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August 30, 2020 20:03
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const request = (context) => {}; | |
const build_request_params = () => {}; | |
const make_signal = (context) => { | |
const controller = new AbortController(); | |
context.signal = controller.signal; | |
} | |
const abort_request = (context) => { | |
return context.signal.abort; | |
} | |
const build_params = (context) => build_request_params(context); | |
const update_context = assign({retries: (context) => context.retries + 1}); | |
const can_retry = (context) => context.retries < context.max_retries; | |
const default_context = { | |
endpoint: null, | |
headers: {}, | |
method: 'GET', | |
data: null, | |
data_type: 'json', | |
timeout: 1000, | |
max_retries: 5, | |
retries: 0, | |
retry_throttle: [ | |
0, | |
1000, | |
3000, | |
10000, | |
30000, | |
], | |
signal: null, | |
api_request: true, | |
versioned: true, | |
authenticated: true, | |
handle_errors: true, | |
result: null, | |
error: null, | |
}; | |
const request_machine = Machine({ | |
id: 'request', | |
initial: 'idle', | |
context: default_context, | |
states: { | |
idle: { | |
on: { | |
'fetch': 'build' | |
} | |
}, | |
build: { | |
on: { | |
'': { | |
target: 'loading', | |
actions: [ | |
'make_signal', | |
'build_params', | |
] | |
}, | |
'cancel': 'cancelled' | |
} | |
}, | |
loading: { | |
on: { | |
'cancel': 'cancelled', | |
'resolve': 'success', | |
'reject': 'failure' | |
}, | |
invoke: { | |
src: (context) => request(context), | |
onDone: { | |
target: 'success', | |
actions: assign({ result: (context, event) => event.data }) | |
}, | |
onError: { | |
target: 'failure', | |
actions: assign({ error: (context, event) => event.data }) | |
} | |
} | |
}, | |
failure: { | |
on: { | |
'': [{ | |
target: 'loading', | |
actions: 'update_context', | |
cond: 'can_retry' | |
}, { | |
target: 'error' | |
}], | |
'cancel': 'cancelled' | |
} | |
}, | |
success: { | |
type: 'final' | |
}, | |
cancelled: { | |
type: 'final' | |
}, | |
error: { | |
type: 'final' | |
} | |
} | |
}, | |
{ | |
actions: { | |
make_signal, | |
build_params, | |
update_context, | |
abort_request | |
}, | |
activities: {}, | |
guards: { | |
can_retry, | |
}, | |
services: {} | |
}); |
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