mailcow-admin-aliases/internal/mailcow/domains.go

package mailcow

import (
	"encoding/json"
	"fmt"
	"io"
	"log/slog"
	"net/http"
	"os"
	"time"

	"code.lila.network/adoralaura/mailcow-admin-aliases/internal/configuration"
)

type MailcowDomain struct {
	DomainName string `json:"domain_name"`
}

func LoadDomains(cfg configuration.Config) ([]MailcowDomain, error) {
	var domains []MailcowDomain

	url := cfg.ApiEndpoint + configuration.AllDomainsApiEndpoint
	method := "GET"

	client := &http.Client{Timeout: 10 * time.Second}
	req, err := http.NewRequest(method, url, nil)
	slog.Debug("domain request", "method", method, "url", url)

	if err != nil {
		return []MailcowDomain{}, fmt.Errorf("failed to create http request: %w", err)
	}
	req.Header.Add("accept", "application/json")
	req.Header.Add("X-API-Key", cfg.ApiKey)

	res, err := client.Do(req)
	if err != nil {
		return []MailcowDomain{}, fmt.Errorf("failed to request domains from server: %w", err)
	}
	defer res.Body.Close()

	if res.StatusCode != 200 {
		slog.Error("API request unsuccessful", "status", res.Status, "status-code", res.StatusCode)
		os.Exit(1)
	}

	slog.Debug("domain response received", "status", res.Status, "status-code", res.StatusCode)

	body, err := io.ReadAll(res.Body)

	if err != nil {
		return []MailcowDomain{}, fmt.Errorf("failed to read domain request body: %w", err)
	}

	err = json.Unmarshal(body, &domains)
	if err != nil {
		return []MailcowDomain{}, fmt.Errorf("failed to unmarshal domain request body: %w", err)
	}

	return domains, nil
}