updates track to support additive logs

track

@@ -2,7 +2,7 @@
 
 # This file defines track - a minimalist data tracker
 
-# Copyright (C) 2020 James Tomasino
+# Copyright (C) 2024 James Tomasino
 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -19,7 +19,7 @@
 
 #-----------------------------------------------------------------------
 
-version="2020.10.11"
+version="2024.04.15"
 
 show_help () {
   cat > /dev/stdout << END
@@ -32,6 +32,7 @@ DIRECTORY:
 
 USAGE:
   track weight 150            Log 150lbs for today's weight
+  track steps +500            Increase the numeric log of today's steps by 500
   track -n 10 calories        Show last 10 days calorie values
   track mood                  Show last value logged for mood
 
@@ -50,7 +51,7 @@ END
 # Determine tracking directory and ensure it is a directory
 TRACK_DIR=${TRACK_DIR:-.}
 if [ -f "$TRACK_DIR" ]; then
-  TRACK_DIR="$(dirname ${TRACK_DIR})"
+  TRACK_DIR="$(dirname "${TRACK_DIR}")"
 fi
 
 arg_metric=""
@@ -170,15 +171,41 @@ main () {
       printf "year,month,day,%s\\n" "${arg_metric}" > "$f"
     fi
 
-    if [ "${arg_value}" != "" ]; then
+    # Get arg parts
+    first_letter=$(printf %.1s "${arg_value}")
+
+    if [ "${arg_value}" != "" ]; then # add/update
       d=$(date '+%Y,%0m,%0d')
       l=$(sed -n "/$d/{=;}" "$f")
-      if [ -z "$l" ]; then
-        printf "%s,%s\\n" "$d" "${arg_value}" >> "$f"
-      else
-        sed -i"" "$l c $d,${arg_value}" "$f"
+
+      if [ "${first_letter}" = "+" ]; then # Add to existing value
+        rest="${arg_value#+}"
+        if [ -z "$l" ]; then
+          printf "%s,%s\\n" "$d" "${rest}" >> "$f"
+        else
+          val="$(sed "${l}q;d" "$f" | awk -F "," '{print $4}')" # get current value
+          # check if existing value is numeric before attempting to sum
+          if printf "%s" "$val" | grep -vEq '^[0-9]+([.][0-9]+)?$'; then
+            printf "Current value is not numeric. Abort.\\n"-
+            exit 1
+          fi
+          # check if new value is numeric before attempting to sum
+          if printf "%s" "$rest" | grep -vEq '^[0-9]+([.][0-9]+)?$'; then
+            printf "New value is not numeric. Abort.\\n"-
+            exit 1
+          fi
+          # sum new and previous values
+          newval=$((val+rest)) || exit 1
+          sed -i"" "$l c $d,${newval}" "$f"
+        fi
+      else # Replace existing value
+        if [ -z "$l" ]; then
+          printf "%s,%s\\n" "$d" "${arg_value}" >> "$f"
+        else
+          sed -i"" "$l c $d,${arg_value}" "$f"
+        fi
       fi
-    else
+    else # display value
       if [ ${flag_listall} -gt 0 ]; then
         if [ ${flag_csv} -gt 0 ]; then
           awk -F "," '{printf "%02d-%02d-%02d,%s\n", $1, $2, $3, $4;}' "$f"

track.1

@@ -1,4 +1,4 @@
-.TH TRACK 1 "11 Oct 2020" "v2020.10.11"
+.TH TRACK 1 "15 Apr 2024" "v2024.04.15"
 
 .SH NAME
 track \- a minimalistic data tracker