feat: implement Azure Blob Storage client and refactor configuration structure

internal/app/azure/main.go

@@ -0,0 +1,68 @@
+package azure
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net/url"
+
+	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
+	"github.com/Azure/azure-sdk-for-go/sdk/storage/azblob"
+)
+
+var (
+	ErrInvalidConnectionString = errors.New("invalid connection string")
+	ErrContainerNotFound       = errors.New("container not found")
+	ErrBlobNotFound            = errors.New("blob not found")
+	ErrInvalidInput            = errors.New("invalid input parameters")
+)
+
+type Client struct {
+	client             *azblob.Client
+	azureStorageConfig config.AzureStorageConfig
+}
+
+func NewClient(azureStorageConfig config.AzureStorageConfig) (*Client, error) {
+	protocol := "https"
+	if !azureStorageConfig.UseHTTPS {
+		protocol = "http"
+	}
+
+	blobEndpoint, _ := url.JoinPath(azureStorageConfig.ServiceURL, azureStorageConfig.AccountName)
+	connStr := fmt.Sprintf("DefaultEndpointsProtocol=%s;AccountName=%s;AccountKey=%s;BlobEndpoint=%s;",
+		protocol, azureStorageConfig.AccountName, azureStorageConfig.AccountKey, blobEndpoint)
+
+	client, err := azblob.NewClientFromConnectionString(connStr, nil)
+	if err != nil {
+		return nil, fmt.Errorf("creating azure storage client: %w", err)
+	}
+
+	return &Client{
+		client:             client,
+		azureStorageConfig: azureStorageConfig,
+	}, nil
+}
+
+func (c *Client) CreateContainer(ctx context.Context, containerName string) error {
+	if containerName == "" {
+		return ErrInvalidInput
+	}
+
+	_, err := c.client.CreateContainer(ctx, containerName, nil)
+	if err != nil {
+		return fmt.Errorf("creating container %s: %w", containerName, err)
+	}
+	return nil
+}
+
+func (c *Client) UploadBuffer(ctx context.Context, containerName, blobPath string, buffer []byte) error {
+	if containerName == "" || blobPath == "" || buffer == nil {
+		return ErrInvalidInput
+	}
+
+	_, err := c.client.UploadBuffer(ctx, containerName, blobPath, buffer, nil)
+	if err != nil {
+		return fmt.Errorf("uploading blob %s: %w", blobPath, err)
+	}
+	return nil
+}

internal/app/config/main.go

@@ -6,7 +6,7 @@ import (
 	log "github.com/sirupsen/logrus"
 )
 
-type AzureConfig struct {
+type AzureStorageConfig struct {
 	AccountName string `env:"AZ_ACCOUNT_NAME"`
 	Container   string `env:"AZ_CONTAINER"`
 	AccountKey  string `env:"AZ_ACCOUNT_KEY"`
@@ -17,10 +17,10 @@ type AzureConfig struct {
 }
 
 type appConfig struct {
-	SourceDbUrl string `env:"SOURCE_DB_URL,required"`
-	TargetDbUrl string `env:"TARGET_DB_URL,required"`
-	LogLevel    string `env:"LOG_LEVEL" envDefault:"INFO"`
-	Azure       AzureConfig
+	SourceDbUrl  string `env:"SOURCE_DB_URL,required"`
+	TargetDbUrl  string `env:"TARGET_DB_URL,required"`
+	LogLevel     string `env:"LOG_LEVEL" envDefault:"INFO"`
+	AzureStorage AzureStorageConfig
 }
 
 func getAppConfig() appConfig {