Create a Rofi script for my lecture notes manager

.scripts/lecture-manager-shortcut.sh

@@ -0,0 +1,113 @@
+#!/bin/sh 
+
+help_section="
+This simply creates a quick rofi interface for my lectures manager. 
+The notes manager is a program I created. 
+You can find it in the following link:
+https://github.com/foo-dogsquared/a-remote-repo-full-of-notes-of-things-i-do-not-know-about/ .
+
+This shell script is specifically written for my system. 
+Don't expect it to work out-of-the-box so please edit this script accordingly. 
+"
+
+LECTURES=${LECTURES_DIRECTORY:-"$HOME/Documents/lectures"}
+TERM="alacritty" # binary name of your terminal emulator
+
+while [[ $# -gt 0 ]]
+do
+    case $1 in 
+        -h|--help)
+            echo "$help_section"
+            exit 0;;
+        *)
+            shift;;
+    esac
+done
+
+function prompt() {
+    value=$(exec "$1" || exit)
+
+    return value
+}
+
+
+options='Create a new subject
+Create a new lecture
+Remove a subject
+Remove a lecture
+List all subjects and its notes
+Open a note'
+
+actions=$(echo "$options" | rofi -dmenu -p "What do you want to do for the lectures?")
+
+if [[ $? != 0 ]]; then exit; fi
+
+lecture_manager_cmd="python $LECTURES/manager.py --target $HOME "
+notes_list=$(eval "$lecture_manager_cmd list :all:")
+
+if [[ $actions == 'Create a new subject' ]]; then 
+    subject=$(rofi -dmenu -p "What subject to be added into the binder?" || exit)
+    if [[ $? != 0 ]]; then exit; fi
+    
+    lecture_manager_cmd+="add --subject \"$subject\""
+elif [[ $actions == 'Create a new lecture' ]]; then 
+    subject_list=$(echo "$notes_list" | sed "/^Subject \".+\" has [[:digit:]]+ notes?$/p" | awk -F "[\"\"]" '{ for (i=2; i<NF; i+=2) print $i }')
+    subject=$(echo "$subject_list" | rofi -dmenu -p "What subject the lecture is for?" )
+    if [[ $? != 0 ]]; then exit; fi
+
+    title=$(rofi -dmenu -p "Title of new lecture?")
+    if [[ $? != 0 ]]; then exit; fi
+    
+    lecture_manager_cmd+="add --note \"$subject\" \"$title\" "
+elif [[ $actions == 'Remove a subject' ]]; then 
+    subject_list=$(echo "$notes_list" | sed "/^Subject \".+\" has [[:digit:]]+ notes?$/p" | awk -F "[\"\"]" '{ for (i=2; i<NF; i+=2) print $i }')
+    subject=$(echo "$subject_list" | rofi -dmenu -p "What subject do you want to remove?")
+    if [[ $? != 0 ]]; then exit; fi
+    lecture_manager_cmd+="remove --subject \"$subject\""
+elif [[ $actions == 'Remove a lecture' ]]; then
+    subject_list=$(echo "$notes_list" | sed "/^Subject \".+\" has [[:digit:]]+ notes?$/p" | awk -F "[\"\"]" '{ for (i=2; i<NF; i+=2) print $i }')
+    subject=$(echo "$subject_list" | rofi -dmenu -p "What subject does the lecture belongs to?")
+    if [[ $? != 0 ]]; then exit; fi
+
+    note_list=$(eval $lecture_manager_cmd 'list' "$subject" | sed -n "s/^\s*-\s*//p")
+    title=$(echo "$note_list" | rofi -dmenu -p "What is the title of the note to be removed?")
+    if [[ $? != 0 ]]; then exit; fi
+
+    delete=$(echo -e "Yes\nNo" | rofi -dmenu -p "Delete the files on the disk?")
+    if [[ $? != 0 ]]; then exit; fi
+
+    if [[ $delete == "Yes" ]]; then 
+        $lecture_manager_cmd+="--delete " 
+    fi
+    
+    lecture_manager_cmd+="--note \"$subject\" \"$title\""
+elif [[ $actions == 'List all subjects and its notes' ]]; then 
+    lecture_manager_cmd+="list :all: "
+    notes=$(eval $lecture_manager_cmd)
+    echo "$notes" | rofi -dmenu -p "Here are the notes"
+    exit 0
+elif [[ $actions == 'Open a note' ]]; then 
+    notes=$(echo "$notes_list" | grep --regexp="^\s*-\s*" | sed -n "s/^\s*-\s*//p")
+
+    selected_note=$(echo "$notes" | rofi -dmenu -p "Select a note to be opened." | awk -F "[()]" '{ for (i=2; i<NF; i+=2) print $i }')
+    if [[ $selected_note < 0 || $? != 0 ]]; then exit; fi
+    
+    # I have my Pygmentize package in a virtual env, so I have the line below. 
+    # You can omit the line, if you have Pygmentize installed.
+    source texture-notes-env/bin/activate
+    exec "$TERM" --command python "$LECTURES/manager.py" open $selected_note 
+    if [[ $? != 0 ]]; then 
+        notify-send "Opening note has failed."
+    fi
+    
+    exit
+fi
+
+status=$(eval $lecture_manager_cmd)
+
+
+if [[ $? != 0 ]]; then
+    notify-send "$status"
+else 
+    notify-send "Lecture manager action successful!" "Resulting command: \"$lecture_manager_cmd\""
+fi