Introduce aggregation model.

main.go

@@ -64,6 +64,8 @@ func main() {
 	// Migrate database schema
 	db.AutoMigrate(&models.User{})
 	db.AutoMigrate(&models.Heartbeat{}).AddForeignKey("user_id", "users(id)", "RESTRICT", "RESTRICT")
+	db.AutoMigrate(&models.Aggregation{}).AddForeignKey("user_id", "users(id)", "RESTRICT", "RESTRICT")
+	db.AutoMigrate(&models.AggregationItem{}).AddForeignKey("aggregation_id", "aggregations(id)", "RESTRICT", "RESTRICT")
 
 	// Services
 	heartbeatSrvc := &services.HeartbeatService{db}

models/aggregation.go

@@ -1,24 +1,31 @@
 package models
 
-import "time"
+import (
+	"time"
 
-type AggregationType string
+	"github.com/jinzhu/gorm"
+)
 
 const (
-	AggregationProject  AggregationType = "project"
-	AggregationLanguage AggregationType = "language"
-	AggregationEditor   AggregationType = "editor"
-	AggregationOS       AggregationType = "os"
+	AggregationProject  int = 0
+	AggregationLanguage int = 1
+	AggregationEditor   int = 2
+	AggregationOS       int = 3
 )
 
 type Aggregation struct {
-	From  time.Time
-	To    time.Time
-	Type  AggregationType
+	gorm.Model
+	User     *User         `gorm:"not null; association_foreignkey:ID"`
+	UserID   string        `gorm:"not null; index:idx_user,idx_type_time_user"`
+	From     time.Time     `gorm:"not null; index:idx_from,idx_type_time_user; default:now()"`
+	To       time.Time     `gorm:"not null; index:idx_to,idx_type_time_user; default:now()"`
+	Duration time.Duration `gorm:"-"`
+	Type     uint8         `gorm:"not null; index:idx_type,idx_type_time_user"`
 	Items    []AggregationItem
 }
 
 type AggregationItem struct {
-	Key   string
+	AggregationID uint   `gorm:"not null; association_foreignkey:ID"`
+	Key           string `gorm:"not null"`
 	Total         time.Duration
 }

models/heartbeat.go

@@ -15,18 +15,18 @@ type HeartbeatReqTime time.Time
 
 type Heartbeat struct {
 	gorm.Model
-	User            *User             `json:"user" gorm:"not_null; association_foreignkey:ID"`
-	UserID          string            `json:"-" gorm:"not_null"`
-	Entity          string            `json:"entity" gorm:"not_null"`
+	User            *User             `json:"user" gorm:"not null; association_foreignkey:ID"`
+	UserID          string            `json:"-" gorm:"not null; index:idx_time_user"`
+	Entity          string            `json:"entity" gorm:"not null"`
 	Type            string            `json:"type"`
 	Category        string            `json:"category"`
-	Project         string            `json:"project; index:idx_project"`
+	Project         string            `json:"project" gorm:"index:idx_project"`
 	Branch          string            `json:"branch"`
-	Language        string            `json:"language" gorm:"not_null; index:idx_language"`
+	Language        string            `json:"language" gorm:"not null"`
 	IsWrite         bool              `json:"is_write"`
-	Editor          string            `json:"editor" gorm:"not_null; index:idx_editor"`
-	OperatingSystem string            `json:"operating_system" gorm:"not_null; index:idx_os"`
-	Time            *HeartbeatReqTime `json:"time" gorm:"type:timestamp; default:now(); index:idx_time"`
+	Editor          string            `json:"editor" gorm:"not null"`
+	OperatingSystem string            `json:"operating_system" gorm:"not null"`
+	Time            *HeartbeatReqTime `json:"time" gorm:"type:timestamp; default:now(); index:idx_time,idx_time_user"`
 }
 
 func (h *Heartbeat) Valid() bool {

services/aggregation.go

@@ -24,6 +24,6 @@ func (srv *AggregationService) Aggregate(from time.Time, to time.Time, user *mod
 	}
 }
 
-func (srv *AggregationService) aggregateBy(*[]models.Heartbeat, models.AggregationType) *models.Aggregation {
+func (srv *AggregationService) aggregateBy(heartbeats *[]models.Heartbeat, aggregationType int) *models.Aggregation {
 	return &models.Aggregation{}
 }