Python script, ASCII text executable
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import json
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from datetime import datetime
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from email.policy import default
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from time import perf_counter
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import flask
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from flask_sqlalchemy import SQLAlchemy
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from flask_bcrypt import Bcrypt
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from flask_httpauth import HTTPBasicAuth
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from markupsafe import escape, Markup
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from flask_migrate import Migrate, current
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from jinja2_fragments.flask import render_block
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from sqlalchemy.orm import backref
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import sqlalchemy.dialects.postgresql
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from os import path
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from urllib.parse import urlencode
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import mimetypes
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import ruamel.yaml as yaml
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from PIL import Image
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import config
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import markdown
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app = flask.Flask(__name__)
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bcrypt = Bcrypt(app)
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app.config["SQLALCHEMY_DATABASE_URI"] = config.DB_URI
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app.config["SECRET_KEY"] = config.DB_PASSWORD
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db = SQLAlchemy(app)
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migrate = Migrate(app, db)
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@app.template_filter("split")
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def split(value, separator=None, maxsplit=-1):
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return value.split(separator, maxsplit)
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@app.template_filter("median")
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def median(value):
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value = list(value) # prevent generators
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return sorted(value)[len(value) // 2]
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@app.template_filter("set")
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def set_filter(value):
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return set(value)
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@app.template_global()
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def modify_query(**new_values):
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args = flask.request.args.copy()
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for key, value in new_values.items():
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args[key] = value
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return f"{flask.request.path}?{urlencode(args)}"
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@app.context_processor
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def default_variables():
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return {
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"current_user": db.session.get(User, flask.session.get("username")),
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}
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with app.app_context():
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class User(db.Model):
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username = db.Column(db.String(32), unique=True, nullable=False, primary_key=True)
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password_hashed = db.Column(db.String(60), nullable=False)
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admin = db.Column(db.Boolean, nullable=False, default=False, server_default="false")
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pictures = db.relationship("PictureResource", back_populates="author")
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def __init__(self, username, password):
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self.username = username
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self.password_hashed = bcrypt.generate_password_hash(password).decode("utf-8")
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class Licence(db.Model):
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id = db.Column(db.String(64), primary_key=True) # SPDX identifier
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title = db.Column(db.UnicodeText, nullable=False) # the official name of the licence
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description = db.Column(db.UnicodeText, nullable=False) # brief description of its permissions and restrictions
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info_url = db.Column(db.String(1024), nullable=False) # the URL to a page with general information about the licence
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url = db.Column(db.String(1024), nullable=True) # the URL to a page with the full text of the licence and more information
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pictures = db.relationship("PictureLicence", back_populates="licence")
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free = db.Column(db.Boolean, nullable=False, default=False) # whether the licence is free or not
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logo_url = db.Column(db.String(1024), nullable=True) # URL to the logo of the licence
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pinned = db.Column(db.Boolean, nullable=False, default=False) # whether the licence should be shown at the top of the list
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def __init__(self, id, title, description, info_url, url, free, logo_url=None, pinned=False):
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self.id = id
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self.title = title
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self.description = description
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self.info_url = info_url
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self.url = url
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self.free = free
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self.logo_url = logo_url
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self.pinned = pinned
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class PictureLicence(db.Model):
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id = db.Column(db.Integer, primary_key=True, autoincrement=True)
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resource_id = db.Column(db.Integer, db.ForeignKey("picture_resource.id"))
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licence_id = db.Column(db.String(64), db.ForeignKey("licence.id"))
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resource = db.relationship("PictureResource", back_populates="licences")
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licence = db.relationship("Licence", back_populates="pictures")
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def __init__(self, resource_id, licence_id):
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self.resource_id = resource_id
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self.licence_id = licence_id
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class Resource(db.Model):
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__abstract__ = True
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id = db.Column(db.Integer, primary_key=True, autoincrement=True)
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title = db.Column(db.UnicodeText, nullable=False)
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description = db.Column(db.UnicodeText, nullable=False)
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timestamp = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)
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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
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class PictureNature(db.Model):
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# Examples:
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# "photo", "paper-scan", "2d-art-photo", "sculpture-photo", "computer-3d", "computer-painting",
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# "computer-line-art", "diagram", "infographic", "text", "map", "chart-graph", "screen-capture",
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# "screen-photo", "pattern", "collage", "ai", and so on
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id = db.Column(db.String(64), primary_key=True)
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description = db.Column(db.UnicodeText, nullable=False)
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resources = db.relationship("PictureResource", back_populates="nature")
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def __init__(self, id, description):
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self.id = id
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self.description = description
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class PictureObjectInheritance(db.Model):
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parent_id = db.Column(db.String(64), db.ForeignKey("picture_object.id"),
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primary_key=True)
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child_id = db.Column(db.String(64), db.ForeignKey("picture_object.id"),
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primary_key=True)
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parent = db.relationship("PictureObject", foreign_keys=[parent_id],
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back_populates="child_links")
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child = db.relationship("PictureObject", foreign_keys=[child_id],
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back_populates="parent_links")
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def __init__(self, parent, child):
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self.parent = parent
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self.child = child
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class PictureObject(db.Model):
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id = db.Column(db.String(64), primary_key=True)
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description = db.Column(db.UnicodeText, nullable=False)
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child_links = db.relationship("PictureObjectInheritance",
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foreign_keys=[PictureObjectInheritance.parent_id],
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back_populates="parent")
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parent_links = db.relationship("PictureObjectInheritance",
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foreign_keys=[PictureObjectInheritance.child_id],
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back_populates="child")
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def __init__(self, id, description):
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self.id = id
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self.description = description
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class PictureRegion(db.Model):
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# This is for picture region annotations
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id = db.Column(db.Integer, primary_key=True, autoincrement=True)
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json = db.Column(sqlalchemy.dialects.postgresql.JSONB, nullable=False)
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resource_id = db.Column(db.Integer, db.ForeignKey("picture_resource.id"), nullable=False)
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object_id = db.Column(db.String(64), db.ForeignKey("picture_object.id"), nullable=True)
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resource = db.relationship("PictureResource", backref="regions")
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object = db.relationship("PictureObject", backref="regions")
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def __init__(self, json, resource, object):
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self.json = json
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self.resource = resource
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self.object = object
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class PictureResource(Resource):
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# This is only for bitmap pictures. Vectors will be stored under a different model
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# File name is the ID in the picture directory under data, without an extension
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file_format = db.Column(db.String(64), nullable=False) # MIME type
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width = db.Column(db.Integer, nullable=False)
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height = db.Column(db.Integer, nullable=False)
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nature_id = db.Column(db.String(32), db.ForeignKey("picture_nature.id"), nullable=True)
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author_name = db.Column(db.String(32), db.ForeignKey("user.username"), nullable=False)
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author = db.relationship("User", back_populates="pictures")
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nature = db.relationship("PictureNature", back_populates="resources")
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replaces_id = db.Column(db.Integer, db.ForeignKey("picture_resource.id"), nullable=True)
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replaced_by_id = db.Column(db.Integer, db.ForeignKey("picture_resource.id"),
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nullable=True)
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replaces = db.relationship("PictureResource", remote_side="PictureResource.id",
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foreign_keys=[replaces_id], back_populates="replaced_by")
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replaced_by = db.relationship("PictureResource", remote_side="PictureResource.id",
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foreign_keys=[replaced_by_id])
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licences = db.relationship("PictureLicence", back_populates="resource")
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def __init__(self, title, author, description, origin_url, licence_ids, mime, nature=None,
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replaces=None):
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self.title = title
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self.author = author
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self.description = description
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self.origin_url = origin_url
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self.file_format = mime
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self.width = self.height = 0
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self.nature = nature
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db.session.add(self)
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db.session.commit()
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for licence_id in licence_ids:
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joiner = PictureLicence(self.id, licence_id)
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db.session.add(joiner)
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if replaces is not None:
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self.replaces = replaces
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replaces.replaced_by = self
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def put_annotations(self, json):
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# Delete all previous annotations
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db.session.query(PictureRegion).filter_by(resource_id=self.id).delete()
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for region in json:
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object_id = region["object"]
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picture_object = db.session.get(PictureObject, object_id)
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region_data = {
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"type": region["type"],
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"shape": region["shape"],
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}
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region_row = PictureRegion(region_data, self, picture_object)
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db.session.add(region_row)
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@app.route("/")
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def index():
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return flask.render_template("home.html", resources=PictureResource.query.order_by(db.func.random()).limit(10).all())
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@app.route("/accounts/")
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def accounts():
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return flask.render_template("login.html")
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@app.route("/login", methods=["POST"])
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def login():
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username = flask.request.form["username"]
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password = flask.request.form["password"]
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user = db.session.get(User, username)
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if user is None:
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flask.flash("This username is not registered.")
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return flask.redirect("/accounts")
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if not bcrypt.check_password_hash(user.password_hashed, password):
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flask.flash("Incorrect password.")
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return flask.redirect("/accounts")
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flask.flash("You have been logged in.")
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flask.session["username"] = username
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return flask.redirect("/")
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@app.route("/logout")
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def logout():
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flask.session.pop("username", None)
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flask.flash("You have been logged out.")
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return flask.redirect("/")
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@app.route("/signup", methods=["POST"])
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def signup():
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username = flask.request.form["username"]
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password = flask.request.form["password"]
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if db.session.get(User, username) is not None:
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flask.flash("This username is already taken.")
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return flask.redirect("/accounts")
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if set(username) > set("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_"):
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flask.flash("Usernames can only contain the Latin alphabet, digits, hyphens, and underscores.")
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return flask.redirect("/accounts")
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if len(username) < 3 or len(username) > 32:
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flask.flash("Usernames must be between 3 and 32 characters long.")
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return flask.redirect("/accounts")
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if len(password) < 6:
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flask.flash("Passwords must be at least 6 characters long.")
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return flask.redirect("/accounts")
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user = User(username, password)
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db.session.add(user)
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db.session.commit()
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flask.session["username"] = username
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flask.flash("You have been registered and logged in.")
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return flask.redirect("/")
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@app.route("/profile", defaults={"username": None})
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@app.route("/profile/<username>")
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def profile(username):
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if username is None:
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if "username" in flask.session:
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return flask.redirect("/profile/" + flask.session["username"])
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else:
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flask.flash("Please log in to perform this action.")
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return flask.redirect("/accounts")
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user = db.session.get(User, username)
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if user is None:
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flask.abort(404)
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return flask.render_template("profile.html", user=user)
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@app.route("/object/<id>")
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def has_object(id):
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object_ = db.session.get(PictureObject, id)
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if object_ is None:
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flask.abort(404)
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query = db.session.query(PictureResource).join(PictureRegion).filter(PictureRegion.object_id == id)
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page = int(flask.request.args.get("page", 1))
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per_page = int(flask.request.args.get("per_page", 16))
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resources = query.paginate(page=page, per_page=per_page)
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return flask.render_template("object.html", object=object_, resources=resources, page_number=page,
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page_length=per_page, num_pages=resources.pages, prev_page=resources.prev_num,
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next_page=resources.next_num, PictureRegion=PictureRegion)
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@app.route("/upload")
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def upload():
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if "username" not in flask.session:
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flask.flash("Log in to upload pictures.")
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return flask.redirect("/accounts")
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licences = Licence.query.order_by(Licence.free.desc(), Licence.pinned.desc(), Licence.title).all()
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types = PictureNature.query.all()
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return flask.render_template("upload.html", licences=licences, types=types)
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@app.route("/upload", methods=["POST"])
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def upload_post():
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title = flask.request.form["title"]
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description = flask.request.form["description"]
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origin_url = flask.request.form["origin_url"]
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author = db.session.get(User, flask.session.get("username"))
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licence_ids = flask.request.form.getlist("licence")
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nature_id = flask.request.form["nature"]
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if author is None:
377
flask.abort(401)
378
file = flask.request.files["file"]
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if not file or not file.filename:
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flask.flash("Select a file")
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return flask.redirect(flask.request.url)
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if not file.mimetype.startswith("image/"):
386
flask.flash("Only images are supported")
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return flask.redirect(flask.request.url)
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if not title:
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flask.flash("Enter a title")
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return flask.redirect(flask.request.url)
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if not description:
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description = ""
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if not nature_id:
397
flask.flash("Select a picture type")
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return flask.redirect(flask.request.url)
399
if not licence_ids:
401
flask.flash("Select licences")
402
return flask.redirect(flask.request.url)
403
licences = [db.session.get(Licence, licence_id) for licence_id in licence_ids]
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if not any(licence.free for licence in licences):
406
flask.flash("Select at least one free licence")
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return flask.redirect(flask.request.url)
408
resource = PictureResource(title, author, description, origin_url, licence_ids, file.mimetype,
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db.session.get(PictureNature, nature_id))
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db.session.add(resource)
412
db.session.commit()
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file.save(path.join(config.DATA_PATH, "pictures", str(resource.id)))
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pil_image = Image.open(path.join(config.DATA_PATH, "pictures", str(resource.id)))
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resource.width, resource.height = pil_image.size
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db.session.commit()
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if flask.request.form.get("annotations"):
419
try:
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resource.put_annotations(json.loads(flask.request.form.get("annotations")))
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db.session.commit()
422
except json.JSONDecodeError:
423
flask.flash("Invalid annotations")
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flask.flash("Picture uploaded successfully")
426
return flask.redirect("/picture/" + str(resource.id))
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@app.route("/picture/<int:id>/")
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def picture(id):
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resource = db.session.get(PictureResource, id)
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if resource is None:
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flask.abort(404)
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image = Image.open(path.join(config.DATA_PATH, "pictures", str(resource.id)))
437
return flask.render_template("picture.html", resource=resource,
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file_extension=mimetypes.guess_extension(resource.file_format),
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size=image.size)
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@app.route("/picture/<int:id>/annotate")
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def annotate_picture(id):
446
resource = db.session.get(PictureResource, id)
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if resource is None:
448
flask.abort(404)
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current_user = db.session.get(User, flask.session.get("username"))
451
if current_user is None:
452
flask.abort(401)
453
if resource.author != current_user and not current_user.admin:
454
flask.abort(403)
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return flask.render_template("picture-annotation.html", resource=resource,
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file_extension=mimetypes.guess_extension(resource.file_format))
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@app.route("/picture/<int:id>/put-annotations-form")
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def put_annotations_form(id):
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resource = db.session.get(PictureResource, id)
463
if resource is None:
464
flask.abort(404)
465
current_user = db.session.get(User, flask.session.get("username"))
467
if current_user is None:
468
flask.abort(401)
469
if resource.author != current_user and not current_user.admin:
471
flask.abort(403)
472
return flask.render_template("put-annotations-form.html", resource=resource)
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@app.route("/picture/<int:id>/put-annotations-form", methods=["POST"])
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def put_annotations_form_post(id):
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resource = db.session.get(PictureResource, id)
479
if resource is None:
480
flask.abort(404)
481
current_user = db.session.get(User, flask.session.get("username"))
483
if current_user is None:
484
flask.abort(401)
485
if resource.author != current_user and not current_user.admin:
487
flask.abort(403)
488
resource.put_annotations(json.loads(flask.request.form["annotations"]))
490
db.session.commit()
492
return flask.redirect("/picture/" + str(resource.id))
494
@app.route("/picture/<int:id>/save-annotations", methods=["POST"])
498
def save_annotations(id):
499
resource = db.session.get(PictureResource, id)
500
if resource is None:
501
flask.abort(404)
502
current_user = db.session.get(User, flask.session.get("username"))
504
if resource.author != current_user and not current_user.admin:
505
flask.abort(403)
506
resource.put_annotations(flask.request.json)
508
db.session.commit()
510
response = flask.make_response()
512
response.status_code = 204
513
return response
514
@app.route("/picture/<int:id>/get-annotations")
517
def get_annotations(id):
518
resource = db.session.get(PictureResource, id)
519
if resource is None:
520
flask.abort(404)
521
regions = db.session.query(PictureRegion).filter_by(resource_id=id).all()
523
regions_json = []
525
for region in regions:
527
regions_json.append({
528
"object": region.object_id,
529
"type": region.json["type"],
530
"shape": region.json["shape"],
531
})
532
return flask.jsonify(regions_json)
534
@app.route("/picture/<int:id>/delete")
537
def delete_picture(id):
538
resource = db.session.get(PictureResource, id)
539
if resource is None:
540
flask.abort(404)
541
current_user = db.session.get(User, flask.session.get("username"))
543
if current_user is None:
544
flask.abort(401)
545
if resource.author != current_user and not current_user.admin:
547
flask.abort(403)
548
PictureLicence.query.filter_by(resource=resource).delete()
550
PictureRegion.query.filter_by(resource=resource).delete()
551
db.session.delete(resource)
552
db.session.commit()
553
return flask.redirect("/")
555
@app.route("/query-pictures", methods=["POST"]) # sadly GET can't have a body
558
def query_pictures():
559
offset = int(flask.request.args.get("offset", 0))
560
limit = int(flask.request.args.get("limit", 16))
561
ordering = flask.request.args.get("ordering", "date-desc")
562
yaml_parser = yaml.YAML()
564
query_data = yaml_parser.load(flask.request.data) or {}
565
query = db.session.query(PictureResource)
567
requirement_conditions = {
569
"has_object": lambda value: PictureResource.regions.any(
570
PictureRegion.object_id.in_(value)),
571
"nature": lambda value: PictureResource.nature_id.in_(value),
572
"licence": lambda value: PictureResource.licences.any(
573
PictureLicence.licence_id.in_(value)),
574
"author": lambda value: PictureResource.author_name.in_(value),
575
"title": lambda value: PictureResource.title.ilike(value),
576
"description": lambda value: PictureResource.description.ilike(value),
577
"origin_url": lambda value: db.func.lower(db.func.substr(
578
PictureResource.origin_url,
579
db.func.length(db.func.split_part(PictureResource.origin_url, "://", 1)) + 4
580
)).in_(value),
581
"above_width": lambda value: PictureResource.width >= value,
582
"below_width": lambda value: PictureResource.width <= value,
583
"above_height": lambda value: PictureResource.height >= value,
584
"below_height": lambda value: PictureResource.height <= value,
585
"before_date": lambda value: PictureResource.timestamp <= datetime.utcfromtimestamp(
586
value),
587
"after_date": lambda value: PictureResource.timestamp >= datetime.utcfromtimestamp(
588
value)
589
}
590
if "want" in query_data:
591
for i in query_data["want"]:
592
requirement, value = list(i.items())[0]
593
condition = requirement_conditions.get(requirement)
594
if condition:
595
query = query.filter(condition(value))
596
if "exclude" in query_data:
597
for i in query_data["exclude"]:
598
requirement, value = list(i.items())[0]
599
condition = requirement_conditions.get(requirement)
600
if condition:
601
query = query.filter(~condition(value))
602
if not query_data.get("include_obsolete", False):
603
query = query.filter(PictureResource.replaced_by_id.is_(None))
604
match ordering:
606
case "date-desc":
607
query = query.order_by(PictureResource.timestamp.desc())
608
case "date-asc":
609
query = query.order_by(PictureResource.timestamp.asc())
610
case "title-asc":
611
query = query.order_by(PictureResource.title.asc())
612
case "title-desc":
613
query = query.order_by(PictureResource.title.desc())
614
case "random":
615
query = query.order_by(db.func.random())
616
case "number-regions-desc":
617
query = query.order_by(db.func.count(PictureResource.regions).desc())
618
case "number-regions-asc":
619
query = query.order_by(db.func.count(PictureResource.regions).asc())
620
query = query.offset(offset).limit(limit)
622
resources = query.all()
623
json_response = {
625
"date_generated": datetime.utcnow().timestamp(),
626
"resources": [],
627
"offset": offset,
628
"limit": limit,
629
}
630
json_resources = json_response["resources"]
632
for resource in resources:
634
json_resource = {
635
"id": resource.id,
636
"title": resource.title,
637
"description": resource.description,
638
"timestamp": resource.timestamp.timestamp(),
639
"origin_url": resource.origin_url,
640
"author": resource.author_name,
641
"file_format": resource.file_format,
642
"width": resource.width,
643
"height": resource.height,
644
"nature": resource.nature_id,
645
"licences": [licence.licence_id for licence in resource.licences],
646
"replaces": resource.replaces_id,
647
"replaced_by": resource.replaced_by_id,
648
"regions": [],
649
"download": config.ROOT_URL + flask.url_for("raw_picture", id=resource.id),
650
}
651
for region in resource.regions:
652
json_resource["regions"].append({
653
"object": region.object_id,
654
"type": region.json["type"],
655
"shape": region.json["shape"],
656
})
657
json_resources.append(json_resource)
659
response = flask.jsonify(json_response)
661
response.headers["Content-Type"] = "application/json"
662
return response
663
@app.route("/raw/picture/<int:id>")
666
def raw_picture(id):
667
resource = db.session.get(PictureResource, id)
668
if resource is None:
669
flask.abort(404)
670
response = flask.send_from_directory(path.join(config.DATA_PATH, "pictures"), str(resource.id))
672
response.mimetype = resource.file_format
673
return response
675
@app.route("/api/object-types")
678
def object_types():
679
objects = db.session.query(PictureObject).all()
680
return flask.jsonify({object.id: object.description for object in objects})
681