add authentication and auhorization

Unit-02/03-hashing-sessions/app.py

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+from project import app
+
+if __name__ == '__main__':
+  app.run(debug=True, port=5000)

Unit-02/03-hashing-sessions/manage.py

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+from project import app,db 
+from flask_script import Manager
+from flask_migrate import Migrate, MigrateCommand
+migrate = Migrate(app, db)
+manager = Manager(app)
+
+manager.add_command('db', MigrateCommand)
+
+if __name__ == '__main__':
+    manager.run()

Unit-02/03-hashing-sessions/migrations/README

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+Generic single-database configuration.

Unit-02/03-hashing-sessions/migrations/alembic.ini

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+# A generic, single database configuration.
+
+[alembic]
+# template used to generate migration files
+# file_template = %%(rev)s_%%(slug)s
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

Unit-02/03-hashing-sessions/migrations/env.py

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+from __future__ import with_statement
+from alembic import context
+from sqlalchemy import engine_from_config, pool
+from logging.config import fileConfig
+import logging
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+fileConfig(config.config_file_name)
+logger = logging.getLogger('alembic.env')
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+from flask import current_app
+config.set_main_option('sqlalchemy.url',
+                       current_app.config.get('SQLALCHEMY_DATABASE_URI'))
+target_metadata = current_app.extensions['migrate'].db.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline():
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(url=url)
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online():
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+
+    # this callback is used to prevent an auto-migration from being generated
+    # when there are no changes to the schema
+    # reference: http://alembic.zzzcomputing.com/en/latest/cookbook.html
+    def process_revision_directives(context, revision, directives):
+        if getattr(config.cmd_opts, 'autogenerate', False):
+            script = directives[0]
+            if script.upgrade_ops.is_empty():
+                directives[:] = []
+                logger.info('No changes in schema detected.')
+
+    engine = engine_from_config(config.get_section(config.config_ini_section),
+                                prefix='sqlalchemy.',
+                                poolclass=pool.NullPool)
+
+    connection = engine.connect()
+    context.configure(connection=connection,
+                      target_metadata=target_metadata,
+                      process_revision_directives=process_revision_directives,
+                      **current_app.extensions['migrate'].configure_args)
+
+    try:
+        with context.begin_transaction():
+            context.run_migrations()
+    finally:
+        connection.close()
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

Unit-02/03-hashing-sessions/migrations/script.py.mako

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+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
+
+
+def upgrade():
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade():
+    ${downgrades if downgrades else "pass"}

Unit-02/03-hashing-sessions/migrations/versions/02c5024ca366_adding_messages_table.py

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+"""adding messages table
+
+Revision ID: 02c5024ca366
+Revises: a40d037bd01f
+Create Date: 2017-11-30 19:42:43.100357
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '02c5024ca366'
+down_revision = 'a40d037bd01f'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('messages',
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.Column('content', sa.Text(), nullable=True),
+    sa.Column('user_id', sa.Integer(), nullable=True),
+    sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('messages')
+    # ### end Alembic commands ###

Unit-02/03-hashing-sessions/migrations/versions/679a839ba586_.py

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+"""Add password and username
+
+Revision ID: 679a839ba586
+Revises: a35b193c677c
+Create Date: 2017-12-06 20:20:20.059722
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '679a839ba586'
+down_revision = 'a35b193c677c'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('users', sa.Column('password', sa.Text(), nullable=True))
+    op.add_column('users', sa.Column('username', sa.Text(), nullable=True))
+    op.create_unique_constraint(None, 'users', ['username'])
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint(None, 'users', type_='unique')
+    op.drop_column('users', 'username')
+    op.drop_column('users', 'password')
+    # ### end Alembic commands ###

Unit-02/03-hashing-sessions/migrations/versions/6f4cab9be9f4_adding_profile_link.py

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+"""adding profile link
+
+Revision ID: 6f4cab9be9f4
+Revises: 02c5024ca366
+Create Date: 2017-12-03 20:54:31.115296
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '6f4cab9be9f4'
+down_revision = '02c5024ca366'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('users', sa.Column('profile_link', sa.Text(), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('users', 'profile_link')
+    # ### end Alembic commands ###

Unit-02/03-hashing-sessions/migrations/versions/a35b193c677c_add_many_to_many_relationship_with_.py

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+"""add many to many relationship with messages-tags
+
+Revision ID: a35b193c677c
+Revises: 6f4cab9be9f4
+Create Date: 2017-12-05 17:26:14.653681
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'a35b193c677c'
+down_revision = '6f4cab9be9f4'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('tags',
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.Column('category', sa.Text(), nullable=True),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_table('messages_tags',
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.Column('messages_id', sa.Integer(), nullable=True),
+    sa.Column('tags_id', sa.Integer(), nullable=True),
+    sa.ForeignKeyConstraint(['messages_id'], ['messages.id'], ondelete='cascade'),
+    sa.ForeignKeyConstraint(['tags_id'], ['tags.id'], ondelete='cascade'),
+    sa.PrimaryKeyConstraint('id')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('messages_tags')
+    op.drop_table('tags')
+    # ### end Alembic commands ###

Unit-02/03-hashing-sessions/migrations/versions/a40d037bd01f_adding_users_table.py

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+"""adding users table
+
+Revision ID: a40d037bd01f
+Revises: 
+Create Date: 2017-11-30 16:48:58.180330
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'a40d037bd01f'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('users',
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.Column('first_name', sa.Text(), nullable=True),
+    sa.Column('last_name', sa.Text(), nullable=True),
+    sa.PrimaryKeyConstraint('id')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('users')
+    # ### end Alembic commands ###

Unit-02/03-hashing-sessions/project/__init__.py

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+from flask import Flask, redirect, url_for, render_template
+from flask_sqlalchemy import SQLAlchemy 
+from flask_modus import Modus 
+from flask_bcrypt import Bcrypt
+from os import environ
+
+app = Flask(__name__)
+bcrypt = Bcrypt(app)
+app.config['SQLALCHEMY_DATABASE_URI'] = 'postgres://localhost/users-messages'
+app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+app.config['SECRET_KEY'] = environ.get('SECRET_KEY')
+modus=Modus(app)
+db=SQLAlchemy(app)
+
+from project.users.views import users_blueprint
+from project.messages.views import messages_blueprint
+from project.tags.views import tags_blueprint
+
+app.register_blueprint(users_blueprint, url_prefix = '/users')
+app.register_blueprint(messages_blueprint, url_prefix = '/users/<int:user_id>/messages')
+app.register_blueprint(tags_blueprint, url_prefix = '/tags')
+
+@app.route('/')
+def root():
+	return redirect(url_for('users.index'))
+
+
+@app.errorhandler(404)
+def page_not_found(e):
+    return render_template('users/404.html', e=e), 404