Add search functionality to note

Also tweak new and edit commands to delete/restore note if the file
is empty.

note

@@ -63,6 +63,22 @@ check_md5() {
     fi
 }
 
+check_empty() {
+    if [[ ! -s "$note_file" ]]
+    then
+        if [[ "$1" == "restore" ]]
+        then
+            gitfile=$(basename "$note_file")
+            git checkout $gitfile
+        elif [[ "$1" == "delete" ]]
+        then
+            rm -f $note_file
+        fi
+
+        exit
+    fi
+}
+
 check_dir() {
     if [[ ! -d "$NOTES_DIR" ]]
     then
@@ -92,6 +108,8 @@ Commands
     delete      Follow this with the note name to delete a note
     list        Prints the list of available notes
     history     Displays the note history
+    find        Finds all notes with the specified keyword in the filename
+    search      Finds all notes with the specified keyword in the text
     init        Run this the very first time to set up the folders
     help        Prints this help message
     version     Prints the version information
@@ -102,17 +120,7 @@ version_info() {
     echo "Notes Manager version $NOTES_VER"
 }
 
-parse_args() {
-    note_cmd=$1
-    shift
-    note_arg="$*"
-
-    case "$note_cmd" in
-    "help")
-        help_cmd
-        ;;
-
-    "new")
+note_new() {
     check_dir
     check_arg
     title_to_name
@@ -132,6 +140,7 @@ parse_args() {
     note_new_md5=$(md5sum $note_file)
     note_new_file=$NOTES_DIR/$(make_title $note_new_title)
     check_md5 $note_file
+    check_empty delete
 
     dprint "Original filename = " $note_file
     dprint "New filename = " $note_new_file
@@ -148,10 +157,9 @@ parse_args() {
     git add $gitfile
     git commit -m "Create note '$note_new_title'"
     echo "Created note '$note_new_title'"
+}
 
-        ;;
-
-    "edit")
+note_edit() {
     check_dir
     check_arg
     title_to_name
@@ -170,6 +178,7 @@ parse_args() {
     note_new_md5=$(md5sum $note_file)
 
     check_md5
+    check_empty restore
 
     cd $NOTES_DIR
     gitfile=$(basename $note_file)
@@ -187,9 +196,9 @@ parse_args() {
 
     git commit -m "$commit_msg"
     echo "Updated note '$note_new_title'"
-        ;;
+}
 
-    "del" | "delete")
+note_delete() {
     check_dir
     check_arg
     title_to_name
@@ -204,22 +213,77 @@ parse_args() {
     git rm $gitfile
     git commit -m "Delete note '$note_arg'"
     echo "Deleted note '$note_arg'"
-        ;;
+}
 
-    "hist"|"history")
+note_history() {
     check_dir
     cd $NOTES_DIR
     git log --pretty=format:'%ai - %s' -- $note_arg
+}
+
+note_list() {
+    check_dir
+    cd $NOTES_DIR
+    if [[ -z "$1" ]]
+    then
+        ls -1
+    else
+        ls -1 | grep -i $1
+    fi
+}
+
+note_search() {
+    check_dir
+    
+    if [[ -z "$1" ]]; then
+        echo "Must specify a pattern to search titles!"
+        exit
+    fi
+
+    cd $NOTES_DIR
+    for file in *
+    do
+        grep --color=always -il "\<$1\>" $file
+        grep --color=always -inhT -m2 -C1 "\<$1\>" $file
+    done
+}
+
+parse_args() {
+    note_cmd=$1
+    shift
+    note_arg="$*"
+
+    case "$note_cmd" in
+    "help")
+        help_cmd
+        ;;
+
+    "new")
+        note_new
+        ;;
+
+    "edit")
+        note_edit
+        ;;
+
+    "del" | "delete")
+        note_delete
+        ;;
+
+    "hist"|"history")
+        note_history
         ;;
     
     "init")
         notes_init
         ;;
     
-    "list")
-        check_dir
-        cd $NOTES_DIR
-        ls -1 $note_arg
+    "list" | "find")
+        note_list $1
+        ;;
+    
+    "search")
+        note_search $1
         ;;
 
     "ver" | "version")