deps_mmr.go

package test_internals

import (
	"context"
	"errors"
	"fmt"
	"log"
	"os"
	"path"
	"strconv"
	"strings"
	"text/template"

	"github.com/docker/go-connections/nat"
	"github.com/testcontainers/testcontainers-go"
	"github.com/testcontainers/testcontainers-go/wait"
)

type mmrHomeserverTmplArgs struct {
	ServerName         string
	ClientServerApiUrl string
}

type mmrTmplArgs struct {
	Homeservers        []mmrHomeserverTmplArgs
	RedisAddr          string
	PgConnectionString string
}

type mmrContainer struct {
	ctx           context.Context
	container     testcontainers.Container
	tmpConfigPath string

	HttpUrl   string
	MachineId int
}

var mmrCachedImage string

func reuseMmrBuild(ctx context.Context) (string, error) {
	if mmrCachedImage != "" {
		return mmrCachedImage, nil
	}
	log.Println("[Test Deps] Building MMR image...")
	buildReq := testcontainers.GenericContainerRequest{
		ContainerRequest: testcontainers.ContainerRequest{
			FromDockerfile: testcontainers.FromDockerfile{
				Dockerfile:    "Dockerfile",
				Context:       ".",
				PrintBuildLog: true,
			},
		},
		Started: false,
	}
	provider, err := buildReq.ProviderType.GetProvider(testcontainers.WithLogger(testcontainers.Logger))
	if err != nil {
		return "", err
	}
	c, err := provider.CreateContainer(ctx, buildReq.ContainerRequest)
	if err != nil {
		return "", err
	}
	if dockerC, ok := c.(*testcontainers.DockerContainer); !ok {
		return "", errors.New("failed to convert built MMR container to a DockerContainer")
	} else {
		mmrCachedImage = dockerC.Image
	}
	log.Println("[Test Deps] Cached build as ", mmrCachedImage)
	return mmrCachedImage, nil
}

func makeMmrInstances(ctx context.Context, count int, depNet *NetworkDep, tmplArgs mmrTmplArgs) ([]*mmrContainer, error) {
	// Prepare a config template
	t, err := template.New("mmr.config.yaml").ParseFiles(path.Join(".", "test", "templates", "mmr.config.yaml"))
	if err != nil {
		return nil, err
	}
	w := new(strings.Builder)
	err = t.Execute(w, tmplArgs)
	if err != nil {
		return nil, err
	}

	// Write the MMR config to a temp file
	f, err := os.CreateTemp(os.TempDir(), "mmr-tests-mediarepo")
	if err != nil {
		return nil, err
	}
	_, err = f.Write([]byte(w.String()))
	if err != nil {
		return nil, err
	}
	err = f.Close()
	if err != nil {
		return nil, err
	}

	// Cache the MMR image
	mmrImage, err := reuseMmrBuild(ctx)
	if err != nil {
		return nil, err
	}

	// Start the containers (using the same DB and config)
	mmrs := make([]*mmrContainer, 0)
	for i := 0; i < count; i++ {
		// Create the docker container (from dockerfile)
		p, _ := nat.NewPort("tcp", "8000")
		container, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{
			ContainerRequest: testcontainers.ContainerRequest{
				Image:        mmrImage,
				ExposedPorts: []string{"8000/tcp"},
				Mounts: []testcontainers.ContainerMount{
					testcontainers.BindMount(f.Name(), "/data/media-repo.yaml"),
				},
				Env: map[string]string{
					"MACHINE_ID": strconv.Itoa(i),
				},
				Networks:   []string{depNet.NetId},
				WaitingFor: wait.ForHTTP("/healthz").WithPort(p),
			},
			Started: true,
		})
		if err != nil {
			return nil, err
		}

		// Get the http url
		mmrHost, err := container.Host(ctx)
		if err != nil {
			return nil, err
		}
		mmrPort, err := container.MappedPort(ctx, "8000/tcp")
		if err != nil {
			return nil, err
		}
		//goland:noinspection HttpUrlsUsage
		csApiUrl := fmt.Sprintf("http://%s:%d", mmrHost, mmrPort.Int())
		log.Println("@@@@@@@@@@@@@@@@@@@@@@ ", csApiUrl)

		// Create the container object
		mmrs = append(mmrs, &mmrContainer{
			ctx:           ctx,
			container:     container,
			tmpConfigPath: f.Name(),
			HttpUrl:       csApiUrl,
			MachineId:     i,
		})
	}

	return mmrs, nil
}

func (c *mmrContainer) Teardown() {
	if err := c.container.Terminate(c.ctx); err != nil {
		log.Fatalf("Error shutting down MMR machine %d: %s", c.MachineId, err.Error())
	}
	if err := os.Remove(c.tmpConfigPath); err != nil && !os.IsNotExist(err) {
		log.Fatalf("Error cleaning up MMR config file '%s': %s", c.tmpConfigPath, err.Error())
	}
}