add rofi calendar

.config/rofi/scripts/calendar.sh

@@ -0,0 +1,96 @@
+#!/usr/bin/env bash
+DIR=$(dirname $PWD)
+
+current_day=$(date +"%e")
+current_month=$(date +"%m")
+current_year=$(date +"%Y")
+
+month=$(date +"%-m")
+year=$(date +"%Y")
+previous_month="◀"
+next_month="▶"
+last_selected_option=""
+
+format_calendar () {
+    echo "$1" \
+    | sed -E 's/([[:alpha:]])__/\1\n/g' \
+    | sed -E 's/___([[:digit:]])/.\n\1/g' \
+    | sed -e 's/___/\n./g' \
+    | sed -e 's/__/\n/g' \
+    | sed -e 's/_/\n/g'
+}
+
+print_month() {
+    calendar="$(cal -v -- $1 $2 | tail -n +2 | sed -e 's/ /_/g')"
+    echo "$(format_calendar "$calendar")"
+}
+
+find_day_index() {
+    index=0
+    while IFS=' ' read -ra arr; do
+        for i in "${arr[@]}"; do
+            if [[ "$i" == "$2" ]]; then
+                echo "$index"
+                break
+            fi
+            ((index++))
+        done
+    done <<< "$1"
+}
+
+calendar_menu() {
+    calendar_header=$(cal -v -- $month $year | head -n 1)
+
+    month_page="$(print_month $month $year)"
+    calendar_body="\n\n\n$previous_month\n\n\n\n$month_page\n\n\n\n$next_month\n\n\n"
+
+    previous_month_index="3"
+    next_month_index="59"
+    calendar_body_column="7"
+    urgent="-u $previous_month_index,$next_month_index"
+    active=""
+    selected_row=""
+
+    if [[ "$(echo $current_month | bc) $current_year" == "$(echo $month | bc) $year" ]]; then
+        current_day_index=$(($(find_day_index "$month_page" $current_day) + $calendar_body_column))
+        active="-a $current_day_index"
+        selected_row="-selected-row $current_day_index"
+    fi
+
+    if [[ $last_selected_option == $previous_month ]]; then
+        selected_row="-selected-row $previous_month_index"
+    fi
+
+    if [[ $last_selected_option == $next_month ]]; then
+        selected_row="-selected-row $next_month_index"
+    fi
+
+    echo -e "$calendar_body" | rofi -dmenu \
+    -theme $HOME/.config/rofi/themes/calendar.rasi \
+    -p "$calendar_header" $urgent $active $selected_row \
+    -monitor -1
+}
+
+while [[ true ]]; do
+    selected=$(calendar_menu)
+    last_selected_option="$selected"
+    case $selected in
+        $previous_month)
+            ((month--))
+            if [[ $month -lt 1 ]]; then
+                month=12
+                ((year--))
+            fi
+            ;;
+        $next_month)
+            ((month++))
+            if [[ $month -gt 12 ]]; then
+                month=1
+                ((year++))
+            fi
+            ;;
+        *)
+    		break
+    	    ;;
+    esac
+done