add app state, and fix a few bugs

internal/models/volume.go

@@ -0,0 +1,46 @@
+package models
+
+import (
+	"context"
+	"database/sql"
+
+	docker "github.com/juls0730/flux/internal/docker"
+	"go.uber.org/zap"
+)
+
+type Volume struct {
+	ID int64 `json:"id"`
+	docker.DockerVolume
+	ContainerID int64 `json:"container_id"`
+}
+
+// Creates a volume for a container, does not insert it into the database
+func CreateVolume(ctx context.Context, mountpoint string, dockerClient *docker.DockerClient, logger *zap.SugaredLogger) (*Volume, error) {
+	logger.Debugw("Creating volume", zap.String("mountpoint", mountpoint))
+
+	dockerVol, err := dockerClient.CreateDockerVolume(ctx)
+	if err != nil {
+		logger.Errorw("Failed to create volume", zap.Error(err))
+		return nil, err
+	}
+
+	dockerVol.Mountpoint = mountpoint
+
+	vol := &Volume{
+		DockerVolume: *dockerVol,
+	}
+
+	return vol, nil
+}
+
+func (v *Volume) Remove(ctx context.Context, dockerClient *docker.DockerClient, db *sql.DB, logger *zap.SugaredLogger) error {
+	logger.Debugw("Removing volume", zap.String("volume_id", v.VolumeID))
+
+	_, err := db.ExecContext(ctx, "DELETE FROM volumes WHERE volume_id = ?", v.VolumeID)
+	if err != nil {
+		logger.Errorw("Failed to delete volume", zap.Error(err))
+		return err
+	}
+
+	return dockerClient.DeleteDockerVolume(ctx, v.VolumeID)
+}