Datenbanken, erster Versuch
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21 changed files with 678 additions and 320 deletions
77
controllers/handlers.go
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77
controllers/handlers.go
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package controllers
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import (
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"fmt"
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"html/template"
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"net/http"
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"sprechstundentool/models"
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"strconv"
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)
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// BaseHandler will hold everything that controller needs
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type BaseHandler struct {
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roomRepo models.RoomRepository
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officeHourRepo models.OfficeHourRepository
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courseRepo models.CourseRepository
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tutorRepo models.TutorRepository
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}
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// NewBaseHandler returns a new BaseHandler
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func NewBaseHandler(roomRepo models.RoomRepository, officeHourRepo models.OfficeHourRepository, courseRepo models.CourseRepository, tutorRepo models.TutorRepository) *BaseHandler {
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return &BaseHandler{roomRepo, officeHourRepo, courseRepo, tutorRepo}
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}
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func (b *BaseHandler) RootHandler(w http.ResponseWriter, req *http.Request) {
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b.writeTimetablePage(w, req, template.HTML(""))
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}
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func (b *BaseHandler) GetByRoomHandler(w http.ResponseWriter, req *http.Request) {
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roomId, _ := strconv.Atoi(req.FormValue("raum"))
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room, err := b.roomRepo.FindById(roomId)
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if err != nil {
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fmt.Println(err)
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b.RootHandler(w, req)
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return
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}
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officeHours, _ := b.officeHourRepo.FindByRoom(room)
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b.writeTimetablePage(w, req, printTimetable(GetTimetable(officeHours)))
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}
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func (b *BaseHandler) GetByCourseHandler(w http.ResponseWriter, req *http.Request) {
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courseid, err := strconv.Atoi(req.FormValue("veranstaltung"))
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if err != nil {
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b.RootHandler(w, req)
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}
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course, err := b.courseRepo.FindById(courseid)
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if err != nil {
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b.RootHandler(w, req)
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return
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}
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officeHours, _ := b.officeHourRepo.FindByCourse(course)
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b.writeTimetablePage(w, req, printTimetable(GetTimetable(officeHours)))
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}
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func (b *BaseHandler) writeTimetablePage(w http.ResponseWriter, req *http.Request, timetable template.HTML) {
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courses, _ := b.courseRepo.GetAll()
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rooms, _ := b.roomRepo.GetAll()
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selectedRoom, _ := strconv.Atoi(req.FormValue("raum"))
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selectedCourse, _ := strconv.Atoi(req.FormValue("veranstaltung"))
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data := struct {
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Courses []models.Course
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Rooms []models.Room
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Timetable template.HTML
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SelectedRoom int
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SelectedCourse int
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}{courses, rooms, timetable, selectedRoom, selectedCourse}
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tmpl, err := template.ParseFiles("templates/index.html")
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if err != nil {
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w.WriteHeader(http.StatusInternalServerError)
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w.Write([]byte(fmt.Sprintf("Template konnte nicht geparst werden : %s", string(err.Error()))))
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return
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}
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err = tmpl.Execute(w, data)
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if err != nil {
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w.Write([]byte(fmt.Sprintf("Template konnte nicht geparst werden : %s", string(err.Error()))))
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return
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}
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}
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137
controllers/timetable.go
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137
controllers/timetable.go
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// timetable.go
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package controllers
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import (
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"bytes"
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"fmt"
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"html/template"
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"sprechstundentool/models"
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)
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func GetTimetable(officeHours []models.OfficeHour) (timetable map[models.Date]map[int]models.OfficeHour, slots []int) {
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var fullTimetable = make(map[models.Date]map[int]models.OfficeHour)
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for _, officeHour := range officeHours {
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var slot int = 0
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for minute := 0; minute < officeHour.Duration; minute += models.MinuteGranularity { // find slot id
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_, exists := fullTimetable[models.Date{officeHour.Day, officeHour.Hour + (officeHour.Minute+minute)/60, (officeHour.Minute + minute) % 60}]
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if exists {
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_, exists := fullTimetable[models.Date{officeHour.Day, officeHour.Hour + (officeHour.Minute+minute)/60, (officeHour.Minute + minute) % 60}][slot]
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if exists {
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slot += 1
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minute = 0
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continue
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}
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} else {
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fullTimetable[models.Date{officeHour.Day, officeHour.Hour + (officeHour.Minute+minute)/60, (officeHour.Minute + minute) % 60}] = make(map[int]models.OfficeHour)
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}
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}
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for minute := 0; minute < officeHour.Duration; minute += models.MinuteGranularity { // write officeHour id to timetable
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fullTimetable[models.Date{officeHour.Day, officeHour.Hour + (officeHour.Minute+minute)/60, (officeHour.Minute + minute) % 60}][slot] = officeHour
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}
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}
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slots = []int{1, 1, 1, 1, 1}
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for date, _ := range fullTimetable {
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if slots[date.Day] < len(fullTimetable[date]) {
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slots[date.Day] = len(fullTimetable[date])
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}
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}
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timetable = make(map[models.Date]map[int]models.OfficeHour)
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for _, officeHour := range officeHours {
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for slot := 0; slot < slots[officeHour.Date.Day]; slot += 1 {
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if fullTimetable[officeHour.Date][slot] == officeHour {
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timetable[officeHour.Date] = make(map[int]models.OfficeHour)
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timetable[officeHour.Date][slot] = officeHour
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}
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}
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}
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return fullTimetable, slots
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}
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func printTimetable(timetable map[models.Date]map[int]models.OfficeHour, slots []int) template.HTML {
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var tableBody string
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tableCell, _ := template.ParseFiles("templates/td.html")
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for hour := 8; hour < 19; hour += 1 {
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for minute := 0; minute < 60; minute += models.MinuteGranularity {
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tableBody += "<tr>"
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if minute == 0 {
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tableBody += fmt.Sprintf("<td>%d Uhr</td>\n", hour)
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} else {
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tableBody += "<td></td>\n"
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}
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for day := 0; day < 5; day += 1 {
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for slot := 0; slot < slots[day]; slot += 1 {
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current, currentExists := timetable[models.Date{day, hour, minute}][slot]
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if currentExists { // This slot is taken by some office hour
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var continued bool = false // is this slot occupied by the same office hour the previous minute?
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var predecessorExists bool
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var predecessor models.OfficeHour
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if hour > 0 && minute < models.MinuteGranularity {
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predecessor, predecessorExists = timetable[models.Date{day, hour - 1, 60 - models.MinuteGranularity}][slot]
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} else {
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predecessor, predecessorExists = timetable[models.Date{day, hour, minute - models.MinuteGranularity}][slot]
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}
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if predecessorExists {
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continued = (predecessor == current)
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} else {
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continued = false
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}
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if continued {
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continue
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} else {
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var celldata bytes.Buffer
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data := struct {
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Rowspan int
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StartHour int
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StartMinute int
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EndHour int
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EndMinute int
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CourseName string
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TutorName string
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RoomName string
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}{current.Duration / models.MinuteGranularity,
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current.Hour,
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current.Minute,
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current.Hour + ((current.Minute + current.Duration) / 60),
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(current.Minute + current.Duration) % 60,
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template.HTMLEscapeString(current.Course.Name),
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current.Tutor.Name,
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current.Room.Name,
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}
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tableCell.Execute(&celldata, data)
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tableBody += celldata.String()
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}
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} else {
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if slot+1 == slots[day] {
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tableBody += "<td style=\"border-right: 1px dotted\"></td>\n"
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} else {
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tableBody += "<td></td>\n"
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}
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}
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}
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}
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tableBody += "</tr>\n"
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}
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}
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var table bytes.Buffer
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tableTemplate, _ := template.ParseFiles("templates/officeHourTable.html")
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tableData := struct {
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ColspanMon int
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ColspanTue int
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ColspanWed int
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ColspanThu int
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ColspanFri int
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TableBody template.HTML
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}{
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slots[0],
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slots[1],
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slots[2],
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slots[3],
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slots[4],
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template.HTML(tableBody),
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}
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tableTemplate.Execute(&table, tableData)
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return template.HTML(table.String())
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}
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