zsh: ned: big improvements. check the usage() function for details

.config/shell/bin/ned

@@ -1,35 +1,85 @@
 #!/bin/bash
 # NEd: Note Editor (and your best friend!)
 # Ned can edit and create notes in a folder you tell him to!
+# Depends: fzf
 
-# shellcheck disable=SC2068
+# shellcheck disable=SC2068,SC2178,SC2128
 
-# set default value for $NOTES_DIR
-${NOTES_DIR:="$HOME/Documents/college/2y/2q/"}
+# set default values if things are unset
+NOTES_DIR="${NOTES_DIR:-"$HOME/Documents/college/current"}"
+EDITOR="${EDITOR:-"nvim"}"
 
-[ -d "$NOTES_DIR"/misc ] && mkdir "$NOTES_DIR/misc"
+usage() {
+   cat <<-EOF
+		Usage:
+		ned <verb>
+		   new <folder> [note name]        create a new note in the matched class folder
+		   edit [folder]                   search for and edit a text document in a folder
+		   help                            print this message
 
-# Create misc note if no input
-if [ -z "$1" ]; then
-   "$EDITOR" "$NOTES_DIR/unsorted/$(date)"
-   zsh
-fi
-
-new() {
-   if [ -z "$1" ]; then
-      "$EDITOR" "$NOTES_DIR/unsorted/$(date)"
-      zsh
-   fi
-
-   "$EDITOR" "$NOTES_DIR/$2"*"/notes/$3"
+		Notes:
+		   Right now, only the first letter of each option is considered, so \`ned n\` and \`ned neww\` do the same thing
+		   Folder and file names are globbed
+		   Current repository path: $NOTES_DIR
+	EOF
 }
 
-# Parse arguments
-case "$1" in
+edit() {
+   check_setup
+
+   NOTE_PATH=("$NOTES_DIR/$2"*)
+   NOTE_PATH="${NOTE_PATH[0]}"
+   if ! [ -d "$NOTE_PATH" ]; then
+      echo "No such directory: '$NOTE_PATH'"
+      exit 1
+   fi
+
+   NOTE_NAME="$(cd "$NOTE_PATH" && fzf --height=10 --layout=reverse)" || exit
+   "$EDITOR" "$NOTES_DIR/$NOTE_NAME"
+}
+
+new() {
+   check_setup
+   if [ -z "$3" ]; then
+      NOTE_NAME="$(date +'%F').md"
+   else
+      NOTE_NAME="$3.md"
+   fi
+
+   NOTE_PATH=("$NOTES_DIR/$2"*/notes)
+   NOTE_PATH="${NOTE_PATH[0]}"
+   if ! [ -d "$NOTE_PATH" ]; then
+      echo "No such directory: '$NOTE_PATH'"
+      exit 1
+   fi
+
+   "$EDITOR" "$NOTE_PATH/$NOTE_NAME"
+}
+
+subshell() {
+   echo 'entering subshell'
+   zsh
+}
+
+check_setup() {
+   # perform preliminary checks to make sure the script can run properly
+   if ! [ -d "$NOTES_DIR" ]; then
+      echo "Error: Notes directory ($NOTES_DIR) does not exist or is not a directory"
+      exit 1
+   fi
+}
+
+# Parse arguments (first character only)
+case "${1:0:1}" in
+   # help
+   'h') usage;;
    # create and edit new note
-   'new'|'n') new $@;;
-   # edit ned
-   'e') "$EDITOR" "$(realpath "$0")";;
+   'n') new $@;;
+   # edit an existing document or file
+   'e') edit $@;;
+   # me: edit ned (the file you are looking at)
+   'm') "$EDITOR" "$(realpath "$0")";;
    *) echo "no such option";;
 esac
 
+# vim: et sw=3 ts=3