Early stages of the storage classes/decouplers for receipts and such

Signed-off-by: Ethan Wellenreiter <ewellenreiter@gmail.com>

backend/internal/storage/images.go

@@ -0,0 +1,8 @@
+package storage
+
+type Image struct {
+	ID        int64  `json:"id"`
+	ReceiptID string `json:"receipt_id"`
+	CreatedAt string `json:"created_at"`
+	Path      string `json:"path"`
+}

backend/internal/storage/local_user.go

@@ -0,0 +1 @@
+package storage

backend/internal/storage/receipts.go

@@ -0,0 +1,20 @@
+package storage
+
+import "time"
+
+type Receipt struct {
+	ID       int64       `json:"id"`
+	Owner    string      `json:"username"`
+	OwnerID  int64       `json:"user_id"`
+	ImageIDs []int64     `json:"image_ids"`
+	Data     ReceiptData `json:"receipt_data"`
+}
+
+type ReceiptData struct {
+	Date     time.Time          `json:"date"`
+	Subtotal float64            `json:"subtotal"`
+	Total    float64            `json:"total"`
+	Tax      float64            `json:"tax"`
+	Items    map[string]float64 `json:"items"`
+	// Currency string `json:"currency"`
+}

backend/internal/storage/session.go

@@ -1,9 +0,0 @@
-package storage
-
-import "time"
-
-type SessionStore interface {
-	AddSession(sessKey string) error
-	RemoveSession(sessKey string) error
-	SetLifespan(sessKey string, lf time.Time) error
-}

backend/internal/storage/storage.go

@@ -0,0 +1,38 @@
+package storage
+
+import (
+	"context"
+	"database/sql"
+)
+
+type Storage struct {
+	Receipts interface {
+		GetByID(context.Context, int64) (*Receipt, error)
+	}
+	Users interface {
+		AddUser(user string, password string) error
+		RemoveUser(user string, password string) error
+		UpdateUserPass(user string, oldPassword string, newPass string) error
+	}
+	Images interface {
+		GetByID(context.Context, int64) (*Image, error)
+	}
+}
+
+func NewSQLStorage(db *sql.DB) Storage {
+	return Storage{}
+}
+
+func withTx(db *sql.DB, ctx context.Context, fn func(*sql.Tx) error) error {
+	tx, err := db.BeginTx(ctx, nil)
+	if err != nil {
+		return err
+	}
+
+	if err := fn(tx); err != nil {
+		_ = tx.Rollback()
+		return err
+	}
+
+	return tx.Commit()
+}

backend/internal/storage/user.go

@@ -1,7 +0,0 @@
-package storage
-
-type UserStore interface {
-	AddUser(user string, password string) error
-	RemoveUser(user string, password string) error
-	UpdateUserPass(user string, password string) error
-}