License
 This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details

diff --git a/to_persian_date b/to_persian_date
@@ -98,8 +98,8 @@ d2j() {
     if [[ $k -le 185 ]]; then
       local jm=$((1 + k / 31))
       local jd=$((k % 31 + 1))
-      local jmd=$(zero_pad_md $jm $jd)
-      echo "$jy-$jmd"
+
+      echo "$(format_output $jy $jm $jd)"
       return 0
     else
       k=$((k - 186))
@@ -115,26 +115,81 @@ d2j() {
 
   local jm=$((7 + k / 30))
   local jd=$((k % 30 + 1))
-  local jmd=$(zero_pad_md $jm $jd)
 
-  echo "$jy-$jmd"
+  echo "$(format_output $jy $jm $jd)"
 }
 
-zero_pad_md() {
-  local jm=$1
-  local jd=$2
+zero_pad() {
+  local num=$1
 
-  [[ $jm -lt 10 ]] && jm="0$jm"
-  [[ $jd -lt 10 ]] && jd="0$jd"
+  [[ $num -lt 10 ]] && num="0$num"
 
-  echo "$jm-$jd"
+  echo "$num"
 }
 
-read input_date
+format_output() {
+  local jy=$1
+  local jm=$(zero_pad $2)
+  local jd=$(zero_pad $3)
+  local odel=${OPTION_ODEL:--}
+
+  echo "$jy$odel$jm$odel$jd"
+}
+
+parse_input() {
+  local input_date=$1
+  local idel=${OPTION_IDEL:--}
+  local y=${input_date%%$idel*}
+  local m=${input_date%$idel*}
+  m=${m#*$idel}
+  local d=${input_date##*$idel}
+
+  echo "$((10#$y)) $((10#$m)) $((10#$d))"
+}
+
+print_help() {
+  echo "Usage: to_persian_date [d idelim] [D odelim]"
+  echo "  Convert Gregorian calendar date to Persian calendar date."
+  echo ""
+  echo "  Reads a Gregorian calendar date from standard input and prints "
+  echo "  its corresponding Persian calendar date to standard output."
+  echo ""
+  echo "  Options:"
+  echo "    -h          display this help and exit"
+  echo "    -d idelim   use IDELIM instead of - for date delimiter"
+  echo "    -D Odelim   use ODELIM instead of - for date delimiter"
+}
+
+main() {
+  local input_data
+
+  while getopts ":hd:D:" opt; do
+    case ${opt} in
+      h)
+        print_help
+        exit 0
+        ;;
+      d)
+        OPTION_IDEL=$OPTARG
+        ;;
+      D)
+        OPTION_ODEL=$OPTARG
+        ;;
+      \?)
+        echo "Invalid Option: -$OPTARG" 1>&2
+        exit 1
+        ;;
+      :)
+        echo "Invalid Option: -$OPTARG requires an argument" 1>&2
+        exit 1
+        ;;
+    esac
+  done
+  shift $((OPTIND -1))
+
+  read input_data
+  to_jalaali $(parse_input $input_data)
+}
 
-y=${input_date%%-*}
-m=${input_date%-*}
-m=${m#*-}
-d=${input_date##*-}
+main "$@"
 
-to_jalaali $y $m $d