KAG/knext/schema/client.py

# -*- coding: utf-8 -*-
# Copyright 2023 OpenSPG Authors
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
# in compliance with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software distributed under the License
# is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
# or implied.
import os
from typing import List, Dict

import knext.common.cache
from knext.common.base.client import Client
from knext.common.rest import ApiClient, Configuration
from knext.schema import rest
from knext.schema.model.base import BaseSpgType, AlterOperationEnum, SpgTypeEnum
from knext.schema.model.relation import Relation

cache = knext.common.cache.SchemaCache()


CHUNK_TYPE = "Chunk"
OTHER_TYPE = "Others"
TEXT_TYPE = "Text"
INTEGER_TYPE = "Integer"
FLOAT_TYPE = "Float"
BASIC_TYPES = [TEXT_TYPE, INTEGER_TYPE, FLOAT_TYPE]


class SchemaSession:
    def __init__(self, client, project_id):
        self._alter_spg_types: List[BaseSpgType] = []
        self._rest_client = client
        self._project_id = project_id

        self._spg_types = {}
        self.__spg_types = {}
        self._init_spg_types()

    def _init_spg_types(self):
        """Query project schema and init SPG types in session."""
        project_schema = self._rest_client.schema_query_project_schema_get(
            self._project_id
        )
        for spg_type in project_schema.spg_types:
            spg_type_name = spg_type.basic_info.name.name
            type_class = BaseSpgType.by_type_enum(spg_type.spg_type_enum)
            if spg_type.spg_type_enum == SpgTypeEnum.Concept:
                self._spg_types[spg_type_name] = type_class(
                    name=spg_type_name,
                    hypernym_predicate=spg_type.concept_layer_config.hypernym_predicate,
                    rest_model=spg_type,
                )
            else:
                self._spg_types[spg_type_name] = type_class(
                    name=spg_type_name, rest_model=spg_type
                )

    @property
    def spg_types(self) -> Dict[str, BaseSpgType]:
        return self._spg_types

    def get(self, spg_type_name) -> BaseSpgType:
        """Get SPG type by name from project schema."""
        spg_type = self._spg_types.get(spg_type_name)
        if spg_type is None:
            spg_type = self.__spg_types.get(spg_type_name)
            if spg_type is None:
                raise ValueError(f"{spg_type_name} is not existed")
            else:
                return self.__spg_types.get(spg_type_name)
        return self._spg_types.get(spg_type_name)

    def create_type(self, spg_type: BaseSpgType):
        """Add an SPG type in session with `CREATE` operation."""
        spg_type.alter_operation = AlterOperationEnum.Create
        self.__spg_types[spg_type.name] = spg_type
        self._alter_spg_types.append(spg_type)
        return self

    def update_type(self, spg_type: BaseSpgType):
        """Add an SPG type in session with `UPDATE` operation."""
        spg_type.alter_operation = AlterOperationEnum.Update
        self._alter_spg_types.append(spg_type)
        return self

    def delete_type(self, spg_type: BaseSpgType):
        """Add an SPG type in session with `DELETE` operation."""
        spg_type.alter_operation = AlterOperationEnum.Delete
        self._alter_spg_types.append(spg_type)
        return self

    def commit(self):
        """Commit all altered schemas to server."""
        schema_draft = []
        for spg_type in self._alter_spg_types:
            for prop in spg_type.properties.values():
                if prop.object_spg_type is None:
                    object_spg_type = self.get(prop.object_type_name)
                    prop.object_spg_type = object_spg_type.spg_type_enum
                for sub_prop in prop.sub_properties.values():
                    if sub_prop.object_spg_type is None:
                        object_spg_type = self.get(sub_prop.object_type_name)
                        sub_prop.object_spg_type = object_spg_type.spg_type_enum
            for rel in spg_type.relations.values():
                if rel.is_dynamic is None:
                    rel.is_dynamic = False
                if rel.object_spg_type is None:
                    object_spg_type = self.get(rel.object_type_name)
                    rel.object_spg_type = object_spg_type.spg_type_enum
                for sub_prop in rel.sub_properties.values():
                    if sub_prop.object_spg_type is None:
                        object_spg_type = self.get(sub_prop.object_type_name)
                        sub_prop.object_spg_type = object_spg_type.spg_type_enum
            schema_draft.append(spg_type.to_rest())
        if len(schema_draft) == 0:
            return

        request = rest.SchemaAlterRequest(
            project_id=self._project_id, schema_draft=rest.SchemaDraft(schema_draft)
        )
        key = "KNEXT_DEBUG_DUMP_SCHEMA"
        dump_flag = os.getenv(key)
        if dump_flag is not None and dump_flag.strip() == "1":
            print(request)
        else:
            print(f"Committing schema: set {key}=1 to dump the schema")
        self._rest_client.schema_alter_schema_post(schema_alter_request=request)


class SchemaClient(Client):
    """ """

    def __init__(self, host_addr: str = None, project_id: str = None):
        super().__init__(host_addr, project_id)
        self._session = None
        self._rest_client: rest.SchemaApi = rest.SchemaApi(
            api_client=ApiClient(configuration=Configuration(host=host_addr))
        )
    def query_spg_type(self, spg_type_name: str) -> BaseSpgType:
        """Query SPG type by name."""
        rest_model = self._rest_client.schema_query_spg_type_get(spg_type_name)
        type_class = BaseSpgType.by_type_enum(f"{rest_model.spg_type_enum}")

        if rest_model.spg_type_enum == SpgTypeEnum.Concept:
            return type_class(
                name=spg_type_name,
                hypernym_predicate=rest_model.concept_layer_config.hypernym_predicate,
                rest_model=rest_model,
            )
        else:
            return type_class(name=spg_type_name, rest_model=rest_model)

    def query_relation(
        self, subject_name: str, predicate_name: str, object_name: str
    ) -> Relation:
        """Query relation type by s_p_o name."""
        rest_model = self._rest_client.schema_query_relation_get(
            subject_name, predicate_name, object_name
        )
        return Relation(
            name=predicate_name, object_type_name=object_name, rest_model=rest_model
        )

    def create_session(self):
        """Create session for altering schema."""
        schema_session = cache.get(self._project_id)
        if not schema_session:
            schema_session = SchemaSession(self._rest_client, self._project_id)
            cache.put(self._project_id, schema_session)
        return schema_session

    def load(self):
        schema_session = self.create_session()
        schema = {
            k.split(".")[-1]: v
            for k, v in schema_session.spg_types.items()
            if v.spg_type_enum
            in [SpgTypeEnum.Concept, SpgTypeEnum.Entity, SpgTypeEnum.Event]
        }
        return schema

    def extract_types(self):
        schema = self.load()
        types = [t for t in schema.keys() if t not in [CHUNK_TYPE] + BASIC_TYPES]
        return types