Which are you most happy slack channels?

slack-sentiment.go

package main

import (
	"fmt"
	"github.com/nlopes/slack"
	"strconv"
	"strings"
	"time"
)

type HappinessIndicator struct {
	Name  string
	Score int
}

func main() {
	smiles := []string{":-)", ":smile:", ":-D", ":joy:", ";-)", ":wink:"}
	api := slack.New("PUT HERE YOUR SLACK TOKEN")
	//api.SetDebug(true)

	channels, err := api.GetChannels(true)
	if err != nil {
		fmt.Printf("%s\n", err)
		return
	}
	for _, channel := range channels {
		params := slack.NewHistoryParameters()
		params.Count = 1000
		beginOfMonth, err := time.Parse("2006-01-02", "2015-10-01")
		params.Oldest = strconv.FormatInt(beginOfMonth.Unix(), 10)
		history, err := api.GetChannelHistory(channel.ID, params)
		if err != nil {
			fmt.Printf("%s\n", err)
			return
		}

		if len(history.Messages) == 0 {
			continue
		}

		happiness := 0
		for _, message := range history.Messages {
			for _, smile := range smiles {
				if strings.Contains(message.Text, smile) {
					happiness += 1
				}
			}
		}
		//fmt.Printf("%d smiles - %s ( %d messages sent ) \n", happiness, channel.Name, len(history.Messages))
		percent := (float32(happiness) / float32(len(history.Messages))) * 100.0
		fmt.Printf("%.2f %% of happy message on %s (%d messages) \n", percent, channel.Name, len(history.Messages))
	}
}