forked from platypush/platypush
Implemented support for else statements in if(s)
This commit is contained in:
Fabio Manganiello
parent
a4de4933df
commit
38fdb8be08
1 changed files with 46 additions and 28 deletions
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@ -1,6 +1,7 @@
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import logging
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import re
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from queue import LifoQueue
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from ..config import Config
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from ..message.request import Request
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from ..message.response import Response
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@ -31,10 +32,12 @@ class Procedure(object):
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@classmethod
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def build(cls, name, _async, requests, args=None, backend=None, id=None, **kwargs):
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def build(cls, name, _async, requests, args=None, backend=None, id=None, procedure_class=None, **kwargs):
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reqs = []
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loop_count = 0
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if_count = 0
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if_config = LifoQueue()
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procedure_class = procedure_class or cls
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for request_config in requests:
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# Check if this request is a for loop
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@ -65,21 +68,38 @@ class Procedure(object):
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if len(request_config.keys()) >= 1:
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key = list(request_config.keys())[0]
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m = re.match('\s*(if)\s+\$\{(.*)\}\s*', key)
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if m:
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if_count += 1
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if_name = '{}__if_{}'.format(name, if_count)
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condition = m.group(2)
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else_branch = []
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if_proc = IfProcedure.build(name=if_name, _async=False,
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requests=request_config[key],
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condition=condition,
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else_branch=else_branch,
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backend=backend, id=id)
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if_config.put({
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'name':if_name,
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'_async':False,
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'requests':request_config[key],
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'condition':condition,
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'else_branch':[],
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'backend':backend,
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'id':id,
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})
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reqs.append(if_proc)
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continue
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if key == 'else':
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if if_config.empty():
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raise RuntimeError('else statement with no ' +
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'associated if in {}'.format(name))
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conf = if_config.get()
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conf['else_branch'] = request_config[key]
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if_config.put(conf)
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if not if_config.empty():
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reqs.append(IfProcedure.build(**(if_config.get())))
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if key == 'else':
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continue
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request_config['origin'] = Config.get('device_id')
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request_config['id'] = id
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if 'target' not in request_config:
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@ -88,7 +108,10 @@ class Procedure(object):
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request = Request.build(request_config)
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reqs.append(request)
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return cls(name=name, _async=_async, requests=reqs, args=args, backend=backend, **kwargs)
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if not if_config.empty():
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reqs.append(IfProcedure.build(**(if_config.get())))
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return procedure_class(name=name, _async=_async, requests=reqs, args=args, backend=backend, **kwargs)
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def execute(self, n_tries=1, **context):
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@ -197,10 +220,10 @@ class IfProcedure(Procedure):
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context = {}
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def __init__(self, name, condition, requests, else_branch=[], args=None, backend=None, id=None, **kwargs):
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def __init__(self, name, condition, requests, else_branch=None, args=None, backend=None, id=None, **kwargs):
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kwargs['_async'] = False
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self.condition = condition
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self.else_branch = []
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self.else_branch = else_branch
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reqs = []
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for req in requests:
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@ -214,19 +237,19 @@ class IfProcedure(Procedure):
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reqs.append(req)
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for req in else_branch:
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if isinstance(req, dict):
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req['origin'] = Config.get('device_id')
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req['id'] = id
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if 'target' not in req:
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req['target'] = req['origin']
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req = Request.build(req)
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self.else_branch.append(req)
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super(). __init__(name=name, requests=reqs, args=args, backend=backend, **kwargs)
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@classmethod
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def build(cls, name, condition, requests, else_branch=None, args=None, backend=None, id=None, **kwargs):
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kwargs['_async'] = False
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if else_branch:
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else_branch = super().build(name=name+'__else', requests=else_branch,
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args=args, backend=backend, id=id,
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procedure_class=Procedure, **kwargs)
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return super().build(name=name, condition=condition, requests=requests,
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else_branch=else_branch, args=args, backend=backend, id=id,
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**kwargs)
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def execute(self, **context):
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for (k, v) in context.items():
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@ -245,12 +268,7 @@ class IfProcedure(Procedure):
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if condition_true:
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response = super().execute(**context)
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elif self.else_branch:
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try:
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reqs = self.requests
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self.requests = self.else_branch
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response = super().execute(**context)
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finally:
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self.requests = reqs
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response = self.else_branch.execute(**context)
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return response
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