Repository: jwasham/computer-science-flash-cards Branch: main Commit: 360cfdece0cd Files: 30 Total size: 80.1 KB Directory structure: gitextract_vd9a3nyi/ ├── .gitignore ├── Dockerfile ├── README.md ├── config.txt ├── data/ │ ├── handle_old_schema.sql │ └── schema.sql ├── db/ │ └── .gitkeep ├── docker-compose.yml ├── entrypoint.sh ├── flash_cards.ini ├── flash_cards.py ├── flash_cards.service ├── license.md ├── requirements.txt ├── static/ │ ├── general.js │ ├── highlight-theme-github.css │ ├── highlight.pack.js │ └── style.css ├── templates/ │ ├── cards.html │ ├── createDb.html │ ├── edit.html │ ├── editTag.html │ ├── layout.html │ ├── listDb.html │ ├── login.html │ ├── memorize.html │ ├── memorize_known.html │ ├── show.html │ └── tags.html └── wsgi.py ================================================ FILE CONTENTS ================================================ ================================================ FILE: .gitignore ================================================ .idea/ py3env/ __pycache__/ *.pyc config-personal.txt cards.db env ================================================ FILE: Dockerfile ================================================ FROM python:3.9 LABEL maintainer="Tinpee " ADD . /src WORKDIR /src RUN pip install --upgrade pip \ && pip install flask gunicorn COPY entrypoint.sh / RUN sed -i 's/\r$//' /entrypoint.sh RUN chmod +x /entrypoint.sh VOLUME /src/db EXPOSE 8000 CMD ["/entrypoint.sh"] ================================================ FILE: README.md ================================================ # Computer Science Flash Cards This is a little website I've put together to allow me to easily make flash cards and quiz myself for memorization of: - General cs knowledge - vocabulary - definitions of processes - powers of 2 - design patterns - Code - data structures - algorithms - solving problems - bitwise operations Will be able to use it on: - desktop - mobile (phone and tablet) It uses: - Python 3 - Flask - SQLite --- ## About the Site Here's a brief rundown: https://startupnextdoor.com/flash-cards-site-complete/ ## Screenshots UI for listing cards. From here you can add and edit cards. ![Card UI](screenshots/cards_ui-1467754141259.png) --- The front of a General flash card. ![Memorizing general knowledge](screenshots/memorize_ui-1467754306971.png) --- The reverse (answer side) of a Code flash card. ![Code view](screenshots/memorize_code-1467754962142.png) ## Important Note The set included in this project (**cards-jwasham.db**) is not my full set, and is way too big already. Thanks for asking for my list of 1,792 cards. But **it’s too much.** I even printed them out. It’s 50 pages, front and back, in tiny text. It would take about 8 hours to just read them all. My set includes a lot of obscure info from books I’ve read, Python trivia, machine learning knowledge, assembly language, etc. I've added it to the project if you want it (**cards-jwasham-extreme.db**). You've been warned. Please make your own set, and while you’re making them, only make cards for what you need to know. Otherwise, it gets out of hand. ## How to convert to Anki or CSV If you don't want to run a server, you can simply use Anki or a similar service/app. Use this script to convert from my sets (SQLite .db file), or yours, to CSV: https://github.com/eyedol/tools/blob/master/anki_data_builder.py Thanks [@eyedol](https://github.com/eyedol) ## Anki Flashcards: * [computer science flash cards - (basic)](https://ankiweb.net/shared/info/1782040640) * [computer science flash cards - (extreme)](https://ankiweb.net/shared/info/1691396127) Thanks [@JackKuo-tw](https://github.com/JackKuo-tw) ## How to run it on a server 1. Clone project to a directory on your web server. 1. Edit the config.txt file. Change the secret key, username and password. The username and password will be the login for your site. There is only one user - you. 1. Follow this long tutorial to get Flask running. It was way more work than it should be: https://www.digitalocean.com/community/tutorials/how-to-serve-flask-applications-with-uwsgi-and-nginx-on-ubuntu-16-04 - `wsgi.py` is the entry point. It calls `flash_cards.py` - This is my systemd file `/etc/systemd/system/flash_cards.service`: [view](flash_cards.service) - you can see the paths where I installed it, and the name of my virtualenv directory - when done with tutorial: ```shell sudo systemctl restart flash_cards sudo systemctl daemon-reload ``` 1. When you see a login page, you're good to go. 1. Log in. 1. Click the "General" or "Code" button and make a card! 1. When you're ready to start memorizing, click either "General" or "Code" in the top menu. ## How to run it on local host (Quick Guide) *Provided by [@devyash](https://github.com/devyash) - devyashsanghai@gmail.com - Reach out to this contributor if you have trouble.* 1. Install dependencies: 1. Install [Python](https://www.python.org/download/releases) 1. Add python as environment variable [windows](http://stackoverflow.com/questions/3701646/how-to-add-to-the-pythonpath-in-windows-7) 1. To install pip, securely download [get-pip.py](https://bootstrap.pypa.io/get-pip.py) 1. Run `python get-pip.py` in terminal 1. Add pip to your PATH system variable [windows](https://stackoverflow.com/questions/23708898/pip-is-not-recognized-as-an-internal-or-external-command) 1. Run `pip install -r requirements.txt` in terminal after going to correct folder 1. Type `python flash_cards.py` - if you get error for flask then use `python -m pip install Flask` first then run `flash_card.py` file 1. Open localhost:5000/ 1. Login using 'admin' and 'default' for the username and password, respectively. **NOTE:** If you wish to use John's flash cards then also do following steps: 1. Copy db files such as `cards-jwasham-extreme` OR `cards-jwasham` and paste them in db folder 1. Edit file `flash_cards.py` line 8 and replace 'cards.db' with any of the other database files e.g.('cards-jwasham.db') 1. Repeat the above steps from step 3 Every time you wish to run your db just open folder in terminal and run `python flash_cards.py` ## How to run with Docker *Provided by [@Tinpee](https://github.com/tinpee) - tinpee.dev@gmail.com - Reach out to this contributor if you have trouble.* __Make sure you already installed [docker](https://www.docker.com) and optionally [docker-compose](https://docs.docker.com/compose/install/)__ 1. Clone project to any where you want and go to source folder. 1. Edit the `config.txt` file. Change the secret key, username and password. The username and password will be the login for your site. There is only one user - you. 1. Build image: - Docker: `docker build . -t cs-flash-cards` - Compose: `docker-compose build` 1. Run container: - Docker: `docker run -d -p 8000:8000 --name cs-flash-cards cs-flash-cards` - Compose: `docker-compose up` 1. Go your browser and type `http://localhost:8000` __If you already had a backup file `cards.db`. Run following command:__ *Note: We don't need to rebuild image, just delete old container if you already built.* ```shell docker run -d -p 8000:8000 --name cs-flash-cards -v :/src/db cs-flash-cards ``` - ``: is the full path contains `cards.db`. - Example: `/home/tinpee/cs-flash-cards/db`, and `cards.db` is inside this folder. For convenience, if you don't have `cards.db`, this container will auto copy a new one from `cards-empty.db`. --- ### How to backup data ? We just need store `cards.db` file, and don't need any sql command. - If you run container with `-v :/src/db` just go to `folder_db` and store `cards.db` anywhere you want. - Without `-v flag`. Type: `docker cp :/src/db/cards.db /path/to/save` ### How to restore data ? - Delete old container (not image): `docker rm cs-flash-cards` - Build a new one with `-v flag`: `docker run -d -p 8000:8000 --name cs-flash-cards -v :/src/db cs-flash-cards` - Voila :) ### How to deploy docker file on heroku - first install [heroku CLI](https://devcenter.heroku.com/articles/heroku-cli) - change `entrypoint.sh` ```shell - export CARDS_SETTINGS=/src/config.txt gunicorn --bind 0.0.0.0:$8000 flash_cards:app + export CARDS_SETTINGS=/src/config.txt gunicorn --bind 0.0.0.0:$PORT flash_cards:app ``` - deploy docker file with following commands ```shell heroku login heroku container:login heroku create # Creating app... done, ⬢ your-app-name heroku container:push web --app your-app-name heroku container:release web --app your-app-name heroku open --app your-app-name ``` ## Alternative for Node fans [@ashwanikumar04](https://github.com/ashwanikumar04) put together an alternative flash cards site running Node: https://github.com/ashwanikumar04/flash-cards Check out the demo! *Happy learning!* ================================================ FILE: config.txt ================================================ SECRET_KEY='some very long key here' USERNAME='username-test' PASSWORD='password-test' ================================================ FILE: data/handle_old_schema.sql ================================================ create table if not exists tags ( id integer primary key autoincrement, tagName text not null ); ================================================ FILE: data/schema.sql ================================================ -- drop table if exists cards; create table cards ( id integer primary key autoincrement, type tinyint not null, /* 1 for vocab, 2 for code */ front text not null, back text not null, known boolean default 0 ); create table tags ( id integer primary key autoincrement, tagName text not null ); ================================================ FILE: db/.gitkeep ================================================ ================================================ FILE: docker-compose.yml ================================================ version: '3' services: cs-flash-cards: build: . ports: - 8000:8000 volumes: - ./cards-empty.db:/src/db/cards.db # - ./cards-jwasham-extreme.db:/src/db/cards.db # - ./cards-jwasham.db:/src/db/cards.db ================================================ FILE: entrypoint.sh ================================================ #!/bin/bash if [ ! -f /src/db/cards.db ]; then cp cards-empty.db /src/db/cards.db fi export CARDS_SETTINGS=/src/config.txt gunicorn --bind 0.0.0.0:8000 flash_cards:app ================================================ FILE: flash_cards.ini ================================================ [uwsgi] module = wsgi:app master = true processes = 5 socket = flash_cards.sock chmod-socket = 660 vacuum = true die-on-term = true ================================================ FILE: flash_cards.py ================================================ import os import sqlite3 from flask import Flask, request, session, g, redirect, url_for, abort, \ render_template, flash app = Flask(__name__) app.config.from_object(__name__) nameDB='cards.db' pathDB='db' def load_config(): app.config.update(dict( DATABASE=os.path.join(app.root_path, pathDB, nameDB), SECRET_KEY='development key', USERNAME='admin', PASSWORD='default' )) app.config.from_envvar('CARDS_SETTINGS', silent=True) if __name__ == "__main__" or __name__ == "flash_cards": load_config() def connect_db(): rv = sqlite3.connect(app.config['DATABASE']) rv.row_factory = sqlite3.Row return rv def init_db(): db = get_db() with app.open_resource('data/schema.sql', mode='r') as f: db.cursor().executescript(f.read()) db.commit() def get_db(): """Opens a new database connection if there is none yet for the current application context. """ if not hasattr(g, 'sqlite_db'): g.sqlite_db = connect_db() return g.sqlite_db @app.teardown_appcontext def close_db(error): """Closes the database again at the end of the request.""" if hasattr(g, 'sqlite_db'): g.sqlite_db.close() @app.route('/') def index(): if session.get('logged_in'): return redirect(url_for('list_db')) else: return redirect(url_for('login')) @app.route('/cards') def cards(): if not session.get('logged_in'): return redirect(url_for('login')) db = get_db() query = ''' SELECT id, type, front, back, known FROM cards ORDER BY id DESC ''' cur = db.execute(query) cards = cur.fetchall() tags = getAllTag() return render_template('cards.html', cards=cards, tags=tags, filter_name="all") @app.route('/filter_cards/') def filter_cards(filter_name): if not session.get('logged_in'): return redirect(url_for('login')) filters = { "all": "where 1 = 1", "general": "where type = 1", "code": "where type = 2", "known": "where known = 1", "unknown": "where known = 0", } query = filters.get(filter_name) if(query is None): query = "where type = {0}".format(filter_name) filter_name = int(filter_name) if not query: return redirect(url_for('show')) db = get_db() fullquery = "SELECT id, type, front, back, known FROM cards " + \ query + " ORDER BY id DESC" cur = db.execute(fullquery) cards = cur.fetchall() tags = getAllTag() return render_template('show.html', cards=cards, tags=tags, filter_name=filter_name) @app.route('/add', methods=['POST']) def add_card(): if not session.get('logged_in'): return redirect(url_for('login')) db = get_db() db.execute('INSERT INTO cards (type, front, back) VALUES (?, ?, ?)', [request.form['type'], request.form['front'], request.form['back'] ]) db.commit() flash('New card was successfully added.') return redirect(url_for('cards')) @app.route('/edit/') def edit(card_id): if not session.get('logged_in'): return redirect(url_for('login')) db = get_db() query = ''' SELECT id, type, front, back, known FROM cards WHERE id = ? ''' cur = db.execute(query, [card_id]) card = cur.fetchone() tags = getAllTag() return render_template('edit.html', card=card, tags=tags) @app.route('/edit_card', methods=['POST']) def edit_card(): if not session.get('logged_in'): return redirect(url_for('login')) selected = request.form.getlist('known') known = bool(selected) db = get_db() command = ''' UPDATE cards SET type = ?, front = ?, back = ?, known = ? WHERE id = ? ''' db.execute(command, [request.form['type'], request.form['front'], request.form['back'], known, request.form['card_id'] ]) db.commit() flash('Card saved.') return redirect(url_for('show')) @app.route('/delete/') def delete(card_id): if not session.get('logged_in'): return redirect(url_for('login')) db = get_db() db.execute('DELETE FROM cards WHERE id = ?', [card_id]) db.commit() flash('Card deleted.') return redirect(url_for('cards')) @app.route('/memorize') @app.route('/memorize/') @app.route('/memorize//') def memorize(card_type, card_id=None): tag = getTag(card_type) if tag is None: return redirect(url_for('cards')) if card_id: card = get_card_by_id(card_id) else: card = get_card(card_type) if not card: flash("You've learned all the '" + tag[1] + "' cards.") return redirect(url_for('show')) short_answer = (len(card['back']) < 75) tags = getAllTag() card_type = int(card_type) return render_template('memorize.html', card=card, card_type=card_type, short_answer=short_answer, tags=tags) @app.route('/memorize_known') @app.route('/memorize_known/') @app.route('/memorize_known//') def memorize_known(card_type, card_id=None): tag = getTag(card_type) if tag is None: return redirect(url_for('cards')) if card_id: card = get_card_by_id(card_id) else: card = get_card_already_known(card_type) if not card: flash("You haven't learned any '" + tag[1] + "' cards yet.") return redirect(url_for('show')) short_answer = (len(card['back']) < 75) tags = getAllTag() card_type = int(card_type) return render_template('memorize_known.html', card=card, card_type=card_type, short_answer=short_answer, tags=tags) def get_card(type): db = get_db() query = ''' SELECT id, type, front, back, known FROM cards WHERE type = ? and known = 0 ORDER BY RANDOM() LIMIT 1 ''' cur = db.execute(query, [type]) return cur.fetchone() def get_card_by_id(card_id): db = get_db() query = ''' SELECT id, type, front, back, known FROM cards WHERE id = ? LIMIT 1 ''' cur = db.execute(query, [card_id]) return cur.fetchone() @app.route('/mark_known//') def mark_known(card_id, card_type): if not session.get('logged_in'): return redirect(url_for('login')) db = get_db() db.execute('UPDATE cards SET known = 1 WHERE id = ?', [card_id]) db.commit() flash('Card marked as known.') return redirect(url_for('memorize', card_type=card_type)) @app.route('/login', methods=['GET', 'POST']) def login(): error = None if request.method == 'POST': if request.form['username'] != app.config['USERNAME']: error = 'Invalid username or password!' elif request.form['password'] != app.config['PASSWORD']: error = 'Invalid username or password!' else: session['logged_in'] = True session.permanent = True # stay logged in return redirect(url_for('index')) return render_template('login.html', error=error) @app.route('/logout') def logout(): session.pop('logged_in', None) flash("You've logged out") return redirect(url_for('index')) def getAllTag(): if not session.get('logged_in'): return redirect(url_for('login')) db = get_db() query = ''' SELECT id, tagName FROM tags ORDER BY id ASC ''' cur = db.execute(query) tags = cur.fetchall() return tags @app.route('/tags') def tags(): if not session.get('logged_in'): return redirect(url_for('login')) tags = getAllTag() return render_template('tags.html', tags=tags, filter_name="all") @app.route('/addTag', methods=['POST']) def add_tag(): if not session.get('logged_in'): return redirect(url_for('login')) db = get_db() db.execute('INSERT INTO tags (tagName) VALUES (?)', [request.form['tagName']]) db.commit() flash('New tag was successfully added.') return redirect(url_for('tags')) @app.route('/editTag/') def edit_tag(tag_id): if not session.get('logged_in'): return redirect(url_for('login')) tag = getTag(tag_id) return render_template('editTag.html', tag=tag) @app.route('/updateTag', methods=['POST']) def update_tag(): if not session.get('logged_in'): return redirect(url_for('login')) db = get_db() command = ''' UPDATE tags SET tagName = ? WHERE id = ? ''' db.execute(command, [request.form['tagName'], request.form['tag_id'] ]) db.commit() flash('Tag saved.') return redirect(url_for('tags')) def init_tag(): if not session.get('logged_in'): return redirect(url_for('login')) db = get_db() db.execute('INSERT INTO tags (tagName) VALUES (?)', ["general"]) db.commit() db.execute('INSERT INTO tags (tagName) VALUES (?)', ["code"]) db.commit() db.execute('INSERT INTO tags (tagName) VALUES (?)', ["bookmark"]) db.commit() @app.route('/show') def show(): if not session.get('logged_in'): return redirect(url_for('login')) tags = getAllTag() return render_template('show.html', tags=tags, filter_name="") def getTag(tag_id): if not session.get('logged_in'): return redirect(url_for('login')) db = get_db() query = ''' SELECT id, tagName FROM tags WHERE id = ? ''' cur = db.execute(query, [tag_id]) tag = cur.fetchone() return tag @app.route('/bookmark//') def bookmark(card_type, card_id): if not session.get('logged_in'): return redirect(url_for('login')) db = get_db() db.execute('UPDATE cards SET type = ? WHERE id = ?',[card_type,card_id]) db.commit() flash('Card saved.') return redirect(url_for('memorize', card_type=card_type)) @app.route('/list_db') def list_db(): if not session.get('logged_in'): return redirect(url_for('login')) dbs = [f for f in os.listdir(pathDB) if os.path.isfile(os.path.join(pathDB, f))] dbs = list(filter(lambda k: '.db' in k, dbs)) return render_template('listDb.html', dbs=dbs) @app.route('/load_db/') def load_db(name): if not session.get('logged_in'): return redirect(url_for('login')) global nameDB nameDB=name load_config() handle_old_schema() return redirect(url_for('memorize', card_type="1")) @app.route('/create_db') def create_db(): if not session.get('logged_in'): return redirect(url_for('login')) return render_template('createDb.html') @app.route('/init', methods=['POST']) def init(): if not session.get('logged_in'): return redirect(url_for('login')) global nameDB nameDB = request.form['dbName'] + '.db' load_config() init_db() init_tag() return redirect(url_for('index')) def check_table_tag_exists(): db = get_db() cur = db.execute("SELECT name FROM sqlite_master WHERE type='table' AND name='tags'") result = cur.fetchone() return result def create_tag_table(): db = get_db() with app.open_resource('data/handle_old_schema.sql', mode='r') as f: db.cursor().executescript(f.read()) db.commit() def handle_old_schema(): result = check_table_tag_exists() if(result is None): create_tag_table() init_tag() def get_card_already_known(type): db = get_db() query = ''' SELECT id, type, front, back, known FROM cards WHERE type = ? and known = 1 ORDER BY RANDOM() LIMIT 1 ''' cur = db.execute(query, [type]) return cur.fetchone() @app.route('/mark_unknown//') def mark_unknown(card_id, card_type): if not session.get('logged_in'): return redirect(url_for('login')) db = get_db() db.execute('UPDATE cards SET known = 0 WHERE id = ?', [card_id]) db.commit() flash('Card marked as unknown.') return redirect(url_for('memorize_known', card_type=card_type)) if __name__ == '__main__': app.run(host='0.0.0.0') ================================================ FILE: flash_cards.service ================================================ [Unit] Description=uWSGI instance to serve flash_cards After=network.target [Service] User=john Group=www-data WorkingDirectory=/var/www/cs_flash_cards Environment="PATH=/var/www/cs_flash_cards/py3env/bin" Environment="CARDS_SETTINGS=/var/www/cs_flash_cards/config-personal.txt" ExecStart=/var/www/cs_flash_cards/py3env/bin/uwsgi --ini flash_cards.ini [Install] WantedBy=multi-user.target ================================================ FILE: license.md ================================================ Attribution-ShareAlike 4.0 International ======================================================================= Creative Commons Corporation ("Creative Commons") is not a law firm and does not provide legal services or legal advice. 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.cardContent .tagContent h4 { margin-top: 0; } .alignContainer { display: table; width: 100%; } .alignMiddle { height: 20em; display: table-cell; vertical-align: middle; } .cardBack { display: none; } .largerText { font-size: 2em; } /* disables collapsing header menu */ .navbar-collapse.collapse { display: block!important; } .navbar-nav>li, .navbar-nav { float: left !important; } .navbar-nav.navbar-right:last-child { margin-right: 0 !important; } .navbar-right { float: right!important; } ================================================ FILE: templates/cards.html ================================================ {% extends "layout.html" %} {% block body %}

Add a Card

{% for tag in tags %} {% endfor %}

{{ cards|length }} Card{{ '' if (cards|length == 1) else 's' }}

{% endblock %} ================================================ FILE: templates/createDb.html ================================================ {% extends "layout.html" %} {% block body %}

Init database

{% endblock %} ================================================ FILE: templates/edit.html ================================================ {% extends "layout.html" %} {% block body %}

Edit Card #{{ card.id }}

{% for tag in tags %} {% endfor %}
Remove
{% endblock %} ================================================ FILE: templates/editTag.html ================================================ {% extends "layout.html" %} {% block body %}

Edit Tag #{{ tag.id }}

{% endblock %} ================================================ FILE: templates/layout.html ================================================ CS Flash Cards

{% for message in get_flashed_messages() %} {% endfor %} {% block body %}{% endblock %}
================================================ FILE: templates/listDb.html ================================================ {% extends "layout.html" %} {% block body %} {% for db in dbs %} {% else %} {% endfor %}
Load

{{ db }}

No dbs to show.
{% endblock %} ================================================ FILE: templates/login.html ================================================ {% extends "layout.html" %} {% block body %}

Login

{% if error %} {% endif %}
{% endblock %} ================================================ FILE: templates/memorize.html ================================================ {% extends "layout.html" %} {% block body %}
{% for tag in tags %} {{tag.tagName}} {% endfor %}

{{ card.front }}

{% if card.type == 1 %} {% if short_answer %}
{% endif %} {{ card.back|replace("\n", "
")|safe }} {% if short_answer %}
{% endif %} {% else %} 
{{ card.back|escape }}
{% endif %}
Flip Card     I Know It     Next Card



bookmark this card (#{{ card.id }})
{% endblock %} ================================================ FILE: templates/memorize_known.html ================================================ {% extends "layout.html" %} {% block body %}
{% for tag in tags %} {{tag.tagName}} {% endfor %}

{{ card.front }}

{% if card.type == 1 %} {% if short_answer %}
{% endif %} {{ card.back|replace("\n", "
")|safe }} {% if short_answer %}
{% endif %} {% else %} 
{{ card.back|escape }}
{% endif %}
Flip Card     I Unknow It     Next Card



bookmark this card (#{{ card.id }})
{% endblock %} ================================================ FILE: templates/show.html ================================================ {% extends "layout.html" %} {% block body %}

{{ cards|length }} Card{{ '' if (cards|length == 1) else 's' }}

all {% for tag in tags %} {{tag.tagName}} {% endfor %} known unknown


{% for card in cards %} {% else %} {% endfor %}

{{ card.front }}

{% if card.type == 1 %} {{ card.back|replace("\n", "
")|safe }} {% else %} 
{{ card.back|escape }}
{% endif %}
No cards to show.
{% endblock %} ================================================ FILE: templates/tags.html ================================================ {% extends "layout.html" %} {% block body %}

Add a Tag

{{ tags|length }} Tag{{ '' if (tags|length == 1) else 's' }}



{% for tag in tags %} {% else %} {% endfor %}

{{ tag.tagName }}

No tags to show.
{% endblock %} ================================================ FILE: wsgi.py ================================================ from flash_cards import app if __name__ == "__main__": app.run()