oklahomer/go-sarah

// Package morning provides an example to set up sarah.CommandProps with a relatively complex matching function.
//
// This setting does not simply provide a regular expression via CommandPropsBuilder.MatchPattern,
// but instead provide the whole matching function to implement a complex matcher.
package morning

import (
    "context"
    "github.com/oklahomer/go-sarah/v4"
    "github.com/oklahomer/go-sarah/v4/slack"
    "strings"
    "time"
)

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

// SlackProps is a pre-built morning command properties for Slack.
var SlackProps = sarah.NewCommandPropsBuilder().
    BotType(slack.SLACK).
    Identifier("morning").
    InstructionFunc(func(input *sarah.HelpInput) string {
        hour := time.Now().Hour()
        if 12 < hour {
            // This command is only active in the morning.
            // Do not show instruction in the afternoon.
            return ""
        }

        return "Input .morning to greet."
    }).
    MatchFunc(func(input sarah.Input) bool {
        // 1. See if the input message starts with ".morning"
        match := strings.HasPrefix(input.Message(), ".morning")
        if !match {
            return false
        }

        // 2. See if the current time is between 00:00 - 11:59
        hour := time.Now().Hour()
        return hour >= 0 && hour < 12
    }).
    Func(func(_ context.Context, input sarah.Input) (*sarah.CommandResponse, error) {
        return slack.NewResponse(input, "Good morning.")
    }).
    MustBuild()