implemented assigning users to events

backend/pkg/db/availabilities/userAvailabilities.go

@@ -9,7 +9,9 @@ type eventAvailabilities struct {
 	AvailabilityID int    `db:"availabilityID"`
 }
 
-func Event(eventID int) (map[string]string, error) {
+type AvailabilityMap map[int][]string
+
+func Event(eventID int) (AvailabilityMap, error) {
 	// get the availabilities for the event
 	var availabilitiesRows []eventAvailabilities
 
@@ -17,17 +19,18 @@ func Event(eventID int) (map[string]string, error) {
 		return nil, err
 	} else {
 		// transform the result into a map
-		eventAvailabilities := map[string]string{}
+		eventAvailabilities := AvailabilityMap{}
 
 		// get the availabilities
-		if availabilitiesMap, err := Keys(); err != nil {
-			return nil, err
-		} else {
-			for _, a := range availabilitiesRows {
-				eventAvailabilities[a.UserName] = availabilitiesMap[a.AvailabilityID].AvailabilityName
+		for _, a := range availabilitiesRows {
+			// if there is no slice for this availability, create it
+			if _, exists := eventAvailabilities[a.AvailabilityID]; !exists {
+				eventAvailabilities[a.AvailabilityID] = make([]string, 0)
 			}
 
-			return eventAvailabilities, nil
+			eventAvailabilities[a.AvailabilityID] = append(eventAvailabilities[a.AvailabilityID], a.UserName)
 		}
+
+		return eventAvailabilities, nil
 	}
 }

backend/pkg/db/events/events.go

@@ -32,7 +32,7 @@ type EventWithAssignment struct {
 
 type EventWithAvailabilities struct {
 	EventWithAssignment
-	Availabilities map[string]string `json:"availabilities"`
+	Availabilities availabilities.AvailabilityMap `json:"availabilities"`
 }
 
 type EventCreate struct {
@@ -268,8 +268,22 @@ func User(userName string) ([]EventWithAssignment, error) {
 }
 
 // set the availability of an user for a specific event
-func UserAvailability(userName string, eventID, availabilityID int) error {
+func UserAvailability(eventID, availabilityID int, userName string) error {
 	_, err := db.DB.Exec("INSERT INTO USER_AVAILABILITIES (userName, eventID, availabilityID) VALUES ($1, $2, $3) ON CONFLICT (userName, eventID) DO UPDATE SET availabilityID = $3", userName, eventID, availabilityID)
 
 	return err
 }
+
+// set the assignment of an user to a task for a specific event
+func SetAssignment(eventID, taskID int, userName string) error {
+	_, err := db.DB.Exec("UPDATE USER_ASSIGNMENTS SET userName = $1 WHERE eventID = $2 AND taskID = $3", userName, eventID, taskID)
+
+	return err
+}
+
+// remove the assignment of an user
+func DeleteAssignment(eventID, taskID int) error {
+	_, err := db.DB.Exec("UPDATE USER_ASSIGNMENTS SET userName = null WHERE eventID = $1 AND taskID = $2", eventID, taskID)
+
+	return err
+}

backend/pkg/router/events.go

@@ -137,14 +137,74 @@ func (a *Handler) putEventUserAvailability() {
 			logger.Log().Msgf("setting user-event-availability failed: can't get parse: %v", err)
 
 			// insert the availability into the database
-		} else if err := events.UserAvailability(a.UserName, eventID, availabilityID); err != nil {
+		} else if err := events.UserAvailability(eventID, availabilityID, a.UserName); err != nil {
 			a.Status = fiber.StatusInternalServerError
 
 			logger.Error().Msgf("setting user-event-availability failed: can't write availability to database: %v", err)
 		}
 	}
+}
+
+func (a *Handler) putEventAssignment() {
+	// check admin
+	if !a.Admin {
+		a.Status = fiber.StatusUnauthorized
+
+		logger.Warn().Msg("setting event-assignment failed: user is no admin")
+
+		// retrieve the eventID from the query
+	} else if eventID := a.C.QueryInt("eventID", -1); eventID == -1 {
+		a.Status = fiber.StatusBadRequest
+
+		logger.Warn().Msg("setting event-assignment failed: query is missing \"eventID\"")
+
+		// retrieve the taskID from the query
+	} else if taskID := a.C.QueryInt("taskID", -1); taskID == -1 {
+		a.Status = fiber.StatusBadRequest
+
+		logger.Warn().Msg("setting event-assignment failed: query is missing \"taskID\"")
+
+		// parse the body
+	} else if userName := string(a.C.Body()); userName == "" {
+		a.Status = fiber.StatusBadRequest
+
+		logger.Warn().Msg("setting event-assignment failed: body is missing")
+
+		// set the availability in the database
+	} else if err := events.SetAssignment(eventID, taskID, userName); err != nil {
+		a.Status = fiber.StatusBadRequest
+
+		logger.Warn().Msgf("setting event-assignment failed: can't write to database: %v", err)
+	}
+
+}
+
+func (a *Handler) deleteEventAssignment() {
+	// check admin
+	if !a.Admin {
+		a.Status = fiber.StatusUnauthorized
+
+		logger.Warn().Msg("deleting event-assignment failed: user is no admin")
+
+		// retrieve the eventID from the query
+	} else if eventID := a.C.QueryInt("eventID", -1); eventID == -1 {
+		a.Status = fiber.StatusBadRequest
+
+		logger.Warn().Msg("deleting event-assignment failed: query is missing \"eventID\"")
+
+		// retrieve the taskID from the query
+	} else if taskID := a.C.QueryInt("taskID", -1); taskID == -1 {
+		a.Status = fiber.StatusBadRequest
+
+		logger.Warn().Msg("deleting event-assignment failed: query is missing \"taskID\"")
+
+		// set the availability in the database
+	} else if err := events.DeleteAssignment(eventID, taskID); err != nil {
+		a.Status = fiber.StatusBadRequest
+
+		logger.Warn().Msgf("deleting event-assignment failed: can't write to database: %v", err)
+	}
 
-	// parse the body
 }
 
 func (a *Handler) deleteEvent() {

backend/pkg/router/router.go

@@ -107,14 +107,16 @@ func init() {
 			"tasks":          (*Handler).patchTask,          // modify a task
 		},
 		"PUT": {
-			"users/password":           (*Handler).putPassword,              // change the password
 			"events/user/availability": (*Handler).putEventUserAvailability, // set or change the users availability for a specific event
+			"events/assignments":       (*Handler).putEventAssignment,
+			"users/password":           (*Handler).putPassword, // change the password
 		},
 		"DELETE": {
-			"event":          (*Handler).deleteEvent,        // remove an event
-			"tasks":          (*Handler).deleteTask,         // remove a task
-			"availabilities": (*Handler).deleteAvailability, // remove an availability
-			"users":          (*Handler).deleteUser,         // remove an user
+			"event":              (*Handler).deleteEvent, // remove an event
+			"events/assignments": (*Handler).deleteEventAssignment,
+			"tasks":              (*Handler).deleteTask,         // remove a task
+			"availabilities":     (*Handler).deleteAvailability, // remove an availability
+			"users":              (*Handler).deleteUser,         // remove an user
 		},
 	}
 

client/src/app/MyEvents.tsx

@@ -10,8 +10,12 @@ export default function MyEvents() {
 			const result = await apiCall<EventData[]>("GET", "events/user/assigned");
 
 			if (result.ok) {
+				const data = await result.json();
+
+				console.debug(data);
+
 				return {
-					items: await result.json(),
+					items: data,
 				};
 			} else {
 				return {

client/src/app/assignments/page.tsx

@@ -3,7 +3,7 @@
 import AddEvent from "@/components/Event/AddEvent";
 import EditEvent from "@/components/Event/EditEvent";
 import LocalDate from "@/components/LocalDate";
-import { apiCall, getTasks } from "@/lib";
+import { apiCall, getAvailabilities, getTasks } from "@/lib";
 import { EventData } from "@/Zustand";
 import {
 	Add,
@@ -21,6 +21,7 @@ import {
 	Dropdown,
 	DropdownItem,
 	DropdownMenu,
+	DropdownSection,
 	DropdownTrigger,
 	Modal,
 	ModalBody,
@@ -37,14 +38,21 @@ import {
 	Tooltip,
 } from "@heroui/react";
 import { useAsyncList } from "@react-stately/data";
-import React, { Key, useState } from "react";
+import React, { Key, ReactElement, useEffect, useState } from "react";
+import { Availability } from "../admin/(availabilities)/AvailabilityEditor";
+import AvailabilityChip from "@/components/AvailabilityChip";
 
-type EventWithAvailabilities = EventData & { availabilities: string[] };
+type EventWithAvailabilities = EventData & {
+	availabilities: Record<string, string[]>;
+};
 
 export default function AdminPanel() {
 	const [showAddEvent, setShowAddEvent] = useState(false);
 	const [editEvent, setEditEvent] = useState<EventData | undefined>();
 	const [deleteEvent, setDeleteEvent] = useState<EventData | undefined>();
+	const [availabilityMap, setAvailabilityMap] = useState<
+		Record<number, Availability>
+	>({});
 
 	// get the available tasks and craft them into the headers
 	const headers = useAsyncList<{
@@ -113,6 +121,51 @@ export default function AdminPanel() {
 		},
 	});
 
+	// retrieve the availabilites and store them in a map
+	useEffect(() => {
+		(async () => {
+			setAvailabilityMap(
+				Object.fromEntries(
+					(await getAvailabilities()).map((a) => [a.availabilityID, a]),
+				),
+			);
+		})();
+	}, []);
+
+	function getAvailabilityById(availabilityID: number): Availability {
+		return availabilityMap[availabilityID];
+	}
+
+	// send a command to the backend to assign a volunteer to a task
+	async function sendVolunteerAssignment(
+		eventID: number,
+		taskID: number,
+		userName: string,
+	) {
+		const result = await apiCall(
+			"PUT",
+			"events/assignments",
+			{ eventID, taskID },
+			userName,
+		);
+
+		if (result.ok) {
+			events.reload();
+		}
+	}
+
+	// sends a command to the backend to remove an volunteer-assignment
+	async function removeVolunteerAssignment(eventID: number, taskID: number) {
+		const result = await apiCall("DELETE", "events/assignments", {
+			eventID,
+			taskID,
+		});
+
+		if (result.ok) {
+			events.reload();
+		}
+	}
+
 	// send a delete request to the backend and close the popup on success
 	async function sendDeleteEvent() {
 		if (deleteEvent !== undefined) {
@@ -123,6 +176,9 @@ export default function AdminPanel() {
 			if (result.ok) {
 				// store the received events
 				events.reload();
+
+				// close the delete-confirmaton
+				setDeleteEvent(undefined);
 			}
 		}
 	}
@@ -184,9 +240,13 @@ export default function AdminPanel() {
 					return (
 						<Dropdown>
 							<DropdownTrigger>
-								{!!event.tasks.find((t) => t.taskID === key)?.userName ? (
-									<Chip onClose={() => alert("implement")}>
-										{event.tasks.find((t) => t.taskID === key)?.taskName}
+								{!!event.tasks.find((t) => t.taskID == key)?.userName ? (
+									<Chip
+										onClose={() =>
+											removeVolunteerAssignment(event.eventID, key as number)
+										}
+									>
+										{event.tasks.find((t) => t.taskID == key)?.userName}
 									</Chip>
 								) : (
 									<Button isIconOnly size="sm" radius="md" variant="flat">
@@ -194,19 +254,50 @@ export default function AdminPanel() {
 									</Button>
 								)}
 							</DropdownTrigger>
-							<DropdownMenu>
+							<DropdownMenu
+								onAction={(a) =>
+									sendVolunteerAssignment(
+										event.eventID,
+										key as number,
+										a as string,
+									)
+								}
+							>
 								{Object.entries(event.availabilities).map(
-									([volunteer, availability]) => (
-										<DropdownItem
-											key={volunteer}
-											// color={availability2Color(availability)}
-											className={[
-												// "text-" + availability2Color(availability),
-												// availability2Tailwind(availability),
-											].join(" ")}
+									(
+										[availabilityId, volunteers],
+										iAvailability,
+										aAvailabilities,
+									) => (
+										<DropdownSection
+											key={availabilityId}
+											showDivider={iAvailability < aAvailabilities.length - 1}
+											classNames={{
+												base: "flex flex-col justify-start",
+												heading: "mx-auto",
+											}}
+											className="justi"
+											title={
+												(
+													<AvailabilityChip
+														availability={getAvailabilityById(
+															parseInt(availabilityId),
+														)}
+													/>
+												) as ReactElement & string
+											}
 										>
-											{volunteer} ({availability})
-										</DropdownItem>
+											{volunteers.map((v) => (
+												<DropdownItem
+													key={v}
+													classNames={{
+														base: "", // this empty class is needed, else some styles are applied
+													}}
+												>
+													{v}
+												</DropdownItem>
+											))}
+										</DropdownSection>
 									),
 								)}
 							</DropdownMenu>

client/src/components/AvailabilityChip.tsx

@@ -6,11 +6,11 @@ export default function AvailabilityChip({
 	availability,
 	className,
 }: {
-	availability: Availability;
+	availability?: Availability;
 	className?: string;
 	classNames?: ChipProps["classNames"];
 }) {
-	return (
+	return !!availability ? (
 		<Chip
 			classNames={{
 				base: `bg-${color2Tailwind(availability.color)}`,
@@ -19,5 +19,5 @@ export default function AvailabilityChip({
 		>
 			{availability.availabilityName}
 		</Chip>
-	);
+	) : null;
 }

client/src/lib.ts

@@ -59,7 +59,7 @@ export async function apiCall<K>(
 		},
 		credentials: "include",
 		method,
-		body: body !== undefined ? JSON.stringify(body) : undefined,
+		body: prepareBody(body),
 	});
 
 	return response;
@@ -79,6 +79,19 @@ function getContentType(type: string): string {
 	}
 }
 
+function prepareBody(
+	body: object | number | string | boolean | undefined,
+): BodyInit | undefined {
+	switch (typeof body) {
+		case "object":
+			return JSON.stringify(body);
+		case "undefined":
+			return undefined;
+		default:
+			return body.toString();
+	}
+}
+
 export function classNames(classNames: Record<string, boolean>): string {
 	return Object.entries(classNames)
 		.map(([classString, value]) => {
@@ -157,11 +170,11 @@ export async function getAvailabilities(): Promise<Availability[]> {
 		const result = await apiCall<Availability[]>("GET", "availabilities");
 
 		if (result.ok) {
-			const tasks = await result.json();
+			const availabilities = await result.json();
 
-			state.patch({ availabilities: tasks });
+			state.patch({ availabilities: availabilities });
 
-			return tasks;
+			return availabilities;
 		} else {
 			return [];
 		}