Python script, ASCII text executable
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from datetime import datetime
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from email.policy import default
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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
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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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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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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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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(32), 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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legal_text = db.Column(db.UnicodeText, nullable=False) # the full legal text of the licence
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url = db.Column(db.String(2048), 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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def __init__(self, id, title, description, legal_text, url):
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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.legal_text = legal_text
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self.url = url
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class PictureLicence(db.Model):
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resource_id = db.Column(db.Integer, db.ForeignKey("picture_resource.id"), primary_key=True)
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licence_id = db.Column(db.String(32), db.ForeignKey("licence.id"), primary_key=True)
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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", backref="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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backref="child_links")
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child = db.relationship("PictureObject", foreign_keys=[child_id],
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backref="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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backref="parent")
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parent_links = db.relationship("PictureObjectInheritance",
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foreign_keys=[PictureObjectInheritance.child_id],
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backref="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=False)
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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=False)
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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"), nullable=True) # if this is set, this resource is obsolete and hidden from search results, only available if asked for
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replaces = db.relationship("PictureResource", foreign_keys=[replaces_id], backref="replaced_by")
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replaced_by = db.relationship("PictureResource", foreign_keys=[replaced_by_id], backref="replaces")
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licences = db.relationship("ResourceLicence", # a work can be under multiple licences; at least one must be free, but others can be proprietary
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back_populates="resource")
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def __init__(self, title, description, origin_url, licence_ids, mime, size, nature, replaces=None):
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self.title = title
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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 = size
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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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@app.route("/")
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def index():
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return flask.render_template("home.html")
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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, None, 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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return flask.abort(404)
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return flask.render_template("profile.html", user=user)
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