Implemented support for else statements in if(s)

This commit is contained in:
Fabio Manganiello 2018-09-27 01:09:00 +02:00
parent a4de4933df
commit 38fdb8be08

View file

@ -1,6 +1,7 @@
import logging import logging
import re import re
from queue import LifoQueue
from ..config import Config from ..config import Config
from ..message.request import Request from ..message.request import Request
from ..message.response import Response from ..message.response import Response
@ -31,10 +32,12 @@ class Procedure(object):
@classmethod @classmethod
def build(cls, name, _async, requests, args=None, backend=None, id=None, **kwargs): def build(cls, name, _async, requests, args=None, backend=None, id=None, procedure_class=None, **kwargs):
reqs = [] reqs = []
loop_count = 0 loop_count = 0
if_count = 0 if_count = 0
if_config = LifoQueue()
procedure_class = procedure_class or cls
for request_config in requests: for request_config in requests:
# Check if this request is a for loop # Check if this request is a for loop
@ -65,19 +68,36 @@ class Procedure(object):
if len(request_config.keys()) >= 1: if len(request_config.keys()) >= 1:
key = list(request_config.keys())[0] key = list(request_config.keys())[0]
m = re.match('\s*(if)\s+\$\{(.*)\}\s*', key) m = re.match('\s*(if)\s+\$\{(.*)\}\s*', key)
if m: if m:
if_count += 1 if_count += 1
if_name = '{}__if_{}'.format(name, if_count) if_name = '{}__if_{}'.format(name, if_count)
condition = m.group(2) condition = m.group(2)
else_branch = []
if_proc = IfProcedure.build(name=if_name, _async=False, if_config.put({
requests=request_config[key], 'name':if_name,
condition=condition, '_async':False,
else_branch=else_branch, 'requests':request_config[key],
backend=backend, id=id) 'condition':condition,
'else_branch':[],
'backend':backend,
'id':id,
})
reqs.append(if_proc) continue
if key == 'else':
if if_config.empty():
raise RuntimeError('else statement with no ' +
'associated if in {}'.format(name))
conf = if_config.get()
conf['else_branch'] = request_config[key]
if_config.put(conf)
if not if_config.empty():
reqs.append(IfProcedure.build(**(if_config.get())))
if key == 'else':
continue continue
request_config['origin'] = Config.get('device_id') request_config['origin'] = Config.get('device_id')
@ -88,7 +108,10 @@ class Procedure(object):
request = Request.build(request_config) request = Request.build(request_config)
reqs.append(request) reqs.append(request)
return cls(name=name, _async=_async, requests=reqs, args=args, backend=backend, **kwargs) if not if_config.empty():
reqs.append(IfProcedure.build(**(if_config.get())))
return procedure_class(name=name, _async=_async, requests=reqs, args=args, backend=backend, **kwargs)
def execute(self, n_tries=1, **context): def execute(self, n_tries=1, **context):
@ -197,10 +220,10 @@ class IfProcedure(Procedure):
context = {} context = {}
def __init__(self, name, condition, requests, else_branch=[], args=None, backend=None, id=None, **kwargs): def __init__(self, name, condition, requests, else_branch=None, args=None, backend=None, id=None, **kwargs):
kwargs['_async'] = False kwargs['_async'] = False
self.condition = condition self.condition = condition
self.else_branch = [] self.else_branch = else_branch
reqs = [] reqs = []
for req in requests: for req in requests:
@ -214,19 +237,19 @@ class IfProcedure(Procedure):
reqs.append(req) reqs.append(req)
for req in else_branch:
if isinstance(req, dict):
req['origin'] = Config.get('device_id')
req['id'] = id
if 'target' not in req:
req['target'] = req['origin']
req = Request.build(req)
self.else_branch.append(req)
super(). __init__(name=name, requests=reqs, args=args, backend=backend, **kwargs) super(). __init__(name=name, requests=reqs, args=args, backend=backend, **kwargs)
@classmethod
def build(cls, name, condition, requests, else_branch=None, args=None, backend=None, id=None, **kwargs):
kwargs['_async'] = False
if else_branch:
else_branch = super().build(name=name+'__else', requests=else_branch,
args=args, backend=backend, id=id,
procedure_class=Procedure, **kwargs)
return super().build(name=name, condition=condition, requests=requests,
else_branch=else_branch, args=args, backend=backend, id=id,
**kwargs)
def execute(self, **context): def execute(self, **context):
for (k, v) in context.items(): for (k, v) in context.items():
@ -245,12 +268,7 @@ class IfProcedure(Procedure):
if condition_true: if condition_true:
response = super().execute(**context) response = super().execute(**context)
elif self.else_branch: elif self.else_branch:
try: response = self.else_branch.execute(**context)
reqs = self.requests
self.requests = self.else_branch
response = super().execute(**context)
finally:
self.requests = reqs
return response return response