cic-stack/apps/cic-ussd/cic_ussd/metadata/base.py
2021-08-06 16:29:01 +00:00

102 lines
3.4 KiB
Python

# standard imports
import json
import logging
import os
from typing import Dict, Union
# third-part imports
from cic_types.models.person import generate_metadata_pointer, Person
# local imports
from cic_ussd.cache import cache_data, get_cached_data
from cic_ussd.http.requests import error_handler, make_request
from cic_ussd.metadata.signer import Signer
logg = logging.getLogger(__file__)
class Metadata:
"""
:cvar base_url: The base url or the metadata server.
:type base_url: str
"""
base_url = None
class MetadataRequestsHandler(Metadata):
def __init__(self, cic_type: str, identifier: bytes, engine: str = 'pgp'):
""""""
self.cic_type = cic_type
self.engine = engine
self.headers = {
'X-CIC-AUTOMERGE': 'server',
'Content-Type': 'application/json'
}
self.identifier = identifier
self.metadata_pointer = generate_metadata_pointer(
identifier=self.identifier,
cic_type=self.cic_type
)
if self.base_url:
self.url = os.path.join(self.base_url, self.metadata_pointer)
def create(self, data: Union[Dict, str]):
""""""
data = json.dumps(data)
result = make_request(method='POST', url=self.url, data=data, headers=self.headers)
error_handler(result=result)
metadata = result.json()
return self.edit(data=metadata)
def edit(self, data: Union[Dict, str]):
""""""
cic_meta_signer = Signer()
signature = cic_meta_signer.sign_digest(data=data)
algorithm = cic_meta_signer.get_operational_key().get('algo')
formatted_data = {
'm': json.dumps(data),
's': {
'engine': self.engine,
'algo': algorithm,
'data': signature,
'digest': data.get('digest'),
}
}
formatted_data = json.dumps(formatted_data)
result = make_request(method='PUT', url=self.url, data=formatted_data, headers=self.headers)
logg.info(f'signed metadata submission status: {result.status_code}.')
error_handler(result=result)
try:
decoded_identifier = self.identifier.decode("utf-8")
except UnicodeDecodeError:
decoded_identifier = self.identifier.hex()
logg.info(f'identifier: {decoded_identifier}. metadata pointer: {self.metadata_pointer} set to: {data}.')
return result
def query(self):
""""""
result = make_request(method='GET', url=self.url)
error_handler(result=result)
result_data = result.json()
if not isinstance(result_data, dict):
raise ValueError(f'Invalid result data object: {result_data}.')
if result.status_code == 200:
if self.cic_type == ':cic.person':
person = Person()
person_data = person.deserialize(person_data=result_data)
serialized_person_data = person_data.serialize()
data = json.dumps(serialized_person_data)
else:
data = json.dumps(result_data)
cache_data(key=self.metadata_pointer, data=data)
logg.debug(f'caching: {data} with key: {self.metadata_pointer}')
return result_data
def get_cached_metadata(self):
""""""
key = generate_metadata_pointer(self.identifier, self.cic_type)
return get_cached_data(key)