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bazarr/libs/knowit/serializer.py

156 lines
5.0 KiB

# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import json
from collections import OrderedDict
from datetime import timedelta
import babelfish
from six import text_type
import yaml
from .units import units
def format_property(context, o):
"""Convert properties to string."""
if isinstance(o, timedelta):
return format_duration(o, context['profile'])
if isinstance(o, babelfish.language.Language):
return format_language(o, context['profile'])
if hasattr(o, 'units'):
return format_quantity(o, context['profile'])
return text_type(o)
def get_json_encoder(context):
"""Return json encoder that handles all needed object types."""
class StringEncoder(json.JSONEncoder):
"""String json encoder."""
def default(self, o):
return format_property(context, o)
return StringEncoder
def get_yaml_dumper(context):
"""Return yaml dumper that handles all needed object types."""
class CustomDumper(yaml.SafeDumper):
"""Custom YAML Dumper."""
def default_representer(self, data):
"""Convert data to string."""
if isinstance(data, int):
return self.represent_int(data)
if isinstance(data, float):
return self.represent_float(data)
return self.represent_str(str(data))
def ordered_dict_representer(self, data):
"""Representer for OrderedDict."""
return self.represent_mapping('tag:yaml.org,2002:map', data.items())
def default_language_representer(self, data):
"""Convert language to string."""
return self.represent_str(format_language(data, context['profile']))
def default_quantity_representer(self, data):
"""Convert quantity to string."""
return self.default_representer(format_quantity(data, context['profile']))
def default_duration_representer(self, data):
"""Convert quantity to string."""
return self.default_representer(format_duration(data, context['profile']))
CustomDumper.add_representer(OrderedDict, CustomDumper.ordered_dict_representer)
CustomDumper.add_representer(babelfish.Language, CustomDumper.default_language_representer)
CustomDumper.add_representer(timedelta, CustomDumper.default_duration_representer)
CustomDumper.add_representer(units.Quantity, CustomDumper.default_quantity_representer)
return CustomDumper
def get_yaml_loader(constructors=None):
"""Return a yaml loader that handles sequences as python lists."""
constructors = constructors or {}
class CustomLoader(yaml.Loader):
"""Custom YAML Loader."""
pass
CustomLoader.add_constructor('tag:yaml.org,2002:seq', CustomLoader.construct_python_tuple)
for tag, constructor in constructors.items():
CustomLoader.add_constructor(tag, constructor)
return CustomLoader
def format_duration(duration, profile='default'):
if profile == 'technical':
return str(duration)
seconds = duration.total_seconds()
if profile == 'code':
return duration.total_seconds()
hours = int(seconds // 3600)
seconds = seconds - (hours * 3600)
minutes = int(seconds // 60)
seconds = int(seconds - (minutes * 60))
if profile == 'human':
if hours > 0:
return '{0} hours {1:02d} minutes {2:02d} seconds'.format(hours, minutes, seconds)
if minutes > 0:
return '{0} minutes {1:02d} seconds'.format(minutes, seconds)
return '{0} seconds'.format(seconds)
return '{0}:{1:02d}:{2:02d}'.format(hours, minutes, seconds)
def format_language(language, profile='default'):
if profile in ('default', 'human'):
return str(language.name)
return str(language)
def format_quantity(quantity, profile='default'):
"""Human friendly format."""
if profile == 'code':
return quantity.magnitude
unit = quantity.units
if unit != 'bit':
technical = profile == 'technical'
if unit == 'hertz':
return _format_quantity(quantity.magnitude, unit='Hz', binary=technical, precision=3 if technical else 1)
root_unit = quantity.to_root_units().units
if root_unit == 'bit':
return _format_quantity(quantity.magnitude, binary=technical, precision=3 if technical else 2)
if root_unit == 'bit / second':
return _format_quantity(quantity.magnitude, unit='bps', binary=technical, precision=3 if technical else 1)
return str(quantity)
def _format_quantity(num, unit='B', binary=False, precision=2):
fmt_pattern = '{value:3.%sf} {prefix}{affix}{unit}' % precision
factor = 1024. if binary else 1000.
binary_affix = 'i' if binary else ''
for prefix in ('', 'K', 'M', 'G', 'T', 'P', 'E', 'Z'):
if abs(num) < factor:
return fmt_pattern.format(value=num, prefix=prefix, affix=binary_affix, unit=unit)
num /= factor
return fmt_pattern.format(value=num, prefix='Y', affix=binary_affix, unit=unit)
YAMLLoader = get_yaml_loader()