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;;; qbank.el --- Learning tool for GNU Emacs -*- lexical-binding: t; -*-
;; Copyright (C) 2023 Thanos Apollo
;; Author: Thanos Apollo <[email protected]>
;; Keywords: extensions
;; URL: https://git.thanosapollo.org/qbank
;; Version: 0.0.1
;; Package-Requires: ((emacs "27.2") (compat "29.1.4.2"))
;; 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
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Work in progress
;;; Code:
;; TODO: Create cloze question type & make it easily extensible for
;; other types
(require 'emacsql)
(require 'cl-lib)
(require 'animate)
(cl-defun qbank--select (table values &optional (restrictions '1=1))
"Select VALUES from TABLE, optionally with RESTRICTIONS."
(emacsql-with-connection (db (emacsql-sqlite "test2.db"))
(emacsql db `[:select ,values :from ,table :where ,restrictions])))
(cl-defun qbank--create-table (table-name &optional values)
"Create TABLE-NAME for VALUES."
(emacsql-with-connection (db (emacsql-sqlite "test2.db"))
(emacsql db `[:create-table ,table-name ,values])))
(cl-defun qbank--insert-into (table-name values)
"Insert VALUES to TABLE-NAME."
(emacsql-with-connection (db (emacsql-sqlite "test2.db"))
(emacsql db `[:insert :into ,table-name :values ,values])))
(defun qbank--get-question (id)
"Get question row for question ID."
(caar (qbank--select 'qbank1 'question `(= question_id ,id))))
(defun qbank--get-correct-answer (id)
"Get correct answer for question ID."
(caar (qbank--select 'qbank1 'answer `(= question_id ,id))))
(defun qbank--get-mcanswers (id)
"Get multiple choices for question ID."
(caar (qbank--select 'qbank1 'mchoices `(= question_id ,id))))
(defun qbank--display-question (id)
"Display question for question ID."
(let ((question (qbank--get-question id)))
;; Animate.el is used only for testing purposes.
(animate-string question 5)))
(defun qbank--mcanswers-choice (id)
"Display multiple choice answers for question ID."
(let ((mcanswers (qbank--get-mcanswers id)))
(completing-read "Answer: " mcanswers)))
(defun qbank--input-mcanswers ()
"Prompt user for multiple choice answers."
(let ((mcqs nil))
(while (not (equal (car mcqs) "q"))
(add-to-list 'mcqs (read-string "Choices (q for quit): ")))
(when (equal (car mcqs) "q")
(pop mcqs))
(reverse mcqs)))
(defun qbank-create-mcq-question ()
"Create question as MCQ type."
(interactive)
(let ((question (read-string "Question: "))
(choices (unless (equal choices "q")
(read-string "Choices: ")))))
(qbank--insert-into '))
(cl-defun qbank-create-mcq-question (&key question choices correct-answer)
"Create a QUESTION with a list of multiple CHOICES and one CORRECT-ANSWER.
This function can be used interactively, or if you prefer you may also
use it like this:
(qbank-create-mcq-question
:question \"Which one is the greatest editor?\"
:choices (list \"Emacs\" \"Vim\" \"VSCode\" \"Ed\")
:correct-answer 1)"
(interactive
(list :question (read-string "Question: ")
:choices (qbank-input-questions)
:correct-answer (string-to-number (read-string "Which is the correct answer?"))))
(qbank--insert-into 'qbank1 `([nil ,question ,choices ,correct-answer])))
;; Fix: review for seperate question types.
(defun qbank-review (id)
"Start review for question ID."
(let ((canswer (qbank--get-correct-answer id))
(choices (qbank--get-mcanswers id))
(user-choice (qbank--mcanswers-choice id)))
(if (equal (nth (- canswer 1) choices) user-choice)
(message "Correct!")
(message "False"))))
(defun qbank-test-buffer ()
"Create testing buffer."
(interactive)
(with-current-buffer
(switch-to-buffer (get-buffer-create "*qbank*"))
(qbank--display-question 13)
(qbank-review 13)))
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