[proxy] make it possible to create "ad hoc" packages through the web UI

1 files changed, 196 insertions, 0 deletions

diff --git a/src/hydrilla/proxy/web_ui/items_import.py b/src/hydrilla/proxy/web_ui/items_import.py
new file mode 100644
index 0000000..b335237
--- /dev/null
+++ b/src/hydrilla/proxy/web_ui/items_import.py
@@ -0,0 +1,196 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# Proxy web UI packages loading.
+#
+# 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 of 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 tempfile
+import zipfile
+import re
+import json
+import typing as t
+
+from pathlib import Path
+
+import flask
+import werkzeug
+
+from ...url_patterns import normalize_pattern
+from ...builder import build
+from ... import versions
+from .. import state as st
+from . import _app
+
+
+bp = flask.Blueprint('import', __package__)
+
+@bp.route('/import', methods=['GET'])
+def items_import(errors: t.Mapping[str, bool] = {}) -> werkzeug.Response:
+    html = flask.render_template('import.html.jinja', **errors)
+    return flask.make_response(html, 200)
+
+def items_import_from_file() -> werkzeug.Response:
+    zip_file_storage = flask.request.files.get('items_zipfile')
+    if zip_file_storage is None:
+        return items_import()
+
+    with tempfile.TemporaryDirectory() as tmpdir_str:
+        tmpdir = Path(tmpdir_str)
+        tmpdir_child = tmpdir / 'childdir'
+        tmpdir_child.mkdir()
+
+        try:
+            with zipfile.ZipFile(zip_file_storage) as zip_file:
+                zip_file.extractall(tmpdir_child)
+        except:
+            return items_import({'uploaded_file_not_zip': True})
+
+        extracted_top_level_files = tuple(tmpdir_child.iterdir())
+        if extracted_top_level_files == ():
+            return items_import({'invalid_uploaded_malcontent': True})
+
+        if len(extracted_top_level_files) == 1 and \
+           extracted_top_level_files[0].is_dir():
+            malcontent_dir_path = extracted_top_level_files[0]
+        else:
+            malcontent_dir_path = tmpdir_child
+
+        try:
+            _app.get_haketilo_state().import_items(malcontent_dir_path)
+        except:
+            return items_import({'invalid_uploaded_malcontent': True})
+
+    return flask.redirect(flask.url_for('items.packages'))
+
+identifier_re = re.compile(r'^[-0-9a-z.]+$')
+
+def item_import_ad_hoc() -> werkzeug.Response:
+    form = flask.request.form
+    def get_as_str(field_name: str) -> str:
+        value = form[field_name]
+        assert isinstance(value, str)
+        return value.strip()
+
+    try:
+        identifier = get_as_str('identifier')
+        assert identifier
+        assert identifier_re.match(identifier)
+    except:
+        return items_import({'invalid_ad_hoc_identifier': True})
+
+    long_name = get_as_str('long_name') or identifier
+
+    resource_ref = {'identifier': identifier}
+
+    try:
+        ver = versions.parse(get_as_str('version') or '1')
+    except:
+        return items_import({'invalid_ad_hoc_version': True})
+
+    try:
+        pat_str = get_as_str('patterns')
+        patterns = [
+            normalize_pattern(p.strip())
+            for p in pat_str.split('\n')
+            if p and not p.isspace()
+        ]
+        assert patterns
+    except:
+        return items_import({'invalid_ad_hoc_patterns': True})
+
+    common_definition_fields: t.Mapping[str, t.Any] = {
+        'identifier':   identifier,
+        'long_name':    long_name,
+        'version':      ver,
+        'description':  get_as_str('description')
+    }
+
+    schema_url = \
+        'https://hydrilla.koszko.org/schemas/package_source-1.schema.json'
+
+    package_index_json = {
+        '$schema':      schema_url,
+        'source_name':  'haketilo-ad-hoc-package',
+        'copyright':    [],
+        'upstream_url': '<local ad hoc package>',
+        'definitions': [{
+            **common_definition_fields,
+            'type':     'mapping',
+            'payloads': dict((p, resource_ref) for p in patterns)
+        }, {
+            **common_definition_fields,
+            'type':         'resource',
+            'revision':     1,
+            'dependencies': [],
+            'scripts':      [{'file': 'script.js'}]
+        }]
+    }
+
+    with tempfile.TemporaryDirectory() as tmpdir_str:
+        tmpdir = Path(tmpdir_str)
+
+        source_dir = tmpdir / 'src'
+        source_dir.mkdir()
+
+        malcontent_dir = tmpdir / 'malcontent'
+        malcontent_dir.mkdir()
+
+        license_text = get_as_str('license_text')
+        if license_text:
+            package_index_json['copyright'] = [{'file': 'COPYING'}]
+            (source_dir / 'COPYING').write_text(license_text)
+
+        (source_dir / 'script.js').write_text(get_as_str('script_text'))
+
+        (source_dir / 'index.json').write_text(json.dumps(package_index_json))
+
+        try:
+            builder_args = ['-s', str(source_dir), '-d', str(malcontent_dir)]
+            build.perform(builder_args, standalone_mode=False)
+            build.perform(['-s', str(source_dir), '-d', '/tmp/haketilodebug'], standalone_mode=False)
+            _app.get_haketilo_state().import_items(malcontent_dir)
+        except:
+            import traceback
+            traceback.print_exc()
+            return items_import({'invalid_ad_hoc_package': True})
+
+    return flask.redirect(flask.url_for('items.packages'))
+
+@bp.route('/import', methods=['POST'])
+def items_import_post() -> werkzeug.Response:
+    action = flask.request.form['action']
+
+    if action == 'import_from_file':
+        return items_import_from_file()
+    elif action == 'import_ad_hoc':
+        return item_import_ad_hoc()
+    else:
+        raise ValueError()