gristlabs_grist-core/sandbox/grist/main.py

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"""
This module defines what sandbox functions are made available to the Node controller,
and starts the grist sandbox. See engine.py for the API documentation.
"""
import sys
sys.path.append('thirdparty')
# pylint: disable=wrong-import-position
import marshal
import functools
from acl_formula import parse_acl_formula
import actions
import sandbox
import engine
import migrations
import schema
import useractions
import objtypes
import logger
log = logger.Logger(__name__, logger.INFO)
def export(method):
# Wrap each method so that it logs a message that it's being called.
@functools.wraps(method)
def wrapper(*args, **kwargs):
log.debug("calling %s" % method.__name__)
return method(*args, **kwargs)
sandbox.register(method.__name__, wrapper)
def table_data_from_db(table_name, table_data_repr):
if table_data_repr is None:
return actions.TableData(table_name, [], {})
table_data_parsed = marshal.loads(table_data_repr)
id_col = table_data_parsed.pop("id")
return actions.TableData(table_name, id_col,
actions.decode_bulk_values(table_data_parsed, _decode_db_value))
def _decode_db_value(value):
# Decode database values received from SQLite's allMarshal() call. These are encoded by
# marshalling certain types and storing as BLOBs (received in Python as binary strings, as
# opposed to text which is received as unicode). See also encodeValue() in DocStorage.js
# TODO For the moment, the sandbox uses binary strings throughout (with text in utf8 encoding).
# We should switch to representing text with unicode instead. This requires care, at least in
# fixing various occurrences of str() in our code, which may fail and which return wrong type.
t = type(value)
if t == unicode:
return value.encode('utf8')
elif t == str:
return objtypes.decode_object(marshal.loads(value))
else:
return value
def main():
eng = engine.Engine()
@export
def apply_user_actions(action_reprs):
action_group = eng.apply_user_actions([useractions.from_repr(u) for u in action_reprs])
return eng.acl_split(action_group).to_json_obj()
@export
def fetch_table(table_id, formulas=True, query=None):
return actions.get_action_repr(eng.fetch_table(table_id, formulas=formulas, query=query))
@export
def fetch_table_schema():
return eng.fetch_table_schema()
@export
def fetch_snapshot():
action_group = eng.fetch_snapshot()
return eng.acl_split(action_group).to_json_obj()
@export
def autocomplete(txt, table_id):
return eng.autocomplete(txt, table_id)
@export
def find_col_from_values(values, n, opt_table_id):
return eng.find_col_from_values(values, n, opt_table_id)
@export
def fetch_meta_tables(formulas=True):
return {table_id: actions.get_action_repr(table_data)
for (table_id, table_data) in eng.fetch_meta_tables(formulas).iteritems()}
@export
def load_meta_tables(meta_tables, meta_columns):
return eng.load_meta_tables(table_data_from_db("_grist_Tables", meta_tables),
table_data_from_db("_grist_Tables_column", meta_columns))
@export
def load_table(table_name, table_data):
return eng.load_table(table_data_from_db(table_name, table_data))
@export
def create_migrations(all_tables, metadata_only=False):
doc_actions = migrations.create_migrations(
{t: table_data_from_db(t, data) for t, data in all_tables.iteritems()}, metadata_only)
return map(actions.get_action_repr, doc_actions)
@export
def get_version():
return schema.SCHEMA_VERSION
@export
def get_formula_error(table_id, col_id, row_id):
return objtypes.encode_object(eng.get_formula_error(table_id, col_id, row_id))
export(parse_acl_formula)
export(eng.load_empty)
export(eng.load_done)
sandbox.run()
if __name__ == "__main__":
main()