/
device.go
231 lines (208 loc) · 6.11 KB
/
device.go
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package models
import (
"errors"
"fmt"
"reflect"
"strings"
"github.com/astaxie/beego/orm"
"time"
"github.com/astaxie/beego"
)
type Device struct {
Id int64 `orm:"pk;auto;column(id)" json:"id"`
Device *Device `orm:"rel(fk);null" json:"device"`
Node *Node `orm:"rel(fk);null" json:"node"`
Address *int `orm:"" json:"address"`
Baud int `orm:"size(11)" json:"baud"`
Sleep int64 `orm:"size(32)" json:"sleep"`
Description string `orm:"size(254)" json:"description" valid:"MaxSize(254)"`
Name string `orm:"size(254)" json:"name" valid:"MaxSize(254);Required"`
Status string `orm:"size(254)" json:"status" valid:"MaxSize(254)"`
StopBite int64 `orm:"size(11)" json:"stop_bite"`
Timeout time.Duration `orm:"" json:"timeout"`
Tty string `orm:"size(254)" json:"tty" valid:"MaxSize(254)"`
States []*DeviceState `orm:"reverse(many)" json:"states"`
Actions []*DeviceAction `orm:"reverse(many)" json:"actions"`
Created_at time.Time `orm:"auto_now_add;type(datetime);column(created_at)" json:"created_at"`
Update_at time.Time `orm:"auto_now;type(datetime);column(update_at)" json:"update_at"`
IsGroup bool `orm:"-" json:"is_group"`
}
func (m *Device) TableName() string {
return beego.AppConfig.String("db_devices")
}
func init() {
orm.RegisterModel(new(Device))
}
// AddDevice insert a new Device into database and returns
// last inserted Id on success.
func AddDevice(m *Device) (id int64, err error) {
o := orm.NewOrm()
id, err = o.Insert(m)
return
}
// GetDeviceById retrieves Device by Id. Returns error if
// Id doesn't exist
func GetDeviceById(id int64) (v *Device, err error) {
o := orm.NewOrm()
v = &Device{Id: id}
if err = o.Read(v); err != nil {
return
}
if v.Device != nil {
_, err = o.LoadRelated(v, "Device")
}
if v.Node != nil {
_, err = o.LoadRelated(v, "Node")
}
return
}
// GetAllDevice retrieves all Device matches certain condition. Returns empty list if
// no records exist
func GetAllDevice(query map[string]string, fields []string, sortby []string, order []string,
offset int64, limit int64) (ml []interface{}, meta *map[string]int64, err error) {
o := orm.NewOrm()
qs := o.QueryTable(new(Device))
// query k=v
for k, v := range query {
// rewrite dot-notation to Object__Attribute
k = strings.Replace(k, ".", "__", -1)
qs = qs.Filter(k, v)
}
// order by:
var sortFields []string
if len(sortby) != 0 {
if len(sortby) == len(order) {
// 1) for each sort field, there is an associated order
for i, v := range sortby {
orderby := ""
if order[i] == "desc" {
orderby = "-" + v
} else if order[i] == "asc" {
orderby = v
} else {
return nil, nil, errors.New("Error: Invalid order. Must be either [asc|desc]")
}
sortFields = append(sortFields, orderby)
}
qs = qs.OrderBy(sortFields...)
} else if len(sortby) != len(order) && len(order) == 1 {
// 2) there is exactly one order, all the sorted fields will be sorted by this order
for _, v := range sortby {
orderby := ""
if order[0] == "desc" {
orderby = "-" + v
} else if order[0] == "asc" {
orderby = v
} else {
return nil, nil, errors.New("Error: Invalid order. Must be either [asc|desc]")
}
sortFields = append(sortFields, orderby)
}
} else if len(sortby) != len(order) && len(order) != 1 {
return nil, nil, errors.New("Error: 'sortby', 'order' sizes mismatch or 'order' size is not 1")
}
} else {
if len(order) != 0 {
return nil, nil, errors.New("Error: unused 'order' fields")
}
}
var l []Device
qs = qs.RelatedSel("Device", "Node").OrderBy(sortFields...)
objects_count, err := qs.Count()
if err != nil {
return
}
if _, err = qs.Limit(limit, offset).All(&l, fields...); err == nil {
if len(fields) == 0 {
for _, v := range l {
ml = append(ml, v)
}
} else {
// trim unused fields
for _, v := range l {
m := make(map[string]interface{})
val := reflect.ValueOf(v)
for _, fname := range fields {
m[fname] = val.FieldByName(fname).Interface()
}
ml = append(ml, m)
}
}
meta = &map[string]int64{
"objects_count": objects_count,
"limit": limit,
"offset": offset,
}
return ml, meta, nil
}
return nil, nil, err
}
// UpdateDevice updates Device by Id and returns error if
// the record to be updated doesn't exist
func UpdateDeviceById(m *Device) (err error) {
o := orm.NewOrm()
v := Device{Id: m.Id}
// ascertain id exists in the database
if err = o.Read(&v); err == nil {
var num int64
if num, err = o.Update(m); err == nil {
fmt.Println("Number of records updated in database:", num)
}
}
return
}
// DeleteDevice deletes Device by Id and returns error if
// the record to be deleted doesn't exist
func DeleteDevice(id int64) (err error) {
o := orm.NewOrm()
v := Device{Id: id}
// ascertain id exists in the database
if err = o.Read(&v); err == nil {
var num int64
if num, err = o.Delete(&Device{Id: id}); err == nil {
fmt.Println("Number of records deleted in database:", num)
}
}
return
}
func GetParentDeviceByChildId(id int64) (parent *Device, err error) {
o := orm.NewOrm()
err = o.Raw(fmt.Sprintf(`SELECT p2.*
FROM %s as p1
LEFT JOIn %[1]s as p2 on p2.id = p1.device_id
WHERE p1.id = %d
`, parent.TableName(), id)).QueryRow(&parent)
parent.Id = id
if parent.Device != nil {
_, err = o.LoadRelated(parent, "Device")
}
if parent.Node != nil {
_, err = o.LoadRelated(parent, "Node")
}
return
}
func (m *Device) GetChilds() (childs []*Device, all int64, err error) {
o := orm.NewOrm()
all, err = o.QueryTable(m).RelatedSel().Filter("device_id", m.Id).All(&childs)
return
}
func (m *Device) GetNode() (*Node, error) {
return GetNodeById(m.Node.Id)
}
func (m *Device) GetInheritedData() (err error) {
o := orm.NewOrm()
if m.Device != nil {
_, err = o.LoadRelated(m, "Device")
m.Actions, err = GetAllDeviceActionByDevice(m.Device.Id)
m.States, err = GetAllDeviceStateByDevice(m.Device.Id)
} else {
_, err = o.LoadRelated(m, "States")
_, err = o.LoadRelated(m, "Actions")
}
return
}
func GetDevicesCount() (total int64, err error) {
o := orm.NewOrm()
total, err = o.QueryTable(&Device{}).Count()
return
}