feat: add db management scripts

scripts/seed-db/main.go

@@ -0,0 +1,73 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"math/rand"
+	"time"
+
+	"git.ksdemosapps.com/kylesoda/pgx-learning/internal/config"
+	"git.ksdemosapps.com/kylesoda/pgx-learning/internal/models"
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+func generateTasks(count int) []models.Task {
+	tasks := make([]models.Task, count)
+
+	for i := 1; i <= count; i++ {
+		tasks[i-1] = models.Task{
+			Text:      fmt.Sprintf("random task Nº %v", i),
+			Completed: rand.Float64() > 0.5,
+		}
+	}
+
+	return tasks
+}
+
+func saveTasks(db *pgxpool.Pool, ctx context.Context, tasks []models.Task) error {
+	start := time.Now()
+
+	rowsCopied, err := db.CopyFrom(
+		ctx,
+		pgx.Identifier{"tasks"},
+		[]string{"text", "completed"},
+		pgx.CopyFromSlice(len(tasks), func(i int) ([]any, error) {
+			return []any{
+				(tasks)[i].Text,
+				(tasks)[i].Completed,
+			}, nil
+		}),
+	)
+
+	if err != nil {
+		return fmt.Errorf("Error al realizar el CopyFrom: %w", err)
+	}
+
+	duration := time.Since(start)
+	fmt.Printf("Se insertaron exitosamente %d registros en %v\n", rowsCopied, duration)
+
+	return nil
+}
+
+func main() {
+	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
+	defer cancel()
+
+	db, err := pgxpool.New(ctx, config.Db.Url)
+	if err != nil {
+		log.Fatalf("Unable to create connection pool: %v", err)
+	}
+	defer db.Close()
+
+	count := 100000
+	fmt.Printf("Generando %d registros...\n", count)
+	tasks := generateTasks(count)
+
+	if err := saveTasks(db, ctx, tasks); err != nil {
+		log.Fatalf("Unexpected error: %v", err)
+	} else {
+		fmt.Println("Database seed completed succesfully")
+	}
+}