delete functionality

src/main.sh

@@ -308,6 +308,15 @@ if [ -z "${WEEKLY_DATA_FILE:-}" ]; then
   export WEEKLY_DATA_FILE
 fi
 
+if [ "${1:-}" = "--help" ]; then
+  echo "Usage: $0 [OPTION]"
+  echo ""
+  echo "You may specify at most one option."
+  echo "  --help                 Show this help and exit"
+  echo "  --new                  Create new entry"
+  exit
+fi
+
 if [ "${1:-}" = "--new" ]; then
   collection=$(echo "$COLLECTION_LABELS" | tr ';' '\n' | $FZF --delimiter='=' --with-nth=2 --accept-nth=1)
   fpath=""
@@ -355,6 +364,31 @@ if [ "${1:-}" = "--preview" ]; then
   exit
 fi
 
+if [ "${1:-}" = "--delete" ]; then
+  fpath=$(echo "$2" | cut -d '|' -f 4 | sed "s/ /|/g")
+  if [ -n "$fpath" ]; then
+    fpath="$ROOT/$fpath"
+    summary=$(awk -v field="SUMMARY" "$AWK_GET" "$fpath")
+    while true; do
+      printf "Do you want to delete the entry with the title \"%s\"? (yes/no): " "$summary" >/dev/tty
+      read -r yn
+      case $yn in
+      "yes")
+        rm -v "$fpath"
+        break
+        ;;
+      "no")
+        break
+        ;;
+      *)
+        echo "Please answer \"yes\" or \"no\"." >/dev/tty
+        ;;
+      esac
+    done
+  fi
+  exec $0 --day "$DISPLAY_DATE"
+fi
+
 if [ "${1:-}" = "--day-reload" ]; then
   __show_day
   exit
@@ -379,7 +413,8 @@ if [ "${1:-}" = "--day" ]; then
         --accept-nth='1,2,3,4' \
         --preview="$0 --preview {}" \
         --expect="ctrl-n" \
-        --bind="ctrl-s:execute($SYNC_CMD ; printf 'Press <enter> to continue.'; read -r tmp)"
+        --bind="ctrl-s:execute($SYNC_CMD ; printf 'Press <enter> to continue.'; read -r tmp)" \
+        --bind="ctrl-alt-d:become($0 --delete {})"
   )
   key=$(echo "$selection" | head -1)
   line=$(echo "$selection" | tail -1)