Add migration tool to project

internal/migrations/001_create_products_table.sql

@@ -0,0 +1,6 @@
+CREATE TABLE product (
+  id BIGSERIAL PRIMARY KEY,
+  name text NOT NULL,
+  price float,
+  purchase_date timestamp
+);

internal/migrator/db.go

@@ -0,0 +1,48 @@
+package migrator
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+
+	"github.com/jackc/pgx/v5"
+)
+
+func runMigration(ctx context.Context, db *pgx.Conn, migrationFile string) error {
+  fmt.Printf("MF: %s\n", migrationFile)
+	content, err := os.ReadFile(migrationFile)
+	if err != nil {
+		return fmt.Errorf("Failed to read migration file: %s", migrationFile)
+	}
+	_, err = db.Exec(ctx, string(content))
+	if err != nil {
+		return fmt.Errorf("Failed to execute migtation code: %s", err)
+	}
+
+	return nil
+}
+
+func Migrate(ctx context.Context, db *pgx.Conn) error {
+	workingDirectoryPath, err := os.Getwd()
+	if err != nil {
+		return fmt.Errorf("Failed to get current working directory in migrate tool")
+	}
+  migrationsPath := workingDirectoryPath + "/internal/migrations/"
+	files, err := os.ReadDir(migrationsPath)
+	if err != nil {
+		return fmt.Errorf("Failed to read migrations directory: %s", err)
+	}
+	for _, file := range files {
+		if filepath.Ext(file.Name()) == ".sql" {
+			migrationPath := filepath.Join(migrationsPath, file.Name())
+      fmt.Printf("Migration path: %s\n", migrationPath)
+			if err := runMigration(ctx, db, migrationPath); err != nil {
+				return err
+			}
+			log.Printf("Migration %s applied\n", file.Name())
+		}
+	}
+	return nil
+}

main.go

@@ -2,12 +2,11 @@ package main
 
 import (
 	"context"
-	// "fmt"
-	// "regexp"
-	// "strings"
-	// "t0xa/pdf_to_txt/internal/parser"
+	"log"
 
 	"github.com/jackc/pgx/v5"
+
+	"t0xa/pdf_to_txt/internal/migrator"
 )
 
 type CheckEntry struct {
@@ -19,8 +18,7 @@ func main() {
 	// TODO: Redo format of file passing to function
 	// text := parser.ParseX5Check("./internal/parser/testfiles/test3.pdf")
 	//
-	// split := strings.Split(text, "\n")
-	// stringsToFilter := "https://mail|Gmail - Электронный чек|Сумма|НДС"
+	// split := strings.Split(text, "\n") stringsToFilter := "https://mail|Gmail - Электронный чек|Сумма|НДС"
 	// re := regexp.MustCompile(stringsToFilter)
 	// filtered := []string{}
 	// for _, element := range split {
@@ -41,11 +39,33 @@ func main() {
 	// 	}
 	// }
 
-	ctx := context.Background()
+	// ctx := context.Background()
+	//
+	// conn, err := pgx.Connect(ctx, "postgres://ruprod_user:ruprod_password@localhost:5433/ruprod")
+	// if err != nil {
+	// 	panic(err)
+	// }
+	// defer conn.Close(ctx)
+	//
+	// queries := ruprod.New(conn)
+	// insertedProduct, err := queries.CreateProduct(ctx, ruprod.CreateProductParams{
+	// 	Name:         "Сырок",
+	// 	Price:        pgtype.Float8{Float64: 12.9, Valid: true},
+	// 	PurchaseDate: pgtype.Timestamp{Time: time.Now()},
+	// })
+	// if err != nil {
+	// 	panic(err)
+	// }
+	//  fmt.Println(insertedProduct)
 
-  conn, err := pgx.Connect(ctx, "postgres://ruprod_user:ruprod_password@localhost:5433")
+	ctx := context.Background()
+	conn, err := pgx.Connect(ctx, "postgres://ruprod_user:ruprod_password@localhost:5433/ruprod")
 	if err != nil {
 		panic(err)
 	}
 	defer conn.Close(ctx)
+
+	if err := migrator.Migrate(ctx, conn); err != nil {
+		log.Fatalf("Migration failed: %s", err)
+	}
 }