#!/bin/sh
# Note-taking Script:
# http://jon.smajda.com/blog/2008/06/03/script-for-notes/
#
# NOTES:
# the only non-standard command is "trash" (6 lines up from bottom)
# substitute rm or, on Macs, "sudo gem install osx-trash" to get trash
set -e

# some variables
noteDir="/home/you/path/to/notes"
notePrefix="note" # so note1, note2, etc.
noteExtension="tex" # .tex, .txt, .whatever

#######################################################
# Search through existing entries

#### function for -s and -t options
catFlagFunction () {
    findPattern=`echo $findPatterns | sed 's/ /|/g'`
    hline=`perl -e 'print "%" x60'`
    for i in $noteDir/*; do
        if [ ! -z $tagsOnly ]; then
            ### for -t flag, search only tags
            ### there's probably a better way but...
            if [ `grep TAGS $i | grep -Eic "$findPattern"` -ne 0 ]; then
                echo $hline
                cat $i
            fi
        else
            ### for -s flag, search all of the file 
            if [ `grep -Eic "$findPattern" $i` -ne 0 ]; then
                echo $hline
                cat $i
            fi
        fi
    done
}

#### check if -s or -t is used
while [ "${1:0:1}" = "-" ]; do
        case "$1" in
            '-s')
               catFlag='true' 
            ;;
            '-t')
               catFlag='true' 
               tagsOnly='true'
            ;;
        esac
shift
done

#### save the rest as patterns to search
findPatterns="$@"

#### if -s or -t is used, send to catflagfunction
if [ ! -z $catFlag ]; then
    catFlagFunction
    exit
fi


#######################################################
# Create new entry

#### Get unique noteId
counter=1
noteId=$notePrefix''$counter
while [ -f $noteDir/"$noteId"."$noteExtension" ]; do
    counter=$((counter + 1))
    noteId=$notePrefix''$counter
done
noteFile="$noteDir"/"$noteId"."$noteExtension"

#### create template
echo "% $counter" > "$noteFile"
echo "% "`date` >> "$noteFile"
echo "% TAGS: " >> "$noteFile"

editPre=`cat "$noteFile"` # for checking after editing
#### edit in vim (+3 puts you on line 3, use -c to set tex as filetype)
#### or substitute your editor of choice:
vi +3 -c ":set filetype=tex" "$noteFile" 
editPost=`cat "$noteFile"` # to check for edits

#### check for edits then save
if [ "$editPre" = "$editPost" ]; then
    echo "Cancelling $noteId.$noteExtension..."
    trash "$noteFile"  
    echo "Done."
else
    echo "Saving $noteId.$noteExtension..."
    echo "Done."
fi