item.go

package main

import (
	"fmt"
	"regexp"
	"strconv"
	"strings"
	"time"
)

const (
	TimeFormat = "2006-01-02 15:04:05"
)

var (
	reItemKeyParams = regexp.MustCompile(`\[([^\]]+)\]`)
)

type Item struct {
	ID        string      `json:"itemid"`
	HostID    string      `json:"hostid"`
	Name      string      `json:"name"`
	ValueType string      `json:"value_type"`
	LastValue string      `json:"lastvalue"`
	LastClock interface{} `json:"lastclock"`
	Key       string      `json:"key_"`
	Type      ItemType    `json:"type"`
}

func (item *Item) DateTime() string {
	if item.getLastClock() == "0" {
		return "-"
	}

	return item.date().Format(TimeFormat)
}

func (item *Item) getLastClock() string {
	switch typed := item.LastClock.(type) {
	case string:
		return typed
	case float64:
		return fmt.Sprint(int64(typed))
	default:
		fatalf("unexpected type '%v' for lastclock in item ID %s (%s)\nplease file a bug report.", typed, item.ID, item.Name)
		return "error"
	}
}

func (item *Item) date() time.Time {
	date, err := strconv.ParseInt(item.getLastClock(), 10, 64)
	if err != nil {
		debugf("Error: %+v", err)
	}
	return time.Unix(date, 0)
}

func (item *Item) Format() string {
	name := item.Name

	match := reItemKeyParams.FindStringSubmatch(item.Key)
	if len(match) == 0 {
		return name
	}

	args := strings.Split(match[1], ",")
	for index, arg := range args {
		name = strings.Replace(name, fmt.Sprintf(`$%d`, index+1), arg, -1)
	}

	return name
}