5GPowerQuality/api
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Nise Void 2018-05-14 14:19:29 +02:00
commit 6bc66975db
Signed by: NiseVoid
GPG key ID: FBA14AC83EA602F3
10 changed files with 407 additions and 0 deletions
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21
app/db.go Normal file
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package app
import (
"database/sql"
"git.ultraware.nl/NiseVoid/qb/driver/autoqb"
"git.ultraware.nl/NiseVoid/qb/qbdb"
_ "github.com/lib/pq" // PostgreSQL driver
)
var db *qbdb.DB
// InitDB initializes the database connection
func InitDB() {
d, err := sql.Open(`postgres`, `host=/tmp dbname=power_quality`)
if err != nil {
panic(err)
}
db = autoqb.New(d)
}

175
app/internal/model/db.json Normal file
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[
{
"name": "public.measurement",
"fields": [
{
"name": "c_gem_1",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "c_gem_2",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "c_gem_3",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "ep_1",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "ep_2",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "ep_3",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "i_gem_1",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "i_gem_2",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "i_gem_3",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "i_max_1",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "i_max_2",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "i_max_3",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "p_gem_1",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "p_gem_2",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "p_gem_3",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "p_max_1",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "p_max_2",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "p_max_3",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "s_gem_1",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "s_gem_2",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "s_gem_3",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "s_max_1",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "s_max_2",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "s_max_3",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "time",
"type": "timestamp with time zone",
"null": false,
"size": 8
},
{
"name": "u_gem_1",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "u_gem_2",
"type": "double precision",
"null": false,
"size": 8
},
{
"name": "u_gem_3",
"type": "double precision",
"null": false,
"size": 8
}
]
}
]

3
app/internal/model/model.go Normal file
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package model
//go:generate qb-generator db.json tables.go

71
app/stats.go Normal file
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package app
import (
"reflect"
"time"
"git.fuyu.moe/5GPowerQuality/api/app/internal/model"
"git.ultraware.nl/NiseVoid/qb"
"git.ultraware.nl/NiseVoid/qb/qc"
"git.ultraware.nl/NiseVoid/qb/qf"
)
// Count returns the number of measurements
func Count() int {
m := model.Measurement()
q := m.Select(qf.CountAll())
var count *int
err := db.QueryRow(q).Scan(&count)
if err != nil {
panic(err)
}
if count == nil {
return 0
}
return *count
}
// GetAttribute returns the specified attribute for all phases since the specified date
func GetAttribute(attr string, date time.Time) (data []Phases) {
m := model.Measurement()
f := reflect.ValueOf(m).Elem().FieldByName(attr + `1`)
if !f.IsValid() || f.Type().Name() != `Field` {
return nil
}
f1 := f.Interface().(*qb.TableField)
f2 := reflect.ValueOf(m).Elem().FieldByName(attr + `2`).Interface().(*qb.TableField)
f3 := reflect.ValueOf(m).Elem().FieldByName(attr + `3`).Interface().(*qb.TableField)
q := m.Select(m.Time, f1, f2, f3).
OrderBy(qb.Desc(m.Time)).
Where(qc.Gte(m.Time, date))
rows, err := db.Query(q)
if err != nil {
panic(err)
}
for rows.Next() {
var phases Phases
err := rows.Scan(&phases.Time, &phases.P1, &phases.P2, &phases.P3)
if err != nil {
panic(err)
}
data = append(data, phases)
}
return
}
// Phases contains data for all phases
type Phases struct {
Time time.Time `json:"time"`
P1 float64 `json:"phase_1"`
P2 float64 `json:"phase_2"`
P3 float64 `json:"phase_3"`
}