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title = "Workflow"
name = "workflow"
repository = "https://git.neonxp.ru/workflow.git"
description = "Простой конечный автомат для Go"
outputs = ["html", "go"]
+++
# Workflow for Go
[](https://godoc.org/github.com/neonxp/workflow)
Simple state machine. Inspired by [Symfony Workflow](https://github.com/symfony/workflow).
## Example usage
```go
o := new(ObjectImplementedPlaceer)
w := NewWorkflow("Start")
w.AddTransition("Start", "A")
w.AddTransition("Start", "B")
w.AddTransition("A", "C")
w.AddTransition("B", "D")
w.AddTransition( "C", "D")
w.AddTransition("C", "Finish")
w.AddTransition("D", "Finish")
w.Can(o, "A") // == nil
w.Can(o, "C") // == ErrTransitionNotFound
w.GetEnabledTransitions(o) // []Place{"A", "B"}
w.Apply(o, "A") // o now at "A" place
w.GetEnabledTransitions(o) // []Place{"C"}
w.DumpToDot() // See above
```
## Dump result
```
digraph {
Start[color="blue"]
Start -> A[label="Start → A"];
Start -> B[label="Start → B"];
A -> C[label="A → C"];
B -> D[label="B → D"];
C -> D[label="C → D"];
C -> Finish[label="C → Finish"];
D -> Finish[label="D → Finish"];
}
```
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