Python script, ASCII text executable
1
from datetime import datetime
2
from email.policy import default
3
import flask
5
from flask_sqlalchemy import SQLAlchemy
6
from flask_bcrypt import Bcrypt
7
from flask_httpauth import HTTPBasicAuth
8
from markupsafe import escape, Markup
9
from flask_migrate import Migrate, current
10
from jinja2_fragments.flask import render_block
11
from sqlalchemy.orm import backref
12
import sqlalchemy.dialects.postgresql
13
from os import path
14
import mimetypes
15
from PIL import Image
17
import config
19
import markdown
20
app = flask.Flask(__name__)
23
bcrypt = Bcrypt(app)
24
app.config["SQLALCHEMY_DATABASE_URI"] = config.DB_URI
27
app.config["SECRET_KEY"] = config.DB_PASSWORD
28
db = SQLAlchemy(app)
31
migrate = Migrate(app, db)
32
@app.template_filter("split")
35
def split(value, separator=None, maxsplit=-1):
36
return value.split(separator, maxsplit)
37
@app.template_filter("median")
40
def median(value):
41
value = list(value) # prevent generators
42
return sorted(value)[len(value) // 2]
43
with app.app_context():
47
class User(db.Model):
48
username = db.Column(db.String(32), unique=True, nullable=False, primary_key=True)
49
password_hashed = db.Column(db.String(60), nullable=False)
50
admin = db.Column(db.Boolean, nullable=False, default=False, server_default="false")
51
pictures = db.relationship("PictureResource", back_populates="author")
52
def __init__(self, username, password):
54
self.username = username
55
self.password_hashed = bcrypt.generate_password_hash(password).decode("utf-8")
56
class Licence(db.Model):
59
id = db.Column(db.String(64), primary_key=True) # SPDX identifier
60
title = db.Column(db.UnicodeText, nullable=False) # the official name of the licence
61
description = db.Column(db.UnicodeText, nullable=False) # brief description of its permissions and restrictions
62
legal_text = db.Column(db.UnicodeText, nullable=False) # the full legal text of the licence
63
url = db.Column(db.String(1024), nullable=True) # the URL to a page with the full text of the licence and more information
64
pictures = db.relationship("PictureLicence", back_populates="licence")
65
free = db.Column(db.Boolean, nullable=False, default=False) # whether the licence is free or not
66
logo_url = db.Column(db.String(1024), nullable=True) # URL to the logo of the licence
67
pinned = db.Column(db.Boolean, nullable=False, default=False) # whether the licence should be shown at the top of the list
68
def __init__(self, id, title, description, legal_text, url, free, logo_url=None, pinned=False):
70
self.id = id
71
self.title = title
72
self.description = description
73
self.legal_text = legal_text
74
self.url = url
75
self.free = free
76
self.logo_url = logo_url
77
self.pinned = pinned
78
class PictureLicence(db.Model):
81
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
82
resource_id = db.Column(db.Integer, db.ForeignKey("picture_resource.id"))
84
licence_id = db.Column(db.String(32), db.ForeignKey("licence.id"))
85
resource = db.relationship("PictureResource", back_populates="licences")
87
licence = db.relationship("Licence", back_populates="pictures")
88
def __init__(self, resource_id, licence_id):
90
self.resource_id = resource_id
91
self.licence_id = licence_id
92
class Resource(db.Model):
95
__abstract__ = True
96
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
98
title = db.Column(db.UnicodeText, nullable=False)
99
description = db.Column(db.UnicodeText, nullable=False)
100
timestamp = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)
101
origin_url = db.Column(db.String(2048), nullable=True) # should be left empty if it's original or the source is unknown but public domain
102
class PictureNature(db.Model):
105
# Examples:
106
# "photo", "paper-scan", "2d-art-photo", "sculpture-photo", "computer-3d", "computer-painting",
107
# "computer-line-art", "diagram", "infographic", "text", "map", "chart-graph", "screen-capture",
108
# "screen-photo", "pattern", "collage", "ai", and so on
109
id = db.Column(db.String(64), primary_key=True)
110
description = db.Column(db.UnicodeText, nullable=False)
111
resources = db.relationship("PictureResource", back_populates="nature")
112
def __init__(self, id, description):
114
self.id = id
115
self.description = description
116
class PictureObjectInheritance(db.Model):
119
parent_id = db.Column(db.String(64), db.ForeignKey("picture_object.id"),
120
primary_key=True)
121
child_id = db.Column(db.String(64), db.ForeignKey("picture_object.id"),
122
primary_key=True)
123
parent = db.relationship("PictureObject", foreign_keys=[parent_id],
125
back_populates="child_links")
126
child = db.relationship("PictureObject", foreign_keys=[child_id],
127
back_populates="parent_links")
128
def __init__(self, parent, child):
130
self.parent = parent
131
self.child = child
132
class PictureObject(db.Model):
135
id = db.Column(db.String(64), primary_key=True)
136
description = db.Column(db.UnicodeText, nullable=False)
137
child_links = db.relationship("PictureObjectInheritance",
139
foreign_keys=[PictureObjectInheritance.parent_id],
140
back_populates="parent")
141
parent_links = db.relationship("PictureObjectInheritance",
142
foreign_keys=[PictureObjectInheritance.child_id],
143
back_populates="child")
144
def __init__(self, id, description):
146
self.id = id
147
self.description = description
148
class PictureRegion(db.Model):
151
# This is for picture region annotations
152
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
153
json = db.Column(sqlalchemy.dialects.postgresql.JSONB, nullable=False)
154
resource_id = db.Column(db.Integer, db.ForeignKey("picture_resource.id"), nullable=False)
156
object_id = db.Column(db.String(64), db.ForeignKey("picture_object.id"), nullable=True)
157
resource = db.relationship("PictureResource", backref="regions")
159
object = db.relationship("PictureObject", backref="regions")
160
def __init__(self, json, resource, object):
162
self.json = json
163
self.resource = resource
164
self.object = object
165
class PictureResource(Resource):
168
# This is only for bitmap pictures. Vectors will be stored under a different model
169
# File name is the ID in the picture directory under data, without an extension
170
file_format = db.Column(db.String(64), nullable=False) # MIME type
171
width = db.Column(db.Integer, nullable=False)
172
height = db.Column(db.Integer, nullable=False)
173
nature_id = db.Column(db.String(32), db.ForeignKey("picture_nature.id"), nullable=True)
174
author_name = db.Column(db.String(32), db.ForeignKey("user.username"), nullable=False)
175
author = db.relationship("User", back_populates="pictures")
176
nature = db.relationship("PictureNature", back_populates="resources")
178
replaces_id = db.Column(db.Integer, db.ForeignKey("picture_resource.id"), nullable=True)
180
replaced_by_id = db.Column(db.Integer, db.ForeignKey("picture_resource.id"),
181
nullable=True)
182
replaces = db.relationship("PictureResource", remote_side="PictureResource.id",
184
foreign_keys=[replaces_id], back_populates="replaced_by")
185
replaced_by = db.relationship("PictureResource", remote_side="PictureResource.id",
186
foreign_keys=[replaced_by_id])
187
licences = db.relationship("PictureLicence", back_populates="resource")
189
def __init__(self, title, author, description, origin_url, licence_ids, mime, nature=None,
191
replaces=None):
192
self.title = title
193
self.author = author
194
self.description = description
195
self.origin_url = origin_url
196
self.file_format = mime
197
self.width = self.height = 0
198
self.nature = nature
199
db.session.add(self)
200
db.session.commit()
201
for licence_id in licence_ids:
202
joiner = PictureLicence(self.id, licence_id)
203
db.session.add(joiner)
204
if replaces is not None:
205
self.replaces = replaces
206
replaces.replaced_by = self
207
@app.route("/")
210
def index():
211
return flask.render_template("home.html")
212
@app.route("/accounts/")
215
def accounts():
216
return flask.render_template("login.html")
217
@app.route("/login", methods=["POST"])
220
def login():
221
username = flask.request.form["username"]
222
password = flask.request.form["password"]
223
user = db.session.get(User, username)
225
if user is None:
227
flask.flash("This username is not registered.")
228
return flask.redirect("/accounts")
229
if not bcrypt.check_password_hash(user.password_hashed, password):
231
flask.flash("Incorrect password.")
232
return flask.redirect("/accounts")
233
flask.flash("You have been logged in.")
235
flask.session["username"] = username
237
return flask.redirect("/")
238
@app.route("/logout")
241
def logout():
242
flask.session.pop("username", None)
243
flask.flash("You have been logged out.")
244
return flask.redirect("/")
245
@app.route("/signup", methods=["POST"])
248
def signup():
249
username = flask.request.form["username"]
250
password = flask.request.form["password"]
251
if db.session.get(User, username) is not None:
253
flask.flash("This username is already taken.")
254
return flask.redirect("/accounts")
255
if set(username) > set("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_"):
257
flask.flash("Usernames can only contain the Latin alphabet, digits, hyphens, and underscores.")
258
return flask.redirect("/accounts")
259
if len(username) < 3 or len(username) > 32:
261
flask.flash("Usernames must be between 3 and 32 characters long.")
262
return flask.redirect("/accounts")
263
if len(password) < 6:
265
flask.flash("Passwords must be at least 6 characters long.")
266
return flask.redirect("/accounts")
267
user = User(username, password)
269
db.session.add(user)
270
db.session.commit()
271
flask.session["username"] = username
273
flask.flash("You have been registered and logged in.")
275
return flask.redirect("/")
277
@app.route("/profile", defaults={"username": None})
280
@app.route("/profile/<username>")
281
def profile(username):
282
if username is None:
283
if "username" in flask.session:
284
return flask.redirect("/profile/" + flask.session["username"])
285
else:
286
flask.flash("Please log in to perform this action.")
287
return flask.redirect("/accounts")
288
user = db.session.get(User, username)
290
if user is None:
291
flask.abort(404)
292
return flask.render_template("profile.html", user=user)
294
@app.route("/upload")
297
def upload():
298
if "username" not in flask.session:
299
flask.flash("Log in to upload pictures.")
300
return flask.redirect("/accounts")
301
licences = Licence.query.order_by(Licence.free.desc(), Licence.pinned.desc(), Licence.title).all()
303
return flask.render_template("upload.html", licences=licences)
304
@app.route("/upload", methods=["POST"])
307
def upload_post():
308
title = flask.request.form["title"]
309
description = flask.request.form["description"]
310
origin_url = flask.request.form["origin_url"]
311
author = db.session.get(User, flask.session.get("username"))
312
licence_ids = flask.request.form.getlist("licence")
313
if author is None:
315
flask.abort(401)
316
file = flask.request.files["file"]
318
if not file or not file.filename:
320
flask.flash("Select a file")
321
return flask.redirect(flask.request.url)
322
if not file.mimetype.startswith("image/"):
324
flask.flash("Only images are supported")
325
return flask.redirect(flask.request.url)
326
if not title:
328
flask.flash("Enter a title")
329
return flask.redirect(flask.request.url)
330
if not description:
332
flask.flash("Enter a description")
333
return flask.redirect(flask.request.url)
334
print(licence_ids)
336
if not licence_ids:
338
flask.flash("Select licences")
339
return flask.redirect(flask.request.url)
340
licences = [db.session.get(Licence, licence_id) for licence_id in licence_ids]
342
if not any(licence.free for licence in licences):
343
flask.flash("Select at least one free licence")
344
return flask.redirect(flask.request.url)
345
resource = PictureResource(title, author, description, origin_url, ["CC0-1.0"], file.mimetype)
347
db.session.add(resource)
348
db.session.commit()
349
file.save(path.join(config.DATA_PATH, "pictures", str(resource.id)))
350
flask.flash("Picture uploaded successfully")
352
return flask.redirect("/picture/" + str(resource.id))
354
@app.route("/picture/<int:id>/")
357
def picture(id):
358
resource = db.session.get(PictureResource, id)
359
if resource is None:
360
flask.abort(404)
361
image = Image.open(path.join(config.DATA_PATH, "pictures", str(resource.id)))
363
return flask.render_template("picture.html", resource=resource,
365
file_extension=mimetypes.guess_extension(resource.file_format),
366
size=image.size)
367
@app.route("/picture/<int:id>/annotate")
371
def annotate_picture(id):
372
resource = db.session.get(PictureResource, id)
373
current_user = db.session.get(User, flask.session.get("username"))
374
if current_user is None:
375
flask.abort(401)
376
if resource.author != current_user and not current_user.admin:
377
flask.abort(403)
378
if resource is None:
380
flask.abort(404)
381
return flask.render_template("picture-annotation.html", resource=resource,
383
file_extension=mimetypes.guess_extension(resource.file_format))
384
@app.route("/picture/<int:id>/save-annotations", methods=["POST"])
387
def save_annotations(id):
388
resource = db.session.get(PictureResource, id)
389
if resource is None:
390
flask.abort(404)
391
current_user = db.session.get(User, flask.session.get("username"))
393
if resource.author != current_user and not current_user.admin:
394
flask.abort(403)
395
# Delete all previous annotations
397
db.session.query(PictureRegion).filter_by(resource_id=id).delete()
398
json = flask.request.json
400
for region in json:
401
object_id = region["object"]
402
picture_object = db.session.get(PictureObject, object_id)
403
region_data = {
405
"type": region["type"],
406
"shape": region["shape"],
407
}
408
region_row = PictureRegion(region_data, resource, picture_object)
410
db.session.add(region_row)
411
db.session.commit()
414
response = flask.make_response()
416
response.status_code = 204
417
return response
418
@app.route("/picture/<int:id>/get-annotations")
421
def get_annotations(id):
422
resource = db.session.get(PictureResource, id)
423
if resource is None:
424
flask.abort(404)
425
regions = db.session.query(PictureRegion).filter_by(resource_id=id).all()
427
regions_json = []
429
for region in regions:
431
regions_json.append({
432
"object": region.object_id,
433
"type": region.json["type"],
434
"shape": region.json["shape"],
435
})
436
return flask.jsonify(regions_json)
438
@app.route("/raw/picture/<int:id>")
441
def raw_picture(id):
442
resource = db.session.get(PictureResource, id)
443
if resource is None:
444
flask.abort(404)
445
response = flask.send_from_directory(path.join(config.DATA_PATH, "pictures"), str(resource.id))
447
response.mimetype = resource.file_format
448
return response
450
@app.route("/api/object-types")
453
def object_types():
454
objects = db.session.query(PictureObject).all()
455
return flask.jsonify({object.id: object.description for object in objects})
456