AdvLabDB/manage.py

#!/usr/bin/python3

import secrets
import subprocess  # nosec 404
from datetime import date
from math import ceil
from pathlib import Path
from random import randint, random
from shutil import copytree, rmtree
from test.assistant_names import assistant_names
from test.experiment_titles import experiment_titles
from test.student_names import student_names

import click
from email_validator import validate_email
from flask_admin import __file__ as flask_admin_path
from flask_security import admin_change_password, hash_password
from sqlalchemy import select

from advlabdb import create_app, settings, user_datastore
from advlabdb.exceptions import DatabaseException
from advlabdb.model_independent_funs import randomPassword
from advlabdb.models import (
    MAX_YEAR,
    MIN_YEAR,
    Admin,
    Appointment,
    Assistant,
    Experiment,
    Group,
    GroupExperiment,
    Part,
    PartStudent,
    Program,
    Semester,
    SemesterExperiment,
    Student,
    User,
    db,
)


def run(command: str, **kwargs):
    return subprocess.run(command, shell=True, **kwargs)  # nosec B602


def box(message: str):
    click.echo()
    click.echo(click.style(f" {message} ", bg="white", fg="black"))
    click.echo()


def db_add(obj):
    db.session.add(obj)
    return obj


# Class to validate email in click.prompt
class EmailParamType(click.ParamType):
    def convert(self, value, param, ctx):
        try:
            return validate_email(value).email
        except Exception:
            self.fail(f"{value} is not a valid email!", param, ctx)


@click.group(
    help="Command line tool to manage AdvLabDB.",
)
def cli():
    pass


@cli.group(
    short_help="Setup commands.",
    help="Commands used to setup an AdvLabDB instance.",
)
def setup():
    pass


@setup.command(
    short_help="Generate required secrets.",
    help="Generate the file secrets.ini if it does not already exist.",
)
def generate_secrets():
    file = Path("secrets.ini")

    if file.is_file():
        click.echo(f"Skipping secrets generation because the secrets file does already exist at {file}.")
        return

    with open(file, "w") as f:
        f.write("[Secrets]\n")

        key = secrets.SystemRandom().getrandbits(128)
        f.write(f"SECRET_KEY = {key}\n")

        salt = secrets.token_hex()
        f.write(f"SECURITY_PASSWORD_SALT = {salt}\n")


@setup.command(
    short_help="Initialize the database.",
    help="Initialize the database if it does not already exist.",
)
def init_db():
    db_file = Path(settings["SQLITE_DB_PATH"])
    if db_file.is_file():
        click.echo(f"Skipping database initialization because the database does already exist at {db_file}.")
        return

    app = create_app(create_for_server=False)

    with app.app_context():
        with db.session.begin():
            # Create new database
            db.create_all()

            semester_label = click.prompt(
                "Enter the label of the current semester",
                type=click.Choice(("SS", "WS")),
            )
            semester_year = click.prompt(
                f"Enter the year of the current semester (between {MIN_YEAR} and {MAX_YEAR})",
                type=click.IntRange(MIN_YEAR, MAX_YEAR),
            )

            semester = Semester(label=semester_label, year=semester_year)

            db.session.add(semester)

            adminRole = user_datastore.create_role(name="admin")
            user_datastore.create_role(name="assistant")

            box("The first admin account will be created now.")

            admin_email = click.prompt(
                "Enter the admin's email address",
                type=EmailParamType(),
            )

            admin_first_name = click.prompt("Enter the admin's first name")
            admin_last_name = click.prompt("Enter the admin's last name")
            admin_phone_number = click.prompt(
                "Enter the admin's phone number (optional)", default="", show_default=False
            )
            admin_mobile_phone_number = click.prompt(
                "Enter the admin's mobile phone number (optional)", default="", show_default=False
            )
            admin_building = click.prompt("Enter the admin's building (optional)", default="", show_default=False)
            admin_room = click.prompt("Enter the admin's room (optional)", default="", show_default=False)

            admin_password = randomPassword()
            admin_hashed_password = hash_password(admin_password)

            admin_user = user_datastore.create_user(
                email=admin_email,
                password=admin_hashed_password,
                roles=[adminRole],
                first_name=admin_first_name.strip(),
                last_name=admin_last_name.strip(),
                phone_number=admin_phone_number.strip() or None,
                mobile_phone_number=admin_mobile_phone_number.strip() or None,
                building=admin_building.strip() or None,
                room=admin_room.strip() or None,
                active_semester=semester,
            )

            admin = Admin(user=admin_user)

            db.session.add(admin)

    box(f"Admin password: {admin_password}")

    click.echo(click.style("Done database initialization!", fg="green"))


@cli.group(
    short_help="Maintenance commands.",
    help="Commands used to maintain an AdvLabDB instance.",
)
def maintain():
    pass


@maintain.command(
    short_help="Reset the password of an admin.",
    help="Reset the password of a chosen active admin. A random password will be generated. If no admins are active, a chosen admin will be activated.",
)
def reset_admin_password():
    click.echo("This script will generate a new random password for a chosen admin.\n")

    app = create_app(create_for_server=False)

    with app.app_context():
        with db.session.begin():
            admins = db.session.execute(select(Admin).join(User).where(User.active == True)).scalars().all()
            activate_user = False

            if len(admins) == 0:
                click.echo("There is no admin with an active user. The user of the chosen admin will be activated.")
                admins = db.session.execute(select(Admin)).scalars().all()
                activate_user = True

            num_admins = len(admins)

            prompt = "Admins:\n"
            for ind, admin in enumerate(admins):
                user = admin.user
                prompt += f"[{ind}] {user.first_name} {user.last_name}: {user.email}\n"
            prompt += f"Enter number [0-{num_admins - 1}]"

            admin_index = click.prompt(
                prompt,
                type=click.IntRange(0, num_admins - 1),
            )

            chosen_admin_user = admins[admin_index].user

            new_password = randomPassword()

            admin_change_password(
                chosen_admin_user, new_password, notify=False
            )  # Password is automatically hashed with this function

            if activate_user:
                chosen_admin_user.active = True

    box(f"New password: {new_password}")

    click.echo(click.style("Done!", fg="green"))


@maintain.command(
    short_help="Copy admin templates",
    help="Copy the templates from the Flask-Admin package. This is only needed if the templates should be updated to a new version after a new release of Flask-Admin.",
)
def copy_admin_templates():
    src = Path(flask_admin_path).parent / "templates/bootstrap4/admin"
    if not src.is_dir():
        click.echo(click.style(f"Templates could not be found at {src}", fg="red"))
        return

    dist = Path("advlabdb/templates/admin")
    if dist.is_dir():
        if not click.confirm(
            click.style(f"The directory {dist} already exists! Do you want to overwrite it?", fg="yellow")
        ):
            return

        rmtree(dist)
        click.echo(click.style("Old templates deleted!", fg="yellow"))

    copytree(src, dist)
    click.echo(click.style(f"Copied {src} -> {dist}", fg="green"))

    click.echo(
        click.style(
            f"""
_________
| WARNING
| -------
| You might have to edit the file {dist}/base.html
| by adding nav in the following way:
| This line:\t<ul class="navbar-nav mr-auto">
| Becomes:\t<ul class="nav navbar-nav mr-auto">
|
| This will prevent the navigation bar from expanding
| such that some elements can not be seen.
| Refer to this pull request:
| https://github.com/flask-admin/flask-admin/pull/2233
|
| If the above pull request is merged and flask-admin
| is on a new release after the merge,
| then this step is not needed.
_________
        """,
            fg="yellow",
        )
    )


@cli.group(
    short_help="Test commands.",
    help="Commands used to test AdvLabDB.",
)
def test():
    pass


@test.command(
    short_help="Generate test database.",
    help="Generate a test database if no database already exists.",
)
def generate_test_db():
    db_file = Path(settings["SQLITE_DB_PATH"])
    if db_file.is_file():
        click.echo(
            click.style(
                f"Generating a test database is not allowed because a database does already exist at {db_file}.",
                fg="red",
            )
        )
        return

    app = create_app(create_for_server=False)

    with app.app_context():
        with db.session.begin():
            db.create_all()

            bs_prog = db_add(Program(label="BS"))
            ms_prog = db_add(Program(label="MS"))
            be_prog = db_add(Program(label="BE"))
            programs = (bs_prog, ms_prog, be_prog)

            ss = db_add(Semester(label="SS", year=23))
            ws = db_add(Semester(label="WS", year=23))
            semesters = (ss, ws)

            bs_1_ss_part = db_add(Part(semester=ss, program=bs_prog, number=1))
            bs_2_ss_part = db_add(Part(semester=ss, program=bs_prog, number=2))
            ms_1_ss_part = db_add(Part(semester=ss, program=ms_prog, number=1))
            ms_2_ss_part = db_add(Part(semester=ss, program=ms_prog, number=2))
            be_1_ss_part = db_add(Part(semester=ss, program=be_prog, number=1))
            be_2_ss_part = db_add(Part(semester=ss, program=be_prog, number=2))
            ss_parts = (bs_1_ss_part, bs_2_ss_part, ms_1_ss_part, ms_2_ss_part, be_1_ss_part, be_2_ss_part)

            bs_1_ws_part = db_add(Part(semester=ws, program=bs_prog, number=1))
            bs_2_ws_part = db_add(Part(semester=ws, program=bs_prog, number=2))
            ms_1_ws_part = db_add(Part(semester=ws, program=ms_prog, number=1))
            ms_2_ws_part = db_add(Part(semester=ws, program=ms_prog, number=2))
            be_1_ws_part = db_add(Part(semester=ws, program=be_prog, number=1))
            be_2_ws_part = db_add(Part(semester=ws, program=be_prog, number=2))

            semester_program_part_students = {
                ss: {program: [] for program in programs},
                ws: {program: [] for program in programs},
            }

            def add_part_student(student, part):
                part_student = db_add(PartStudent(student=student, part=part))
                semester_program_part_students[part.semester][part.program].append(part_student)

            for ind, name in enumerate(student_names):
                if randint(0, 1) == 0:
                    contact_email = f"{name[0]}-{name[1]}@private.de".lower()
                else:
                    contact_email = None

                student = db_add(
                    Student(
                        student_number=ind,
                        first_name=name[0],
                        last_name=name[1],
                        uni_email=f"{name[0]}-{name[1]}@uni.de".lower(),
                        contact_email=contact_email,
                    )
                )

                part = ss_parts[ind % len(ss_parts)]
                add_part_student(student, part)

                if random() < 0.9:
                    # Transfer to the next part in the second semester
                    if part == bs_1_ss_part:
                        add_part_student(student, bs_2_ws_part)
                    elif part == bs_2_ss_part:
                        add_part_student(student, ms_1_ws_part)
                    elif part == ms_1_ss_part:
                        add_part_student(student, ms_2_ws_part)
                    elif part == be_1_ss_part:
                        add_part_student(student, be_2_ws_part)

            program_groups = {program: [] for program in programs}
            for semester, program_part_students in semester_program_part_students.items():
                for program, part_students in program_part_students.items():
                    if len(part_students) % 2 == 1:
                        # Add the first 3 students into a special group for an uneven number of students
                        group_part_students = []
                        for i in range(3):
                            if len(part_students) == 0:
                                break

                            group_part_students.append(part_students.pop(0))

                        group = db_add(Group.customInit(group_part_students))
                        program_groups[program].append(group)

                    while len(part_students) >= 2:
                        # Add the rest of the students into groups of 2
                        group = db_add(Group.customInit([part_students.pop(0) for i in range(2)]))
                        program_groups[program].append(group)

            program_semester_experiments = {program: [] for program in programs}
            all_semester_experiments = []
            for ind, title in enumerate(experiment_titles):
                program = programs[ind % len(programs)]

                experiment = db_add(
                    Experiment(
                        number=ind + 1,
                        program=program,
                        title=title,
                        building="Not assigned",
                        room="Not assigned",
                        duration_in_days=2,
                    )
                )

                for semester in semesters:
                    semester_experiment = db_add(SemesterExperiment(experiment=experiment, semester=semester))
                    program_semester_experiments[program].append(semester_experiment)
                    all_semester_experiments.append(semester_experiment)

            all_group_experiments = []
            for program in programs:
                semester_experiments = program_semester_experiments[program]
                num_semester_experiments = len(semester_experiments)

                for ind, group in enumerate(program_groups[program]):
                    num_tries = 0
                    while True:
                        try:
                            semester_experiment = semester_experiments[ind % num_semester_experiments]
                            group_experiment = db_add(
                                GroupExperiment(semester_experiment=semester_experiment, group=group)
                            )
                        except DatabaseException as ex:
                            # Catch an error when a student becomes the same experiment for the second time.
                            # Try the next experiment!
                            ind += 1
                            num_tries += 1
                            if num_tries == num_semester_experiments:
                                raise ex
                        else:
                            break

                    all_group_experiments.append(group_experiment)

            adminRole = user_datastore.create_role(name="admin")
            assistantRole = user_datastore.create_role(name="assistant")

            admin_names = (
                ("Aileen", "Grant"),
                ("Ben", "Huber"),
            )
            for name in admin_names:
                user = user_datastore.create_user(
                    email=f"{name[0]}-{name[1]}@uni.de".lower(),
                    password=hash_password("admin"),
                    roles=[adminRole],
                    first_name=name[0],
                    last_name=name[1],
                    active_semester=ws,
                )

                db_add(Admin(user=user))

            num_assistants = len(assistant_names)
            num_assistant_experiments = ceil(len(all_semester_experiments) / num_assistants)

            for name in assistant_names:
                user = user_datastore.create_user(
                    email=f"{name[0]}-{name[1]}@uni.de".lower(),
                    password=hash_password("assistant"),
                    roles=[assistantRole],
                    first_name=name[0],
                    last_name=name[1],
                    mobile_phone_number="01" + "".join(str(randint(0, 9)) for i in range(10)),
                    active_semester=ws,
                )

                semester_experiments = []
                for i in range(num_assistant_experiments):
                    if len(all_semester_experiments) == 0:
                        break

                    semester_experiments.append(all_semester_experiments.pop(0))

                db_add(Assistant(user=user, semester_experiments=semester_experiments))

            for group_experiment in all_group_experiments:
                semester_experiment = group_experiment.semester_experiment
                special = False
                semester = semester_experiment.semester
                if semester.label == "SS":
                    month = randint(3, 8)
                    if month <= 4:
                        special = True
                else:
                    month = randint(9, 12)
                    if month <= 10:
                        special = True

                year = 2000 + semester.year
                day = randint(1, 28)
                for appointment_date in (date(year, month, day), date(year, month, day + 1)):
                    db_add(
                        Appointment(
                            date=appointment_date,
                            special=special,
                            group_experiment=group_experiment,
                            assistant=semester_experiment.assistants[0],
                        )
                    )


if __name__ == "__main__":
    cli()