Add support for seperate meters

app/internal/model/db.json

@@ -4,136 +4,140 @@
 		"fields": [
 			{
 				"name": "c_gem_1",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "c_gem_2",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "c_gem_3",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "ep_1",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "ep_2",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "ep_3",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "i_gem_1",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "i_gem_2",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "i_gem_3",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "i_max_1",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "i_max_2",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "i_max_3",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
+			{
+				"name": "meter_id",
+				"data_type": "integer",
+				"size": 4
+			},
 			{
 				"name": "p_max_1",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "p_max_2",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "p_max_3",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "s_max_1",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "s_max_2",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "s_max_3",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "time",
-				"type": "timestamp with time zone",
-				"null": false,
+				"data_type": "timestamp with time zone",
 				"size": 8
 			},
 			{
 				"name": "u_gem_1",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "u_gem_2",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			},
 			{
 				"name": "u_gem_3",
-				"type": "double precision",
-				"null": false,
+				"data_type": "double precision",
 				"size": 8
 			}
 		]
+	},
+	{
+		"name": "public.meter",
+		"alias": "me",
+		"fields": [
+			{
+				"name": "fortop_uid",
+				"data_type": "character varying",
+				"size": 50
+			},
+			{
+				"name": "id",
+				"data_type": "integer",
+				"size": 4
+			},
+			{
+				"name": "name",
+				"data_type": "character varying",
+				"size": 255
+			}
+		]
 	}
 ]

app/stats.go

@@ -49,8 +49,39 @@ func GetAttributes() (list []Attribute) {
 	return
 }
 
+// Meter represents a single meter
+type Meter struct {
+	ID        int    `json:"id"`
+	Name      string `json:"name"`
+	FortopUID string `json:"fortop_uid"`
+}
+
+// GetMeters returns a list of all known meters
+func GetMeters() (list []Meter) {
+	me := model.Meter()
+
+	q := me.Select(me.ID, me.Name, me.FortopUID)
+
+	rows, err := db.Query(q)
+	if err != nil {
+		panic(err)
+	}
+
+	for rows.Next() {
+		var meter Meter
+		err = rows.Scan(&meter.ID, &meter.Name, &meter.FortopUID)
+		if err != nil {
+			panic(err)
+		}
+
+		list = append(list, meter)
+	}
+
+	return
+}
+
 // GetAttribute returns the specified attribute for all phases since the specified date
-func GetAttribute(index int, date time.Time) (data []Phases) {
+func GetAttribute(index, meter int, date time.Time) (data []Phases) {
 	m := model.Measurement()
 	r := reflect.ValueOf(m).Elem()
 
@@ -61,7 +92,10 @@ func GetAttribute(index int, date time.Time) (data []Phases) {
 
 	q := m.Select(m.Time, f1, f2, f3).
 		OrderBy(qb.Desc(m.Time)).
-		Where(qc.Gte(m.Time, date))
+		Where(
+			qc.Gte(m.Time, date),
+			qc.Eq(m.MeterID, meter),
+		)
 
 	rows, err := db.Query(q)
 	if err != nil {

server/main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"strconv"
 	"strings"
 	"time"
 
@@ -31,9 +32,10 @@ func main() {
 	pq := e.Group(`/pq`)
 	pq.GET(`/count`, count)
 	pq.GET(`/list`, listAttr)
+	pq.GET(`/meters`, listMeters)
 
 	for _, v := range app.GetAttributes() {
-		pq.GET(`/`+strings.ToLower(v.Name)+`/:date`, getAttr(v.Index))
+		pq.GET(`/:meter/`+strings.ToLower(v.Name)+`/:date`, getAttr(v.Index))
 
 		attrs = append(attrs, strings.ToLower(v.Name))
 	}
@@ -51,13 +53,22 @@ func listAttr(c echo.Context) error {
 	return c.JSON(200, attrs)
 }
 
+func listMeters(c echo.Context) error {
+	return c.JSON(200, app.GetMeters())
+}
+
 func getAttr(index int) echo.HandlerFunc {
 	return func(c echo.Context) error {
+		meter, err := strconv.Atoi(c.Param(`meter`))
+		if err != nil {
+			return c.NoContent(400)
+		}
+
 		date, err := time.Parse(time.RFC3339, c.Param(`date`))
 		if err != nil {
 			return c.NoContent(400)
 		}
 
-		return c.JSON(200, app.GetAttribute(index, date))
+		return c.JSON(200, app.GetAttribute(index, meter, date))
 	}
 }