Implement settingsservice

.gitignore

@@ -3,3 +3,6 @@ node_modules
 frontend/dist
 tmp
 food.db
+food.db-shm
+food.db-wal
+main.log

db.go

@@ -9,6 +9,7 @@ import (
 )
 
 type DB struct {
+	Ready     bool
 	path      string
 	readConn  *sql.DB
 	writeConn *sql.DB
@@ -39,6 +40,7 @@ func (db *DB) Open() error {
 	readConn.SetConnMaxLifetime(30 * time.Second)
 	db.readConn = readConn
 
+	db.Ready = true
 	return nil
 }
 
@@ -54,4 +56,4 @@ func (db *DB) Close() error {
 	}
 
 	return nil
-}
+}

foodservice.go

@@ -0,0 +1,5 @@
+package main
+
+type FoodService struct {
+	db *DB
+}

main.go

@@ -47,6 +47,14 @@ func main() {
 		os.Exit(1)
 	}
 
+	settingsService := SettingsService{db: &db}
+	settings, err := settingsService.LoadSettings()
+	if err != nil {
+		Error.Printf("%++v", err)
+		os.Exit(1)
+	}
+	log.Println(settings)
+
 	log.Println("done")
 	wg.Wait()
 

main.log

@@ -1 +0,0 @@
-15:05:28.134465 main.go:50: done

settingsservice.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"fmt"
+	"log"
+)
+
+type (
+	SettingsService struct {
+		db *DB
+	}
+)
+
+var Settings map[string]string = map[string]string{
+	"FoodDaysLookback":             "7",
+	"FoodAggregatedDaysLookback":   "7",
+	"WeightDaysLookback":           "7",
+	"WeightAggregatedDaysLookback": "7",
+}
+
+func (s *SettingsService) LoadSettings() (map[string]string, error) {
+	if s.db == nil || !s.db.Ready {
+		return Settings, fmt.Errorf("cannot load Settings, db is nil or is not ready")
+	}
+
+	for key := range Settings {
+		var value string
+		err := s.db.readConn.QueryRow("SELECT value FROM settings WHERE key = ?", key).Scan(&value)
+		if err != nil {
+			Error.Printf("error getting setting for key %s: %++v", key, err)
+			continue
+		}
+		log.Println(key, value)
+	}
+
+	return Settings, nil
+}

types.go

@@ -3,11 +3,6 @@ package main
 import "time"
 
 type (
-	Setting struct {
-		key   string
-		value string
-	}
-
 	Food struct {
 		rowid      int
 		date       time.Time

weightservice.go

@@ -0,0 +1,5 @@
+package main
+
+type WeightService struct {
+	db *DB
+}