node-api/apps/types.go

package apps

import (
	"regexp"
	"strings"
	"time"

	// This is line from GORM documentation that imports database dialect
	_ "github.com/jinzhu/gorm/dialects/sqlite"
)

// ValidationError is error that holds multiple validation error messages
type ValidationError struct {
	Errors []string
}

func (v ValidationError) Error() string {
	return strings.Join(v.Errors, "\n")
}

// Label holds metadata about the application
type Label struct {
	Value string `json:"value"`
	AppID uint   `json:"-" gorm:"not null"`
}

// AppState contains info about runnint application, it's not saved in the database
type AppState struct {
	State           string  `json:"state"`
	CPUUsage        float64 `json:"cpu_usage"`    // in percents
	MemoryUsage     int     `json:"memory_usage"` // in MB
	DiskUsageBytes  int     `json:"disk_usage_bytes"`
	DiskUsageInodes int     `json:"disk_usage_inodes"`
}

// App keeps info about hosted application
type App struct {
	ID        uint       `gorm:"primary_key" json:"id"`
	CreatedAt time.Time  `json:"created_at"`
	UpdatedAt time.Time  `json:"updated_at"`
	DeletedAt *time.Time `sql:"index" json:"deleted_at"`

	Name     string  `json:"name" gorm:"unique,index,not_null"`
	SSHPort  int     `json:"ssh_port"`
	HTTPPort int     `json:"http_port"`
	Image    string  `json:"image"`
	CPU      int     `json:"cpu"`                            // percentage, 200 means two CPU
	Memory   int     `json:"memory"`                         // Limit in MB
	Labels   []Label `json:"labels" gorm:"foreignkey:AppID"` // username:cx or user_id:1

	State           string  `json:"state"`
	CPUUsage        float64 `json:"cpu_usage"`    // in percents
	MemoryUsage     int     `json:"memory_usage"` // in MB
	DiskUsageBytes  int     `json:"disk_usage_bytes"`
	DiskUsageInodes int     `json:"disk_usage_inodes"`
}

// Validate do basic checks of the struct values
func (a *App) Validate() []string {
	var errors []string

	nameRegExp := regexp.MustCompile(`^[a-z0-9_]{3,48}$`)
	if !nameRegExp.MatchString(a.Name) {
		errors = append(errors, "name can contain only characters, numbers and underscores and has to be between 3 and 48 characters")
	}

	if a.SSHPort < 0 && a.SSHPort > 65536 {
		errors = append(errors, "SSH port has to be between 0 and 65536, where 0 means disabled")
	}

	if a.HTTPPort < 1 && a.HTTPPort > 65536 {
		errors = append(errors, "HTTP port has to be between 1 and 65536")
	}

	if a.Image == "" {
		errors = append(errors, "image cannot be empty")
	}

	if a.CPU < 10 && a.CPU > 800 {
		errors = append(errors, "CPU value has be between 10 and 800")
	}

	if a.Memory < 32 && a.Memory > 16384 {
		errors = append(errors, "Memory value has be between 32 and 16384")
	}

	return errors
}