reaction/conf.go

package main

import (
	// "flag"
	"fmt"
	"log"
	"os"
	"regexp"
	"time"

	"gopkg.in/yaml.v3"
)

type Conf struct {
	Streams map[string]Stream
}

type Stream struct {
	Cmd     []string
	Filters map[string]*Filter
}

type Filter struct {
	Regex         []string
	compiledRegex []regexp.Regexp // Computed after YAML parsing
	Retry         uint
	RetryPeriod   string `yaml:"retry-period"`
	retryDuration time.Duration // Computed after YAML parsing
	Actions       map[string]*Action
}

type Action struct {
	name, filterName, streamName string // Computed after YAML parsing
	Cmd                          []string
	After                        string `yaml:",omitempty"`
	afterDuration                time.Duration // Computed after YAML parsing
}

func (c *Conf) setup() {
	for streamName, stream := range c.Streams {
		for filterName, filter := range stream.Filters {

			// Parse Duration
			retryDuration, err := time.ParseDuration(filter.RetryPeriod)
			if err != nil {
				log.Fatalln("Failed to parse time in configuration file:", err)
			}
			filter.retryDuration = retryDuration

			// Compute Regexes
			for _, regex := range filter.Regex {
				filter.compiledRegex = append(filter.compiledRegex, *regexp.MustCompile(regex))
			}

			for actionName, action := range filter.Actions {

				// Give all relevant infos to Actions
				action.name = actionName
				action.filterName = filterName
				action.streamName = streamName

				// Parse Duration
				if action.After != "" {
					afterDuration, err := time.ParseDuration(action.After)
					if err != nil {
						log.Fatalln("Failed to parse time in configuration file:", err)
					}
					action.afterDuration = afterDuration
				}
			}
		}
	}
}

func parseConf(filename string) *Conf {

	data, err := os.ReadFile(filename)

	if err != nil {
		log.Fatalln("Failed to read configuration file:", err)
	}

	var conf Conf
	err = yaml.Unmarshal(data, &conf)
	if err != nil {
		log.Fatalln("Failed to parse configuration file:", err)
	}

	conf.setup()
	fmt.Printf("conf.Streams[0].Filters[0].Actions: %s\n", conf.Streams["tailDown"].Filters["lookForProuts"].Actions)

	return &conf
}

func parseArgs() map[string]string {
	var args map[string]string
	return args
}