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flow.go
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flow.go
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//
// Copyright © 2018 Aljabr, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package flow
import "github.com/kocircuit/kocircuit/lang/circuit/model"
type Envelope interface {
Enter(*model.Span) (Flow, error) // Enter returns the output of the Enter step of the enclosing function.
Make(*model.Span, interface{}) (Flow, error) // Make ...
MakePkgFunc(*model.Span, string, string) (Flow, error) // MakePkgFunc ...
MakeOp(*model.Span, []string) (Flow, error) // MakeOp ...
}
type Flow interface {
Link(*model.Span, string, bool) (Flow, error) // Link ...
Select(*model.Span, []string) (Flow, error) // Select ...
Augment(*model.Span, []GatherFlow) (Flow, error) // Augment ...
Invoke(*model.Span) (Flow, error) // Invoke ...
Leave(*model.Span) (Flow, error) // Leave ...
}
type GatherFlow struct {
Field string
Flow Flow
}
func PlaySeqFlow(span *model.Span, f *model.Func, env Envelope) (Flow, []Flow, error) {
p := &flowPlayer{span: model.RefineFunc(span, f), fun: f, env: env}
stepReturn, err := playSeq(f, p)
if err != nil {
return nil, nil, err
}
return stepReturnFlow(f, stepReturn)
}
func PlayParFlow(span *model.Span, f *model.Func, env Envelope) (Flow, []Flow, error) {
p := &flowPlayer{span: model.RefineFunc(span, f), fun: f, env: env}
stepReturn, err := playPar(f, p)
if err != nil {
return nil, nil, err
}
return stepReturnFlow(f, stepReturn)
}
func stepReturnFlow(f *model.Func, stepReturn map[*model.Step]Edge) (Flow, []Flow, error) {
stepFlow := []Flow{}
for _, step := range f.Step {
stepFlow = append(stepFlow, stepReturn[step].(Flow))
}
return stepReturn[f.Leave].(Flow), stepFlow, nil
}