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# -*- coding: utf-8 -*-
import os
import random
from flask import render_template, flash, redirect, url_for, current_app
from werkzeug.utils import secure_filename
from app import db
from app.admin import bp
from app.admin.datasets import get_name_from_dataset, md5sum
from app.decorators import admin_required
from app.admin.forms import (
AdminAutoAssignForm,
AdminManageTaskForm,
AdminAddDatasetForm,
AdminManageDatasetsForm,
)
from app.models import User, Dataset, Task, Annotation
@bp.route("/manage/tasks", methods=("GET", "POST"))
@admin_required
def manage_tasks():
form_auto = AdminAutoAssignForm()
user_list = [(u.id, u.username) for u in User.query.all()]
dataset_list = [
(d.id, d.name) for d in Dataset.query.order_by(Dataset.name).all()
]
form_manual = AdminManageTaskForm()
form_manual.username.choices = user_list
form_manual.dataset.choices = dataset_list
if form_auto.validate_on_submit() and form_auto.assign.data:
max_per_user = form_auto.max_per_user.data
num_per_dataset = form_auto.num_per_dataset.data
available_users = {}
for user in User.query.all():
user_tasks = Task.query.filter_by(annotator_id=user.id).all()
if len(user_tasks) < max_per_user:
available_users[user] = max_per_user - len(user_tasks)
if not available_users:
flash(
"All users already have at least %i tasks assigned to them."
% max_per_user,
"error",
)
return redirect(url_for("admin.manage_tasks"))
datasets_tbd = {}
for dataset in Dataset.query.all():
dataset_tasks = Task.query.filter_by(dataset_id=dataset.id).all()
if len(dataset_tasks) < num_per_dataset:
datasets_tbd[dataset] = num_per_dataset - len(dataset_tasks)
if not datasets_tbd:
flash(
"All datasets have at least the desired number (%i) of assigned tasks."
% num_per_dataset,
"info",
)
return redirect(url_for("admin.manage_tasks"))
datasets = list(datasets_tbd.keys())
random.shuffle(datasets)
for dataset in datasets:
available = [u for u, v in available_users.items() if v > 0]
tbd = min(len(available), datasets_tbd[dataset])
selected_users = random.sample(available, tbd)
for user in selected_users:
task = Task(annotator_id=user.id, dataset_id=dataset.id)
db.session.add(task)
db.session.commit()
available_users[user] -= 1
datasets_tbd[dataset] -= 1
if any((datasets_tbd[d] > 0 for d in datasets)):
flash(
"Insufficient users available for the desired number of tasks per dataset.",
"info",
)
flash("Automatic task assignment successful.", "success")
elif form_manual.validate_on_submit():
user = User.query.filter_by(id=form_manual.username.data).first()
if user is None:
flash("User does not exist.", "error")
return redirect(url_for("admin.manage_tasks"))
dataset = Dataset.query.filter_by(id=form_manual.dataset.data).first()
if dataset is None:
flash("Dataset does not exist.", "error")
return redirect(url_for("admin.manage_tasks"))
action = None
if form_manual.assign.data:
action = "assign"
elif form_manual.delete.data:
action = "delete"
else:
flash(
"Internal error: no button is true but form_manual was submitted.",
"error",
)
return redirect(url_for("admin.manage_tasks"))
task = Task.query.filter_by(
annotator_id=user.id, dataset_id=dataset.id
).first()
if task is None:
if action == "delete":
flash("Can't delete a task that doesn't exist.", "error")
return redirect(url_for("admin.manage_tasks"))
else:
task = Task(annotator_id=user.id, dataset_id=dataset.id)
db.session.add(task)
db.session.commit()
flash("Task registered successfully.", "success")
else:
if action == "assign":
flash("Task assignment already exists.", "error")
return redirect(url_for("admin.manage_tasks"))
else:
# delete annotations too
for ann in Annotation.query.filter_by(task_id=task.id).all():
db.session.delete(ann)
db.session.delete(task)
db.session.commit()
flash("Task deleted successfully.", "success")
tasks = (
Task.query.join(User, Task.user)
.join(Dataset, Task.dataset)
.order_by(Dataset.name, User.username)
.all()
)
return render_template(
"admin/manage.html",
title="Assign Task",
form_auto=form_auto,
form_manual=form_manual,
tasks=tasks,
)
@bp.route("/manage/users", methods=("GET", "POST"))
@admin_required
def manage_users():
users = User.query.all()
return render_template(
"admin/manage_users.html", title="Manage Users", users=users
)
@bp.route("/manage/datasets", methods=("GET", "POST"))
@admin_required
def manage_datasets():
dataset_list = [(d.id, d.name) for d in Dataset.query.all()]
form = AdminManageDatasetsForm()
form.dataset.choices = dataset_list
if form.validate_on_submit():
dataset = Dataset.query.filter_by(id=form.dataset.data).first()
if dataset is None:
flash("Dataset doesn't exist.", "error")
return redirect(url_for("admin.manage_datasets"))
dataset_dir = os.path.join(
current_app.instance_path, current_app.config["DATASET_DIR"]
)
filename = os.path.join(dataset_dir, dataset.name + ".json")
if not os.path.exists(filename):
flash("Internal error: dataset file doesn't exist!", "error")
return redirect(url_for("admin.manage_datasets"))
tasks = Task.query.filter_by(dataset_id=dataset.id).all()
for task in tasks:
for ann in Annotation.query.filter_by(task_id=task.id).all():
db.session.delete(ann)
db.session.delete(task)
db.session.delete(dataset)
db.session.commit()
os.unlink(filename)
flash("Dataset deleted successfully.", "success")
overview = []
for dataset in Dataset.query.all():
tasks = Task.query.filter_by(dataset_id=dataset.id).all()
n_complete = len([t for t in tasks if t.done])
perc = n_complete / len(tasks) * 100
entry = {
"id": dataset.id,
"name": dataset.name,
"assigned": len(tasks),
"completed": n_complete,
"percentage": perc,
}
overview.append(entry)
return render_template(
"admin/manage_datasets.html",
title="Manage Datasets",
overview=overview,
form=form,
)
@bp.route("/add", methods=("GET", "POST"))
@admin_required
def add_dataset():
tmp_dir = os.path.join(
current_app.instance_path, current_app.config["TEMP_DIR"]
)
dataset_dir = os.path.join(
current_app.instance_path, current_app.config["DATASET_DIR"]
)
form = AdminAddDatasetForm()
if form.validate_on_submit():
temp_filename = os.path.join(
tmp_dir, secure_filename(form.file_.data.filename)
)
if not os.path.exists(temp_filename):
flash("Internal error: temporary dataset disappeared.", "error")
return redirect(url_for("admin.add_dataset"))
name = get_name_from_dataset(temp_filename)
target_filename = os.path.join(dataset_dir, name + ".json")
if os.path.exists(target_filename):
flash("Internal error: file already exists!", "error")
return redirect(url_for("admin.add_dataset"))
os.rename(temp_filename, target_filename)
if not os.path.exists(target_filename):
flash("Internal error: file moving failed", "error")
return redirect(url_for("admin.add_dataset"))
dataset = Dataset(name=name, md5sum=md5sum(target_filename))
db.session.add(dataset)
db.session.commit()
flash("Dataset %r added successfully." % name, "success")
return redirect(url_for("admin.add_dataset"))
return render_template("admin/add.html", title="Add Dataset", form=form)
@bp.route("/annotations", methods=("GET",))
@admin_required
def view_annotations():
annotations = (
Annotation.query.join(Task, Annotation.task)
.join(User, Task.user)
.join(Dataset, Task.dataset)
.order_by(Dataset.name, User.username, Annotation.cp_index)
.all()
)
return render_template(
"admin/annotations.html",
title="View Annotations",
annotations=annotations,
)
@bp.route("/", methods=("GET",))
@admin_required
def index():
return render_template("admin/index.html", title="Admin Home")
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