modul2

.env

@@ -0,0 +1,13 @@
+# Server Configuration
+# --------------------
+PORT=4000
+ENVIRONMENT=dev # Options: dev, stage, prod
+
+# -----------------------------------------
+# PostgreSQL Database Configuration
+DB_HOST=localhost
+DB_PORT=5432
+DB USER=postgres
+DB_PASSWORD=pw5803025020
+DB_NAME=user5803025020
+DB_SSLMODE=disable #t'disable' or 'require'

cmd/server/main.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"5803025020/w04/internal/config"
+	"5803025020/w04/internal/database"
+	"5803025020/w04/internal/models"
+
+)
+
+func main() {
+	err := config.LoadEnv()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error loading environment variables: %v\n", err)
+		os.Exit(1)
+	}
+
+	// urlExample := "postgres://username:password@localhost:5432/database_name"
+	conn, err := pgx.Connect(context.Background(), os.Getenv("DATABASE_URL"))
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Unable to connect to database: %v\n", err)
+		os.Exit(1)
+	}
+	defer conn.Close(context.Background())
+
+	var name string
+	var weight int64
+	err = conn.QueryRow(context.Background(), "select name, weight from widgets where id=$1", 42).Scan(&name, &weight)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "QueryRow failed: %v\n", err)
+		os.Exit(1)
+	}
+
+	fmt.Println(name, weight)
+}

go.mod

@@ -1,3 +1,11 @@
 module 5803025020/w04
 
 go 1.26.6
+
+require (
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
+	github.com/jackc/pgx/v5 v5.11.0 // indirect
+	github.com/joho/godotenv v1.5.1 // indirect
+	golang.org/x/text v0.29.0 // indirect
+)

go.sum

@@ -0,0 +1,17 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsIM=
+github.com/jackc/pgpassfile v1.0.0/go.mod h1:CEx0iS5ambNFdcRtxPj5JhEz+xB6uRky5eyVu/W2HEg=
+github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 h1:iCEnooe7UlwOQYpKFhBabPMi4aNAfoODPEFNiAnClxo=
+github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761/go.mod h1:5TJZWKEWniPve33vlWYSoGYefn3gLQRzjfDlhSJ9ZKM=
+github.com/jackc/pgx/v5 v5.11.0 h1:IzBBtyK9AHqf98cctWFifYSci2hgQR/cd56wB4p+ogg=
+github.com/jackc/pgx/v5 v5.11.0/go.mod h1:mal1tBGAFfLHvZzaYh77YS/eC6IX9OWbRV1QIIM0Jn4=
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+golang.org/x/text v0.29.0 h1:1neNs90w9YzJ9BocxfsQNHKuAT4pkghyXc4nhZ6sJvk=
+golang.org/x/text v0.29.0/go.mod h1:7MhJOA9CD2qZyOKYazxdYMF85OwPdEr9jTtBpO7ydH4=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

internal/config/config.go

@@ -0,0 +1,14 @@
+package config
+
+import (
+	"fmt"
+	"github.com/joho/godotenv"
+)
+
+func LoadEnv() error {
+	err := godotenv.Load()
+	if err != nil {
+		return fmt.Errorf("error loading .env file: %w", err)
+	}
+	return nil
+}

internal/database/database.go

@@ -0,0 +1,17 @@
+package database
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"github.com/jackc/pgx/v5"
+	)
+
+func Connect() (*pgx.Conn, error) {
+	conn, err := pgx.Connect(context.Background(), os.Getenv("DATABASE_URL"))
+	if err != nil {
+		return nil, fmt.Errorf("unable to connect to database: %w", err)
+	}
+	return conn, nil
+	}

internal/models/models.go

@@ -0,0 +1,12 @@
+package models
+
+import (
+	"time"
+)
+
+type Snippet struct {
+	ID        int       `json:"id"`
+	Title     string    `json:"title"`
+	Content   string    `json:"content"`
+	CreatedAt time.Time `json:"created_at"`
+}