Database

.gitignore

@@ -0,0 +1,2 @@
+#ignore
+.env

backend/cmd/main.go

@@ -3,18 +3,21 @@ package main
 import (
 	"fmt"
 	"log"
+	"task/backend/database"
 
-	"github.com/gofiber/fiber/v2/middleware/cors"
 	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v2/middleware/cors"
 )
 
 func main() {
+	database.ConnectDB()
+	database.RunMigrations()
 	app := fiber.New()
 
 	// Add CORS middleware
 	app.Use(cors.New(cors.Config{
-		AllowMethods:     "GET,POST,PUT,DELETE,OPTIONS",
-		AllowHeaders:     "Origin,Content-Type,Accept,Authorization",
+		AllowMethods: "GET,POST,PUT,DELETE,OPTIONS",
+		AllowHeaders: "Origin,Content-Type,Accept,Authorization",
 		// AllowCredentials: true,
 	}))
 

backend/database/db.go

@@ -0,0 +1,79 @@
+// database/db.go
+package database
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/joho/godotenv"
+	"github.com/lib/pq" // PostgreSQL driver for checking specific errors
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+)
+
+var DB *gorm.DB
+
+func ConnectDB() {
+	err := godotenv.Load()
+	if err != nil {
+		log.Fatal("Error loading .env file")
+	}
+	// --- Step 1: Connect to the default 'postgres' database to check if our DB exists ---
+	const (
+		host   = "localhost"
+		port   = 5432
+		dbname = "task_manager"
+	)
+	user := os.Getenv("DB_USER")
+	password := os.Getenv("DB_PASSWORD")
+
+	// DSN for the initial connection to the 'postgres' database
+	initialDSN := fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=postgres sslmode=disable", host, port, user, password)
+
+	// Open a standard SQL connection
+	sqlDB, err := sql.Open("postgres", initialDSN)
+	if err != nil {
+		log.Fatal("failed to connect to postgres database:", err)
+	}
+	defer sqlDB.Close()
+
+	// Ping the database to ensure the connection is alive
+	err = sqlDB.Ping()
+	if err != nil {
+		log.Fatal("failed to ping postgres database:", err)
+	}
+
+	// --- Step 2: Try to create the 'task_manager' database ---
+	_, err = sqlDB.Exec(fmt.Sprintf("CREATE DATABASE %s", dbname))
+	if err != nil {
+		// If the error is that the database already exists, we can ignore it.
+		// The pq library is needed to inspect the specific PostgreSQL error code.
+		if pgErr, ok := err.(*pq.Error); ok && pgErr.Code == "42P04" { // 42P04 is for "duplicate_database"
+			fmt.Printf("Database '%s' already exists. Continuing.\n", dbname)
+		} else {
+			// A different error occurred
+			log.Fatal("failed to create database:", err)
+		}
+	} else {
+		fmt.Printf("Database '%s' created successfully.\n", dbname)
+	}
+
+	// --- Step 3: Now, connect to the 'task_manager' database with GORM ---
+	dsn := fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=disable", host, port, user, password, dbname)
+
+	DB, err = gorm.Open(postgres.Open(dsn), &gorm.Config{})
+	if err != nil {
+		log.Fatal("failed to connect to task_manager database:", err)
+	}
+
+	// The AutoMigrate function should be called in your main function or a setup function,
+	// after you've defined your models. For example:
+	// err = DB.AutoMigrate(&models.User{}, &models.Task{})
+	// if err != nil {
+	// 	log.Fatal("failed to migrate database:", err)
+	// }
+
+	fmt.Println("Connected to the database successfully.")
+}

backend/database/migrate.go

@@ -0,0 +1,20 @@
+package database
+
+import (
+	"log"
+	"task/backend/models"
+)
+
+func RunMigrations() {
+	log.Println("Running database migrations...")
+
+	err := DB.AutoMigrate(
+		&models.Task{},
+	)
+
+	if err != nil {
+		log.Fatalf("Failed to run migrations: %v", err)
+	}
+
+	log.Println("✅ Database migrations completed successfully")
+}

backend/models/task.go

@@ -0,0 +1,50 @@
+package models
+
+import (
+	"database/sql/driver"
+	"time"
+)
+
+type TaskStatus string
+
+const (
+	TaskStatusPending    TaskStatus = "pending"
+	TaskStatusInProgress TaskStatus = "in_progress"
+	TaskStatusCompleted  TaskStatus = "completed"
+)
+
+
+type Task struct {
+	ID          int          `json:"id" db:"id"`
+	Title       string       `json:"title" db:"title"`
+	Description string       `json:"description" db:"description"`
+	Status      TaskStatus   `json:"status" db:"status"`	
+	CreatedAt   time.Time    `json:"created_at" db:"created_at"`
+	UpdatedAt   time.Time    `json:"updated_at" db:"updated_at"`
+}
+
+type CreateTaskRequest struct {
+	Title       string       `json:"title" validate:"required,min=1,max=200"`
+	Description string       `json:"description"`
+	Status      TaskStatus   `json:"status"`
+	DueDate     *time.Time   `json:"due_date"`
+}
+
+type UpdateTaskRequest struct {
+	Title       *string       `json:"title,omitempty"`
+	Description *string       `json:"description,omitempty"`
+	Status      *TaskStatus   `json:"status,omitempty"`
+	DueDate     *time.Time    `json:"due_date,omitempty"`
+}
+
+type TasksResponse struct {
+	Tasks []Task `json:"tasks"`
+	Total int    `json:"total"`
+	Page  int    `json:"page"`
+	Size  int    `json:"size"`
+}
+
+// Implement driver.Valuer interface for TaskStatus
+func (ts TaskStatus) Value() (driver.Value, error) {
+	return string(ts), nil
+}

go.mod

@@ -2,13 +2,23 @@ module task
 
 go 1.23.0
 
-toolchain go1.24.7
-
-require github.com/gofiber/fiber/v2 v2.52.9
+require (
+	github.com/gofiber/fiber/v2 v2.52.9
+	github.com/joho/godotenv v1.5.1
+	github.com/lib/pq v1.10.9
+	gorm.io/driver/postgres v1.6.0
+	gorm.io/gorm v1.30.3
+)
 
 require (
 	github.com/andybalholm/brotli v1.1.0 // indirect
 	github.com/google/uuid v1.6.0 // indirect
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
+	github.com/jackc/pgx/v5 v5.6.0 // indirect
+	github.com/jackc/puddle/v2 v2.2.2 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
 	github.com/klauspost/compress v1.17.9 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
@@ -17,5 +27,8 @@ require (
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/fasthttp v1.51.0 // indirect
 	github.com/valyala/tcplisten v1.0.0 // indirect
+	golang.org/x/crypto v0.31.0 // indirect
+	golang.org/x/sync v0.10.0 // indirect
 	golang.org/x/sys v0.33.0 // indirect
+	golang.org/x/text v0.21.0 // indirect
 )

go.sum

@@ -1,27 +1,67 @@
 github.com/andybalholm/brotli v1.1.0 h1:eLKJA0d02Lf0mVpIDgYnqXcUn0GqVmEFny3VuID1U3M=
 github.com/andybalholm/brotli v1.1.0/go.mod h1:sms7XGricyQI9K10gOSf56VKKWS4oLer58Q+mhRPtnY=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/gofiber/fiber/v2 v2.52.9 h1:YjKl5DOiyP3j0mO61u3NTmK7or8GzzWzCFzkboyP5cw=
 github.com/gofiber/fiber/v2 v2.52.9/go.mod h1:YEcBbO/FB+5M1IZNBP9FO3J9281zgPAreiI1oqg8nDw=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+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 v5.6.0 h1:SWJzexBzPL5jb0GEsrPMLIsi/3jOo7RHlzTjcAeDrPY=
+github.com/jackc/pgx/v5 v5.6.0/go.mod h1:DNZ/vlrUnhWCoFGxHAG8U2ljioxukquj7utPDgtQdTw=
+github.com/jackc/puddle/v2 v2.2.2 h1:PR8nw+E/1w0GLuRFSmiioY6UooMp6KJv0/61nB7icHo=
+github.com/jackc/puddle/v2 v2.2.2/go.mod h1:vriiEXHvEE654aYKXXjOvZM39qJ0q+azkZFrfEOc3H4=
+github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD/E=
+github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
+github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
+github.com/jinzhu/now v1.1.5/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
 github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
 github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
+github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=
+github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
 github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
 github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mattn/go-runewidth v0.0.16 h1:E5ScNMtiwvlvB5paMFdw9p4kSQzbXFikJ5SQO6TULQc=
 github.com/mattn/go-runewidth v0.0.16/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
+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=
+github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
+github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
 github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
 github.com/valyala/fasthttp v1.51.0 h1:8b30A5JlZ6C7AS81RsWjYMQmrZG6feChmgAolCl1SqA=
 github.com/valyala/fasthttp v1.51.0/go.mod h1:oI2XroL+lI7vdXyYoQk03bXBThfFl2cVdIA3Xl7cH8g=
 github.com/valyala/tcplisten v1.0.0 h1:rBHj/Xf+E1tRGZyWIWwJDiRY0zc1Js+CV5DqwacVSA8=
 github.com/valyala/tcplisten v1.0.0/go.mod h1:T0xQ8SeCZGxckz9qRXTfG43PvQ/mcWh7FwZEA7Ioqkc=
+golang.org/x/crypto v0.31.0 h1:ihbySMvVjLAeSH1IbfcRTkD/iNscyz8rGzjF/E5hV6U=
+golang.org/x/crypto v0.31.0/go.mod h1:kDsLvtWBEx7MV9tJOj9bnXsPbxwJQ6csT/x4KIN4Ssk=
+golang.org/x/sync v0.10.0 h1:3NQrjDixjgGwUOCaF8w2+VYHv0Ve/vGYSbdkTa98gmQ=
+golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.33.0 h1:q3i8TbbEz+JRD9ywIRlyRAQbM0qF7hu24q3teo2hbuw=
 golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
+golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
+golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
+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=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gorm.io/driver/postgres v1.6.0 h1:2dxzU8xJ+ivvqTRph34QX+WrRaJlmfyPqXmoGVjMBa4=
+gorm.io/driver/postgres v1.6.0/go.mod h1:vUw0mrGgrTK+uPHEhAdV4sfFELrByKVGnaVRkXDhtWo=
+gorm.io/gorm v1.30.3 h1:QiG8upl0Sg9ba2Zatfjy0fy4It2iNBL2/eMdvEkdXNs=
+gorm.io/gorm v1.30.3/go.mod h1:8Z33v652h4//uMA76KjeDH8mJXPm1QNCYrMeatR0DOE=