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routes.py
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routes.py
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import datetime
import json
import os.path
from datetime import timedelta
from flask import (
make_response,
render_template,
request,
jsonify,
current_app,
url_for,
send_from_directory,
after_this_request,
)
import pathlib
import shutil
from werkzeug.utils import secure_filename, redirect
from app.classes import CSMentor, CSMentee
from app.extensions import celery_app
from app.main import main_bp
from app.helpers import valid_files, random_string
from app.tasks.tasks import (
async_process_data,
delete_mailing_lists_after_period,
)
from app.tasks.helpers import most_mentees_with_at_least_one_mentor
from matching.process import create_participant_list_from_path, create_mailing_list
@main_bp.route("/", methods=["GET"])
def index():
return render_template("index.html", title="Mentor matcher")
@main_bp.route("/cookies")
def cookies():
return render_template("cookies.html", title="Cookies")
@main_bp.route("/privacy-and-data")
def privacy():
return render_template("privacy-and-data.html", title="Privacy and data")
@main_bp.route("/upload", methods=["GET", "POST"])
def upload():
if request.method == "GET":
return render_template("input.html")
if request.method == "POST":
files = request.files.getlist("files")
filenames = [file.filename for file in files]
if len(files) == 2 and valid_files(filenames):
folder = random_string()
for file in files:
pathlib.Path(current_app.config["UPLOAD_FOLDER"], folder).mkdir(
parents=True, exist_ok=True
)
filename = secure_filename(file.filename)
file.save(
os.path.join(current_app.config["UPLOAD_FOLDER"], folder, filename)
)
response = make_response(redirect(url_for("main.process")))
response.set_cookie(
"data-folder",
folder,
expires=datetime.datetime.now() + timedelta(minutes=30),
)
return response
else:
if len(files) != 2:
error_message = (
"Number of files is incorrect. Please only upload two files."
)
elif not valid_files(filenames):
error_message = (
"Your filenames are incorrect. Please label your files as"
" 'mentees.csv' and 'mentors.csv'."
)
else:
error_message = "Unspecified error. Please contact the admin team"
return make_response(
render_template("input.html", error_message=error_message), 415
)
@main_bp.route("/download/<task_id>", methods=["GET", "POST"])
def download(task_id):
@after_this_request
def delete_files(response):
period = int(os.getenv("DATA_STORAGE_PERIOD_SECS", 900))
delete_mailing_lists_after_period.apply_async(
(task_id,), eta=datetime.datetime.now() + timedelta(seconds=period)
)
return response
if request.method == "GET":
count_data = json.loads(request.args.to_dict().get("count_data"))
return render_template(
"output.html",
title="Download matches",
data_folder=task_id,
overview=count_data,
)
elif request.method == "POST":
# we'll ask if the user wants to go again?
pass
@main_bp.route("/tasks", methods=["POST"])
def run_task():
"""
This route only accepts JSON encoded requests
"""
current_app.logger.debug(request.get_json())
data_folder = request.get_json()["data_folder"]
try:
optimise_for_pairing = request.get_json()["pairing"]
except KeyError:
optimise_for_pairing = False
folder = pathlib.Path(
os.path.join(current_app.config["UPLOAD_FOLDER"], data_folder)
)
@after_this_request
def delete_upload(response):
shutil.rmtree(folder)
return response
mentors = create_participant_list_from_path(
CSMentor,
path_to_data=folder,
)
mentees = create_participant_list_from_path(
CSMentee,
path_to_data=folder,
)
if optimise_for_pairing:
task = most_mentees_with_at_least_one_mentor(mentors, mentees)
else:
task = async_process_data.delay(mentors, mentees)
return jsonify(task_id=task.id), 202
@main_bp.route("/tasks/status/<task_id>", methods=["GET"])
def get_status(task_id):
"""
This route checks the status of the long-running celery task. Once the task is complete it returns the
matched participants as JSON formatted data. This data is then fed into the `create_mailing_list` function,
where the mailing lists are saved to a folder that corresponds to the `task_id`.
"""
task_result = celery_app.AsyncResult(task_id)
result = {
"task_id": task_id,
"task_status": task_result.status,
"task_result": "processing",
}
if task_result.ready():
outputs = {}
for participants in task_result.result[:2]:
participant_class = participants[0].class_name()
connections = [len(p.connections) for p in participants]
outputs[participant_class] = {
f"{i}_matches": connections.count(i) for i in range(4)
}
create_mailing_list(
participants,
pathlib.Path(
os.path.join(current_app.config["UPLOAD_FOLDER"], task_id)
),
)
result["task_result"] = url_for(
"main.download", task_id=task_id, count_data=json.dumps(outputs)
)
return result, 200
@main_bp.route("/tasks/<task_id>", methods=["GET", "DELETE"])
def tasks(task_id):
"""
This does two things:
on GET: the data in the path `pathlib.Path(current_app.config["UPLOAD_FOLDER"], task_id)` is zipped and served to
the user. Following this request, the data and the zipped data are deleted.
on DELETE: the server attempts to delete the data in the path
`pathlib.Path(current_app.config["UPLOAD_FOLDER"], task_id) and returns either a 202 if successful or a 404 if the
file doesn't exist
:param task_id:
:return:
"""
if request.method == "GET":
@after_this_request
def remove_files(response):
shutil.rmtree(pathlib.Path(current_app.config["UPLOAD_FOLDER"], task_id))
os.remove(
pathlib.Path(current_app.config["UPLOAD_FOLDER"], f"{task_id}.zip")
)
return response
data_path = pathlib.Path(current_app.config["UPLOAD_FOLDER"], task_id)
current_app.logger.debug(data_path)
shutil.make_archive(
base_name=data_path,
format="zip",
root_dir=data_path,
)
return send_from_directory(
directory=pathlib.Path(current_app.config["UPLOAD_FOLDER"]),
path=f"{task_id}.zip",
)
elif request.method == "DELETE":
try:
shutil.rmtree(pathlib.Path(current_app.config["UPLOAD_FOLDER"], task_id))
status_code = 202
except FileNotFoundError:
status_code = 404
return jsonify(), status_code
@main_bp.route("/process", methods=["GET"])
def process():
data_folder = request.cookies.get("data-folder")
if not data_folder:
return redirect(url_for("main.upload"))
else:
return render_template("process.html", data_folder=data_folder)
@main_bp.route("/finished", methods=["GET"])
def finished():
return render_template("done.html")