getStatistics handler, db-interface and ts API

backend/internal/database/db.go

@@ -2,11 +2,13 @@ package database
 
 import (
 	"embed"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"path/filepath"
 	"ttime/internal/types"
 
+	"github.com/gofiber/fiber/v2/log"
 	"github.com/jmoiron/sqlx"
 	_ "modernc.org/sqlite"
 )
@@ -41,6 +43,7 @@ type Database interface {
 	SignWeeklyReport(reportId int, projectManagerId int) error
 	IsSiteAdmin(username string) (bool, error)
 	IsProjectManager(username string, projectname string) (bool, error)
+	ReportStatistics(username string, projectName string) (*types.Statistics, error)
 	GetProjectTimes(projectName string) (map[string]int, error)
 	UpdateWeeklyReport(projectName string, userName string, week int, developmentTime int, meetingTime int, adminTime int, ownWorkTime int, studyTime int, testingTime int) error
 	RemoveProject(projectname string) error
@@ -94,6 +97,17 @@ const removeUserFromProjectQuery = `DELETE FROM user_roles
 									WHERE user_id = (SELECT id FROM users WHERE username = ?) 
 									AND project_id = (SELECT id FROM projects WHERE name = ?)`
 
+const reportStatistics = `SELECT SUM(development_time) AS total_development_time,
+							SUM(meeting_time) AS total_meeting_time,
+							SUM(admin_time) AS total_admin_time,
+							SUM(own_work_time) AS total_own_work_time,
+							SUM(study_time) AS total_study_time,
+							SUM(testing_time) AS total_testing_time
+							FROM weekly_reports
+							WHERE user_id = (SELECT id FROM users WHERE username = ?)
+							AND project_id = (SELECT id FROM projects WHERE name = ?)
+							GROUP BY user_id, project_id`
+
 // DbConnect connects to the database
 func DbConnect(dbpath string) Database {
 	// Open the database
@@ -111,6 +125,24 @@ func DbConnect(dbpath string) Database {
 	return &Db{db}
 }
 
+func (d *Db) ReportStatistics(username string, projectName string) (*types.Statistics, error) {
+	var result types.Statistics
+
+	err := d.Get(&result, reportStatistics, username, projectName)
+	if err != nil {
+		return nil, err
+	}
+
+	serialized, err := json.Marshal(result)
+	if err != nil {
+		return nil, err
+	}
+
+	log.Info(string(serialized))
+
+	return &result, nil
+}
+
 func (d *Db) CheckUser(username string, password string) bool {
 	var dbPassword string
 	err := d.Get(&dbPassword, "SELECT password FROM users WHERE username = ?", username)