goflow

Goflow

Specification

See https://nyaruka.github.io/goflow/ for the complete specification docs.

Basic Usage

import (
    "github.com/nyaruka/goflow/assets/static"
    "github.com/nyaruka/goflow/flows"
    "github.com/nyaruka/goflow/flows/engine"
    "github.com/nyaruka/goflow/utils"
)

source, _ := static.LoadStaticSource("myassets.json")
assets, _ := engine.NewSessionAssets(source)
session := engine.NewSession(assets, engine.NewDefaultConfig(), utils.NewHTTPClient("goflow-flowrunner"))
contact := flows.NewContact(...)
trigger := triggers.NewManualTrigger(utils.NewDefaultEnvironment(), contact, flow.Reference(), nil, time.Now())
session.Start(trigger)

Runner

This program provides a command line interface for stepping through a given flow.

% go install github.com/nyaruka/goflow/cmd/flowrunner
% $GOPATH/bin/flowrunner cmd/flowrunner/testdata/two_questions.json 615b8a0f-588c-4d20-a05f-363b0b4ce6f4
Starting flow 'U-Report Registration Flow'....
---------------------------------------
💬 "Hi Ben Haggerty! What is your favorite color? (red/blue) Your number is (206) 555-1212"
⏳ waiting for message....

By default it will use a manual trigger to create a session, but the -msg flag can be used to start the session with a message trigger:

% $GOPATH/bin/flowrunner -msg "hi there" cmd/flowrunner/testdata/two_questions.json 615b8a0f-588c-4d20-a05f-363b0b4ce6f4

If the -repro flag is set, it will dump the triggers and resumes it used which can be used to reproduce the session in a test:

% $GOPATH/bin/flowrunner -repro cmd/flowrunner/testdata/two_questions.json 615b8a0f-588c-4d20-a05f-363b0b4ce6f4

Server

This server provides an HTTP endpoint for stepping through a given flow:

% go install github.com/nyaruka/goflow/cmd/flowserver
% $GOPATH/bin/flowserver

Expression Tester

This utility provides a quick way to test evaluation of expressions which can be used in flows:

% go install github.com/nyaruka/goflow/cmd/exptester
% $GOPATH/bin/exptester '@(10 / 5 >= 2)'
% $GOPATH/bin/exptester '@(TITLE("foo"))'

Development

You can run the flow server with detailed output of actions being executed and events being applied with:

% $GOPATH/bin/flowserver --log-level=debug

You can run all the tests with:

% go test github.com/nyaruka/goflow/...

If you've made changes to the flow server response format, regenerate the test files with:

% go test github.com/nyaruka/goflow/test -write

If you've made changes to the flow server static files, you should regenerate the statik module with:

% go generate github.com/nyaruka/goflow/cmd/flowserver

To make a new release:

% git tag v?.?.?
% git push origin v?.?.?
% goreleaser