[proxy] Add support for script blocking/allowing rules

1 files changed, 111 insertions, 0 deletions

diff --git a/src/hydrilla/proxy/web_ui/rules.py b/src/hydrilla/proxy/web_ui/rules.py
new file mode 100644
index 0000000..79d0b99
--- /dev/null
+++ b/src/hydrilla/proxy/web_ui/rules.py
@@ -0,0 +1,111 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# Proxy web UI script blocking rule management.
+#
+# This file is part of Hydrilla&Haketilo.
+#
+# Copyright (C) 2022 Wojtek Kosior
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+#
+# I, Wojtek Kosior, thereby promise not to sue for violation of this
+# file's license. Although I request that you do not make use this code
+# in a proprietary program, I am not going to enforce this in court.
+
+# Enable using with Python 3.7.
+from __future__ import annotations
+
+import typing as t
+
+import flask
+import werkzeug
+
+from .. import state as st
+from . import _app
+
+
+bp = flask.Blueprint('rules', __package__)
+
+@bp.route('/rules/add', methods=['GET'])
+def add_rule(errors: t.Mapping[str, bool] = {}) -> werkzeug.Response:
+    html = flask.render_template('rules/add.html.jinja', **errors)
+    return flask.make_response(html, 200)
+
+@bp.route('/rules/add', methods=['POST'])
+def add_rule_post() -> werkzeug.Response:
+    form_data = flask.request.form
+
+    try:
+        new_rule_ref = _app.get_haketilo_state().rule_store().add(
+            pattern = form_data['pattern'],
+            allow   = form_data['allow'] == 'true'
+        )
+    except st.RulePatternInvalid:
+        return add_rule({'rule_pattern_invalid': True})
+
+    return flask.redirect(flask.url_for('.show_rule', rule_id=new_rule_ref.id))
+
+@bp.route('/rules', methods=['GET'])
+def rules(errors: t.Mapping[str, bool] = {}) -> werkzeug.Response:
+    store = _app.get_haketilo_state().rule_store()
+
+    html = flask.render_template(
+        'rules/index.html.jinja',
+        display_infos = store.get_display_infos(),
+        **errors
+    )
+    return flask.make_response(html, 200)
+
+@bp.route('/rules/view/<string:rule_id>')
+def show_rule(rule_id: str, errors: t.Mapping[str, bool] = {}) \
+    -> werkzeug.Response:
+    try:
+        store = _app.get_haketilo_state().rule_store()
+        display_info = store.get(rule_id).get_display_info()
+
+        html = flask.render_template(
+            'rules/show_single.html.jinja',
+            display_info = display_info,
+            **errors
+        )
+        return flask.make_response(html, 200)
+    except st.MissingItemError:
+        flask.abort(404)
+
+@bp.route('/rules/view/<string:rule_id>', methods=['POST'])
+def alter_rule(rule_id: str) -> werkzeug.Response:
+    form_data = flask.request.form
+    action = form_data['action']
+
+    try:
+        rule_ref = _app.get_haketilo_state().rule_store().get(rule_id)
+
+        if action == 'remove_rule':
+            rule_ref.remove()
+            return flask.redirect(flask.url_for('.rules'))
+        elif action == 'update_rule_data':
+            allow_param = form_data.get('allow')
+            rule_ref.update(
+                pattern = form_data.get('pattern'),
+                allow   = None if allow_param is None else allow_param == 'true'
+            )
+        else:
+            raise ValueError()
+    except st.RulePatternInvalid:
+        return show_rule(rule_id, {'rule_pattern_invalid': True})
+    except st.MissingItemError:
+        flask.abort(404)
+
+    return flask.redirect(flask.url_for('.show_rule', rule_id=rule_id))