A few tweaks

app.go

@@ -2,8 +2,6 @@ package main
 
 import (
 	"context"
-	"fmt"
-	"os"
 
 	"git.cems.dev/cdricms/bdooc/proto"
 	"github.com/wailsapp/wails/v2/pkg/runtime"
@@ -52,13 +50,6 @@ func (a *App) GetEmployees(path string, limit, page uint, column, query *string)
 	return a.employees.Employees[page*limit : page*limit+limit], nil
 }
 
-func (a *App) SaveData(data []uint8, filename string) {
-	err := proto.SaveToFile(data, filename)
-	if err != nil {
-		panic(err)
-	}
-}
-
 func (a *App) GetProtoPath() string {
 	return a.OpenPath([]runtime.FileFilter{{
 		DisplayName: "Proto binary file",
@@ -78,8 +69,22 @@ func (a *App) OpenPath(filters []runtime.FileFilter) string {
 	return path
 }
 
-func (a *App) IsPathValid(path string) bool {
-	_, err := os.Stat(path)
-	fmt.Println(path)
-	return !os.IsNotExist(err)
+type FunctionAgg string
+
+const (
+	AVG = FunctionAgg("AVG")
+	SUM = FunctionAgg("SUM")
+)
+
+func (a *App) AggregateByColumn(groupBy proto.EmployeeField, on proto.EmployeeField, function FunctionAgg) map[string]float64 {
+	return proto.AggregateByColumn(a.employees, proto.EmployeeField(proto.SnakeCaseToPascalCase(string(groupBy))), func(ep proto.EmployeePList) float64 {
+		switch function {
+		case AVG:
+			return proto.Average(ep, proto.EmployeeField(proto.SnakeCaseToPascalCase(string(on))))
+		case SUM:
+			return proto.Sum(ep, proto.EmployeeField(proto.SnakeCaseToPascalCase(string(on))))
+		}
+
+		return 0.0
+	})
 }