Merge pull request 'convert-to-table' (#18) from convert-to-table into master

Reviewed-on: http://git.plannaplan.pl/y0rune/frontend/pulls/18
Reviewed-by: Maciej <glowackimaciej97@gmail.com>

src/components/App.tsx

@@ -7,19 +7,19 @@ import styled from 'styled-components';
 
 const Wrapper = styled.div`
   display: flex;
+  height: calc(100vh - 80px);
 `;
 
 export const App = () => {
   const [isOpenTransfer, setOpenTransfer] = useState(false);
 
-
   const handleTransfer = () => {
     setOpenTransfer(!isOpenTransfer);
   };
 
   return (
     <>
-      <Topbar handleTransfer={handleTransfer}  />
+      <Topbar handleTransfer={handleTransfer} />
       <Transfer isOpen={isOpenTransfer} handleClose={handleTransfer} />
       <Wrapper>
         <Scheduler />

src/components/CourseCard.tsx

@@ -1,10 +1,11 @@
-import React, { useContext, MouseEvent } from 'react';
+import React, { useState, useContext, MouseEvent } from 'react';
 import Collapse from '@material-ui/core/Collapse';
 import ExpandIcon from '../assets/expand.png';
-import { Course, Group } from '../types/index';
+import { Course, Group, GroupType } from '../types/index';
 import { coursesContext } from '../contexts/CoursesProvider';
 import styled from 'styled-components';
 import { makeStyles } from '@material-ui/core/styles';
+import { ReactComponent as CloseIcon } from '../assets/close.svg';
 
 interface ClassExandIconProps {
   isSelected: boolean;
@@ -23,6 +24,7 @@ const CourseStyled = styled.div`
   border-radius: 10px;
   cursor: pointer;
   align-items: stretch;
+  position: relative;
 `;
 
 const CourseNameStyled = styled.div`
@@ -30,14 +32,18 @@ const CourseNameStyled = styled.div`
   padding-bottom: 10px;
 `;
 
-const ClassGroupStyled = styled.div`
+interface ClassGroupProps{
+  groupType:GroupType;
+}
+
+const ClassGroupStyled = styled.div<ClassGroupProps>`
   padding-top: 1px;
   padding-bottom: 1px;
   :hover {
     cursor: pointer;
-    transition: 1s;
-    background-color: #8bc8fb;
   }
+    outline-offset: -5px;
+    outline:${({groupType})=>groupType === "CLASS" ? "2px solid #5642AA" : "2px solid #866DF7"};
 `;
 
 const ClassExandIconStyled = styled.img<ClassExandIconProps>`
@@ -67,33 +73,43 @@ const useStyles = makeStyles({
   },
 });
 
+const DeleteFromBasketIcon = styled(CloseIcon)`
+  width: 20px;
+  cursor: pointer;
+  position: absolute;
+  left: 235px;
+  top: -10px;
+  &:hover {
+    fill: #d3d3d3;
+  }
+`;
+
 interface CourseCardProps {
-  onCardClick: (event: MouseEvent) => void;
   course: Course;
-  id: string;
-  isSelected: boolean;
 }
 
-export const CourseCard = ({ onCardClick, course, id, isSelected }: CourseCardProps) => {
+export const CourseCard = ({ course }: CourseCardProps) => {
+  const [isSelected, setSelected] = useState(false);
   const classes = useStyles();
 
-  const { addGroup } = useContext(coursesContext)!;
+  const { addGroup, deleteFromBasket } = useContext(coursesContext)!;
 
   const onGroupClick = (group: Group, id: number) => addGroup(group, id);
 
   return (
-    <CourseStyled onClick={onCardClick} id={id}>
+    <CourseStyled>
-      <CourseNameStyled>{course.name}</CourseNameStyled>
+      <DeleteFromBasketIcon onClick={() => deleteFromBasket(course.id)}></DeleteFromBasketIcon>
+      <CourseNameStyled onClick={() => setSelected(!isSelected)}>{course.name}</CourseNameStyled>
       <Collapse className={classes.expanded} in={isSelected} timeout="auto" unmountOnExit>
-        {course.groups.map((group, index) => (
+        {course.groups.sort((a,b)=> b.type.localeCompare(a.type)).map((group, index) => (
-          <ClassGroupStyled key={index} onClick={() => onGroupClick(group, course.id)}>
+          <ClassGroupStyled groupType={group.type} key={index} onClick={() => onGroupClick(group, course.id)}>
             <p>
               {group.time} {group.room} <br></br> {group.lecturer}
             </p>
           </ClassGroupStyled>
         ))}
       </Collapse>
-      <div onClick={onCardClick} id={id}>
+      <div onClick={() => setSelected(!isSelected)}>
         <ClassExandIconStyled isSelected={isSelected} alt="expand" src={ExpandIcon} />
       </div>
     </CourseStyled>

src/components/Dropdown.tsx

@@ -1,4 +1,4 @@
-import React, { useState, useContext, useEffect, MouseEvent } from 'react';
+import React, { useState, useContext, useEffect, MouseEvent, ChangeEvent } from 'react';
 import axios from 'axios';
 import { Input } from '@material-ui/core';
 import ClickAwayListener from '@material-ui/core/ClickAwayListener';
@@ -64,13 +64,10 @@ export const Dropdown = ({ clearInput, handleClearInput }: DropdownProps) => {
   }, [input, open, basket]);
 
   useEffect(() => {
-    if (clearInput) {
+    clearInput && (setInput(''), handleClearInput());
-      setInput('');
-      handleClearInput();
-    }
   }, [clearInput]);
 
-  const handleChange = (event: React.ChangeEvent<HTMLInputElement>) => setInput(event.target.value);
+  const handleChange = (event: ChangeEvent<HTMLInputElement>) => setInput(event.target.value);
 
   const handleClick = () => setOpen(true);
 
@@ -83,7 +80,7 @@ export const Dropdown = ({ clearInput, handleClearInput }: DropdownProps) => {
       const name = target.textContent;
 
       //porozmawiać z Filipem, żeby odrobinę przerobił endpoint
-      const course: Basket = { name: name.trim(), id: parseInt(id), lecture: null, classes: null };
+      const course: Basket = { name: name.trim(), id: parseInt(id) };
 
       addToBasket(course);
       setOpen(false);

src/components/Rightbar.tsx

@@ -9,8 +9,8 @@ const RightbarStyled = styled.div`
   padding-right: 15px;
   text-align: center;
   font-family: Lato;
+  height: 100%;
   width: 300px;
-  height: 85vh;
   overflow-y: scroll;
   ::-webkit-scrollbar-track {
     border-radius: 10px;
@@ -27,12 +27,24 @@ const RightbarStyled = styled.div`
   }
 `;
 const RightbarTextStyled = styled.div`
+  display: flex;
+  flex-direction: column;
   border-bottom: 1px solid;
 `;
 
-export const Rightbar = () => {
+const SaveButton = styled.div`
-  const [selectedCardId, setSelectedCardId] = useState<string | null>(null);
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  background-color: rgb(100, 181, 246) !important;
+  border-radius: 10px;
+  cursor: pointer;
+  height: 40px;
+  background-color: red;
+  margin-bottom: 10px;
+`;
 
+export const Rightbar = () => {
   const { courses, basket } = useContext(coursesContext)!;
 
   const getBasketGroups = () => {
@@ -42,27 +54,18 @@ export const Rightbar = () => {
 
   const filteredCourses = getBasketGroups();
 
-  //działa clunky
-  const onCardClick = (event: MouseEvent) => {
-    const target = event.currentTarget;
-    selectedCardId === target.id ? setSelectedCardId(null) : setSelectedCardId(target.id);
-  };
-
   //need to insert student name from db and course maybe based on current time or from db too
   return (
     <RightbarStyled>
       <RightbarTextStyled>
-        Hubert Wrzesiński<br></br>
+        <p>
-        Semestr zimowy 2020/2021
+          Hubert Wrzesiński<br></br>
+          Semestr zimowy 2020/2021
+        </p>
+        <SaveButton>SAVE</SaveButton>
       </RightbarTextStyled>
       {filteredCourses.map((course, index) => (
-        <CourseCard
+        <CourseCard course={course} key={index} />
-          course={course}
-          key={index}
-          id={index.toString()}
-          onCardClick={onCardClick}
-          isSelected={selectedCardId === index.toString()}
-        />
       ))}
     </RightbarStyled>
   );

src/components/Scheduler.tsx

@@ -1,32 +1,22 @@
-import React, { useEffect, useRef } from 'react';
+import React, { useEffect, MouseEvent, useRef } from 'react';
 import { useState } from 'react';
 import { SchedulerEvents } from './SchedulerEvents';
 import { days, hours } from '../constants/index';
-import styled from 'styled-components';
+import styled from 'styled-components/macro';
 
 const SchedulerWrapper = styled.div`
-  flex-grow: 3;
-  margin-top: 20px;
   border-collapse: collapse;
+  flex-grow: 1;
 `;
 
 const TableBody = styled.div`
   width: 100%;
-  height: 100%;
   display: flex;
   flex-direction: column;
 `;
 
 const TableRow = styled.div`
   display: flex;
-  flex-direction: row;
-`;
-
-const TableCell = styled.div`
-  border: 1px solid #ddd;
-  padding: 10px;
-  text-align: center;
-  flex: 1;
 `;
 
 const TableHead = styled.div`
@@ -34,57 +24,53 @@ const TableHead = styled.div`
   width: 100%;
 `;
 
-const TableHeadCell = styled.div`
+interface TableCellProps {
+  height: number;
+}
+
+const TableCell = styled.div<TableCellProps>`
+  height: ${({ height }) => height}px;
   border: 1px solid #ddd;
-  padding: 10px;
+  display: flex;
-  text-align: center;
+  align-items: center;
+  justify-content: center;
   flex: 1;
+  font-size: 24px;
+`;
+
+const T = styled.table`
+  width: 100%;
+  height: 100%;
 `;
 
 export const Scheduler = () => {
-  const [currentEventsIds, setCurrentEventsIds] = useState<Array<string>>([]);
   const cellRef = useRef<HTMLDivElement>(null);
   const [cellWidth, setCellWidth] = useState(0);
   const [cellTop, setCellTop] = useState(0);
 
+  const wrapperRef = useRef<HTMLDivElement>(null);
+  const [wrapperHeight, setWrapperHeight] = useState(0);
+
   useEffect(() => {
     const handleResize = () => {
-      if (cellRef.current) {
+      if (cellRef.current && wrapperRef.current) {
         setCellWidth(cellRef.current.getBoundingClientRect().width);
         setCellTop(cellRef.current.getBoundingClientRect().top);
+        setWrapperHeight(wrapperRef.current.getBoundingClientRect().height);
       }
     };
     handleResize();
     window.addEventListener('resize', handleResize);
   }, []);
 
-  useEffect(() => {
-    const displayEvents = () => {
-      currentEventsIds.map((eventId: string) => {
-        const event = document.getElementById(eventId);
-        if (event) {
-          event.style.display = 'block';
-        }
-      });
-    };
-    displayEvents();
-  }, [currentEventsIds]);
-
-  // const handleClick = (e: React.MouseEvent) => {
-  //   const cellId = e.currentTarget.id;
-  //   const column = cellId.slice(0, 1);
-  //   const row = cellId.slice(1);
-  //   const eventId = `eventCol${column}eventRow${Math.floor(parseInt(row) / 2)}`;
-
-  //   setCurrentEventsIds((currentEventsIds) => [...currentEventsIds, eventId]);
-  // };
-
   return (
     <>
-      <SchedulerWrapper>
+      <SchedulerWrapper ref={wrapperRef}>
         <TableHead>
           {days.map((day, index) => (
-            <TableHeadCell key={index}>{day}</TableHeadCell>
+            <TableCell height={wrapperHeight / 13} key={index} ref={cellRef}>
+              {day}
+            </TableCell>
           ))}
         </TableHead>
         <TableBody>
@@ -92,15 +78,17 @@ export const Scheduler = () => {
             <TableRow key={indexRow}>
               {[hour, '', '', '', '', ''].map((value, indexCell) =>
                 indexRow === 0 && indexCell === 1 ? (
-                  <TableCell key={`${indexRow}${indexCell}`} ref={cellRef}></TableCell>
+                  <TableCell height={wrapperHeight / 13} key={`${indexRow}${indexCell}`}></TableCell>
                 ) : (
-                  <TableCell key={`${indexRow}${indexCell}`}>{value}</TableCell>
+                  <TableCell height={wrapperHeight / 13} key={`${indexRow}${indexCell}`}>
+                    {value}
+                  </TableCell>
                 ),
               )}
             </TableRow>
           ))}
         </TableBody>
-        <SchedulerEvents cellTop={cellTop} cellWidth={cellWidth} />
+        <SchedulerEvents cellTop={cellTop} cellWidth={cellWidth} cellHeight={wrapperHeight / 13} />
       </SchedulerWrapper>
     </>
   );

src/components/SchedulerEvents.tsx

@@ -1,15 +1,15 @@
-import React, { useContext, useEffect, useState } from 'react';
+import React, { useContext, useEffect, useState, MouseEvent } from 'react';
 import { SchedulerRow } from './SchedulerRow';
 import { coursesContext } from '../contexts/CoursesProvider';
 import { Group, Basket } from '../types';
-import classes from '*.module.css';
 
 interface SchedulerEventsProps {
   cellTop: number;
   cellWidth: number;
+  cellHeight: number;
 }
 
-export const SchedulerEvents = ({ cellTop, cellWidth }: SchedulerEventsProps) => {
+export const SchedulerEvents = ({ cellTop, cellWidth, cellHeight }: SchedulerEventsProps) => {
   const { basket } = useContext(coursesContext)!;
 
   const [choosenGroupsMappedToEvents, setChoosenGroupsMappedToEvents] = useState<any>([]);
@@ -28,20 +28,21 @@ export const SchedulerEvents = ({ cellTop, cellWidth }: SchedulerEventsProps) =>
 
   useEffect(() => {
     function mapGroupTimeToEventRow(basket: Array<Basket>) {
-      const classes = basket.map(({ classes }) => classes).filter((cl) => cl !== null) as Array<Group>;
+      const classes = basket.map(({ classes, name }) => ({ ...classes, name })) as Array<Group & { name: string }>;
-      const lectures = basket.map(({ lecture }) => lecture).filter((lec) => lec !== null) as Array<Group>;
+      const lectures = basket.map(({ lecture, name }) => ({ ...lecture, name })) as Array<Group & { name: string }>;
       const merged = [...classes, ...lectures];
 
-      if (merged.length >= 1) {
+      //deleted if statement, maybe it is needed
-        const groupsMapped = merged.map(({ id, day, lecturer, room, time }) => ({
+      const groupsMapped = merged.map(({ id, day, lecturer, room, time, name,type }) => ({
-          id,
+        id,
-          day,
+        day: day === 5 ? 4 : day,
-          lecturer,
+        lecturer,
-          room,
+        room,
-          eventRow: groupTimeToEventRowMapping[time],
+        eventRow: groupTimeToEventRowMapping[time],
-        }));
+        name,
-        setChoosenGroupsMappedToEvents(groupsMapped);
+        type,
-      }
+      }));
+      setChoosenGroupsMappedToEvents(groupsMapped);
     }
     mapGroupTimeToEventRow(basket);
   }, [basket]);
@@ -51,18 +52,25 @@ export const SchedulerEvents = ({ cellTop, cellWidth }: SchedulerEventsProps) =>
       {[...Array(6)].map((_, index) => (
         <SchedulerRow
           key={index}
-          groups={choosenGroupsMappedToEvents.filter((group: any) => {
+          groups={choosenGroupsMappedToEvents.filter((group: any) => group.eventRow === index)}
-            return group.eventRow === index;
-          })}
           indexRow={index}
           cellTop={
-            index == 3
+            index === 0
-              ? cellTop + (25 + 80 * index)
+              ? cellTop + (cellHeight + cellHeight * 2 * index + cellHeight / 4)
-              : index < 3
+              : index === 1
-              ? cellTop + (12 + 80 * index)
+              ? cellTop + (cellHeight + cellHeight * 2 * index)
-              : cellTop + (25 + 80 * index)
+              : index === 2
+              ? cellTop + (cellHeight + cellHeight * 2 * index - cellHeight / 4)
+              : index === 3
+              ? cellTop + (cellHeight + cellHeight * 2 * index - cellHeight / 4)
+              : index === 4
+              ? cellTop + (cellHeight + cellHeight * 2 * index - cellHeight / 2)
+              : index === 5
+              ? cellTop + (cellHeight + cellHeight * 2 * index - (cellHeight * 3) / 4)
+              : 0
           }
           cellWidth={cellWidth}
+          cellHeight={cellHeight}
         />
       ))}
     </div>

src/components/SchedulerRow.tsx

@@ -1,32 +1,87 @@
-import React from 'react';
+import React, { MouseEvent, useEffect, useState } from 'react';
-import { Group } from '../types';
+import { Group, GroupType } from '../types';
-import styled from 'styled-components';
+import styled from 'styled-components/macro';
+import Popover from '@material-ui/core/Popover';
+import Typography from '@material-ui/core/Typography';
+import { makeStyles, createStyles, Theme } from '@material-ui/core/styles';
+
+const useStyles = makeStyles((theme: Theme) =>
+  createStyles({
+    popover: {
+      pointerEvents: 'none',
+    },
+    paper: {
+      padding: theme.spacing(1),
+      marginLeft: 5,
+      textAlign: 'center',
+    },
+  }),
+);
 
 interface SchedulerEventProps {
   eventIndex: number;
   cellTop: number;
   cellWidth: number;
+  cellHeight: number;
 }
 
 const SchedulerEvent = styled.div<SchedulerEventProps>`
   position: absolute;
-  top: ${(props) => props.cellTop}px;
+  display: flex;
-  left: ${(props) => props.cellWidth + 5 + props.cellWidth * props.eventIndex}px;
+  top: ${({ cellTop }) => cellTop}px;
-  width: ${(props) => (props.cellWidth * 2) / 3}px;
+  left: ${({ cellWidth, eventIndex }) => cellWidth + 5 + cellWidth * eventIndex}px;
-  height: 69px;
+  width: ${({ cellWidth }) => (cellWidth * 2.5) / 3}px;
-  background-color: lightblue;
+  height: ${({ cellHeight }) => (cellHeight * 2 * 3) / 4}px;
   z-index: 2;
 `;
 
+interface ClassesProps{
+  cellWidth: number;
+  cellHeight: number;
+  groupType: GroupType;
+}
+
+const Classes = styled.div<ClassesProps>`
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  z-index: 2;
+  border-radius: 10px;
+  /* background-color: rgb(100, 181, 246); */
+  width: ${({ cellWidth }) => (cellWidth * 2.5) / 3}px;
+  height: ${({ cellHeight }) => (cellHeight * 2 * 3) / 4}px;
+  margin-right: 5px;
+  text-align: center;
+  background-color:${({groupType})=>groupType === "CLASS" ? "#5642AA" : "#866DF7"}
+`;
+
 interface SchedulerRowProps {
-  groups: Array<Group>;
+  groups: Array<Group & { name: string }>;
   indexRow: number;
   cellTop: number;
   cellWidth: number;
+  cellHeight: number;
 }
 
-export const SchedulerRow = ({ groups, indexRow, cellTop, cellWidth }: SchedulerRowProps) => {
+export const SchedulerRow = ({ groups, indexRow, cellTop, cellWidth, cellHeight }: SchedulerRowProps) => {
+  const classes = useStyles();
+  const [anchorEl, setAnchorEl] = React.useState<HTMLDivElement | null>(null);
+  const [popoverId, setPopoverId] = useState<string | null>(null);
 
+  console.log("123s"+JSON.stringify(groups));
+
+  //looks weird
+  const handlePopoverOpen = (event: MouseEvent<HTMLDivElement, globalThis.MouseEvent>) => {
+    setAnchorEl(event.currentTarget);
+    setPopoverId(event.currentTarget.id);
+  };
+
+  const handlePopoverClose = () => {
+    setAnchorEl(null);
+    setPopoverId(null);
+  };
+
+  const open = Boolean(anchorEl);
 
   return (
     <>
@@ -35,11 +90,58 @@ export const SchedulerRow = ({ groups, indexRow, cellTop, cellWidth }: Scheduler
           eventIndex={eventIndex}
           cellTop={cellTop}
           cellWidth={cellWidth}
+          cellHeight={cellHeight}
           key={eventIndex}
           id={`eventRow${indexRow}eventCol${eventIndex}`}
         >
-          {groups.map((group, index) =>
+          {groups.map(
-            group.day === eventIndex && <div key={index}>{groups[index]?.lecturer}</div>,
+            (group, index) =>
+              group.day === eventIndex && (
+                <>
+                  <Classes
+                    groupType={group.type}
+                    cellWidth={cellWidth}
+                    cellHeight={cellHeight}
+                    id={`eventRow${indexRow}eventCol${eventIndex}${index}`}
+                    key={index}
+                    aria-owns={open ? `mouse-over-popover` : undefined}
+                    aria-haspopup="true"
+                    onMouseEnter={(e) => handlePopoverOpen(e)}
+                    onMouseLeave={handlePopoverClose}
+                  >
+                    <p>
+                      {groups[index].name}
+                      <br></br>
+                      {groups[index].room}
+                    </p>
+                  </Classes>
+                  <Popover
+                    id={`mouse-over-popover`}
+                    className={classes.popover}
+                    classes={{
+                      paper: classes.paper,
+                    }}
+                    open={popoverId === `eventRow${indexRow}eventCol${eventIndex}${index}`}
+                    anchorEl={anchorEl}
+                    anchorOrigin={{
+                      vertical: 'top',
+                      horizontal: 'right',
+                    }}
+                    transformOrigin={{
+                      vertical: 'center',
+                      horizontal: 'left',
+                    }}
+                    onClose={handlePopoverClose}
+                    disableRestoreFocus
+                  >
+                    <Typography>
+                      <p>{groups[index].name}</p>
+                      <p>{groups[index].lecturer}</p>
+                      <p>{groups[index].room}</p>
+                    </Typography>
+                  </Popover>
+                </>
+              ),
           )}
         </SchedulerEvent>
       ))}

src/components/Topbar.tsx

@@ -102,9 +102,9 @@ export default function ({ handleTransfer }: TopbarProps) {
       <TopbarInputStyled>
         <TopbarInputIconStyled alt="search" src={Search} />
         <TopbarInputFieldStyled>
-          <Dropdown clearInput={clearInput} handleClearInput={handleClearInput}/>
+          <Dropdown clearInput={clearInput} handleClearInput={handleClearInput} />
         </TopbarInputFieldStyled>
-        <TopbarInputIconStyled alt="close" src={CloseIcon} onClick={handleClearInput}/>
+        <TopbarInputIconStyled alt="close" src={CloseIcon} onClick={handleClearInput} />
       </TopbarInputStyled>
       <TopbarIconBox>
         <TopbarIcon alt="transfer" src={Transfer} onClick={handleTransfer} />
@@ -114,4 +114,4 @@ export default function ({ handleTransfer }: TopbarProps) {
       </TopbarIconBox>
     </Topbar>
   );
-};
+}

src/constants/index.ts

@@ -1,10 +1,10 @@
 export const days = [
   "",
-  "poniedziałek",
+  "Poniedziałek",
-  "wtorek",
+  "Wtorek",
-  "środa",
+  "Środa",
-  "czwartek",
+  "Czwartek",
-  "piątek",
+  "Piątek",
 ];
 export const hours = [
   "8:00",

src/contexts/CoursesProvider.tsx

@@ -1,4 +1,4 @@
-import React, { useState, createContext, useEffect } from 'react';
+import React, { useState, createContext, useEffect, ReactNode } from 'react';
 import { Course, Group, Basket, GroupType } from '../types';
 import axios from 'axios';
 
@@ -7,11 +7,12 @@ interface CourseContext {
   basket: Array<Basket>;
   addToBasket: (courses: Basket) => void;
   addGroup: (group: Group, id: number) => void;
+  deleteFromBasket: (id: number) => void;
 }
 export const coursesContext = createContext<CourseContext | null>(null);
 
 interface CoursesProviderProps {
-  children: React.ReactNode;
+  children: ReactNode;
 }
 
 export const CoursesProvider = ({ children }: CoursesProviderProps) => {
@@ -21,6 +22,9 @@ export const CoursesProvider = ({ children }: CoursesProviderProps) => {
 
   const addToBasket = (course: Basket) => setBasket([...basket, course]);
 
+  const deleteFromBasket = (id: number) => setBasket(basket.filter(course => course.id !== id));
+
+
   useEffect(() => {
     console.log('BASKET');
     console.log(basket);
@@ -52,6 +56,6 @@ export const CoursesProvider = ({ children }: CoursesProviderProps) => {
   }, []);
 
   return (
-    <coursesContext.Provider value={{ courses, basket, addToBasket, addGroup }}>{children}</coursesContext.Provider>
+    <coursesContext.Provider value={{ courses, basket, addToBasket, addGroup, deleteFromBasket }}>{children}</coursesContext.Provider>
   );
 };

src/types/index.ts

@@ -6,8 +6,8 @@ export enum GroupType {
 export interface Basket {
   id: number;
   name: string;
-  lecture: Group | null;
+  lecture?: Group;
-  classes: Group | null;
+  classes?: Group;
 }
 
 export interface Group {