from sanic import Sanic
from sanic.response import text

from webargs import fields
from webargs_sanic.sanicparser import use_args


app = Sanic(__name__)

hello_args = {
    'name': fields.Str(required=True)
}

@app.route('/')
@use_args(hello_args, location="query")
async def index(request, args):
    return text('Hello ' + args['name'])

from sanic import Sanic
from sanic.views import HTTPMethodView
from sanic.response import json

from webargs import fields
from webargs_sanic.sanicparser import use_args, use_kwargs


app = Sanic(__name__)

class EchoMethodViewUseArgs(HTTPMethodView):
    @use_args({"val": fields.Int()}, location="form")
    async def post(self, request, args):
        return json(args)


app.add_route(EchoMethodViewUseArgs.as_view(), "/echo_method_view_use_args")


class EchoMethodViewUseKwargs(HTTPMethodView):
    @use_kwargs({"val": fields.Int()}, location="query")
    async def post(self, request, val):
        return json({"val": val})


app.add_route(EchoMethodViewUseKwargs.as_view(), "/echo_method_view_use_kwargs")

from sanic import Sanic
from sanic.response import json

from webargs import fields
from webargs_sanic.sanicparser import parser, HandleValidationError

app = Sanic(__name__)

@app.route("/echo_view_args_validated/<value>", methods=["GET"])
async def echo_use_args_validated(request, args):
    parsed = await parser.parse(
        {"value": fields.Int(required=True, validate=lambda args: args["value"] > 42)}, request, location="view_args"
    )
    return json(parsed)


# Return validation errors as JSON
@app.exception(HandleValidationError)
async def handle_validation_error(request, err):
    return json({"errors": err.exc.messages}, status=422)

from sanic import Sanic
from sanic import response
from sanic import Blueprint

from webargs_sanic.sanicparser import use_kwargs

from some_CUSTOM_storage import InMemory

from webargs import fields
from webargs import validate

import marshmallow.fields
from validate_email import validate_email

#usually this should not be here, better to import ;)
#please check examples for more info
class Email(marshmallow.fields.Field):

    def __init__(self, *args, **kwargs):
        super(Email, self).__init__(*args, **kwargs)

    def _deserialize(self, value, attr, obj):
        value = value.strip().lower()
        if not validate_email(value):
            self.fail('validator_failed')
        return value

user_update = {
    'user_data': fields.Nested({
        'email': Email(),
        'password': fields.Str(validate=lambda value: len(value)>=8),
        'first_name': fields.Str(validate=lambda value: len(value)>=1),
        'last_name': fields.Str(validate=lambda value: len(value)>=1),
        'middle_name': fields.Str(),
        'gender': fields.Str(validate=validate.OneOf(["M", "F"])),
        'birth_date': fields.Date(),
    }),
    'user_id': fields.Str(required=True, validate=lambda x:len(x)==32),
}


blueprint = Blueprint('app')
storage = InMemory()


@blueprint.put('/user/')
@use_kwargs(user_update, location="json_or_form")
async def update_user(request, user_id, user_data):
    storage.update_or_404(user_id, user_data)
    return response.text('', status=204)

app = Sanic(__name__)
app.blueprint(blueprint, url_prefix='/')