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

backend/service/events/courseService.go

@@ -0,0 +1,12 @@
+package events
+
+import (
+	"github.com/labstack/echo/v5"
+	"github.com/pocketbase/pocketbase"
+	"htwk-planner/service/db"
+)
+
+func GetAllCourses(app *pocketbase.PocketBase, c echo.Context) error {
+	courses := db.GetAllCourses(app)
+	return c.JSON(200, courses)
+}

backend/service/events/eventService.go

@@ -0,0 +1,63 @@
+package events
+
+import (
+	"github.com/labstack/echo/v5"
+	"github.com/pocketbase/pocketbase"
+	"htwk-planner/service/db"
+	"unicode"
+)
+
+func GetModulesForCourseDistinct(app *pocketbase.PocketBase, c echo.Context, course string, semester string) error {
+
+	modules, err := db.GetAllModulesForCourse(app, course, semester)
+	replaceEmptyEntryInStringArray(modules, "Sonderveranstaltungen")
+
+	if err != nil {
+		return c.JSON(400, err)
+	} else {
+		return c.JSON(200, modules)
+	}
+}
+
+func replaceEmptyEntryInStringArray(modules []string, replacement string) {
+	//replace empty string with "Sonderveranstaltungen"
+	for i, module := range modules {
+		if checkIfOnlyWhitespace(module) {
+			modules[i] = replacement
+		}
+	}
+}
+
+func replaceEmptyEntry(modules []struct {
+	Name   string
+	Course string
+}, replacement string) {
+	//replace empty string with "Sonderveranstaltungen"
+	for i, module := range modules {
+		if checkIfOnlyWhitespace(module.Name) {
+			modules[i].Name = replacement
+		}
+	}
+}
+
+// check if course is empty or contains only whitespaces
+func checkIfOnlyWhitespace(word string) bool {
+	for _, letter := range word {
+		if !unicode.IsSpace(letter) || !(letter == int32(160)) {
+			return false
+		}
+	}
+	return true
+}
+
+func GetAllModulesDistinct(app *pocketbase.PocketBase, c echo.Context) error {
+	modules, err := db.GetAllModulesDistinct(app)
+
+	replaceEmptyEntry(modules, "Sonderveranstaltungen")
+
+	if err != nil {
+		return c.JSON(400, err)
+	} else {
+		return c.JSON(200, modules)
+	}
+}