This example shows how piping states between machines works.
Scroll down to see the log output.
https://github.com/TobiaszCudnik/asyncmachine
const { machine, PipeFlags } = require('asyncmachine')
const foo = machine({
A: {},
B: {}
})
.id('foo')
.logLevel(2)
const bar = machine({
AA: {},
NotB: {}
})
.id('bar')
.logLevel(2)
const baz = machine({
NotB: {}
})
.id('baz')
.logLevel(2)
console.log('\ncreate the pipes (and sync the state)\n')
foo.pipe('A', bar, 'AA')
foo.pipe('B', baz, 'NotB', PipeFlags.INVERT)
baz.pipe('NotB', bar, 'NotB')
console.log('\n start mutating [foo] only, and others will follow \n')
foo.add('A')
foo.add('B')
foo.drop('B')
Console output:
create the pipes (and sync the state)
[foo] [pipe] 'A' as 'AA' to 'bar'
[bar] [drop] AA
[foo] [pipe:invert] 'B' as 'NotB' to 'baz'
[baz] [add] NotB
[baz] [state] +NotB
[baz] [pipe] 'NotB' as 'NotB' to 'bar'
[bar] [add] NotB
[bar] [state] +NotB
start mutating [foo] only, and others will follow
[foo] [add] A
[foo] [state] +A
[bar] [add] AA
[bar] [state] +AA
[foo] [add] B
[foo] [state] +B
[baz] [drop] NotB
[baz] [state] -NotB
[bar] [drop] NotB
[bar] [state] -NotB
[foo] [drop] B
[foo] [state] -B
[baz] [add] NotB
[baz] [state] +NotB
[bar] [add] NotB
[bar] [state] +NotB
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