added frontend and updated backend with docker, wrote some initial instructions

backend/service/db/dbGroups.go

@@ -0,0 +1,81 @@
+package db
+
+import (
+	"github.com/pocketbase/dbx"
+	"github.com/pocketbase/pocketbase"
+	"github.com/pocketbase/pocketbase/models"
+	"htwk-planner/model"
+)
+
+func SaveGroups(seminarGroup []model.SeminarGroup, collection *models.Collection, app *pocketbase.PocketBase) ([]*models.Record, error) {
+	var savedRecords []*models.Record
+	var tobeSavedGroups []model.SeminarGroup
+	var insertRecords []*models.Record
+
+	for _, group := range seminarGroup {
+		dbGroup, err := FindGroupByCourse(group.Course, app)
+
+		if dbGroup == nil && err.Error() == "sql: no rows in result set" {
+			tobeSavedGroups = append(tobeSavedGroups, group)
+		} else if err != nil {
+			return nil, err
+		}
+	}
+
+	// create record for each group that's not already in the database
+	for _, group := range tobeSavedGroups {
+		record := models.NewRecord(collection)
+		record.Set("university", group.University)
+		record.Set("shortcut", group.GroupShortcut)
+		record.Set("groupId", group.GroupId)
+		record.Set("course", group.Course)
+		record.Set("faculty", group.Faculty)
+		record.Set("facultyId", group.FacultyId)
+		insertRecords = append(insertRecords, record)
+	}
+
+	// save all records
+	for _, record := range insertRecords {
+		if record != nil {
+			err := app.Dao().SaveRecord(record)
+			if err == nil {
+				savedRecords = append(savedRecords, record)
+			} else {
+				return nil, err
+			}
+		}
+	}
+
+	return savedRecords, nil
+}
+
+func FindGroupByCourse(course string, app *pocketbase.PocketBase) (*model.SeminarGroup, error) {
+	var group model.SeminarGroup
+	err := app.Dao().DB().Select("*").From("groups").Where(dbx.NewExp("course = {:course}", dbx.Params{"course": course})).One(&group)
+	if err != nil {
+		return nil, err
+	}
+	return &group, err
+}
+
+func GetAllCourses(app *pocketbase.PocketBase) []string {
+
+	var courses []struct {
+		CourseShortcut string `db:"course" json:"course"`
+	}
+
+	// get all rooms from event records in the events collection
+	err := app.Dao().DB().Select("course").From("groups").All(&courses)
+	if err != nil {
+		print("Error while getting groups from database: ", err)
+		return nil
+	}
+
+	var courseArray []string
+
+	for _, course := range courses {
+		courseArray = append(courseArray, course.CourseShortcut)
+	}
+
+	return courseArray
+}