oklahomer/go-sarah

// Package count provides an example to set up sarah.CommandProps.
//
// One counter instance is shared between two CommandPropsBuilder.Func,
// which means both Slack command and Gitter command access to the same counter instance.
// This illustrates that, when multiple Bots are registered to Runner, same memory space can be shared.
package count

import (
    "context"
    "fmt"
    "github.com/oklahomer/go-sarah/v4"
    "github.com/oklahomer/go-sarah/v4/gitter"
    "github.com/oklahomer/go-sarah/v4/slack"
    "regexp"
    "sync"
)

func init() {
    sarah.RegisterCommandProps(SlackProps)
    sarah.RegisterCommandProps(GitterProps)
}

type counter struct {
    count uint
    mutex *sync.Mutex
}

func (c *counter) increment() uint {
    c.mutex.Lock()
    defer c.mutex.Unlock()
    c.count++
    return c.count
}

// globalCounter is a counter instance that is shared by both Slack command and Gitter command.
var globalCounter = &counter{
    count: 0,
    mutex: &sync.Mutex{},
}

// SlackProps is a pre-built count command properties for Slack.
var SlackProps = sarah.NewCommandPropsBuilder().
    BotType(slack.SLACK).
    Identifier("counter").
    Instruction("Input .count to count up").
    MatchPattern(regexp.MustCompile(`^\.count`)).
    Func(func(_ context.Context, input sarah.Input) (*sarah.CommandResponse, error) {
        return slack.NewResponse(input, fmt.Sprint(globalCounter.increment()))
    }).
    MustBuild()

// GitterProps is a pre-built count command properties for Slack.
var GitterProps = sarah.NewCommandPropsBuilder().
    BotType(gitter.GITTER).
    Identifier("counter").
    Instruction("Input .count to count up").
    MatchPattern(regexp.MustCompile(`^\.count`)).
    Func(func(_ context.Context, _ sarah.Input) (*sarah.CommandResponse, error) {
        return gitter.NewResponse(fmt.Sprint(globalCounter.increment()))
    }).
    MustBuild()