SeaCogs/aurora/utilities/json.py

import json
from datetime import datetime, timedelta

from redbot.core.bot import Red


from aurora.models import AuroraBaseModel


class JSONEncoder(json.JSONEncoder):
    def default(self, o):
        if isinstance(o, datetime):
            return int(o.timestamp())
        if isinstance(o, timedelta):
            return str(o)
        if isinstance(o, AuroraBaseModel):
            return o.to_json()
        if isinstance(o, Red):
            return None
        return super().default(o)


# This is a wrapper around the json module's dumps function that uses our custom JSONEncoder class
def dumps(obj, *, skipkeys=False, ensure_ascii=True, check_circular=True,
        allow_nan=True, indent=None, separators=None,
        default=None, sort_keys=False, **kw) -> str:
    """Serialize ``obj`` to a JSON formatted ``str``.

    If ``skipkeys`` is true then ``dict`` keys that are not basic types
    (``str``, ``int``, ``float``, ``bool``, ``None``) will be skipped
    instead of raising a ``TypeError``.

    If ``ensure_ascii`` is false, then the return value can contain non-ASCII
    characters if they appear in strings contained in ``obj``. Otherwise, all
    such characters are escaped in JSON strings.

    If ``check_circular`` is false, then the circular reference check
    for container types will be skipped and a circular reference will
    result in an ``RecursionError`` (or worse).

    If ``allow_nan`` is false, then it will be a ``ValueError`` to
    serialize out of range ``float`` values (``nan``, ``inf``, ``-inf``) in
    strict compliance of the JSON specification, instead of using the
    JavaScript equivalents (``NaN``, ``Infinity``, ``-Infinity``).

    If ``indent`` is a non-negative integer, then JSON array elements and
    object members will be pretty-printed with that indent level. An indent
    level of 0 will only insert newlines. ``None`` is the most compact
    representation.

    If specified, ``separators`` should be an ``(item_separator, key_separator)``
    tuple.  The default is ``(', ', ': ')`` if *indent* is ``None`` and
    ``(',', ': ')`` otherwise.  To get the most compact JSON representation,
    you should specify ``(',', ':')`` to eliminate whitespace.

    ``default(obj)`` is a function that should return a serializable version
    of obj or raise TypeError. The default simply raises TypeError.

    If *sort_keys* is true (default: ``False``), then the output of
    dictionaries will be sorted by key.
    """
    return json.dumps(
        obj,
        cls=JSONEncoder,
        skipkeys=skipkeys,
        ensure_ascii=ensure_ascii,
        check_circular=check_circular,
        allow_nan=allow_nan,
        indent=indent,
        separators=separators,
        default=default,
        sort_keys=sort_keys,
        **kw
        )

# This is a wrapper around the json module's dump function that uses our custom JSONEncoder class
def dump(obj, fp, *, skipkeys=False, ensure_ascii=True, check_circular=True,
        allow_nan=True, indent=None, separators=None,
        default=None, sort_keys=False, **kw) -> str:
    """Serialize ``obj`` as a JSON formatted stream to ``fp`` (a
    ``.write()``-supporting file-like object).

    If ``skipkeys`` is true then ``dict`` keys that are not basic types
    (``str``, ``int``, ``float``, ``bool``, ``None``) will be skipped
    instead of raising a ``TypeError``.

    If ``ensure_ascii`` is false, then the strings written to ``fp`` can
    contain non-ASCII characters if they appear in strings contained in
    ``obj``. Otherwise, all such characters are escaped in JSON strings.

    If ``check_circular`` is false, then the circular reference check
    for container types will be skipped and a circular reference will
    result in an ``RecursionError`` (or worse).

    If ``allow_nan`` is false, then it will be a ``ValueError`` to
    serialize out of range ``float`` values (``nan``, ``inf``, ``-inf``)
    in strict compliance of the JSON specification, instead of using the
    JavaScript equivalents (``NaN``, ``Infinity``, ``-Infinity``).

    If ``indent`` is a non-negative integer, then JSON array elements and
    object members will be pretty-printed with that indent level. An indent
    level of 0 will only insert newlines. ``None`` is the most compact
    representation.

    If specified, ``separators`` should be an ``(item_separator, key_separator)``
    tuple.  The default is ``(', ', ': ')`` if *indent* is ``None`` and
    ``(',', ': ')`` otherwise.  To get the most compact JSON representation,
    you should specify ``(',', ':')`` to eliminate whitespace.

    ``default(obj)`` is a function that should return a serializable version
    of obj or raise TypeError. The default simply raises TypeError.

    If *sort_keys* is true (default: ``False``), then the output of
    dictionaries will be sorted by key.
    """
    return json.dump(
        obj,
        fp,
        cls=JSONEncoder,
        skipkeys=skipkeys,
        ensure_ascii=ensure_ascii,
        check_circular=check_circular,
        allow_nan=allow_nan,
        indent=indent,
        separators=separators,
        default=default,
        sort_keys=sort_keys,
        **kw
    )