feat(auth): Add /token endpoint to request a access token

app/models/token.go

@@ -0,0 +1,43 @@
+package models
+
+import (
+	"time"
+
+	"git.secnex.io/secnex/oauth2-api/utils"
+	"github.com/google/uuid"
+	"gorm.io/gorm"
+)
+
+type Token struct {
+	ID                    uuid.UUID      `gorm:"type:uuid;primary_key;default:gen_random_uuid()" json:"id"`
+	UserID                uuid.UUID      `gorm:"type:uuid;not null" json:"user_id"`
+	RefreshToken          string         `gorm:"not null" json:"refresh_token"`
+	SessionExpiresAt      *time.Time     `gorm:"not null" json:"session_expires_at"`
+	RefreshTokenExpiresAt *time.Time     `gorm:"not null" json:"refresh_token_expires_at"`
+	CreatedAt             time.Time      `gorm:"autoCreateTime" json:"created_at"`
+	UpdatedAt             time.Time      `gorm:"autoUpdateTime" json:"updated_at"`
+	DeletedAt             gorm.DeletedAt `gorm:"index" json:"deleted_at"`
+
+	User *User `gorm:"foreignKey:UserID" json:"user"`
+}
+
+func (Token) TableName() string {
+	return "tokens"
+}
+
+func (token *Token) BeforeCreate(tx *gorm.DB) (err error) {
+	refreshTokenHash, err := utils.Hash(token.RefreshToken)
+	if err != nil {
+		return err
+	}
+	token.RefreshToken = refreshTokenHash
+	if token.SessionExpiresAt == nil {
+		sessionExpiresAt := time.Now().Add(time.Hour * 24)
+		token.SessionExpiresAt = &sessionExpiresAt
+	}
+	if token.RefreshTokenExpiresAt == nil {
+		refreshTokenExpiresAt := time.Now().Add(time.Hour * 24 * 30)
+		token.RefreshTokenExpiresAt = &refreshTokenExpiresAt
+	}
+	return nil
+}